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A perylene diimide based polymer: a dual function interfacial material for efficient perovskite solar cells

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Abstract

An n-type semiconducting copolymer of perylene diimide and dithienothiophene (PPDIDTT) is used as a dual function interfacial layer to modify the surface of perovskite films in inverted perovskite solar cells. The PPDIDTT layer can remarkably passivate the surface trap states of perovskite through the formation of a Lewis adduct between the under-coordinated Pb in perovskite and S in the dithienothiophene unit of PPDIDTT, and also shows efficient charge extraction and transfer properties. The PPDIDTT modified devices exhibit a maximum power conversion efficiency of 16.5%, superior to that of the control devices without PPDIDTT (15.3%). In addition, the device stability and hysteresis in JV curves of the modified devices are also improved compared to those of the control devices.

Graphical abstract: A perylene diimide based polymer: a dual function interfacial material for efficient perovskite solar cells

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Publication details

The article was received on 10 Nov 2016, accepted on 13 Dec 2016 and first published on 14 Dec 2016


Article type: Research Article
DOI: 10.1039/C6QM00309E
Citation: Mater. Chem. Front., 2017, Advance Article
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    A perylene diimide based polymer: a dual function interfacial material for efficient perovskite solar cells

    F. Meng, K. Liu, S. Dai, J. Shi, H. Zhang, X. Xu, D. Li and X. Zhan, Mater. Chem. Front., 2017, Advance Article , DOI: 10.1039/C6QM00309E

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