Scientists build bifacial CIS solar cell with record efficiency, power density
Researchers in South Korea have demonstrated a lower temperature process for bifacial copper, indium, selenium (CuInSe₂) solar cells with a rear-side efficiency of 8.44% and 15.30% on the front. The device has been developed for applications in tandem solar cells.
Perovskite rollout gathers pace
Perovskite’s growing visibility at industry events in 2025 is a sign that perovskites have progressed beyond the small lab-made devices seen earlier this decade. The focus is now on developing materials, processes, and a supply chain ready for large-scale manufacturing and deployment.
Four-year outdoor testing shows perovskite cells suffer from high seasonality
Testing conducted by the Helmholtz-Zentrum Berlin in Germany has shown that perovskite solar cells operating at high latitudes in Europe may suffer from higher performance losses in winter compared to conventional PV devices. The scientists warned, however, that at lower latitudes this seasonality may be less pronounced.
Indian scientists build 29.14%-efficient tandem solar cell with inverted top perovskite device
The researchers said they optimized the low-bandgap inverted perovskite cells through a passivating aluminum oxide (Al2O3) interlayer deposited via atomic layer deposition (ALD), which significantly helped improve device efficiency.
Perovksite-TOPCon tandem solar cell based on self-assembled monolayer achieves 31.1% efficiency
Researchers in China have fabricated a perovskite-TOPCon solar cell with a top perovskite device utilising a self-assembled monolayer aimed to improved cell stability. The tandem cell achieved a high fill factor and a certified efficiency of 30.9%.
Sekisui, TNO exploring perovskite solar PV collaboration
Japan’s Sekisui Solar Film and the Netherlands’ TNO have signed a letter of intent to explore collaborations related to flexible perovskite solar PV. Talks will be initiated on a potential perovskite module factory in Brabant and the exchange of relevant information.
Perovskite tandem provider integrates with existing solar manufacturing lines
While many perovskite developers pursue a 2-terminal format, which poses design and production constraints, Caelux uses a 4-terminal approach that bypasses technical challenges.
Scientists unveil durable perovskite PV modules with carbon nanotube electrode
Japanese researchers have engineered a 100 cm² perovskite solar cell module featuring a robust single-walled carbon nanotube (CNT) electrode to improve durability and enable dual-sided light absorption.
Indian scientists design 31.16%-efficient 2D-3D perovskite solar cell
Scientists in India have simulated a novel perovskite solar cell that combinies a Dion-Jacobson 2D layer with a 3D halide perovskite. The design showed improved stability compared to reference cells without the DJ-2D layer.
Chinese researchers build 4T perovskite-CIGS tandem solar cell with 29.36% efficiency
Scientists in China built a four-terminal perovskite-CIGS tandem solar cell based on a top semi-transparent perovskite device with an efficiency of 21.26% and a high bifaciality factor of 92.2%. They used a solvent-annealing strategy to produce a perovskite film with full coverage, larger grains, superior crystallinity and free of detectable lead iodide impurity.
