Room-temperature synthesized SnO2 electron transport layers for efficient perovskite solar cells |
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| Authors: | Shengwei Shi Jing Li Tongle Bu Shili Yang Junyan Xiao Yong Peng Wei Li Jie Zhong Zhiliang Ku Yi-Bing Cheng Fuzhi Huang |
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| Affiliation: | State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070 PR China.; School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070 PR China ; Department of Materials Science and Engineering, Monash University, VIC 3800 Australia ; ARC Centre of Excellence in Exciton Science, Monash University, VIC 3800 Australia |
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| Abstract: | Tin oxide (SnO2) is widely used as electron transport layer (ETL) material in perovskite solar cells (PSCs). Numerous synthesis methods for SnO2 have been reported, but they all require a proper thermal treatment for the SnO2 ETLs. Herein we present a simple method to synthesize SnO2 nanoparticles (NPs) at room temperature. By using butyl acetate as a precipitator and a proper UV–Ozone treatment to remove Cl residuals, excellent SnO2 ETLs were obtained without any thermal annealing. The highest power conversion efficiency (PCE) of the prepared PSCs was 19.22% for reverse scan (RS) and 18.79% for forward scan (FS). Furthermore, flexible PSCs were fabricated with high PCEs of 15.27%/14.74% (RS/FS). The low energy consuming SnO2 ETLs therefore show great promise for the flexible PSCs'' commercialization.Room-temperature processed SnO2 as electron transport layer materials for efficient flexible perovskite solar cells. |
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