Wuxi DK Electronic Materials is pursuing two patent infringement cases against domestic competitors, seeking injunctions, equipment destruction, and combined damages of CNY 400 million ($57.5 million).

Wuxi DK Electronic Materials has filed two patent infringement lawsuits with the Jiangsu High People’s Court against Jiangsu Riyu Photovoltaic New Materials and Suzhou Jinyin New Materials Technology , seeking CNY 200 million in damages and related legal costs in each case.

The company said both filings have been formally accepted and registered by the court, although hearing dates have not yet been scheduled.

The lawsuits concern two Chinese invention patents, ZL201180032359.1 and ZL201180032701.8, covering thick-film conductive paste formulations for semiconductor devices, including solar cells. DKEM said the patents are held by its subsidiary Solamet Electronic Materials and relate to lead-tellurium-lithium and oxide-based paste technologies.

DKEM is seeking injunctions to halt the manufacture, sale, and offering for sale of the allegedly infringing pastes. The company is also requesting the destruction of dedicated production equipment and molds, and compensation for economic losses, enforcement costs, and related expenses.

The patents trace back to the intellectual property portfolio of DuPont’s former Solamet photovoltaic paste business, acquired by another entity in 2021 for $190 million. DKEM later consolidated control of the Solamet assets and associated intellectual property.

Suzhou Jinyin is described in Chinese financial reporting as a leading supplier of front-side silver paste for solar cells, ranking third globally by market share. Founded in 2011, it was later acquired by listed electronics firm Suzhou Good-Ark Electronics. Jiangsu Riyu is a fast-growing paste supplier that filed a Hong Kong listing application in 2025, with plans to expand into n-type and back-contact paste products.

This follows earlier high-value patent actions by DKEM. In 2025, its subsidiary filed a suit against Zhejiang Guangda Electronic Technology seeking similar remedies. A Solamet-linked entity also pursued related claims against Changzhou Juhe New Materials in 2021, with domestic and overseas disputes reportedly settled in August 2022.

Separately, DKEM flagged earnings pressure, forecasting a net loss of CNY 200 million to CNY 300 million for 2025, primarily linked to non-operating factors, according to Chinese financial media.

Scientists have grown organic romaine lettuce under 13 different types of PV modules, in an unusual hot Canadian summer. Their analysis showed lettuce yields increased by over 400% compared to unshaded control plants.

A research group from Canada’s Western University has investigated the performance of organic romaine lettuce, a heat-sensitive crop, under a broad range of agrivoltaic conditions. The test was conducted in London, Ontario, in the summer of 2025, during which 18 days had temperatures over 30 C.

“Our study explores how agrivoltaic systems can be tailored to optimize crop growth, especially under extreme heat conditions, while contributing to sustainable energy generation,” corresponding researcher Uzair Jamil told pv magazine.

“This becomes especially relevant in the context of climate change, where we are experiencing temperature extremes across the world,” Jamil added. “We examined the performance of organic romaine lettuce under thirteen different agrivoltaic configurations – ranging from crystalline silicon PV to thin-film-colored modules (red, blue, green) – in outdoor, high-temperature stress conditions.”

More specifically, the experiment included c-Si modules with 8%, 44% and 69% transparency rate; blue c-Si modules with transparency of 60%, 70%, and 80%; green c-Si modules with transparency of 60%, 70%, and 80%; and red c-Si modules with transparency of of 40%, 50%, 70%, and 80%.

All agrivoltaics installations had a leading-edge height of 2.0 m and a trailing-edge height of 2.8 m, and the modules were oriented southwards at 34◦. Pots with organic romaine lettuce were placed under all configurations, along with three pots fully exposed to ambient sunlight without shading, used as controls.

In addition to measurements against the control, the scientific group has compared the results to the national average per-pot yield for 2022, which included less high-temperature days and was therefore considered typical. Those data points were taken from agricultural census data, which later enabled the researcher also to create nationwide projections of their results.

“Lettuce yields increased by over 400% compared to unshaded control plants, and 200% relative to national average yields,” Jamil said about the results. “60% transparent blue Cd-Te and 44% transparent crystalline silicon PV modules delivered the highest productivity gains, demonstrating the importance of both shading intensity and spectral quality in boosting plant growth.”

Jamil further added that if agrivoltaic were to scale up to protect Canada’s entire lettuce crop, they could add 392,000 tonnes of lettuce.

“That translates into CAD $62.9 billion (USD $46.6 billion) in revenue over 25 years,” he said. “If scaled across Canada, agrivoltaics could also reduce 6.4 million tonnes of CO2 emissions over 25 years, making it a key player in reducing the agricultural sector’s environmental footprint.”

The results of the research work were presented in “Enhancing heat stress tolerance in organic romaine lettuce using crystalline silicon and red, blue & green-colored thin film agrivoltaic systems,” published in Solar Energy.

