Distannylated Bithiophene Imide: Enabling High-Performance n-Type Polymer Semiconductors with an Acceptor-Acceptor Backbone
- Authors
- Shi, Yongqiang; Guo, Han; Huang, Jiachen; Zhang, Xianhe; Wu, Ziang; Yang, Kun; Zhang, Yujie; Feng, Kui; Woo, Han Young; Ortiz, Rocio Ponce; Zhou, Ming; Guo, Xugang
- Issue Date
- 17-8월-2020
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- all-polymer solar cells; n-type acceptor-acceptor polymers; organic thin-film transistors; polymer molecular weight; stannylated bithiophene imide
- Citation
- ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.59, no.34, pp.14449 - 14457
- Indexed
- SCIE
SCOPUS
- Journal Title
- ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
- Volume
- 59
- Number
- 34
- Start Page
- 14449
- End Page
- 14457
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/53754
- DOI
- 10.1002/anie.202002292
- ISSN
- 1433-7851
- Abstract
- A distannylated electron-deficient bithiophene imide (BTI-Tin) monomer was synthesized and polymerized with imide-functionalized co-units to afford homopolymer PBTI and copolymer P(BTI-BTI2), both featuring an acceptor-acceptor backbone with high molecular weight. Both polymers exhibited excellent unipolar n-type character in transistors with electron mobility up to 2.60 cm(2) V-1 s(-1). When applied as acceptor materials in all-polymer solar cells, PBTI and P(BTI-BTI2) achieved high power-conversion efficiency (PCE) of 6.67 % and 8.61 %, respectively. The PCE (6.67 %) of polymer PBTI, synthesized from the distannylated monomer, is much higher than that (0.14 %) of the same polymer PBTI*, synthesized from typical dibrominated monomer. The 8.61 % PCE of copolymer P(BTI-BTI2) is also higher than those (<1 %) of homopolymers synthesized from dibrominated monomers. The results demonstrate the success of BTI-Tin for accessing n-type polymers with greatly improved device performance.
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