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Effect of Cu 2+ and Co 2+ on Photoluminescence Properties of SiO 2 Xerogel
Author(s) -
Yang Ping,
Kai Lü Meng,
Feng Song Chun,
Xu Dong,
Rong Yuan Duo
Publication year - 2002
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200205)231:1<106::aid-pssb106>3.0.co;2-8
Subject(s) - photoluminescence , doping , blueshift , dopant , materials science , analytical chemistry (journal) , fourier transform infrared spectroscopy , absorption (acoustics) , fluorescence , emission spectrum , absorption spectroscopy , spectral line , band gap , red shift , ion , chemistry , optics , optoelectronics , organic chemistry , physics , quantum mechanics , astronomy , galaxy , composite material
SiO 2 xerogel doped with Cu 2+ and Co 2+ has been prepared by the sol–gel method. The photoluminescence (PL) spectra, Fourier transform infrared (FTIR) spectra and absorption spectra of the samples have all been investigated. The absorption spectra of Cu 2+ ‐doped silica xerogel present a red shift as comparing with that of the un‐doped silica xerogel. Also, the emission spectra of Cu 2+ ‐doped samples present a red shift with the increasing concentration of Cu 2+ (color range from 450 to 470 nm). Very strong visible‐light emission (color range from purple to blue) has been observed from doped silica xerogel. Because the dopant ions affect the band gap structure of the host materials, the emission wavelength and fluorescence intensity of the doped samples are varied. The emission spectra of the samples co‐doped with Cu 2+ and Co 2+ present a blue shift (a maximum at 440 nm).