Side-Chain Effect on Cyclopentadithiophene/ Fluorobenzothiadiazole-Based Low Band Gap Polymers and Their Applications for Polymer Solar Cells

Yongxi Li; Jingyu Zou; Hin-Lap Yip; Chang-Zhi Li; Yong Zhang; Chu-Chen Chueh; Jeremy Intemann; Yunxiang Xu; Po-Wei Liang; Yu Chen; Alex K.-Y. Jen

doi:10.1021/ma4009302

Side-Chain Effect on Cyclopentadithiophene/ Fluorobenzothiadiazole-Based Low Band Gap Polymers and Their Applications for Polymer Solar Cells

Yongxi Li, Jingyu Zou, Hin-Lap Yip, Chang-Zhi Li, Yong Zhang, Chu-Chen Chueh, Jeremy Intemann, Yunxiang Xu, Po-Wei Liang, Yu Chen^*, Alex K.-Y. Jen^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

97 Citations (Scopus)

Abstract

A series of cyclopentadithiophene-based low band gap conjugated polymers with varied side-chain patterns and F-substituents were synthesized. By replacing the shorter 2-ethylhexyl (EH) side-chain with the longer 3,7-dimethyloctyl (DMO) side-chain, it resulted in significant changes to the optical, electrochemical, and morphological properties of the polymers, as well as the subsequent performance of devices made from these materials. Solar cells fabricated from polymer with 2-ethylhexyl (EH) side-chain and monofluoro substituent exhibits increased open circuit voltage, short circuit current and fill factor, resulting in the highest power conversion efficiency (5.5%) in this series of polymers. This finding provides valuable insight for making more efficient low band gap polymers. © 2013 American Chemical Society.

Original language	English
Pages (from-to)	5497-5503
Journal	Macromolecules
Volume	46
Issue number	14
Online published	28 Jun 2013
DOIs	https://doi.org/10.1021/ma4009302
Publication status	Published - 23 Jul 2013
Externally published	Yes

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title = "Side-Chain Effect on Cyclopentadithiophene/ Fluorobenzothiadiazole-Based Low Band Gap Polymers and Their Applications for Polymer Solar Cells",

abstract = "A series of cyclopentadithiophene-based low band gap conjugated polymers with varied side-chain patterns and F-substituents were synthesized. By replacing the shorter 2-ethylhexyl (EH) side-chain with the longer 3,7-dimethyloctyl (DMO) side-chain, it resulted in significant changes to the optical, electrochemical, and morphological properties of the polymers, as well as the subsequent performance of devices made from these materials. Solar cells fabricated from polymer with 2-ethylhexyl (EH) side-chain and monofluoro substituent exhibits increased open circuit voltage, short circuit current and fill factor, resulting in the highest power conversion efficiency (5.5%) in this series of polymers. This finding provides valuable insight for making more efficient low band gap polymers. {\textcopyright} 2013 American Chemical Society.",

author = "Yongxi Li and Jingyu Zou and Hin-Lap Yip and Chang-Zhi Li and Yong Zhang and Chu-Chen Chueh and Jeremy Intemann and Yunxiang Xu and Po-Wei Liang and Yu Chen and Jen, {Alex K.-Y.}",

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doi = "10.1021/ma4009302",

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TY - JOUR

T1 - Side-Chain Effect on Cyclopentadithiophene/ Fluorobenzothiadiazole-Based Low Band Gap Polymers and Their Applications for Polymer Solar Cells

AU - Li, Yongxi

AU - Zou, Jingyu

AU - Yip, Hin-Lap

AU - Li, Chang-Zhi

AU - Zhang, Yong

AU - Chueh, Chu-Chen

AU - Intemann, Jeremy

AU - Xu, Yunxiang

AU - Liang, Po-Wei

AU - Chen, Yu

AU - Jen, Alex K.-Y.

PY - 2013/7/23

Y1 - 2013/7/23

N2 - A series of cyclopentadithiophene-based low band gap conjugated polymers with varied side-chain patterns and F-substituents were synthesized. By replacing the shorter 2-ethylhexyl (EH) side-chain with the longer 3,7-dimethyloctyl (DMO) side-chain, it resulted in significant changes to the optical, electrochemical, and morphological properties of the polymers, as well as the subsequent performance of devices made from these materials. Solar cells fabricated from polymer with 2-ethylhexyl (EH) side-chain and monofluoro substituent exhibits increased open circuit voltage, short circuit current and fill factor, resulting in the highest power conversion efficiency (5.5%) in this series of polymers. This finding provides valuable insight for making more efficient low band gap polymers. © 2013 American Chemical Society.

AB - A series of cyclopentadithiophene-based low band gap conjugated polymers with varied side-chain patterns and F-substituents were synthesized. By replacing the shorter 2-ethylhexyl (EH) side-chain with the longer 3,7-dimethyloctyl (DMO) side-chain, it resulted in significant changes to the optical, electrochemical, and morphological properties of the polymers, as well as the subsequent performance of devices made from these materials. Solar cells fabricated from polymer with 2-ethylhexyl (EH) side-chain and monofluoro substituent exhibits increased open circuit voltage, short circuit current and fill factor, resulting in the highest power conversion efficiency (5.5%) in this series of polymers. This finding provides valuable insight for making more efficient low band gap polymers. © 2013 American Chemical Society.

UR - http://www.scopus.com/inward/record.url?scp=84880661970&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84880661970&origin=recordpage

U2 - 10.1021/ma4009302

DO - 10.1021/ma4009302

M3 - RGC 21 - Publication in refereed journal

SN - 0024-9297

VL - 46

SP - 5497

EP - 5503

JO - Macromolecules

JF - Macromolecules

IS - 14

ER -

Side-Chain Effect on Cyclopentadithiophene/ Fluorobenzothiadiazole-Based Low Band Gap Polymers and Their Applications for Polymer Solar Cells

Abstract

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