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A comparative study on the thermal- and microwave-assisted Stille coupling polymerization of a benzodithiophene-based donor–acceptor polymer (PTB7)

Title
A comparative study on the thermal- and microwave-assisted Stille coupling polymerization of a benzodithiophene-based donor–acceptor polymer (PTB7)
Authors
Michael Ruby RajKim, MinjunKim,Hong IlLee, Gang-YoungPark, Cheol WoongPARK, TAIHO
POSTECH Authors
PARK, TAIHO
Date Issued
Jan-2017
Publisher
ROYAL SOC CHEMISTRY
Abstract
We report a comparative study on the thermal-and microwave-assisted Stille-coupling polymerization of a benzodithiophene-based donor-acceptor polymer (PTB7). For this study, we synthesized PTB7 polymers through Stille-coupling polymerization under microwave conditions (M-PTB7, M-n = 75 kg mol(-1), and D = 2.2) as well as thermal conditions (T-PTB7, M-n = 31 kg mol(-1), D = 2.1). Although the microwave-assisted method increases the molecular weight of PTB7 in a short time, the power conversion efficiency of MPTB7 (2.8%) is lower than that of T-PTB7 (7.8%). The microwave-assisted method was found to generate more structural defects from homo-coupling side reactions, resulting in a decrease in J(SC) and FF values for M-PTB7. Our findings highlight the importance of controlling the generation of homocoupled units during the synthesis of PTB7 polymers for high-performance PSCs.
URI
http://oasis.postech.ac.kr/handle/2014.oak/39208
DOI
10.1039/c6ta09212h
ISSN
2050-7488
Article Type
Article
Citation
Journal of Materials Chemistry A, vol. 5, no. 7, page. 3330 - 3335, 2017-01
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박태호PARK, TAI HO
Dept. of Chemical Enginrg
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