Efficient charge separation on organic D/A heterojunction photocatalysts for hydrogen evolution Junyin Dong 1 , Hanxi Jiang 2 , Yi Chan 1 , Yao Li 1 , Yongmin Luo 1 , Zhuping Fei 2 , Jiaying Wu 1 * 1 The Hong Kong University of Science and Technology (Guangzhou), Function Hub, Advanced Materials Thrust, Nansha, Guangzhou 511400, China, 2 Institute of Molecular Plus, Department of Chemistry, Key Laboratory of Organic Integrated Circuits, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin 300072, China Photocatalytic water splitting to produce hydrogen is a sustainable way to solve energy and environmental problems. Organic donor/acceptor (D/A) heterojunction materials have been emerged as a promising high efficiency photocatalysts for water splitting hydrogen evolution. By introducing a series of Y6-dimer materials and combining these dimeric Y6 derivative acceptor with PM6 donor, hydrogen generation efficiency is increased. Photophysical studies show that these dimeric acceptor-based nanoparticles can have higher exciton dissociation and polaron generation efficiency, which is beneficial for increased charge carrier lifetime. It can be attributed to the more complex dimeric structure, and that can also improve the stability of the catalyst materials.
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© The Author(s), 2025
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