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Research & Development
Scientists build 31%-efficient indium-free tandem perovskite silicon mini-module via reactive plasma deposition Researchers have developed an indium-free perovskite-silicon tandem solar cell using a low-damage reactive plasma deposition process to produce tin oxide layers, achieving certified efficiencies of 33.6% for a small-area device and 31.0% for a mini-module.
Ev Foley
Jul 17, 2026
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Research & Development
Qcells secures TÜV Rheinland certification for perovskite-silicon tandem solar tech The certified devices were manufactured on the company’s German pilot line, building on its record 28.6%-efficient tandem cell and ongoing efforts to scale mass production.
Emiliano Bellini
Jul 16, 2026
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Research & Development
Pilot tests show vertical PV with specular reflectors delivers 51% higher yield FutureVoltaics’ VectHor5 vertical PV system with specular reflectors delivered a 51.4% higher specific yield than a conventional fixed-tilt reference system in a five-month pilot project in Spain. The company says the technology extends daily production hours and improves the economic value of solar generation.
Pilar Sánchez Molina
Jul 15, 2026
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Research & Development
ISC Konstanz study highlights atomic layer deposition as a superior approach for TOPCon UV stability Researchers at ISC Konstanz found that ALD-based aluminum oxide (AlOx) passivation layers provide better UV stability for TOPCon solar cells than PECVD-deposited layers, with thicker AlOx films and a thermally grown SiOx interlayer further improving resistance to UV-induced degradation. Testing laboratory and commercial TOPCon cells showed 2–3% average efficiency losses after high UV exposure, while process variations and layer non-uniformities were identified as key factors influencing long-term UV susceptibility.
Emiliano Bellini
Jul 15, 2026
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Research & Development
Longi sets new world record with 35.5%-efficient perovskite-silicon tandem cell The result was certified by the European Solar Test Installation (ESTI).
Vincent Shaw
Jul 15, 2026
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Research & Development
Chinese scientists achieve world record efficiency of 28.04% for perovksite-organic tandem solar cell Researchers at the Chinese Academy of Sciences have reported a perovskite–organic tandem solar cell with a claimed record efficiency of 28.04%, using a photo-transformable TDB molecule to improve perovskite film quality and device stability.
Emiliano Bellini
Jul 15, 2026
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Research & Development
Triple-junction all-perovskite solar cell based on graphene oxide bilayer achieves 27.3% efficiency An international research team developed a triple-junction all-perovskite solar cell using a graphene oxide (GO)/self-assembled monolayer (SAM) bilayer contact strategy to overcome SAM-related charge extraction losses and improve interface quality.
Emiliano Bellini
Jul 13, 2026
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Research & Development
Laser-patterned poly-Si finger contacts reduce parasitic absorption, improve efficiency in TOPCon solar cells Researchers in China developed a laser-assisted poly-Si finger contact fabrication method combining picosecond laser modification and potassium hydroxide wet etching to reduce parasitic absorption in industrial TOPCon solar cells. The optimized process achieved a certified efficiency of 26.08% by improving optical performance while maintaining effective passivation and carrier transport.
Emiliano Bellini
Jul 10, 2026
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Research & Development
TÜV NORD study finds back-contact advantage over TOPCon is limited to mild shading conditions A TÜV NORD study found that back-contact (BC) modules outperform TOPCon modules under mild partial shading, particularly when three or fewer cells are shaded across different substrings within a string. However, once shading exceeds four cells, the performance advantage disappears, with both technologies experiencing similar power losses of around 50%.
Emiliano Bellini
Jul 08, 2026