Efficient and stable solution-processed planar perovskite solar cells via contact passivation
Hairen Tan, Ankit Jain, Oleksandr Voznyy, Xinzheng Lan, F. Pelayo Garcı́a de Arquer, James Z. Fan, Rafael Quintero‐Bermudez, Mingjian Yuan, Bo Zhang, Yicheng Zhao, Fengjia Fan, Peicheng Li, Li Na Quan, Yongbiao Zhao, Zheng‐Hong Lu, Zhenyu Yang, Sjoerd Hoogland, Edward H. Sargent
Abstract
colloidal nanocrystal film that mitigates interfacial recombination and improves interface binding in low-temperature planar solar cells. We fabricated solar cells with certified efficiencies of 20.1 and 19.5% for active areas of 0.049 and 1.1 square centimeters, respectively, achieved via low-temperature solution processing. Solar cells with efficiency greater than 20% retained 90% (97% after dark recovery) of their initial performance after 500 hours of continuous room-temperature operation at their maximum power point under 1-sun illumination (where 1 sun is defined as the standard illumination at AM1.5, or 1 kilowatt/square meter).