Benzobisthiazole and rhodanine based low energy level small molecule donors for organic solar cells
Year: 2024
Type: article
Abstract: At present, high-performance small molecule donors for organic solar cells (OSCs) are almost entirely composed of the electron donating core benzodithiophene (BDT), which has resulted in a lack of material diversity and further improvement. In this article, we constructed an A-π-A′-π-A conjugated structure using electron withdrawing group benzobisthiazole (BBT) core and rhodanine end group, and synthesized two small molecule donors BBTSM-3 and BBTSM-4. Under the dual electron withdrawing effects of BBT and rhodanine , the HOMO energy levels of BBTSM-3 and BBTSM-4 reached extremely low levels (−5.60 eV and −5.64 eV), but still matched well with the acceptor Y6. In addition, through reasonable side chain regulation, BBTSM-3 exhibited stronger crystallinity and weaker aggregation at the same time. This provides a reference point for the use of the electron withdrawing core and the regulation of side chains among small molecule donors.
Source: Dyes and Pigments
Authors: Dong Han, Shuguang Wen, Kai Song, Jing Lv, Chunming Yang, Tao Zhuang, Aziz Saparbaev, Mingliang Sun, Xichang Bao
Institutions: Chinese Academy of Sciences, Qingdao Institute of Bioenergy and Bioprocess Technology, Ocean University of China, Shanghai Advanced Research Institute, Shanghai Synchrotron Radiation Facility, Qingdao University of Science and Technology, Academy of Sciences Republic of Uzbekistan, Institute of Ion Plasma Laser Technologies, National University of Uzbekistan
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,220
OpenAlex ID: W4404626360