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

Fanqi Meng, Kuan Liu, Shuixing Dai, Jiangjian Shi, Huiyin Zhang, Xin Xu, Dongmei Li, Xiaowei Zhan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

42 Citations (Scopus)

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 J-V curves of the modified devices are also improved compared to those of the control devices.

Original languageEnglish
Pages (from-to)1079-1086
Number of pages8
JournalMaterials Chemistry Frontiers
Volume1
Issue number6
DOIs
Publication statusPublished - Jun 2017

ASJC Scopus subject areas

  • Materials Science(all)
  • Materials Chemistry

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