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Dopant-Free and Low-cost molecular “Bee” Hole-Transporting Materials for Efficient and Stable Perovskite Solar Cells

Abstract

With the dramatic development of the power conversion efficiency (PCE) of perovskite solar cells (PSCs), device lifetime has become one of the extensive research interests and concerns. To enhance the device durability, developing dopant-free hole-transporting materials (HTMs) with high performance is a promising strategy. Herein, three new HTMs with N,N'-diphenyl-N,N'-di(m-tolyl)benzidine (TPD) core: TPD-4MeTPA, TPD-4MeOTPA and TPD-4EtCz are designed and synthesized, showing suitable energy levels and excellent film-formation property. PCEs of 15.28% was achieved based on pristine TPD-4MeOTPA as HTM, which is a little lower than p-doped 2,2',7,7'-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9'-spirobifluorene (spiro-OMeTAD)-based device (17.26%). Importantly, the devices based on new HTMs show relatively improved stability compared to devices based on spiro-OMeTAD when aged under ambient air with 30% relative humidity in the dark.

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Publication details

The article was received on 29 Aug 2017, accepted on 11 Oct 2017 and first published on 12 Oct 2017


Article type: Paper
DOI: 10.1039/C7TC03931J
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Dopant-Free and Low-cost molecular “Bee” Hole-Transporting Materials for Efficient and Stable Perovskite Solar Cells

    X. Liu, F. Zhang, Z. Liu, Y. Xiao, S. Wang and X. Li, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03931J

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