Three-dimensional molecular donors combined with polymeric acceptors for high performance fullerene-free organic photovoltaic devices

Shi Yong Liu, Jae Woong Jung, Chang Zhi Li, Jiang Huang, Jianyuan Zhang, Hongzheng Chen, Alex K.Y. Jen

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Non-fullerene acceptor based organic photovoltaic devices (OPVs) reported so far are inferior to those derived from fullerenes. This increases the speculation on whether donors need to be tailored for advancing non-fullerene OPVs. We explored herein two direct arylation-derived diketopyrrolopyrrole (DPP)-based three-dimensional (3D) donors that can deliver respectable power conversion efficiencies (PCEs) of 4.64% and 4.02% with polymeric acceptor N2200 blends, surpassing those obtained from PC71BM (3.56% and 3.22%, respectively). It is found that these 3D-shaped molecular donors can yield improved photo-to-current conversion and balanced charge transport when blending with the linear N2200 polymer. This finding suggests that engineering molecular geometry can be a promising approach for developing high-performance materials.

Original languageEnglish (US)
Pages (from-to)22162-22169
Number of pages8
JournalJournal of Materials Chemistry A
Volume3
Issue number44
DOIs
StatePublished - Sep 15 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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