Polysilicon trading in China remained largely inactive, with production cuts accelerating and wafer prices falling week on week, while downstream cell prices continued to rise and module prices held steady, according to a trade group representing China's nonferrous metals sector.

The China Nonferrous Metals Industry Association (CNMA) said polysilicon trading remained largely stalled, with only limited exploratory orders completed. One leading producer has halted operations, while two others have implemented production cuts. January output is expected to fall by about 15% month on month, broadly in line with wafer production schedules, with February output forecast at 82,000 to 85,000 metric tons. The association said most wafer prices declined week on week, with average transaction prices at CNY 1.26 per piece for n-type G10L wafers, down 3.82%; CNY 1.32 for n-type G12R wafers, down 7.04%; and CNY 1.52 for n-type G12 wafers, down 8.43%. Downstream cell prices rose to CNY 0.41/W to CNY 0.45/W, up 4.88%, while module prices were stable at CNY 0.71/W to CNY 0.75/W.

Hoymiles has signed a supply contract with Indian renewable energy solutions provider KOSOL Energie to deliver 360 MW of its HMS series microinverters in 2026. The company said the products are optimized for India’s high-temperature, high-humidity, and high-irradiance conditions, as well as for larger module formats, large-scale commercial and industrial rooftops, and complex grid environments.

Boway Alloy has issued a profit warning, forecasting full-year 2025 net profit attributable to shareholders of CNY 100 million to CNY 150 million, down 88.9% to 92.6% year on year. The China-listed parent of Vietnam-based Boviet Solar said the decline reflects impairment charges linked to high US anti-dumping and countervailing duties on Vietnam-manufactured products, which made relocating production uneconomic, as well as reduced subsidies and order losses at its United States subsidiary following passage of the United States “Big and Beautiful” Act. Boway Alloy said it is exploring equity divestment options.

PowerChina has signed an engineering, procurement and construction (EPC) contract through its Colombia branch for a 251 MW solar project in Santander province, Colombia. The scope includes PV plant development, equipment supply, installation and commissioning, with a string inverter plus tracking system configuration intended to improve generation efficiency and operational stability.

Deye said it submitted an application on Jan. 27 to issue H shares and list on the main board of the Hong Kong Stock Exchange. The company said its listing application materials were published on the exchange’s website the same day.

Researchers at SUPSI found that six Swiss PV systems installed in the late 1980s and early 1990s show exceptionally low degradation rates of just 0.16% to 0.24% per year after more than 30 years of operation. The study shows that thermal stress, ventilation, and material design play a greater role in long-term module reliability than altitude or irradiance alone.

A research group led by Switzerland's University of Applied Sciences (SUPSI) has carried out a long-term analysis of six south-facing, grid-connected PV systems installed in Switzerland in the late 1980s and early 1990s. The researchers found that the systems’ annual power loss rates averaged 0.16% to 0.24%, significantly lower than the 0.75% to 1% per year commonly reported in the literature.

The study examined four low-altitude rooftop systems located in Möhlin (310m-VR-AM55), Tiergarten East and West in Burgdorf (533m-VR-SM55(HO)), and Burgdorf Fink (552m-BA-SM55). These installations use ventilated or building-applied rooftop configurations. The analysis also included a mid-altitude utility-scale plant in Mont-Soleil (1270m-OR-SM55) and two high-altitude, facade-mounted systems in Birg (2677m-VF-AM55) and Jungfraujoch (3462m-VF-SM75).

All systems are equipped with either ARCO AM55 modules manufactured by US-based Arco Solar, which was the world’s largest PV manufacturer with just 1 MW capacity at the time, or Siemens SM55, SM55-HO, and SM75 modules. Siemens became Arco Solar’s largest shareholder in 1990. The modules have rated power outputs between 48 W and 55 W and consist of a glass front sheet, ethylene-vinyl acetate (EVA) encapsulant layers, monocrystalline silicon cells, and a polymer backsheet laminate.

The test setup included on-site monitoring of AC and DC power output, ambient and module temperatures, and plane-of-array irradiance measured using pyranometers. Based on site conditions, the researchers classified the installations into low-, mid-, and high-altitude climate zones.

“For benchmarking purposes, two Siemens SM55 modules have been stored in a controlled indoor environment at the Photovoltaic Laboratory of the Bern University of Applied Sciences since the start of the monitoring campaign,” the researchers said. They also applied the multi-annual year-on-year (multi-YoY) method to determine system-level performance loss rates (PLR).

The results show that PLRs across all systems range from -0.12% to -0.55% per year, with an average of -0.24% to -0.16% per year, well below typical degradation rates reported for both older and modern PV systems. The researchers also found that higher-altitude systems generally exhibit higher average performance ratios and lower degradation rates than comparable low-altitude installations, despite exposure to higher irradiance and ultraviolet radiation.

