Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/58696
Type: Artigo de periódico
Title: QUANTUM SIZE EFFECTS ON CDTEXS1-X SEMICONDUCTOR-DOPED GLASS
Author: NETO, JAM
BARBOSA, LC
CESAR, CL
ALVES, OL
GALEMBECK, F
Abstract: We present experimental evidences of quantum confinement in borosilicate glasses with a new microcrystallite CdTexS1-x semiconductor. The microcrystallite sizes are controlled by the heat-treatment time and temperature. Transmission electron microscopy measurements show the microcrystallites average diameters near 55 angstrom for the sample treated for the longest time. We observe a red shift from 570 to 640 nm in the absorption and photoluminescence spectra as the size increases. These shifts agree with the expected quantum-confined energies, varying from 0.80 to 0.60 eV. The absorption spectra also show a second feature which can be assigned to the second quantum-confined transition.
Editor: Amer Inst Physics
Rights: aberto
Date Issue: 1991
Appears in Collections:Unicamp - Artigos e Outros Documentos

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