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- W2989219056 startingPage "135197" @default.
- W2989219056 abstract "Electron transport layer (ETL), promoting electron transportation and electron extraction, is an essential component of high efficiency perovskite solar cells (PVSCs). SnO2 has been proved to be an excellent ETL for efficient PVSCs due to its good optical transparency, high electrical conductivity, and suitable band position. In this work, we develop low temperature solution-processable SnO2 thin film modified by Bi2O2S nanoparticles as effective ETL of PVSCs for the first time. The results show the modification of the Bi2O2S nanoparticles can passivate oxygen vacancies of SnO2 thin film, resulting in less charge recombination and improved charge transport. Furthermore, SnO2 thin film modified by Bi2O2S nanoparticles enhances film morphology of overlying perovskite active layer, including larger grain size, better crystallinity. These eventually result in a remarkable improvement of performance of PVSCs. Compared to PVSCs with pristine SnO2 as ETL, the power conversion efficiency (PCE) of PVSCs with SnO2 modified by optimized Bi2O2S nanoparticles as ETL is raised to 17.13% from 14.61% with suppressed hysteresis. In addition, the modification of Bi2O2S can slightly enhance the stability of PVSCs due to reduced oxygen vacancies of SnO2 and better crystallinity of perovskite film. This work not only provides an effective mean of surface modification of SnO2, but also shows the Bi2O2S material has potential for applications for PVSCs." @default.
- W2989219056 created "2019-11-22" @default.
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- W2989219056 date "2020-01-01" @default.
- W2989219056 modified "2023-10-16" @default.
- W2989219056 title "The low temperature solution-processable SnO2 modified by Bi2O2S as an efficient electron transport layer for perovskite solar cells" @default.
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- W2989219056 doi "https://doi.org/10.1016/j.electacta.2019.135197" @default.
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