The study further revealed that modules of the same nominal type but with different internal designs show markedly different degradation behaviour. Standard SM55 modules exhibited recurring solder bond failures, leading to increased series resistance and reduced fill factor. By contrast, SM55-HO modules benefited from a modified backsheet design that provides higher internal reflectance and improved long-term stability.

Overall, the findings indicate that long-term degradation in early-generation PV modules is driven primarily by thermal stress, ventilation conditions, and material design, rather than altitude or irradiance alone. Modules installed in cooler, better-ventilated environments demonstrated particularly stable performance over multiple decades.

The test results were presented in the paper “Three decades, three climates: environmental and material impacts on the long-term reliability of photovoltaic modules,” published in EES Solar.

“The study identified the bill-of-material (BOM) as the most critical factor influencing PV module longevity,” they concluded. “Despite all modules belonging to the same product family, variations in encapsulant quality, filler materials, and manufacturing processes resulted in significant differences in degradation rates. Early-generation encapsulants without UV stabilisation showed accelerated ageing, while later module designs with optimised backsheets and improved production quality demonstrated outstanding long-term stability.”

In a new weekly update for pv magazine, OPIS, a Dow Jones company, provides a quick look at the main price trends in the global PV industry.

China’s TOPCon cell prices rose for a fourth consecutive week, led by higher production costs from surging silver prices and ongoing discussions around the removal of export tax rebates. In contrast, PERC cell prices declined amid weakening demand, due to the industry’s continued technological shift towards TOPCon cells, according to trade sources.

According to the OPIS Global Solar Markets Report released on January 20, Chinese TOPCon M10 cell prices were assessed 2.24% higher on the week at $0.0547/W Free-On-Board (FOB) China. Meanwhile, FOB China Mono PERC M10 cells fell 2.53% to $0.0463/W over the same period.

Silver prices have surged to record highs, gaining more than 40% year-to-date, driven by rising industrial demand and increased investment flows. Chinese policy developments have also further tightened the market, with authorities introducing export restrictions on silver through 2027.

Under the new framework, only 44 approved companies are permitted to export silver under a quota-based licensing system, requiring exporters to secure approval for overseas shipments.

Market sources said silver prices have become a key variable for cell pricing, as silver now represents one of the largest cost components in TOPCon cell manufacturing. Several sources noted that even if upstream prices soften from Q2 2026, cell and module prices are unlikely to retreat to 2025 price levels should silver prices remain elevated.

Since the start of this year, downstream OPIS TOPCon cell prices have surged 46%, while TOPCon module prices climbed nearly 35%. Upstream cost increases have been more modest, with OPIS China Mono Premium—OPIS' assessment for mono-grade polysilicon used in N-type ingot production—up 0.15% and N-type wafer prices up around 13% over the same period.

This week, upstream polysilicon and wafers segments showed early signs of weakness, with OPIS China Mono Premium and N-type M10 wafers down 2.34% and 2.20%, respectively. In contrast, FOB China TOPCon modules continued to edge higher by 3.48% over the same period.

According to the China Nonferrous Metals Industry Association (CNMIA), sentiment in the wafer segment remained cautious this week, with upstream and downstream players locked in a stalemate. Despite continued price gains in cells and modules, driven by export tax rebate policy changes and rising silver prices, price increases have yet to effectively transmit upstream.

CNMIA noted that domestic end demand remains sluggish, and under cost pressure, cell manufacturers have become increasingly reluctant to accept high-priced wafers, resulting in few wafer procurement orders.

With downstream demand unlikely to recover meaningfully before the Lunar New Year, and polysilicon prices showing signs of softening, the wafer market is expected to stay weak in the near term, the association added.

Downstream sources added that higher production costs, combined with weak end-user module demand, could limit cell output levels in the longer term.

Market analysts have previously projected China’s installation demand to fall by over 20% in 2026, following the transition from feed-in-tariffs to a market-based electricity pricing mechanism. Furthermore, the planned removal of export tax rebates may weigh on overseas demand, reinforcing a bearish demand outlook for cells later this year, sources said.

OPIS, a Dow Jones company, provides energy prices, news, data, and analysis on gasoline, diesel, jet fuel, LPG/NGL, coal, metals, and chemicals, as well as renewable fuels and environmental commodities. It acquired pricing data assets from Singapore Solar Exchange in 2022 and now publishes the OPIS APAC Solar Weekly Report.

The UK-based perovskite solar PV specialist has announced a new metrology research project with Swansea University and a new development agreement with Renolit, a German plastic films, sheets and polymer solutions company.

