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

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


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
Issue number5
StatePublished - Feb 7 2015
Externally publishedYes


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