19.31% binary organic solar cell and low non-radiative recombination enabled by non-monotonic intermediate state transition

Fu, Jiehao; Fong, Patrick W. K.; Liu, Heng; Huang, Chieh-Szu; Lu, Xinhui; Lu, Shirong; Abdelsamie, Maged; Kodalle, Tim; Sutter-Fella, Carolin M.; Yang, Yang; Li, Gang

doi:10.1038/s41467-023-37526-5

19.31% binary organic solar cell and low non-radiative recombination enabled by non-monotonic intermediate state transition

Journal Article · Thu Mar 30 00:00:00 EDT 2023 · Nature Communications

DOI:https://doi.org/10.1038/s41467-023-37526-5· OSTI ID:1972948

^[1]; ^[1]; Liu, Heng ^[2]; ^[3]; ^[2]; Lu, Shirong ^[4]; Abdelsamie, Maged ^[5]; ^[6]; ^[6]; ^[3]; ^[1]

Hong Kong Polytechnic University, Hong Kong and Shenzhen (China). Shenzhen Research Institute
Chinese University of Hong Kong (China)
Univ. of California, Los Angeles, CA (United States)
Taizhou University (China)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); King Fahd University of Petroleum and Minerals, Dhahran (Saudi Arabia)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry

Non-fullerene acceptors based organic solar cells represent the frontier of the field, owing to both the materials and morphology manipulation innovations. Non-radiative recombination loss suppression and performance boosting are in the center of organic solar cell research. Here, we developed a non-monotonic intermediate state manipulation strategy for state-of-the-art organic solar cells by employing 1,3,5-trichlorobenzene as crystallization regulator, which optimizes the film crystallization process, regulates the self-organization of bulk-heterojunction in a non-monotonic manner, i.e., first enhancing and then relaxing the molecular aggregation. As a result, the excessive aggregation of non-fullerene acceptors is avoided and we have achieved efficient organic solar cells with reduced non-radiative recombination loss. In PM6:BTP-eC9 organic solar cell, our strategy successfully offers a record binary organic solar cell efficiency of 19.31% (18.93% certified) with very low non-radiative recombination loss of 0.190 eV. And lower non-radiative recombination loss of 0.168 eV is further achieved in PM1:BTP-eC9 organic solar cell (19.10% efficiency), giving great promise to future organic solar cell research.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry

Sponsoring Organization:: National Science Foundation of China (NSFC); Research Grants Council of Hong Kong; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1972948

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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