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Title of periodic: Journal of Non-crystalline Solids Amsterdam
Authors: Costa, Vilma Conceição
Shen, Y.R.
Bray, K.L.
Affiliation: Centro de Desenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, Mg, Brasil
Washington State University, Pullman, WA USA
Washington State University, Pullman, WA, USA
Issue Date: 2002
Keywords: Semiconductor materials;optical properties;sol-gel process
Abstract: In the present work,we report our results for the sol-gel preparation and optical properties of CdS nanometer sized particles and Mn2+-doped Us particles in silica-type glass matrices. Gels containing 4.5 wt percent CdO in 95.5SiO(2) and 4.5Na(2)O-18B(2)O(3)-73.5SiO(2) matrices were prepared through a hydrolysis of tetrraethoxysilane, cadmium acetate and, in the sodium borosilicate composition, boron ethhoxide and sodium acetate. We designed severeal heat treatments i H2S to convert CdO to Us in the gels. The influence of the heat treatment conditions on the optical properties of the nanoparticle semiconductor materials was studied using transmission electron microscopy, absorption and temperaure-dependent photoluminescence. A model of the photoluminescence process was proposed to explain the obvserved emission bands.
Access: L
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