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An amino-substituted perylene diimide polymer for conventional perovskite solar cells

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Abstract

We design and synthesize an amino-functionalized conjugated polymer (PPDI-F3N) based on perylene diimide and use it as a multifunctional interfacial layer of TiO2/perovskite in conventional planar perovskite solar cells. The work function of TiO2 is modulated by PPDI-F3N to better align with the conduction band of the perovskite, leading to efficient charge extraction. PPDI-F3N can passivate the TiO2 surface to reduce the severe recombination loss and rapid degradation caused by oxygen vacancies on the UV-sensitive TiO2 surface. Moreover, modulated polarity of PPDI-F3N is beneficial to optimal perovskite crystallization and morphology. All these features contribute to a higher efficiency (18.3%) of the PSCs with the PPDI-F3N interlayer relative to the control devices without the interlayer (16.7%) as well as improved stability and a reduced hysteresis effect.

Graphical abstract: An amino-substituted perylene diimide polymer for conventional perovskite solar cells

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Publication details

The article was received on 15 May 2017, accepted on 24 Jun 2017 and first published on 26 Jun 2017


Article type: Research Article
DOI: 10.1039/C7QM00221A
Citation: Mater. Chem. Front., 2017, Advance Article
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    An amino-substituted perylene diimide polymer for conventional perovskite solar cells

    M. Zhang, T. Li, G. Zheng, L. Li, M. Qin, S. Zhang, H. Zhou and X. Zhan, Mater. Chem. Front., 2017, Advance Article , DOI: 10.1039/C7QM00221A

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