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Influence of Temperature on the Green-to-Blue Up-Conversion Emission from U4+Ion in Single-Crystal Cs2ZrCl6

Authors
Journal
Journal of Solid State Chemistry
0022-4596
Publisher
Elsevier
Publication Date
Volume
116
Issue
1
Identifiers
DOI: 10.1006/jssc.1995.1191

Abstract

Abstract The blue emission from U 4+(5 f 2) ion doped into a Cs 2ZrCl 6 single crystal under green light (19,436 cm -1) excitation has been observed and characterized. Five blue emission bands for the intra 5 f 1 I 6 → 3 H 4 (19,700, 20,010, and 20,280 cm -1) and 3 P 2 → 3 H 4 (20,700 and 20,970 cm -1) U 4+ transitions have been observed. The up-conversion efficiencies for the 1 I 6 and 3 P 2 emissions have been estimated as a function of temperature; that for 3 P 2 emission increases with increasing temperature. We suggest that this result is due to an increasing population of the 3 P 2 level caused by thermal excitation of U 4+ ions in the 1 I 6 level.

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