Energy · 2009

Perovskite solar cell

A cheap, solution-processed crystal leaps from 3.8% to over 26% efficiency.

Akihiro Kojima and Tsutomu Miyasaka reported perovskite cells at 3.8% in 2009. Solid-state versions from 2012 improved faster than any photovoltaic material in history, passing 26% for single junctions by 2024, though long-term stability remains the hurdle.

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