Fluorination-Induced Conversion of the Quasi- to the Normal Interchain Packing in Push-Pull Conjugated Polymer Aggregates
- 주제(기타) Polymer Science
- 설명문(일반) [Yun, Hyuk Gu; Lee, Dongki] Sejong Univ, Dept Nanotechnol & Adv Mat Engn, Seoul 05006, South Korea; [Nho, Hak-Won; Kwon, Oh-Hoon] Ulsan Natl Inst Sci & Technol UNIST, Dept Chem, Ulsan 44919, South Korea; [Nho, Hak-Won; Kwon, Oh-Hoon] Inst Basic Sci IBS, Ctr Soft & Living Matter, Ulsan 44919, South Korea; [Han, Se Gyo; Jeong, Minyoung; Hwang, Hyeongjin; Rho, Junsuk; Cho, Kilwon] Pohang Univ Sci & Technol, Dept Chem Engn, Pohang 37673, South Korea; [Mun, Jungho; Noh, Jaebum; Rho, Junsuk] Pohang Univ Sci & Technol, Dept Mech Engn, Pohang 37673, South Korea; [Cho, Jun Sang; Jang, Joon I.] Sogang Univ, Dept Phys, Seoul 04107, South Korea; [Bang, Jieun; Park, Jaehong] Ewha Womans Univ, Dept Chem & Nanosci, Seoul 03760, South Korea; [Yoon, Tae Woong; Kang, Boseok] Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol SAINT, Suwon 16419, South Korea; [Kang, Boseok] Sungkyunkwan Univ, Dept Nano Engn, Suwon 16419, South Korea; [Kim, Dong Hyeon; Kim, Bora] Sungkyunkwan Univ, Dept Energy Sci, Suwon 16419, South Korea; [Kim, Dong Hyeon; Jeong, Mun Seok] Hanyang Univ HYU, Dept Phys, Seoul 04763, South Korea; [Lee, Hansol] Gachon Univ, Dept Chem & Biol Engn, Seongnam 13120, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2023
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000211633
- 본문언어 영어
- Published As https://doi.org/10.1021/acs.macromol.3c00995
초록/요약
We investigated the chain-length and fluorination effects on photophysics within push-pull conjugated polymer (CP, M-w 40k/100k PBDB-T and M-w 100k PM6) aggregates using transient absorption spectroscopy. Our findings reveal that J-type excitons were more induced in relatively ordered domains than in disordered domains of PBDB-T. Interestingly, the ordered domains of M-w 100k PBDB-T aggregates induce interchain packing with localized chain cross-linked points, referred to as quasi-interchain packing, due to chain folding and increased intrachain rigidity. Two fluorination effects were observed in the PM6 aggregates. First, the intrachain rigidity decreased in the PM6 film compared to the PBDB-T films. Second, the formation of localized chain cross-linked points was suppressed in the ordered domains, resulting in the conversion of the quasi- to the normal interchain packing and the enhanced H-type excitonic couplings. Our findings provide new insights into the exciton dynamics study in CP aggregates and the bulk-heterojunction blends of polymer solar cells.
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