Ternary organic solar cells based on two compatible PDI-based acceptors with an enhanced power conversion efficiency

Kangkang Weng, Chao Li, Pengqing Bi, Hwa Sook Ryu, Yikun Guo, Xiaotao Hao, Dahui Zhao, Weiwei Li, Han Young Woo, Yanming Sun

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Ternary solar cells have been proven to be an effective way to increase the power conversion efficiency (PCE) of organic solar cells (OSCs). Up to now, research effort has mostly focused on fullerene derivatives and acceptor-donor-acceptor (A-D-A) type non-fullerene acceptor-based ternary solar cells, while perylene diimide (PDI)-based ternary devices have been rarely studied. In this contribution, we introduced a new type of ternary solar cell based on a PDI-based small-molecule acceptor (PBI-Por) and a polymer donor (PTB7-Th) with a third PDI-based polymer acceptor (PDI-V). The introduction of PDI-V into the ternary blends not only broadens the absorption of blend films but also increases the electron mobilities. As a result, a high efficiency of 9.43% was obtained for the ternary OSC, which is 20% higher than that of the binary OSC. Detailed studies indicate that PDI-V showed good compatibility with PBI-Por in the blend films, which demonstrates a promising way to fabricate high-performance PDI-based OSCs.

Original languageEnglish
Pages (from-to)3552-3557
Number of pages6
JournalJournal of Materials Chemistry A
Volume7
Issue number8
DOIs
Publication statusPublished - 2019 Jan 1

ASJC Scopus subject areas

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

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