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Efficient ternary organic solar cells with suppressed nonradiative recombination via B‒N based polymer donor

Year: 2024
Type: article
Abstract: Organic solar cells (OSCs) have developed rapidly in recent years. However, the energy loss ( E loss ) remains a major obstacle to further improving the photovoltaic performance. To address this issue, a ternary strategy has been employed to precisely tune the E loss and boost the efficiency of OSCs. The B‒N-based polymer donor has been proved to process high E (T 1 ) and small Δ E ST characters, which can inhibition of CT state recombination. Herin, B‒N-based polymer donor PBNT-BDD was incorporated into the state-of-the-art PM6:L8-BO binary to construct ternary OSCs. Together with the optimal morphology, the ternary device affords an impressive power conversion efficiency of 18.95% with an improved open-circuit voltage ( V oc ), short-circuit density ( J sc ), and reduced E loss in comparison to the binary ones, which is the highest PCE for B‒N materials-based ternary device. This work broadens the selection of guest materials toward realizing the high performance of OSCs.
Source: iScience
DOI: 10.1016/j.isci.2024.111682
Authors: Shuting Pang, Wanyuan Deng, Langheng Pan, Xinyuan Liu, Zhibang Shen, Hongxiang Li, Pei Cheng, Jiayuan Zhu, Wensheng Yan, Chunhui Duan
Institutions: Hangzhou Dianzi University, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Chinese Academy of Sciences, Institute of High Energy Physics, Sichuan University, State Key Laboratory of Polymer Materials Engineering
Language: English
Open Access status: gold
Estimated APC paid: $3,150
Funders: Salt Science Research Foundation, National Natural Science Foundation of China, Hangzhou Dianzi University, Sichuan Province Science and Technology Support Program, Key Technologies Research and Development Program, National Key Research and Development Program of China
OpenAlex ID: W4405760973
FWCI: 0.616
Cites: 49
Cited by: 6
Related to: 10