Isomerization enabling near-infrared electron acceptors

Jiasi Luo; Yang Wang; Bin Liu; Ziang Wu; Yujie Zhang; Yumin Tang; Peng Chen; Qiaogan Liao; Han Young Woo; Xugang Guo

doi:10.1039/C9RA07911D

Isomerization enabling near-infrared electron acceptors†

Jiasi Luo,‡^a Yang Wang,

‡*^a Bin Liu,^a Ziang Wu,^b Yujie Zhang,^a Yumin Tang,^a Peng Chen,^a Qiaogan Liao,^a Han Young Woo

^b and Xugang Guo

*^a

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* Corresponding authors

^a Department of Materials Science and Engineering, The Shenzhen Key Laboratory for Printed Organic Electronics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
E-mail: wangy6@sustech.edu.cn, guoxg@sustech.edu.cn

^b Department of Chemistry, Korea University, Seoul 02841, South Korea

Abstract

An isomerization method was utilized to yield a novel near-infrared nonfullerene acceptor DTA-IC-M. By simply changing the linking fashion between the anthracene and neighboring thiophenes, a remarkable redshift (∼170 nm) of absorption was observed from DTA-IC-S to its isomer DTA-IC-M which shows a maximum absorption peak over 800 nm with a narrow bandgap of 1.35 eV. Due to the enhanced photo-to-current response in the near-infrared region, an improved short-circuit current of 12.96 mA cm⁻² was achieved for the DTA-IC-M based OSCs.

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Isomerization enabling near-infrared electron acceptors†

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