Researchers in China have improved interface engineering in perovskite-silicon solar cells by using industrially textured silicon. The result is a highly efficienct tandem device that also showed remarkable stability.
France’s CEA-INES and WattByWatt, a Canadian startup, announced a 9 cm2 tandem perovskite-silicon PV cell with an efficiency of 28%, the result of an ongoing research collaboration.
China’s Trina Solar has unveiled a perovskite‑silicon tandem solar module prototype delivering 841 W and 27.1% efficiency, based on 210 mm tandem cells.
Researchers in the Middle East claim to have identified the optimal parameters for the commercial production of perovskite-silicon tandem solar modules across several locations. Their analysis showed that manufacturing costs may currently be as low as $0.387/W, with the prospect of reaching $0.25/W in seven years.
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.
The King Abdullah University of Science and Technology and the Fraunhofer Institute for Solar Energy Systems report producing perovskite-silicon tandem solar cells with open-circuit voltages exceeding 1.9 V as the result of a two-step hybrid evaporated/blade-coated process for perovskite films.
GCL Optoelectronics has achieved 29.51% efficiency for its perovskite-silicon tandem solar module, with the result certified by China’s National Institute of Metrology.
Researchers in China have fabricated a perovskite-TOPCon solar cell with a top perovskite device utilizing a self-assembled monolayer aimed to improved cell stability. The tandem cell achieved a high fill factor and a certified efficiency of 30.9%.
The tandem device is based on a bottom thin-film heterojunction cell that can bend and a top perovskite cell that can be manufactured with a low-temperature process to prevent damage. It achieved the highest efficiency ever recorded to date for a flexible perovskite-silicon tandem solar cell.
The result was confirmed by the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL).
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