Scalable Ambient Fabrication of High-Performance CsPbI2Br Solar Cells

Yuanyuan Fan, Junjie Fang, Xiaoming Chang, Ming-Chun Tang, Dounya Barrit, Zhuo Xu, Zhiwu Jiang, Jialun Wen, Huan Zhao, Tianqi Niu, Detlef M. Smilgies, Shengye Jin, Zhike Liu, Er Qiang Li, Aram Amassian, Shengzhong (Frank) Liu, Kui Zhao

Research output: Contribution to journalArticlepeer-review

113 Scopus citations


All-inorganic halide perovskites hold promise for improving the thermal stability of perovskite solar cells (PSCs), but their moisture sensitivity significantly limits scalable fabrication of high-quality thin films over large areas under ambient conditions. Upscaling of uniform and pinhole-free coatings is further complicated by the fluid dynamics of the ink and its solidification mechanisms. For the first time, we demonstrate the control of film formation during ambient-air scalable fabrication of CsPbI2Br perovskite films using blade coating and investigate the coupling between the fluid dynamics and the structural evolution during film formation. As a result, we achieve power conversion efficiencies of 14.7% (aperture, 0.03 cm2) and 12.5% (aperture, 1.0 cm2), which is the highest performance for 1.0 cm2 all-inorganic PSCs. These results present important lessons on controlling the solidification of inks for the practical fabrication of perovskite photovoltaics.
Original languageEnglish (US)
Pages (from-to)2485-2502
Number of pages18
Issue number10
StatePublished - Aug 15 2019


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