Red luminescence of Cr in Β- Ga2 O3 nanowires

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作者：
Nogales, Emilio [1 ]
García, Joś A. [2 ]
&#7742ndez, Bianchi [1 ]
Piqueras, Javier [1 ]
机构：
[1] Departamento de Física de Materiales, Universidad Complutense de Madrid, Madrid 28040, Spain
[2] Departamento de Física Aplicada II, Universidad Del País Vasco, Apdo. 644, Bilbao 48080, Spain
来源：
Journal of Applied Physics | 2007年 / 101卷 / 03期
关键词：
Red luminescence emission from chromium doped Β- Ga2 O3 nanowires has been studied by means of photoluminescence (PL) techniques. PL excitation shows several bands in the ultraviolet-visible region. Time decay values; obtained by time resolved PL; at different temperatures fit a three level model with thermal population of the upper level from the middle one. From the results; the origin of the emission is assigned to Cr3+ ions in the Β- Ga2 O3 host; and values for the energy level separation and Huang-Rhys factor of the broad T24 - A24 emission are estimated. © 2007 American Institute of Physics;
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