Benzothiadiazole Versus Thiophene: Influence of the Auxiliary Acceptor on the Photovoltaic Properties of Donor–Acceptor-Based Copolymers

Zongbo Li; Kangkang Weng; Aihua Chen; Xiaobo Sun; Donghui Wei; Mingming Yu; Lijun Huo; Yanming Sun

doi:10.1002/marc.201700547

Benzothiadiazole Versus Thiophene: Influence of the Auxiliary Acceptor on the Photovoltaic Properties of Donor–Acceptor-Based Copolymers

Zongbo Li, Kangkang Weng, Aihua Chen^*, Xiaobo Sun, Donghui Wei, Mingming Yu, Lijun Huo, Yanming Sun

^*Corresponding author for this work

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

9 Citations (Scopus)

Abstract

Two donor–acceptor (D–A) type conjugated copolymers, P1 and P2, are designed and synthesized. A classical benzothiadiazole acceptor is used to replace a thiophene unit in the polymer chain of P1 to obtain P2 terpolymer. Compared with P1, P2 exhibits broader absorption spectra, higher absorption coefficient, deeper lowest unoccupied molecular orbital level, and a relatively lower band gap. As a result, the P2-based solar cell exhibits a high power conversion efficiency (PCE) of 6.60%, with a short-circuit current (J _sc) of 12.43 mA cm⁻², and a fill factor (FF) of 73.1%, which are higher than those of the P1-based device with a PCE of 4.70%, a J _sc of 9.43 mA cm⁻², and an FF of 61.6%.

Original language	English
Article number	1700547
Journal	Macromolecular Rapid Communications
Volume	39
Issue number	2
DOIs	https://doi.org/10.1002/marc.201700547
Publication status	Published - Jan 2018
Externally published	Yes

Keywords

benzothiadiazole
organic solar cells
power conversion efficiency
terpolymers

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/marc.201700547

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title = "Benzothiadiazole Versus Thiophene: Influence of the Auxiliary Acceptor on the Photovoltaic Properties of Donor–Acceptor-Based Copolymers",

abstract = "Two donor–acceptor (D–A) type conjugated copolymers, P1 and P2, are designed and synthesized. A classical benzothiadiazole acceptor is used to replace a thiophene unit in the polymer chain of P1 to obtain P2 terpolymer. Compared with P1, P2 exhibits broader absorption spectra, higher absorption coefficient, deeper lowest unoccupied molecular orbital level, and a relatively lower band gap. As a result, the P2-based solar cell exhibits a high power conversion efficiency (PCE) of 6.60%, with a short-circuit current (J sc) of 12.43 mA cm−2, and a fill factor (FF) of 73.1%, which are higher than those of the P1-based device with a PCE of 4.70%, a J sc of 9.43 mA cm−2, and an FF of 61.6%.",

keywords = "benzothiadiazole, organic solar cells, power conversion efficiency, terpolymers",

author = "Zongbo Li and Kangkang Weng and Aihua Chen and Xiaobo Sun and Donghui Wei and Mingming Yu and Lijun Huo and Yanming Sun",

note = "Publisher Copyright: {\textcopyright} 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2018",

month = jan,

doi = "10.1002/marc.201700547",

language = "English",

volume = "39",

journal = "Macromolecular Rapid Communications",

issn = "1022-1336",

publisher = "Wiley-VCH Verlag",

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TY - JOUR

T1 - Benzothiadiazole Versus Thiophene

T2 - Influence of the Auxiliary Acceptor on the Photovoltaic Properties of Donor–Acceptor-Based Copolymers

AU - Li, Zongbo

AU - Weng, Kangkang

AU - Chen, Aihua

AU - Sun, Xiaobo

AU - Wei, Donghui

AU - Yu, Mingming

AU - Huo, Lijun

AU - Sun, Yanming

PY - 2018/1

Y1 - 2018/1

N2 - Two donor–acceptor (D–A) type conjugated copolymers, P1 and P2, are designed and synthesized. A classical benzothiadiazole acceptor is used to replace a thiophene unit in the polymer chain of P1 to obtain P2 terpolymer. Compared with P1, P2 exhibits broader absorption spectra, higher absorption coefficient, deeper lowest unoccupied molecular orbital level, and a relatively lower band gap. As a result, the P2-based solar cell exhibits a high power conversion efficiency (PCE) of 6.60%, with a short-circuit current (J sc) of 12.43 mA cm−2, and a fill factor (FF) of 73.1%, which are higher than those of the P1-based device with a PCE of 4.70%, a J sc of 9.43 mA cm−2, and an FF of 61.6%.

AB - Two donor–acceptor (D–A) type conjugated copolymers, P1 and P2, are designed and synthesized. A classical benzothiadiazole acceptor is used to replace a thiophene unit in the polymer chain of P1 to obtain P2 terpolymer. Compared with P1, P2 exhibits broader absorption spectra, higher absorption coefficient, deeper lowest unoccupied molecular orbital level, and a relatively lower band gap. As a result, the P2-based solar cell exhibits a high power conversion efficiency (PCE) of 6.60%, with a short-circuit current (J sc) of 12.43 mA cm−2, and a fill factor (FF) of 73.1%, which are higher than those of the P1-based device with a PCE of 4.70%, a J sc of 9.43 mA cm−2, and an FF of 61.6%.

KW - benzothiadiazole

KW - organic solar cells

KW - power conversion efficiency

KW - terpolymers

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DO - 10.1002/marc.201700547

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AN - SCOPUS:85040786374

SN - 1022-1336

VL - 39

JO - Macromolecular Rapid Communications

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ER -

Benzothiadiazole Versus Thiophene: Influence of the Auxiliary Acceptor on the Photovoltaic Properties of Donor–Acceptor-Based Copolymers

Abstract

Keywords

UN SDGs

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