Influence of side chains on low optical bandgap copolymers based on 2,1,3-benzoxadiazole for polymer solar cells

Minghui Hao; Xiaodong Li; Yuan Zhao; Zhanxiang Chen; Junfeng Fang; Lei Wang; Chuluo Yang

doi:10.1016/j.orgel.2018.06.001

Influence of side chains on low optical bandgap copolymers based on 2,1,3-benzoxadiazole for polymer solar cells

Minghui Hao
, Xiaodong Li
, Yuan Zhao
, Zhanxiang Chen
, Junfeng Fang
, Lei Wang
, Chuluo Yang^*

^*Corresponding author for this work

Shenzhen University
CAS - Ningbo Institute of Material Technology and Engineering
Wuhan University

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

4 Scopus citations

Abstract

Two copolymers based on 2,1,3-benzoxadiazole (BO) as the acceptor unit and quaterthiophene as the donor unit, which possess different steric hindrance in the backbone, were designed and synthesized. The backbone conformations and electronic structures as well as the theoretically optimal structures of both copolymers were calculated. The influences of steric hindrance on photophysical and electrochemical properties of the polymers were investigated. With the steric hindrance of the polymers decreased, the optical bandgaps were decreased, and the HOMO levels upshifted while the LUMO levels downshifted. The weight ratio and annealing temperature on the performances of the polymer-based devices were evaluated in detail. The best device based on the polymer exhibited a moderate power conversion efficiency of 4.44%.

Original language	English
Pages (from-to)	261-265
Number of pages	5
Journal	Organic Electronics
Volume	61
DOIs	https://doi.org/10.1016/j.orgel.2018.06.001
State	Published - Oct 2018
Externally published	Yes

Keywords

Bulk-heterojunction
Conjugated polymers
Polymer solar cells
Steric hindrance

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10.1016/j.orgel.2018.06.001

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title = "Influence of side chains on low optical bandgap copolymers based on 2,1,3-benzoxadiazole for polymer solar cells",

abstract = "Two copolymers based on 2,1,3-benzoxadiazole (BO) as the acceptor unit and quaterthiophene as the donor unit, which possess different steric hindrance in the backbone, were designed and synthesized. The backbone conformations and electronic structures as well as the theoretically optimal structures of both copolymers were calculated. The influences of steric hindrance on photophysical and electrochemical properties of the polymers were investigated. With the steric hindrance of the polymers decreased, the optical bandgaps were decreased, and the HOMO levels upshifted while the LUMO levels downshifted. The weight ratio and annealing temperature on the performances of the polymer-based devices were evaluated in detail. The best device based on the polymer exhibited a moderate power conversion efficiency of 4.44\%.",

keywords = "Bulk-heterojunction, Conjugated polymers, Polymer solar cells, Steric hindrance",

author = "Minghui Hao and Xiaodong Li and Yuan Zhao and Zhanxiang Chen and Junfeng Fang and Lei Wang and Chuluo Yang",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = oct,

doi = "10.1016/j.orgel.2018.06.001",

language = "英语",

volume = "61",

pages = "261--265",

journal = "Organic Electronics",

issn = "1566-1199",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Influence of side chains on low optical bandgap copolymers based on 2,1,3-benzoxadiazole for polymer solar cells

AU - Hao, Minghui

AU - Li, Xiaodong

AU - Zhao, Yuan

AU - Chen, Zhanxiang

AU - Fang, Junfeng

AU - Wang, Lei

AU - Yang, Chuluo

PY - 2018/10

Y1 - 2018/10

N2 - Two copolymers based on 2,1,3-benzoxadiazole (BO) as the acceptor unit and quaterthiophene as the donor unit, which possess different steric hindrance in the backbone, were designed and synthesized. The backbone conformations and electronic structures as well as the theoretically optimal structures of both copolymers were calculated. The influences of steric hindrance on photophysical and electrochemical properties of the polymers were investigated. With the steric hindrance of the polymers decreased, the optical bandgaps were decreased, and the HOMO levels upshifted while the LUMO levels downshifted. The weight ratio and annealing temperature on the performances of the polymer-based devices were evaluated in detail. The best device based on the polymer exhibited a moderate power conversion efficiency of 4.44%.

AB - Two copolymers based on 2,1,3-benzoxadiazole (BO) as the acceptor unit and quaterthiophene as the donor unit, which possess different steric hindrance in the backbone, were designed and synthesized. The backbone conformations and electronic structures as well as the theoretically optimal structures of both copolymers were calculated. The influences of steric hindrance on photophysical and electrochemical properties of the polymers were investigated. With the steric hindrance of the polymers decreased, the optical bandgaps were decreased, and the HOMO levels upshifted while the LUMO levels downshifted. The weight ratio and annealing temperature on the performances of the polymer-based devices were evaluated in detail. The best device based on the polymer exhibited a moderate power conversion efficiency of 4.44%.

KW - Bulk-heterojunction

KW - Conjugated polymers

KW - Polymer solar cells

KW - Steric hindrance

UR - https://www.scopus.com/pages/publications/85048743016

U2 - 10.1016/j.orgel.2018.06.001

DO - 10.1016/j.orgel.2018.06.001

M3 - 文章

AN - SCOPUS:85048743016

SN - 1566-1199

VL - 61

SP - 261

EP - 265

JO - Organic Electronics

JF - Organic Electronics

ER -

Influence of side chains on low optical bandgap copolymers based on 2,1,3-benzoxadiazole for polymer solar cells

Abstract

Keywords

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