Issue 10, 2017

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

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

Supplementary files

Article information

Article type
Research Article
Submitted
15 May 2017
Accepted
24 Jun 2017
First published
26 Jun 2017

Mater. Chem. Front., 2017,1, 2078-2084

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, 1, 2078 DOI: 10.1039/C7QM00221A

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