Improved luminescence and temperature sensing performance of Ho3+-Yb3+-Zn2+:Y2O3 phosphor
Improved luminescence and temperature sensing performance of Ho3+-Yb3+-Zn2+:Y2O3 phosphor
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DOI：
10.1039/c3dt50592h
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发表时间：
2013-01-01
影响因子：
4
通讯作者：
Rai, Vineet Kumar
中科院分区：
文献类型：
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作者：
Pandey, Anurag;Rai, Vineet Kumar
研究了在980 nm和448 nm激发下，通过低温燃烧法制备的Y₂O₃:Ho³⁺ - Yb³⁺荧光粉中Zn²⁺离子的共掺杂对其在可见光和近红外（NIR）区域发光的影响。通过X射线衍射分析确定了所制备荧光粉的物相和晶粒尺寸，并通过泵浦功率依赖性、衰减曲线分析以及合适的能级图详细讨论了上转换机制所涉及的过程。还通过测量中心位于465 nm和491 nm的蓝色上转换发射带在高达673 K时的荧光强度比，研究了所开发材料的温度传感性能。研究发现，利用荧光强度比技术，该荧光粉材料可实现对温度测量的可观灵敏度，这表明它可作为高温传感探针应用。还提出了使用所开发的荧光粉材料制造绿色发光二极管的建议。
The codoping effect of Zn2+ ions on luminescence emission in visible and near infrared (NIR) regions of Y2O3:Ho3+-Yb3+ phosphor prepared by low temperature combustion process have been investigated under 980 nm and 448 nm excitations. The phase and crystallite size of the prepared phosphor were determined by X-ray diffraction analysis and processes involved in the upconversion mechanism have been discussed in detail via pump power dependence, decay curve analysis and a suitable energy level diagram. The temperature sensing performance of the developed material has also been investigated by measuring the fluorescence intensity ratio of the blue upconversion emission bands centred at 465 nm and 491 nm up to 673 K. It is found that by using fluorescence intensity ratio technique, appreciable sensitivity for temperature measurement can be achieved from the present phosphor material, which indicates its applicability as a high temperature sensing probe. The fabrication of green LEDs using the developed phosphor material has also been suggested.