A comparative study on the thermal- and microwave-assisted Stille coupling polymerization of a benzodithiophene-based donor–acceptor polymer (PTB7)
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SCOPUS
- Title
- A comparative study on the thermal- and microwave-assisted Stille coupling polymerization of a benzodithiophene-based donor–acceptor polymer (PTB7)
- Authors
- Michael Ruby Raj; Kim, Minjun; Kim,Hong Il; Lee, Gang-Young; Park, Cheol Woong; PARK, TAIHO
- Date Issued
- 2017-01
- 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
- https://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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