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Spectroscopy and crystal-field analysis for Cr(IV) in alumino-silicate glasses

Spectroscopy and crystal-field analysis for Cr(IV) in alumino-silicate glasses
Spectroscopy and crystal-field analysis for Cr(IV) in alumino-silicate glasses
Racah parameters of Cr4+ ions in alumino-silicate glasses have been calculated, indicating most Cr4+ ions are located at low-field sites. Using three-peak Gauss fitting for the luminescence lineshape of Cr4+:alumino-silicate glass at low temperatures, the existence of Cr4+ at high-field sites has been demonstrated for the first time in the alumino-silicate glass. The temperature dependence of the emission of low-Cr2O3 glass shows blue shift because most of the Cr4+ ions are in the low-field sites; in which the Cr4+ ions show the large difference of the thermal population at different excited states due to the non-radiative processes. On the other hand, the concentration dependence of the emission of Cr4+ ions in alumino-silicate glass shows red shift, caused by the energy transfer between Cr4+ ions in different crystal-field sites, and subsequently the mechanism of energy transfer between Cr4+ ions at low-field sites and at high-field sites has been proposed.
optical materials, crystal field, Cr(IV), transition-metal ions
63-72
Feng, Xian
b1a28be8-c603-4239-9c93-b2c14274e9c7
Tanabe, Setsuhisa
84d497b1-4aca-480f-bbf1-e13952caa5d4
Feng, Xian
b1a28be8-c603-4239-9c93-b2c14274e9c7
Tanabe, Setsuhisa
84d497b1-4aca-480f-bbf1-e13952caa5d4

Feng, Xian and Tanabe, Setsuhisa (2002) Spectroscopy and crystal-field analysis for Cr(IV) in alumino-silicate glasses. Optical Materials, 20 (1), 63-72. (doi:10.1016/S0925-3467(02)00048-4).

Record type: Article

Abstract

Racah parameters of Cr4+ ions in alumino-silicate glasses have been calculated, indicating most Cr4+ ions are located at low-field sites. Using three-peak Gauss fitting for the luminescence lineshape of Cr4+:alumino-silicate glass at low temperatures, the existence of Cr4+ at high-field sites has been demonstrated for the first time in the alumino-silicate glass. The temperature dependence of the emission of low-Cr2O3 glass shows blue shift because most of the Cr4+ ions are in the low-field sites; in which the Cr4+ ions show the large difference of the thermal population at different excited states due to the non-radiative processes. On the other hand, the concentration dependence of the emission of Cr4+ ions in alumino-silicate glass shows red shift, caused by the energy transfer between Cr4+ ions in different crystal-field sites, and subsequently the mechanism of energy transfer between Cr4+ ions at low-field sites and at high-field sites has been proposed.

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More information

Published date: August 2002
Keywords: optical materials, crystal field, Cr(IV), transition-metal ions
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 376518
URI: http://eprints.soton.ac.uk/id/eprint/376518
PURE UUID: 761dcaee-b7a1-441f-9311-f6740547dfbe

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Date deposited: 24 Apr 2015 09:14
Last modified: 14 Mar 2024 19:44

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Contributors

Author: Xian Feng
Author: Setsuhisa Tanabe

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