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- W2019171504 abstract "Photoinduced interdiffusion was observed with above band gap light in nanolayered Se∕As2S3 films. It is discussed in terms of the optical parameters such as band gap, Urbach edge (Ee) [F. Urbach, Phys. Rev. 92, 1324 (1953)], and B1∕2 (Tauc’s parameter) [J. Tauc et al., Phys. Status Solidi 15, 627 (1966)]. Experimental data of B1∕2 and Ee for as-prepared samples do not show clear correlation implied by the Mott-Davis model [N. F. Mott and E. A. Davis, Electronic Process in Non-crystalline Materials (Clarendon, Oxford 1979), p. 287]. It is also shown that the optical parameters can be changed with a change in the Se sublayer thickness. Variations of these optical parameters as a function of modulation period and photoinduced interdiffusion were discussed in terms of the quantum confinement effect and changes in the valence and conduction bands. We proposed a model to explain the mechanism of Se diffusion in As2S3, which suggests that diffusion takes place through the wrong bonds. X-ray photoelectron spectroscopy (XPS) is used to investigate the chemical alternations in the bonding. The proposed model was supported by the XPS data." @default.
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- W2019171504 date "2006-05-01" @default.
- W2019171504 modified "2023-09-25" @default.
- W2019171504 title "Photoinduced interdiffusion in nanolayered Se∕As2S3 films: Optical and x-ray photoelectron spectroscopic studies" @default.
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- W2019171504 doi "https://doi.org/10.1063/1.2193061" @default.
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