Power Roll, a UK-based perovskite solar PV specialist, has announced a new metrology research project with Swansea University and a joint development agreement with Renolit, a German plastic films, sheets and polymer solutions company, which will begin with an outdoor field trial in Germany.

In the U.K., samples of Power Roll's patented flexible, micro-groove perovskite solar PV film will be provided to researchers at Swansea University and the National Physical Laboratory in a six-month feasibility project to support the development of inline and end-of-line testing tools for perovskite solar cells.

It also involves the development of stability guidelines for industry standards. Without these advancements, perovskite solar cell companies “could face significant hurdles in achieving product accreditation,” noted the company.

“The project will support scalable roll-to-roll manufacturing of lightweight perovskite PV, delivering commercial prototypes, testing protocols, and an invited academic review to strengthen UK capability in advanced semiconductor photovoltaics,” Nathan Hill, Power Roll Senior Scientist, told pv magazine.

It entails assessment of standards, metrology techniques, equipment, routes to characterize large scale devices and artificial intelligence (AI) pertaining to monitoring during manufacture.

In December, Renolit and Power Roll announced an 18-month joint development agreement that will begin with an outdoor trial of the UK company’s micro-groove perovskite prototypes on a Renolit building façade in Germany.

The initial deployment will be one to two square meters. There are plans to scale it up in size and power capacity as the project progresses, according to Hill.

“The purpose is to monitor and validate real-world performance and durability, and to understand the potential of the micro-groove solar technology,” Neil Spann, Power Roll CEO, told pv magazine.

Renolit has a commercial interest as a potential supplier of certain film layers to Power Roll, but also to explore integrating Power Roll's solar film into its existing building materials product lines, and to explore the potential of manufacturing under license in Europe, according to Spann.

Power Roll has also completed tests of smaller devices at its headquarters.

Renolit France, the French branch of the German company, recently launched a new PVC-based mounting product for rooftop PV systems.

Power Roll, founded in 2012, has proven its technology and manufacturing process, and secured 27 patent families.

Researchers in South Korea improved the performance of tin monosulfide (SnS) solar cells with a potassium fluoride-assisted post-treatment and a vapor transport deposition process. The treated solar cells had a power conversion efficiency of 4.10% and reduced recombination sites, compared to 3.42% for untreated devices.

Research led by Chonnam National University in South Korea has improved the performance of tin monosulfide (SnS) solar cells with a potassium fluoride-assisted (KF) post-treatment and a vapor transport deposition (VTD) process. The treated solar cells had a power conversion efficiency of 4.10% and reduced recombination sites, compared to control devices.

The research topic is complementary to the research group's earlier germanium oxide (GeOx) interlayer study, which achieved a 4.81% cell efficiency, according to first author of the research, Rahul Kumar Yadav.

“The KF treatment enhances the intrinsic quality of the SnS absorber surface, providing a superior foundation for subsequent interface engineering, while the GeO_x interlayer optimizes band alignment and suppresses recombination at the rear contact,” Kumar Yadav, told pv magazine.

“In our ongoing work, we are actively combining KF surface treatment with GeO_x back interface engineering, as we expect their integration to deliver further gains in voltage, operational stability, and overall device efficiency,” he added.

In the study, the researchers varied the concentration of KF solution to measure the effect of drop-cast KF surface treatment on the structural, morphological, and photovoltaic properties of VTD-SnS absorber layers.

Testing showed that the KF treatment enhanced “film uniformity, densification, and wettability.” Devices based on the optimized KF-treated SnS absorber had a PCE 4.10%, an improvement compared to 3.42% for untreated devices, with further analysis revealing reduced recombination sites.

“The KF-assisted solution post-treatment functions as a surface modulation step, improving grain connectivity, reducing surface roughness, and passivating electrically active defects,” said Kumar Yadav, adding that the resulting higher open-circuit voltage and fill factor, enabled enhanced efficiency “without altering the overall device architecture.”

The researchers concluded that the research represents a “scalable strategy to overcome key interfacial limitations” and to advance SnS thin-film photovoltaics.

Also participating in the study were Korea Aerospace University and Kyungpook National University.

The work is detailed in “Modulating surface morphology via potassium fluoride-assisted solution post-treatment enables VTD-SnS thin film solar cells to achieve over 4% efficiency,” which appears in Materials Today Energy.

Looking ahead, the group is focused on developing SnS thin-film solar cells beyond the 4% efficiency threshold “through coordinated absorber surface, heterojunction interface, and rear interface engineering, while maintaining compatibility with scalable manufacturing processes,” said Kumar Yadav.

The new Tesla Solar Panel and mounting system pairs with the company’s inverter, Powerwall battery, EV charging and vehicles, creating an all-Tesla residential solar offering for the first time.

From pv magazine USA

In the residential solar sector, the industry has long sought the “holy grail” of vertical integration, creating a single point of contact for hardware, software, and energy management.

