Organic solar cells with 20.82% efficiency and high tolerance of active layer thickness through crystallization sequence manipulationShow others and affiliations
2025 (English)In: Nature Materials, ISSN 1476-1122, E-ISSN 1476-4660Article in journal (Refereed) Epub ahead of print
Abstract [en]
Printing of large-area solar panels necessitates advanced organic solar cells with thick active layers. However, increasing the active layer thickness typically leads to a marked drop in the power conversion efficiency. Here we developed an organic semiconductor regulator, called AT-beta 2O, to tune the crystallization sequence of the components in active layers. When adding AT-beta 2O in the donor (D18-Cl) and acceptor (N3) blend, N3 crystallizes behind D18-Cl, and this phenomenon is different from the co-crystallization observed in binary D18-Cl:N3 blends. This manipulation of crystallization dynamics is favourable to form bulk-heterojunction-gradient vertical phase separation in the active layer accompanied by the high crystallinity of the acceptor and balanced charge carrier mobilities in thick films. The resultant single-junction organic solar cells exhibited a certified power conversion efficiency of over 20%, as well as demonstrated exceptional adaptability across the active layer thicknesses (100-400 nm) and remarkable universality. Such breakthroughs enable large-area modules with a certified power conversion efficiency of 18.04%.
Place, publisher, year, edition, pages
NATURE PORTFOLIO , 2025.
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-211186DOI: 10.1038/s41563-024-02062-0ISI: 001399436800001PubMedID: 39824965OAI: oai:DiVA.org:liu-211186DiVA, id: diva2:1931855
Note
Funding Agencies|National Natural Science Foundation of China (National Science Foundation of China) [52325307, 52273188, 22309129, 22075194]; National Natural Science Foundation of China [BE2022023]; Department of Science and Technology of Jiangsu Province [BX20220221]; National Postdoctoral Program for Innovative Talents [2023M732530]; China Postdoctoral Science Foundation [2023NSFSC0990]; Sichuan Science and Technology Program; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD); Collaborative Innovation Center of Suzhou Nano Science and Technology; Key Laboratory of Polymeric Materials Design and Synthesis for Biomedical Function, Soochow University [DE-AC02-05CH11231]; Office of Science, Office of Basic Energy Sciences, US Department of Energy; Suzhou Sunflex New Energy Company; State Key Lab of Luminescent Materials and Devices, South China University of Technology
2025-01-282025-01-282025-01-28