Diselenogermole as a novel donor monomer for low band gap polymers

Zhuping Fei, Raja Shahid Ashraf, Yang Han, Sarah Wang, Chin Pang Yau, Pabitra S. Tuladhar, Thomas D. Anthopoulos, Michael L. Chabinyc, Martin Heeney*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We report the synthesis of a new diseleno[3,2-b:2′,3′-d]germole (DSG) monomer containing branched 2-ethylhexyl sidechains on the bridging germanium group. The utility of this new electron rich monomer is explored by co-polymerisation of a distannylated DSG monomer with N-octylthienopyrrolodione to afford a soluble low band gap polymer. The DSG containing polymer shows a broader and more red-shifted absorption spectrum compared its thiophene analogue. Polymer solar cells are fabricated from blends with PC71BM exhibiting initial power conversion efficiencies of 5.2% in inverted bulk heterojunction solar cells.

Original languageEnglish (US)
Pages (from-to)1986-1994
Number of pages9
JournalJournal of Materials Chemistry A
Volume3
Issue number5
DOIs
StatePublished - Feb 7 2015

ASJC Scopus subject areas

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

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