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Updated: Apr 17, 2026

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A regioregular terpolymer comprising two electron-deficient and one electron-rich unit for ultra small band gap solar
Weiwei Li1, Koen H Hendriks, Alice Furlan
1Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. liweiwei@iccas.ac.cn.
Abstract:
A regioregular terpolymer that combines electron-deficient diketopyrrolopyrrole and benzothiadiazole units with an electron-rich dithienopyrrole unit is presented. In solar cells, the terpolymer affords an open circuit voltage of 0.52 V and a power conversion efficiency of 3.7% with a spectral response up to 1050 nm.
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