While Tesla has been a dominant player in storage with the Powerwall, a market leader with its inverter, and in electric vehicles, the company has historically relied on third-party solar panels.

With the launch of the Tesla Solar Panel (TSP-415 and TSP-420), the company is closing that loop. The company’s new modules, assembled at its Gigafactory in Buffalo, New York, represent a significant shift toward a proprietary, integrated ecosystem designed to solve the common rooftop challenges of shading, aesthetic clutter, and installation friction.

“This panel completes the full package of the residential energy ecosystem,” Colby Hastings, senior director, Tesla Energy, told pv magazine USA. “It is based on our long history of innovation and engineering when it comes to solar.”

Domestic manufacturing

Tesla said the new modules are assembled at its Buffalo, NY facility, the same site where it continues to produce Solar Roof components, which inspired the design of the panel. The factory is currently scaling to an initial capacity of over 300 MW per year.

This domestic assembly allows Tesla to leverage federal manufacturing incentives while securing a local supply chain for its growing network of installers.

Power zones

The most technically significant departure from industry norms in the TSP series is the implementation of 18 independent “Power Zones.” Standard residential modules typically utilize three bypass diodes, creating six distinct zones. In traditional architectures, a single shadow from a chimney or vent pipe can effectively “shut down” large swaths of a string’s production.

Tesla’s design essentially triples the granularity of the module. By dividing the electrical architecture into 18 zones, the panel behaves more like a digital screen with a higher pixel count; if one “pixel” is shaded, the remaining 17 continue to harvest energy at near-peak efficiency.

While high-density substring architectures have been explored in the utility space, Tesla’s specific 18-zone layout is unique to the residential market, engineered to deliver optimizer-like performance without the added cost and potential failure points of module-level power electronics (MLPE) on the roof.

Inverters, batteries, and mounts

The TSP modules are designed to pair specifically with the Tesla Solar Inverter and Powerwall 3. While Tesla offers these as a unified “Home Energy Ecosystem,” they are not strictly sold as a single, inseparable bundle. However, the hardware is optimized to work as a package; for instance, the panel’s 18-zone design is specifically tuned to perform with Tesla’s string inverter technology.

Tesla is not keeping this technology exclusive to its own crews. While Tesla’s direct installation business leads the rollout, the package is available to Tesla’s network of over 1,000 certified installers.

This “installer-first” approach is further evidenced by the new Tesla Panel Mount. The new rail-less mounting system, made of black anodized aluminum alloy, uses the module frame itself as the structural rail.

By eliminating traditional rails and visible clamps, Tesla said the system is 33% faster to install. The mount sits closer to the roof and is enhanced by aesthetic front and side skirts, maintaining the “minimalist” look Tesla consumers expect.

Product specs

The modules are competitive with the current Tier 1 market, pushing into the 20% efficiency bracket while maintaining a robust mechanical profile, said the company.

 The new Tesla Solar Panels are now available nationwide. 

Solar roof 

For those wondering about the Tesla Solar Roof, the company maintains that the glass tile product remains a core part of its “premium” offering for customers needing a full roof replacement.

The cascading cell technology used in the new TSP modules, which overlaps cells to eliminate visible silver busbars, was originally designed in its Solar Roof product. Tesla is essentially taking the aesthetic and electrical innovations of its luxury roof product and integrating it into a traditional module form factor.

Virtual power plant

Tesla also highlighted the ability for virtual power plant (VPP) participation to increase value for its customers. VPPs coordinate the dispatch of energy stored in Powerwalls, acting as a distributed energy network. 

“We’re working more closely with utilities than ever to ensure that these assets participate in virtual power plants and support the grid and opening up new value streams, both for utilities and consumers that have these assets at home,” said Hastings. “We announced recently that we have a million Powerwalls deployed worldwide and 25% of those are enrolled in a virtual power plant program of some kind.”

Market strategy

The timing of this launch comes at a volatile moment for U.S. solar. With the passage of the “One Big Beautiful Bill” Act (OBBBA), the industry is navigating the early expiration of the 25D residential credit at the end of 2025 and the sunsetting of the 48E commercial credit.

Tesla’s move now is an opportunistic play for standardization and soft-cost reduction. By controlling the entire stack, Tesla can drive down customer acquisition and labor costs, which currently represent the largest portion of a system’s price tag.

“Utility rates across the country are going up, electricity is becoming increasingly unaffordable for homeowners,” said Hastings. “We’re still very bullish on the future of distributed energy here in the United States.”

The largest single-unit rooftop solar power plant in Europe, developed by French independent power producer Urbasolar, is under construction on the Delta 3 multimodal logistics platform in Dourges, in France’s Hauts-de-France region.

