Fluorination-Induced Conversion of the Quasi- to the Normal Interchain Packing in Push-Pull Conjugated Polymer Aggregates

Hyuk Gu Yun; Hak Won Nho; Se Gyo Han; Jun Sang Cho; Jieun Bang; Tae Woong Yoon; Jungho Mun; Jaebum Noh; Minyoung Jeong; Dong Hyeon Kim; Bora Kim; Hyeongjin Hwang; Mun Seok Jeong; Hansol Lee; Junsuk Rho; Boseok Kang; Jae Hong Park; Joon I. Jang; Kilwon Cho; Oh Hoon Kwon; Dongki Lee

doi:10.1021/acs.macromol.3c00995

Fluorination-Induced Conversion of the Quasi- to the Normal Interchain Packing in Push-Pull Conjugated Polymer Aggregates

Hyuk Gu Yun, Hak Won Nho, Se Gyo Han, Jun Sang Cho, Jieun Bang, Tae Woong Yoon, Jungho Mun, Jaebum Noh, Minyoung Jeong, Dong Hyeon Kim, Bora Kim, Hyeongjin Hwang, Mun Seok Jeong, Hansol Lee, Junsuk Rho, Boseok Kang, Jae Hong Park, Joon I. Jang, Kilwon Cho, Oh Hoon KwonDongki Lee

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	7366-7378
Number of pages	13
Journal	Macromolecules
Volume	56
Issue number	18
DOIs	https://doi.org/10.1021/acs.macromol.3c00995
State	Published - 26 Sep 2023

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© 2023 American Chemical Society.

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Yun, H. G., Nho, H. W., Han, S. G., Cho, J. S., Bang, J., Yoon, T. W., Mun, J., Noh, J., Jeong, M., Kim, D. H., Kim, B., Hwang, H., Jeong, M. S., Lee, H., Rho, J., Kang, B., Park, J. H., Jang, J. I., Cho, K., ... Lee, D. (2023). Fluorination-Induced Conversion of the Quasi- to the Normal Interchain Packing in Push-Pull Conjugated Polymer Aggregates. Macromolecules, 56(18), 7366-7378. https://doi.org/10.1021/acs.macromol.3c00995

@article{cee0b48628b04cbabae9ff6d054199fc,

title = "Fluorination-Induced Conversion of the Quasi- to the Normal Interchain Packing in Push-Pull Conjugated Polymer Aggregates",

abstract = "We investigated the chain-length and fluorination effects on photophysics within push-pull conjugated polymer (CP, Mw 40k/100k PBDB-T and Mw 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 Mw 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.",

author = "Yun, {Hyuk Gu} and Nho, {Hak Won} and Han, {Se Gyo} and Cho, {Jun Sang} and Jieun Bang and Yoon, {Tae Woong} and Jungho Mun and Jaebum Noh and Minyoung Jeong and Kim, {Dong Hyeon} and Bora Kim and Hyeongjin Hwang and Jeong, {Mun Seok} and Hansol Lee and Junsuk Rho and Boseok Kang and Park, {Jae Hong} and Jang, {Joon I.} and Kilwon Cho and Kwon, {Oh Hoon} and Dongki Lee",

note = "Publisher Copyright: {\textcopyright} 2023 American Chemical Society.",

year = "2023",

month = sep,

day = "26",

doi = "10.1021/acs.macromol.3c00995",

language = "English",

volume = "56",

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Yun, HG, Nho, HW, Han, SG, Cho, JS, Bang, J, Yoon, TW, Mun, J, Noh, J, Jeong, M, Kim, DH, Kim, B, Hwang, H, Jeong, MS, Lee, H, Rho, J, Kang, B, Park, JH, Jang, JI, Cho, K, Kwon, OH & Lee, D 2023, 'Fluorination-Induced Conversion of the Quasi- to the Normal Interchain Packing in Push-Pull Conjugated Polymer Aggregates', Macromolecules, vol. 56, no. 18, pp. 7366-7378. https://doi.org/10.1021/acs.macromol.3c00995

TY - JOUR

T1 - Fluorination-Induced Conversion of the Quasi- to the Normal Interchain Packing in Push-Pull Conjugated Polymer Aggregates

AU - Yun, Hyuk Gu

AU - Nho, Hak Won

AU - Han, Se Gyo

AU - Cho, Jun Sang

AU - Bang, Jieun

AU - Yoon, Tae Woong

AU - Mun, Jungho

AU - Noh, Jaebum

AU - Jeong, Minyoung

AU - Kim, Dong Hyeon

AU - Kim, Bora

AU - Hwang, Hyeongjin

AU - Jeong, Mun Seok

AU - Lee, Hansol

AU - Rho, Junsuk

AU - Kang, Boseok

AU - Park, Jae Hong

AU - Jang, Joon I.

AU - Cho, Kilwon

AU - Kwon, Oh Hoon

AU - Lee, Dongki

PY - 2023/9/26

Y1 - 2023/9/26

N2 - We investigated the chain-length and fluorination effects on photophysics within push-pull conjugated polymer (CP, Mw 40k/100k PBDB-T and Mw 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 Mw 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.

AB - We investigated the chain-length and fluorination effects on photophysics within push-pull conjugated polymer (CP, Mw 40k/100k PBDB-T and Mw 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 Mw 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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U2 - 10.1021/acs.macromol.3c00995

DO - 10.1021/acs.macromol.3c00995

M3 - Article

AN - SCOPUS:85174222058

SN - 0024-9297

VL - 56

SP - 7366

EP - 7378

JO - Macromolecules

JF - Macromolecules

IS - 18

ER -

Fluorination-Induced Conversion of the Quasi- to the Normal Interchain Packing in Push-Pull Conjugated Polymer Aggregates

Abstract

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