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Korean scientists build shingled solar module for thermoelectric generators
Researchers at the Korea Institute of Energy Research developed a shingled photovoltaic module designed for efficient integration with thermoelectric generators (TEGs) to harvest waste heat via the Seebeck effect.
The series-connected strip architecture enables high-voltage, low-current operation that reduces TEG resistance losses, achieving scalable, load-resilient PV–TEG systems with improved efficiency and reliability.
Jun 17, 2026
Satellite breakthrough enables accurate panel-scale temperature mapping for solar farms
A Chinese research team has developed a scene-aware panel surface temperature (PST) retrieval model for utility-scale photovoltaic (PV) plants using MODIS thermal infrared satellite data. The method corrects for mixed-pixel effects, array geometry, and PV-specific directional emissivity to enable accurate panel-scale temperature estimation from space.
Scientists build PEDOT:PSS-free all-perovskite tandem solar cell with 29.1% efficiency
PEDOT:PSS is commonly used as a hole transport layer in perovskite solar cells because it combines high transparency, good conductivity, and suitable energy-level alignment, but its moisture sensitivity and acidity can damage perovskite layers and limit long-term stability. In contrast, replacing it with a phenothiazine-based self-assembled monolayer allows better interfacial control during crystallization, lowers defect densities, and enables highly efficient all-perovskite tandem devices with a reported efficiency of 29.1%.
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Pseudo-planar heterojunction organic solar cell achieves world record efficiency of 20.21%
Scientists have created pseudo-planar heterojunction organic solar cells with one of the highest efficiency scores ever for that structure. To do so, they had to overcome solvent-induced swelling and erosion of the donor. Their solution: a novel interfacial buffering strategy.
Chinese scientists identify degradation pathways in low-silver heterojunction solar cells
Researchers investigated thermal aging in silver-coated copper electrodes for heterojunction solar cells, finding that silver-copper interdiffusion significantly increases contact resistance and degrades electrical performance. The study links microstructural evolution to a shift from sintering-enhanced conductivity to defect-driven network breakdown, providing guidance for improving long-term metallization reliability.
Longi unveils 27.27%-efficient heterojunction back-contact solar cell built with improved laser processing
Researchers from Longi and Yangzhou University developed a laser-based manufacturing strategy to mitigate shock-wave-induced damage in HJT back-contact solar cells, improving passivation stability and device performance. The approach yields a certified 27.27% efficient solar cell and provides an industrially viable pathway toward ultra-high-efficiency photovoltaic fabrication.
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Fraunhofer ISE achieves 34.4 efficiency for III-V germanium solar module
Fraunhofer ISE has raised the efficiency of its record-breaking III-V germanium solar module from 34.2% to 34.4%, using shingle-matrix technology combined with space-grade solar cells. The advance builds on adapted triple-junction cells from Azur Space and a new interconnection method that improves area utilization by reducing shading and eliminating metal ribbons.
One-year outdoor testing reveals degradation paths in perovskite tandem solar cells
Researchers from TNO and Fraunhofer ISE ran a 1-year outdoor test of perovskite/perovskite/silicon triple-junction solar cells and found a clear efficiency decline from 17–18% to 13–14% driven by multi-stage degradation. The main failure mechanisms were voltage loss, encapsulation delamination, and UV/thermal-induced interface and transport-layer degradation rather than intrinsic absorber instability.
Study finds tandem PV has 30% lower environmental impact than crystalline silicon
A Spanish research team conducted a cradle-to-gate LCA of eight PV technologies across three generations, finding that tandem solar cells can outperform silicon-based systems in environmental terms due to higher efficiencies. However, cadmium telluride thin-film technologies still show the lowest overall impacts, while tandem systems require long lifetimes and improved stability to deliver clear sustainability advantages over established PV technologies.
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