Truxene Functionalized Star-Shaped Non-fullerene Acceptor With Selenium-Annulated Perylene Diimides for Efficient Organic Solar Cells

Frontiers in Chemistry

Yuehui Wang¹  Yong Cao²  Fei Huang²  Kaiwen Lin²  Chunhui Duan²  Qingwu Yin²  Boming Xie²  Zhenfeng Wang² 

[1] Department of Materials and Food, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan, China;State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, China;

关键词: organic solar cells;    non-fullerene acceptor;    truxene;    perylene diimides;    selenium;   

DOI  :  10.3389/fchem.2021.681994

来源: DOAJ

【 摘 要 】

An electron acceptor with a truxene core and ring-fusion perylene diimide (PDI) tripolymer annulated by selenium (Se) branch, named as FTr-3PDI-Se, is designed and synthesized. FTr-3PDI-Se exhibits large conjugated planar conformation, strong absorption spectra in the regions of 300–400 and 450–550 nm, the deep HOMO energy level of 6.10 eV, and high decomposition temperature above 400°C. The FTr-3PDI-Se: PBDB-T-2Cl based device achieved a disappointing power conversion efficiency (PCE) of 1.6% together with a high Voc of 1.12 V. The low PCE was due to the large aggregates of blend film, the imbalanced hole/electron transport and low PL quenching efficiencies. The high Voc can be attributed to the high-lying LUMO level of FTr-3PDI-Se and the low-lying HOMO level of PBDB-T-2Cl. Our research presents an interesting and effective molecule-designing method to develop non-fullerene acceptor.

【 授权许可】

Unknown