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

descriptionPublicationkeyboard_double_arrow_right Article , Journal 25 Oct 2017Publisher:WileyJournal:Macromolecular Rapid Communications, volume 39 (issn: 1022-1336, eissn: 1521-3927,

Authors: Zongbo Li; Kangkang Weng; Aihua Chen; Xiaobo Sun; Donghui Wei; Mingming Yu; Lijun Huo; +1 Authors

doi: 10.1002/marc.201700547

pmid: 29068509

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

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Abstract

AbstractTwo 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%.

Related Organizations

Zhengzhou University
China (People's Republic of)
Zhengzhou University
China (People's Republic of)
Beihua University
China (People's Republic of)
Beihang University
China (People's Republic of)

Keywords

Electric Power Supplies, Polymers, Thiadiazoles, Solar Energy, Thiophenes, Photochemical Processes

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