Diselenogermole as a novel donor monomer for low band gap polymers. Issue 5 (8th December 2014)

• Record Type: Journal Article
• Authors: Fei, Zhuping; Ashraf, Raja Shahid; Han, Yang; Wang, Sarah; Yau, Chin Pang; Tuladhar, Pabitra S.; Anthopoulos, Thomas D.; Chabinyc, Michael L.; Heeney, Martin
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 5(2015)
• Page Start: 1986
• Page End: 1994
• Publication Date: 2014-12-08
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c4ta05703a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Soluble co-polymers of the fused selenophene monomer, DSG, with N -octylthienopyrrolodione are reported. Polymer solar cells fabricated from blends with PC71 BM exhibit promising performance in inverted bulk heterojunction solar cells 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 PC71 BM exhibiting initial power conversion efficiencies of 5.2% in inverted bulk heterojunction solar cells.