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- W4308372775 abstract "Tribovoltaic direct-current (DC) nanogenerator made of dynamic semiconductor heterojunction is emerging as a promising mechanical energy harvesting technology. However, fundamental understanding of the mechano-electronic carrier excitation and transport at dynamic semiconductor interfaces remains to be investigated. Here, we demonstrated for the first time, that tribovoltaic DC effect can be tuned with metal-insulator transition (MIT). In a representative MIT material (vanadium dioxide, VO2), we found that the short-circuit current (ISC) can be enhanced by >20 times when the material is transformed from insulating to metallic state upon static or dynamic heating, while the open-circuit voltage (VOC) turns out to be unaffected. Such phenomenon may be understood by the Hubbard model for Mott insulator: orders’ magnitude increase in conductivity is induced when the nearest hopping changes dramatically and overcomes the Coulomb repulsion, while the Coulomb repulsion giving rise to the quasi-particle excitation energy remains relatively stable." @default.
- W4308372775 created "2022-11-11" @default.
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- W4308372775 date "2022-11-07" @default.
- W4308372775 modified "2023-10-11" @default.
- W4308372775 title "Tunable Tribovoltaic Effect via Metal–Insulator Transition" @default.
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- W4308372775 doi "https://doi.org/10.1021/acs.nanolett.2c03481" @default.
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- W4308372775 hasPublicationYear "2022" @default.
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