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Proceedings Paper

Preparation of semiconducting sulfides microcrystalline-doped silica glasses by the sol-gel process
Author(s): Masayuki Nogami; Michie Watabe; Katsumi Nagasaka
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Paper Abstract

The sol-gel process has been applied successfully to the preparation of small-particle-size ZnS, CdS or PbS-doped silica glasses with a significant quantum size effect. Gels prepared through the hydrolysis of complex solutions of Si(0C2H5)4 and acetate of Zn, Cd or Pb were heated at 500 to 900°C, then reacted with H2S gas to form fine microcrystals doped glasses. From X-ray diffraction analyses and transmission electron mlcrographs, these crystals were cubic ZnS, hexagonal CdS and cubic PbS crystal, respectively, and their sizes were 2 to 8 nm in diameter. In the optical absorption spectra, the absorption edge exhibited a blue shift compared with those of the bulk sulfides crystals. Size dependence of energy shift was discussed in relation to size quantization of electron-hole in microcrystals. The nonlinearity was estimated to be 1.5 x i0O esu for 2% CdS doped glass.

Paper Details

Date Published: 1 November 1990
PDF: 6 pages
Proc. SPIE 1328, Sol-Gel Optics, (1 November 1990); doi: 10.1117/12.22551
Show Author Affiliations
Masayuki Nogami, Aichi Institute of Technology (Japan)
Michie Watabe, Aichi Institute of Technology (Japan)
Katsumi Nagasaka, Aichi Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 1328:
Sol-Gel Optics
John D. Mackenzie; Donald R. Ulrich, Editor(s)

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