Phase-dependent photoluminescence behavior of Cr-doped alumina phosphors

Lu Shen; Chunfeng Hu; Shenghu Zhou; Amiya Mukherjee; Qing Huang

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Phase-dependent photoluminescence behavior of Cr-doped alumina phosphors

机译：Cr掺杂氧化铝荧光粉的相变光致发光行为

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Cr-doped amorphous,γ. θ and α-alumina phosphors are carefully synthesized and comprehensively studied to reveal correlations between crystal structure, doping concentration and photoluminescence property. All phosphors exhibit characteristic phase dependent emission behavior: their luminescence intensity and peak position are found to be closely dependent on crystal structure of alumina phases. Luminescence intensity and critical quenching concentration increase drastically with phase transition sequence of amorphous-γ-θ-α. Crystal field parameters are extracted from UV-Vis spectra and the calculated Dq/B values of all alumina phases are larger than 2.3. An alternative possible emission mechanism for γ and θ alumina is deduced from the emission character.

机译：Cr掺杂非晶，γ。仔细合成和综合研究了θ和α-氧化铝荧光粉，揭示了晶体结构，掺杂浓度和光致发光性能之间的关系。所有磷光体均表现出特征性的相位依赖性发射行为：发现它们的发光强度和峰值位置与氧化铝相的晶体结构密切相关。发光强度和临界淬灭浓度随着非晶态-γ-θ-α的相变序列而急剧增加。从UV-Vis光谱中提取出晶体场参数，并且所有氧化铝相的Dq / B值均大于2.3。从发射特性推论出γ和θ氧化铝的另一种可能的发射机理。

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来源
《Optical Materials》 |2013年第6期|1268-1272|共5页
作者
Lu Shen; Chunfeng Hu; Shenghu Zhou; Amiya Mukherjee; Qing Huang;
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作者单位

Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201. China;

Department of Chemical Engineering & Materials Science University of California Davis CA 95616 USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
phase structure; photoluminescence; alumina; Cr-doping;

机译：相结构光致发光氧化铝铬掺杂;

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Phase-dependent photoluminescence behavior of Cr-doped alumina phosphors

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