Influence of molecule adsorption on porous silicon photoluminescence
1995; Elsevier BV; Volume: 255; Issue: 1-2 Linguagem: Inglês
10.1016/0040-6090(94)05662-w
ISSN1879-2731
AutoresTh. Dittrich, Е. А. Константинова, V. Yu. Timoshenko,
Tópico(s)Semiconductor materials and devices
ResumoAs-anodized porous silicon (PS) was investigated in situ by photoluminescence (PL) during the adsorption of H2O, O2, C2H5OH and C2(CN)4 molecules. The PL intensity was increased during H2O adsorption (to 130%) and decreased by adsorption of O2 (to 30%), C2H5OH (to 22%) and C2(CN)4 (to 5%). A strong blue shift was observed during the C2H5OH adsorption. The reversibility of the adsorption-induced PL changes was compared for the different atmospheres. Reversibility by the simple cycle high vacuum pumping (HV)-adsorption-HV could be reached only for C2H5OH. The PL changes induced by H2O and C2(CN)4 adsorption were good (H2O) or partially (C2(CN)4) reversible in combination with heat treatment at 420 K in HV. The O2-adsorption-induced PL changes are not reversible by simple or modified cycles.
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