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• W2089969658 abstract "Abstract Photoluminescence (PL) spectra of porous silicon (PS) at 77–440 K have been studied. We report the observation of additional peaks on the PL band and pronounced fine structure at rather high temperature (77 K). We have found the transformation of the spectra when as-prepared green-emitting PS was subjected to drying in ambient air. The temperature quenching of the PL intensity revealed the same activation energy as the electroconductivity, ~ 0.3 eV, and is considered to be the ionization energy of the radiative centre. Optical absorption measurements reveal the Urbach-like behaviour of the fundamental absorption edge and the energy gap, the latter being ~ 2.4 eV." @default.
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• W2089969658 date "1995-01-01" @default.
• W2089969658 modified "2023-09-27" @default.
• W2089969658 title "Optical and electrical properties of porous silicon and stain-etched films" @default.
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• W2089969658 doi "https://doi.org/10.1016/0040-6090(94)05653-u" @default.
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