From pv magazine France

Longi, and Tongwei have predicted steep losses for fully fiscal year 2025, as persistent oversupply and falling solar module prices continue to pressure margins across China’s PV manufacturing sector.

Tongwei said it expects to post a net loss of CNY 9 billion ($1.29 billion) to RMB 10 billion for full fiscal year 2025. The polysilicon and module manufacturer said this loss is largely due to continued low pricing throughout the solar value chain, which has eroded margins, rising costs for key raw materials, and a persistent imbalance between supply and demand in the photovoltaic market. Tongwei posted a net loss of CNY 7.04 billion for 2024, down 152% from a net profit of CNY 13.58 billion in the preceding year, marking its first annual loss since listing.

Longi said it expects a net loss attributable to shareholders CNY 6 billion to CNY 6.5 billion for the fiscal year 2025. The company said the expected loss is mainly attributable to ongoing structural pressures in the photovoltaic industry — especially a persistent imbalance between supply and demand, which has kept solar product prices very low and intensified internal price competition. In 2024, the company posted a net loss of CNY 8.62 billion, down from a profit of CNY 10.75 billion in 2023, as annual revenue fell 36.2%. Longi also announced it signed a framework agreement with European distributor Brandmerchandising B.V. under which the partner will procure 300 MW of HPBC 2.0 high-efficiency modules.

JinkoSolar has announced distribution agreements totaling nearly 300 MW for its Tiger Neo 3 modules with Thailand-based UTI Energy, Solar Touch, JTN Energy, and IAN Solar, expanding its footprint in the Southeast Asian market. The company also announced its controlling subsidiary, Haining Jinko, plans to introduce strategic investors including Xingyin Asset Management and China Orient Asset Management through a capital increase of up to CNY 3.0bn ($412m) for a stake of no more than 24.68%. The proceeds will be used primarily to repay debt. JinkoSolar said it will waive its pre-emptive rights but retain an indirect holding of at least 68.94%, leaving control unchanged.

Trina Solar secured two supply agreements with ACWA Power covering utility-scale projects in Saudi Arabia. Trina will deliver 1.15 GW of modules for the Haden solar project and 900 MW of trackers for the 1.5 GW Al Khushaybi project. Both projects are scheduled for completion by July 2026, with grid connection planned for February 2027.

China Huadian Group has released its 2026 centralized PV module procurement tender, split into two lots of 6 GW and 2 GW, with minimum module efficiency requirements of 23.8% and 22.8%, respectively.

A research team from Osaka Metropolitan University have developed a donor-acceptor-donor molecule that can spontaneously self-assemble into nanoscale structures and offer a more stable route to built-in p/n heterojunctions in organic solar cells.

Scientists from Osaka Metropolitan University have developed a molecular architecture offering a new design strategy toward producing more efficient organic thin-film solar cells.

Their donor-acceptor-donor (DAD) molecule, known as TISQ, integrates a squaraine-based p-type segment and a naphthalene diimide n-type segment within a single molecule. It is capable of naturally forming p/n junctions, otherwise known as the interface between p-type and n-type semiconductors.

The two segments link via amide groups that promote hydrogen bonding, meaning TISQ can spontaneously self-assemble into distinct nanoscale structures, which the scientists believe could offer a more stable route to built-in p/n heterojunctions.

Takeshi Maeda, Associate Professor at the university's Graduate School of Engineering and lead author of the study, explained that depending on the solvent, TISQ can spontaneously organize into nanoparticle-like J-type or nanofiber-like H-type aggregates.

The university’s news release explains polar solvents cause TISQ to form nanoparticle-like J-type aggregates through a cooperative nucleation–elongation process, while low-polarity solvents see it assemble into fibrous H-type aggregates via an isodesmic mechanism. “Both show different electronic behaviors, especially in how efficiently they transport charges when light hits them,” Maeda said.

The team’s research fabricated organic thin-film solar cells incorporating TISQ as a single-component photoactive material in a test of device applicability. The molecule was shown to form nanoscale p/n heterojunctions through self-assembly, which the scientists say highlights the feasibility of molecular designs that autonomously organize into functional electronic structures.

With the power conversion efficiency of the fabricated cells remaining low, the team acknowledged further research is required before it is practically applied. Nevertheless, they concluded that their findings demonstrate how differences in self-assembled nanoscale p/n heterojunction structures directly influence the photocurrent response in a single-component system.

“Our focus is on developing molecular design strategies that use self-assembly to connect nanoscale p/n heterojunction structures with photoelectronic responses in single-component organic systems,” Maeda said. “By deepening this structure–function understanding, we aim to broaden the design space of organic thin-film solar cells and related optoelectronic materials.”

The new molecule is described in the research paper “Solvent-Controlled Supramolecular Polymerization and Morphology-Depended Photoconductivity Modulation in a Squaraine-Naphthalene Diimide-Squaraine Bulk p/n Heterojunction,” available in the journal Angewandte Chemie International Edition.

