Issue 6, 2017

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

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

Supplementary files

Article information

Article type
Research Article
Submitted
10 nov 2016
Accepted
13 dec 2016
First published
14 dec 2016

Mater. Chem. Front., 2017,1, 1079-1086

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, 1, 1079 DOI: 10.1039/C6QM00309E

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