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

RSC Adv. 2019 Nov 14;9(64):37287-37291. doi: 10.1039/c9ra07911d. eCollection 2019 Nov 13.

Authors

Jiasi Luo¹, Yang Wang¹, Bin Liu¹, Ziang Wu², Yujie Zhang¹, Yumin Tang¹, Peng Chen¹, Qiaogan Liao¹, Han Young Woo², Xugang Guo¹

Affiliations

¹ 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 wangy6@sustech.edu.cn guoxg@sustech.edu.cn.
² 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.