Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 10, Issue 20, Pages 6826-6834Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.2c01431
Keywords
Perovskite solar cells; Poly(methyl vinyl ether-alt-maleic anhydride); SnO2; Flexible devices; Electron transport layer
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Funding
- Zhejiang Provincial Natural Science Foundation of China [LY21F040008, LY21E020011, LQ19E030020]
- Applied Basic Research Project of China National Textile and Apparel Council [J201801]
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This study introduces a novel strategy of using poly(methyl vinyl ether-alt-maleic anhydride) (PVEM) complexes with SnO2 to prepare organic-inorganic hybrid PVEM-SnO2 electron transport layer (ETL) for perovskite solar cells (PSCs). The PVEM-SnO2 ETL greatly improves the electron extraction and transportability, reduces the trap-state density of the perovskite film, and enhances the performance and stability of both rigid and flexible PSCs.
Organic-inorganic hybrid perovskite solar cells (PSCs) are the prime candidates for photovoltaic technologies due to their superior photoelectric performance and low-temperature processability. The electron transport layer (ETL) is one of the most significant compositions for preparing PSCs. Herein, we innovatively introduce a strategy of poly(methyl vinyl ether-alt-maleic anhydride) (PVEM) complexes with SnO2 to prepare an organic-inorganic hybrid PVEM-SnO2 ETL. The preparation of a dense PVEM-SnO2 ETL film with fewer defects and superior wetting property considerably increases the electron extraction and transportability and dramatically reduces the trap-state density of perovskite film. Correspondingly, the PCE of rigid PSCs based on PVEM-SnO2 increases to 19.86% with negligible hysteresis and better long-term stability. Meanwhile, by adding PVEM into SnO2, the flexible device demonstrates a remarkable PCE of 16.86% and exhibits outstanding bending durability.
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