Air fabrication of CsPbI perovskite photovoltaics has been attractive and fast-moving owing to its compatibility to low-cost and up-scalable fabrication. However, due to the inevitable erosions, undesirable traps are formed in air-fabricated CsPbI crystals and seriously hinder photovoltaic performance with poor reproduction. Here, 3, 5-difluorobenzoic acid hydrazide (FBJ) is incorporated as trap regulation against external erosions in air-fabricated CsPbI. Theoretical simulations reveal that FBJ molecules feature stronger absorbance on CsPbI than water, which can regulate trap formations for water erosions. In addition, FBJ with solid bonding interaction to CsPbI can enlarge formation energy of various defects during crystallization and further suppress traps. Moreover, profiling to reductive hydrazine groups, FBJ inhibits traps for oxidation erosions. Consequently, a champion efficiency of 19.27% with an impressive of 1.225 V is realized with the inverted CsPbI devices. Moreover, the optimized devices present superior stability and contain 97.4% after operating at 60 °C for 600 h.
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http://dx.doi.org/10.1021/acsami.2c07420 | DOI Listing |
Angew Chem Int Ed Engl
November 2024
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, 266590, PR China.
Chem Commun (Camb)
August 2024
Institute of Carbon Neutrality, College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, P. R. China.
Herein, we demonstrate that triacetyl resveratrol (TRES) can be employed as an antioxidant additive to suppress the formation of oxidation-induced defects in air-fabricated perovskite films. When assembling into carbon-based CsPbIBr and CsPbIBr cells, an enhanced efficiency of 10.38% and 14.
View Article and Find Full Text PDFACS Appl Mater Interfaces
July 2022
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
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