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首页> 外文期刊>Optical Materials >Dependence of Ce~(3+) - related photo- and thermally stimulated luminescence characteristics on Mg~(2+) content in single crystals and epitaxial films of Gd_3(Ga,Al)_5O_(12):Ce,Mg
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Dependence of Ce~(3+) - related photo- and thermally stimulated luminescence characteristics on Mg~(2+) content in single crystals and epitaxial films of Gd_3(Ga,Al)_5O_(12):Ce,Mg

机译:Ce〜(3+)相关光和热激发发光特性对Gd_3(Ga,Al)_5O_(12):Ce,Mg单晶和外延膜中Mg〜(2+)含量的依赖性

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摘要

Photoluminescence and thermally stimulated luminescence of Gd-3(Ga,Al)(5)O-12:Ce single crystals and epitaxial films co-doped with different concentrations of Mg2+ ions are investigated in the 77-500 K temperature range under excitation in the 4f - 5d(1) and 4f - 5d(2) absorption bands of Ce3+ ions. Influence of Mg2+ ions on the photoluminescence intensity, spectrum, decay kinetics, temperature dependence of the photoluminescence intensity, and the activation energy of luminescence thermal quenching is observed. Co-doping with Mg2+ is shown to result in a drastic reduction of the afterglow and thermally stimulated luminescence and in a strong shortening of the afterglow decay kinetics. It influences also defects creation spectra and the activation energy of the photostimulated defects creation. The Mg2+ - induced changes in the characteristics of the Gd-3(Ga,Al)(5)O-12:Ce, Mg single crystals and epitaxial films are found to be strongly different, and possible reasons of these differences are discussed.
机译:Gd-3(Ga,Al)(5)O-12:Ce单晶和共掺杂了不同浓度的Mg2 +离子的外延膜在77-500 K温度范围内在激发条件下进行了光致发光和热激发发光研究。 Ce3 +离子的4f-5d(1)和4f-5d(2)吸收带。观察到Mg 2+离子对光致发光强度,光谱,衰减动力学,光致发光强度的温度依赖性以及发光热猝灭的活化能的影响。已显示与Mg2 +的共掺杂会导致余辉的急剧降低和受热激发的发光,并大大缩短余辉的衰减动力学。它也影响缺陷产生光谱和光刺激缺陷产生的活化能。发现Mg2 +诱导的Gd-3(Ga,Al)(5)O-12:Ce,Mg单晶和外延膜的特性变化很大,并讨论了这些差异的可能原因。

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