A Chinese-Swedish research team has boosted the performance of tin-lead perovskite solar cells by modifying additives and post-treatment processes. The device also demonstrated improved stability, retaining 60% of its initial efficiency after 550 hours at 85 °C under maximum power point conditions.

Researchers from East China Normal University and Sweden’s Linköping University have developed an alternative passivation method for tin-lead (Sn-Pb) perovskite solar cells that improves both efficiency and stability by avoiding the use of tin fluoride (SnF₂). The approach combines a lead fluoride (PbF₂) post-treatment with lead powder in the precursor.

“We identified and elucidated a previously unrecognized factor that drives the photo-thermal instability of Sn-Pb perovskite solar cells,” Wenxiao Zhang, co-first and co-corresponding author of the research told pv magazine, explaining that the study established that SnF₂ “parasitic reactions” trigger perovskite decomposition and degradation of functional device layers.

“Whereas the markedly lower stability of Sn-Pb perovskites relative to their Pb-only counterparts is usually ascribed solely to the oxidation of stannous ion (Sn²⁺), antioxidant strategies alone have failed to deliver a substantial improvement in photothermal durability. This work pinpoints the underlying cause and proposes an effective alternative,” said Zhang.

“To avoid the adverse effects of SnF₂ on stability and hole transport, we replace SnF₂ additive with lead powders, known for its antioxidant and crystallization-regulating effects as reported in our previous work, to remove Sn⁴⁺ from the precursor, combined with a PbF₂ post-treatment to passivate surface defects,” he went on to say.

The Sn-Pb test cells measured 0.09 cm2. The basic stack was as follows: indium tin oxide (ITO) substrate, P3CT-Cs layer, perovskite, lead fluoride, electron transport layer (ETL) based on buckminster fullerene (C60), bathocuproine (BCP) and insulating lithium fluoride (LiF), and copper (Cu) contacts.

The strategy enabled the efficiency of the SnF₂-free tin lead perovskite solar cell to reach 24.07% compared to 16.43% of the control device. As for photothermal stability, the cells without the SnF₂ additive retained 60% of their initial efficiency after continuous operation at 85 C under maximum power point (MPP) conditions for 550 h.

The negative effect of SnF₂e was evident in testing. For example, the researchers noted that both Cu and ITO electrodes had reactions “even at room temperature or without light soaking,” indicating the “corrodibility of migrated ion and reaction products.”

The fabrication requires precision but the process is straightforward, according to the scientists. “Tin-containing perovskites require a carefully controlled atmosphere with extremely low oxygen levels, and the film-forming temperature along with associated processing parameters must be finely tuned while using high-purity SnI₂. Even so, device fabrication remains straightforward,” said Zhang.

The scientists concluded that the work has implications for overcoming the stability bottlenecks of Sn-Pb single-junction and all-perovskite tandem solar cells. Their work is described in “A tin fluoride-free, efficient and durable tin-lead perovskite solar cell,” published by nature communications.

“We are working on the simultaneous efficiency and stability improvements of all-perovskite tandem solar cells and tin-lead perovskite solar cells,” said Zhang, referring to the future direction of the team's work.

In a new weekly update for pv magazine, OPIS, a Dow Jones company, provides a quick look at the main price trends in the global PV industry.

China’s TOPCon module prices rose for a third consecutive week, as market participants continued to digest the impacts of export rebates removal and higher cell prices. Beyond spot prices, prices along the forward curve have also edged higher, reflecting expectations that recent policy shifts could feed through to forward pricing.

According to the OPIS Global Solar Markets Report released on January 20, the Chinese Module Marker (CMM), the OPIS benchmark assessment for TOPCon modules from China, rose 12.75% on the week to $0.115/W Free-On-Board (FOB) China.

OPIS FOB China TOPCon module forward curve indications for Q2 2026 loading cargoes were assessed at $0.120/W, up 14.29% on the week. Forward prices for Q3 2026 loading cargoes moved higher to $0.121/W, rising 15.24% on the week.

Q4 2026 loading cargoes rose 10.42% week-on-week to $0.106/W while Q1 2027 loading cargoes saw the steepest increase of 13.5% to $0.109/W.

According to one tier-1 producer, silver prices will remain a key variable. Even if upstream polysilicon prices were to soften from April onward, module prices would struggle to fall back to end-2024 levels of around CNY0.70 ($0.10)/W as long as silver prices stay at current levels. The producer added that buyers have largely accepted the higher price levels and expect the uptrend to persist.

However, some trade sources pointed to a lingering “wait and see” sentiment in the market, largely driven by uncertainty around upcoming policies, particularly China’s anti-monopoly measures, which may be limiting the full transmission of recent price increases.

