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D-A Copolymers Based on a Pentacyclic Acceptor Unit and a 3,3′-Difluoro-2,2′-bithiophene for Solar Cells
A D-A copolymer, P2FBTTPTI, was developed by copolymerizing a pentacyclic acceptor unit, thieno[2′,3′:5,6]pyrido[3,4-g]thieno[3,2-c]isoquinoline-5,11(4 H,10 H)-dione(TPTI), with 3,3′-difluoro-2,2′-bithiophene(2 FBT). P2 FBTTPTI possessed a low highest occupied molecular orbital(HOMO) energy level(-5...
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Published in: | Chinese journal of polymer science 2017-12, Vol.35 (12), p.1457-1462 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | A D-A copolymer, P2FBTTPTI, was developed by copolymerizing a pentacyclic acceptor unit, thieno[2′,3′:5,6]pyrido[3,4-g]thieno[3,2-c]isoquinoline-5,11(4 H,10 H)-dione(TPTI), with 3,3′-difluoro-2,2′-bithiophene(2 FBT). P2 FBTTPTI possessed a low highest occupied molecular orbital(HOMO) energy level(-5.50 e V) and a good hole mobility(4.14 × 10^-4 cm^2·V^-1·s^-1). P2FBTTPTI:PC_(71)BM solar cells gave a decent power conversion efficiency(PCE) of 7.64% and a high open-circuit voltage(Voc) of 0.95 V. |
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ISSN: | 0256-7679 1439-6203 |
DOI: | 10.1007/s10118-017-1996-4 |