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Fast and slow visible luminescence bands of oxidized porous Si (1994)

Kovalev, D. I. ; Yaroshetzkii, I. D. ; Muschik, T. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 64 (1994), S. 214-216

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: The visible luminescence of porous Si is known to contain at least two spectrally distinct emission bands with widely different response times. The orange-red luminescence component (1.5–1.9 eV) decays in times being of the order of 10 μs at room temperature. The blue-green band (2.3–2.6 eV) is very much faster with response time in the 10-ns range. It is shown that with increasing degree of oxidation the fraction of the fast luminescence intensity rises from ∼1% of the total in the as-prepared porous Si to become the dominant spectral component in strongly oxidized material. For the rapid-thermal-oxidized material excited with 337-nm radiation, the intensity of the fast luminescence is comparable to that in the as-prepared state.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.111508

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