While these measures are primarily focused on the polysilicon segment and the proposed consolidation platform, downstream market participants told OPIS they could also have implications for cell and module markets, where major producers have been operating under strict production and sales coordination arrangements for over a year.

Several producer sources said this could unintentionally intensify production and price competition in an industry already grappling with significant overcapacity. However, they noted that clearer regulatory guidance would still be needed before manufacturers adjust their production and sales strategies.

In early January, the Beijing Municipal Administration for Market Regulation initiated a meeting with major polysilicon producers and the China Photovoltaic Industry Association to address monopoly risks and outline rectification requirements related to anti-monopoly compliance. The rectification measures are due to be submitted to the State Administration for Market Regulations (SAMR) by Jan. 20.

Under the proposed framework, companies are prohibited from reaching agreements on production capacity, utilization rates, sales volumes and pricing. Capital contribution ratios should not determine market allocation, output or profit distribution, and any form of coordination or communication on prices, costs, production and sale volumes is not allowed.

Meanwhile, high inventory levels and downstream oversupply remain a headwind, making it difficult to justify current price levels, sources said. One tier-1 producer noted that the cell and module segments are likely to remain challenging in 2026, noting that it is difficult to pinpoint a clear price ceiling amid ongoing policy uncertainty, while further price increases could also weigh on power plant investment decisions.

A developer source said uncertainty remains elevated, with any further price gains dependent on the market acceptance of current module prices. The source added that while suppliers continue to push for increases, it may be difficult for module prices to keep rising given current electricity tariffs, as most new PV projects are priced through market-based mechanisms rather than guaranteed feed-in tariffs (FiTs).

Major Chinese PV manufacturers are expected to release their financial results for 2025 in the coming weeks, with several already signalling another difficult year in 2025 amid oversupply across the value chain and persistently weak prices. Depressed module selling prices and tighter trade conditions have continued to squeeze margins, with some companies reporting wider losses in Q4 2025 versus Q3.

OPIS, a Dow Jones company, provides energy prices, news, data, and analysis on gasoline, diesel, jet fuel, LPG/NGL, coal, metals, and chemicals, as well as renewable fuels and environmental commodities. It acquired pricing data assets from Singapore Solar Exchange in 2022 and now publishes the OPIS APAC Solar Weekly Report.

With silver prices rising, more large solar manufacturers are expected to switch to copper for cell metallization. Radovan Kopecek of ISC Konstanz tells pv magazine that he expects the entire industry to follow. Ning Song of the University of New South Wales says a small efficiency tradeoff may be acceptable if the cost savings are significant and do not introduce new reliability risks.

The recent surge in silver prices has eased slightly, with prices per troy ounce now just below the all-time high of over $94 per troy ounce reached earlier this week. Following announcements by Chinese module manufacturer Longi announced that it is moving toward copper-based metallization, and by China-based metallization paste supplier DK Electronic Materials that a gigawatt-scale customer will adopt its high-copper paste for commercial production, 2026 could mark a key milestone in the PV industry’s phase-down of the costly metal.

“I do think that the industry will follow in those footsteps, as the PV industry is a ‘follower industry.” When the big players start with something, the others follow,” Radovan Kopecek, the co-founder and director of German research institute the International Solar Energy Research Center Konstanz (ISC Konstanz), told pv magazine. “An immediate transition to copper is technically and economically feasible. Copper screen printing can be implemented quickly, and we have received many inquiries about it.”

According to Kopecek, project developers are “absolutely” ready to embrace copper-metallized products, adding that when the technology is properly implemented, performance does not differ from that of silver-metallized modules. “However, I do not expect the industry to abandon silver completely,” he said. “Silver will remain at around 2 mg to 3 mg per watt, as it is still needed for firing through, as a diffusion barrier, and to establish contact with the emitter.”

Ning Song, from the University of New South Wales (UNSW) in Australia, explained that even if adopting a high-copper paste results in a small efficiency drop, the price trade-off should be acceptable to manufacturers. “That trade-off is acceptable if it does not introduce new reliability risks. Ultimately, the decision depends on how well the efficiency loss can be offset at the module and system level,” she told pv magazine.

Song's team is currently working to identify practical pathways to reduce silver usage in PV cells, both through incremental improvements to existing screen-printed metallization and longer-term exploration of alternative paste systems. “In the short term, aggressive silver thrifting within existing screen-printing processes is the most commercially ready option, as it minimizes disruption to current manufacturing lines,” she stated.

“From a purely technical perspective, the most promising long-term solution is the one that delivers the best combination of low contact resistance, minimal recombination losses at the contacts, high conductivity, sufficient ductility to enable narrow, well-shaped gridlines with reduced optical shading, and robust long-term reliability,” she said. “That is regardless of the specific metal used.”