The distance dependence of charge transfer efficiency from a rhodamine dye to a TiO2-based semiconductor film in the near field of Ag nanoparticles
Оmarova G. Ibrayev N. Seliverstova E. Koishybai Z. Sadykova A.
December 2025Elsevier B.V.
Chemical Physics Letters
2025#880
The distance dependence of charge transfer efficiency from rhodamine dye to a TiO2-based semiconductor film was studied, and the influence of plasmon core@shell nanoparticles (Ag@TiO2) on this process is considered. The distance between the dye and the semiconductor was controlled using monolayers of polyampholyte (∼2 nm). The fluorescence intensity of the dye exhibits a strong dependence on the distance to semiconductor film, accompanied by changes in the lifetime of the electron-excited state of dye. In the presence of Ag@TiO2 nanoparticles, the charge transfer was significantly enhanced that was confirmed by the growth of photocurrent of the solar cell (by 47 %).
Charge transfer , Core@shell nanoparticles , Distance dependence , Dye-semiconductor system , Plasmon effect
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Institute of Molecular Nanophotonics, Buketov Karaganda University, Universitetskaya str. 28, Karaganda, 100024, Kazakhstan
Institute of Molecular Nanophotonics
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