Triplet Tellurophene-Based Acceptors for Organic Solar Cells

Lei Yang; Wenxing Gu; Lei Lv; Yusheng Chen; Yufei Yang; Pan Ye; Jianfei Wu; Ling Hong; Aidong Peng; Hui Huang

doi:10.1002/anie.201712011

Triplet Tellurophene-Based Acceptors for Organic Solar Cells

Angew Chem Int Ed Engl. 2018 Jan 22;57(4):1096-1102. doi: 10.1002/anie.201712011. Epub 2018 Jan 4.

Authors

Lei Yang¹, Wenxing Gu^{1

2}, Lei Lv¹, Yusheng Chen¹, Yufei Yang¹, Pan Ye¹, Jianfei Wu¹, Ling Hong¹, Aidong Peng¹, Hui Huang¹

Affiliations

¹ College of Materials Science and Optoelectronic Technology & CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, 101408, P. R. China.
² School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing, 101408, P. R. China.

PMID: 29215780
DOI: 10.1002/anie.201712011

Abstract

Triplet materials have been employed to achieve high-performing organic solar cells (OSCs) by extending the exciton lifetime and diffusion distances, while the triplet non-fullerene acceptor materials have never been reported for bulk heterojunction OSCs. Herein, for the first time, three triplet molecular acceptors based on tellurophene with different degrees of ring fusing were designed and synthesized for OSCs. Significantly, these molecules have long exciton lifetime and diffusion lengths, leading to efficient power conversion efficiency (7.52 %), which is the highest value for tellurophene-based OSCs. The influence of the extent of ring fusing on molecular geometry and OSCs performance was investigated to show the power conversion efficiencies (PCEs) continuously increased along with increasing the extent of ring fusing.

Keywords: non-fullerene acceptors; organic solar cells; tellurophene; triplet state.

Publication types

Research Support, Non-U.S. Gov't