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Issue 5, 2016
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A heptacyclic acceptor unit developed for D–A copolymers used in polymer solar cells

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Abstract

Thiophene rings in the pentacyclic unit TPTI were replaced with thieno[3,2-b]thiophene moieties to produce a new fused-ring acceptor unit TTP. A D–A copolymer PBDTTTP was synthesized via copolymerizing TTP and benzo[1,2-b:4,5-b′]dithiophene (BDT). PBDTTTP possessed an optical bandgap of 2.11 eV, a deep HOMO level of −5.43 eV, and partial crystallinity. PBDTTTP:PC71BM solar cells gave a PCE of 5.53%, and the maximum Voc reached 1 V.

Graphical abstract: A heptacyclic acceptor unit developed for D–A copolymers used in polymer solar cells

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Supplementary files

Article information


Submitted
01 Nov 2015
Accepted
08 Dec 2015
First published
09 Dec 2015

Polym. Chem., 2016,7, 1027-1030
Article type
Communication

A heptacyclic acceptor unit developed for D–A copolymers used in polymer solar cells

J. Cao, L. Qian and L. Ding, Polym. Chem., 2016, 7, 1027
DOI: 10.1039/C5PY01761K

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