[The upconversion luminescence characteristics of Ho3+/Yb3+ codoped ZrO2-ZnO].
[The upconversion luminescence characteristics of Ho3+/Yb3+ codoped ZrO2-ZnO].
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DOI：
10.3964/j.issn.1000-0593(2010)06-1456-04
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发表时间：
2010-06
期刊：
影响因子：
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通讯作者：
Xianghua Zhang;Siwei Yang;Qing-lei Ding;Zheng-wei Liu
中科院分区：
文献类型：
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作者：
Xianghua Zhang;Siwei Yang;Qing-lei Ding;Zheng-wei Liu
采用固相反应法制备了Ho3+/Yb3+共掺杂ZrO2-ZnO粉末样品。本文报道了Ho3+ /Yb3+共掺杂ZrO2-ZnO粉末的上转换发光。在室温下检测到的激发光谱显示出三个以540、671和762 nm为中心的激发峰，分别对应于Ho3+离子的5S2/5F4—> I8、5fs—> 5 I8和5S2/5F4—> 5 I7或5i4—> 5 I8。稀土离子的含量对上转换发光性能有影响。当Ho3+含量为0.1 mol%时，随着Yb3+含量的增加，红、绿发光强度先减小后增大，红外光发光强度先增大后减小。此外，绿色发射强度与红色发射强度之比降低。当Yb3+含量为4.7 mol%时，随着Ho3+含量的增加，所有发光强度都降低，但绿色发光强度与红色发光强度的比值基本不变。logI - logP曲线表明，所有的上转换发光都是双光子过程。并介绍了样品的上转换机理。XRD谱图表明，样品粉末均匀。
Samples of Ho3+/Yb3+ codoped ZrO2-ZnO powder were prepared by a solid-state reaction. Upconversion luminescence of Ho3+ /Yb3+ codoped ZrO2-ZnO powders was reported in the present paper. The excitation spectrum detected at room temperature suggests three excitation peaks centered at 540, 671 and 762 nm respectively, corresponding to 5S2/5F4 --> I8, 5 Fs --> 5 I8, and 5S2/5 F4 --> 5 I7 or 5 I4 --> 5 I8 of Ho3+ ions. The contents of rare-earth ions could influence the property of upconversion lumunescence. When the Ho3+ content was 0.1 mol%, with the increase in Yb3+ content, the intensity of red luminescence and green luminescence decreased first and then increased, but the intensity of infrared luminescence increased first and then decreased. Furthermore, the ratio of the intensity of green emission to red emission decreased. When the Yb3+ content was 4.7 mol%, with the increase in Ho3+ content, the intensity of all emission decreased, but the ratio of the intensity of green emission to red emission was almost constant. The logI - logP curve shows that all the upconversion luminescence is double-photon processes. And the upconversion mechanisms of the samples were introduced. It is shown from the XRD spectrum that the powder of samples is uniform.