Researchers at the Tokyo City University have created a highly efficient and bendable tandem solar cell.
The innovative design, which combines a semi-transparent inverted perovskite top cell with a flexible thin-film silicon heterojunction (HJT) bottom device, has reached a power conversion efficiency of 26.5%. As per the researchers, this is the highest-ever recorded conversion efficiency for a flexible perovskite-silicon tandem solar cell.
“Perovskite/silicon tandem solar cells are a novel class of solar cells that have recently attracted increasing attention due to their notable efficiency; however, they inherently suffer from loss of flexibility,” said the researchers in a new study.
“In this study, we develop flexible perovskite/silicon tandem solar cells by fabricating perovskite solar cells atop bendable thin-crystalline silicon solar cells.”
Tested under standard illumination conditions, the cell also demonstrated an open-circuit voltage of 1.83 V, a short-circuit current density of 17.9 mA/cm², and a fill factor of 81.%.
This development could be beneficial for a wide range of applications, particularly in building-integrated photovoltaics (BIPV) and other areas requiring lightweight and flexible solar energy solutions.
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