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Issue 18, 2019
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Efficient and stable planar perovskite solar cells with carbon quantum dots-doped PCBM electron transport layer

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Abstract

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

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

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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
New J. Chem., 2019,43, 7130-7135

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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, 43, 7130
    DOI: 10.1039/C8NJ06146G

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