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Efficient and stable planar perovskite solar cells with carbon quantum dots doped PCBM electron transport layer

Abstract

Perovskite solar cell with single light absorption heterojunction has demonstrated power conversion efficiency as high as 23.2% in the past few years. In this work, for the first time, we use quasi-spherical carbon quantum dots (CQDs) doped PCBM film as electron transporting layer of inverted perovskite solar cell. The structure is FTO/PEDOT: PSS/MAPbI3/PCBM: CQDs/BCP/Ag. The optimized PCE of 18.1% is achieved and a 13% enhancement has observed compared to that of pure PCBM-based devices. Various advanced characterizations including ultrafast spectroscopy, conductive atomic force microscopy and electronic impedance spectroscopy elucidate that quasi-spherical CQDs doping leads to enhanced electrical conductivity, electron mobility and charge extraction efficiency. Moreover, we find that such CQDs doping help prevent I- ions from interface diffusing and thus enhance the stability of solar cells.

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Supplementary files

Publication details

The article was received on 05 Dec 2018, accepted on 08 Apr 2019 and first published on 09 Apr 2019


Article type: Paper
DOI: 10.1039/C8NJ06146G
Citation: New J. Chem., 2019, Accepted Manuscript

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    Efficient and stable planar perovskite solar cells with carbon quantum dots doped PCBM electron transport layer

    X. Zhu, J. Sun, S. Yuan, N. Li, Z. Qiu, J. Jia, Y. Liu, J. Dong, P. Lv and B. Cao, New J. Chem., 2019, Accepted Manuscript , DOI: 10.1039/C8NJ06146G

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