Bright dual-mode green emission and temperature sensing properties in Er3+/Yb3+ co-doped MgWO4 phosphor
Bright dual-mode green emission and temperature sensing properties in Er3+/Yb3+ co-doped MgWO4 phosphor
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Er3 /Yb3 共掺杂 MgWO4 荧光粉具有明亮的双模绿光发射和温度传感特性
DOI：
10.1039/c6ra09656e
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Yao, Xi
中科院分区：
文献类型：
--
作者：
Chai, Xiaona;Li, Jun;Yao, Xi
采用固相反应法合成了Er3+/Yb3+共掺杂MgWO4荧光粉，并对其物相、光致发光和温度传感性能进行了分析。该荧光粉通过近红外 (980 nm) 激发的上转换过程和 379 nm 激发的下转换过程显示出强烈的可见绿光发射，因此表现为双模式荧光粉。在上转换和下转换发射中，Er3+离子的2H11/2→4I15/2和4S3/2→4I15/2跃迁描绘了温度依赖性行为，并已通过荧光强度比方法用于光学温度传感器。此外，我们还比较了连续温度范围（83-583 K）和上转换过程中两个分段温度范围内的 S 曲线。结果发现，该荧光粉可以在 83–583 K 的温度范围内工作，在 583 K 时的最大灵敏度约为 0.0093 K−1。结果表明，Er3+/Yb3+ 共掺杂 MgWO4 荧光粉是用于显示器件和光学温度传感器的潜在候选者。
Er3+/Yb3+ co-doped MgWO4 phosphor was synthesized by a solid state reaction method and the phase, photoluminescence and temperature sensing properties were analyzed. The phosphor has shown intense visible green emission via up-conversion process on near-infrared (980 nm) excitation and down-conversion process on 379 nm excitation and thus behaves as a dual-mode phosphor. In the up-conversion and down-conversion emission, the 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions of the Er3+ ion portray a temperature dependent behavior and have been used for optical temperature sensor by means of the fluorescence intensity ratio method. Moreover, we compared the curves of S in the continuous temperature range (83–583 K) and the two sectional temperature ranges in up-conversion process. It is found that the phosphor can be operated over a temperature range of 83–583 K with a maximum sensitivity of about 0.0093 K−1 at 583 K. The results indicate that the Er3+/Yb3+ co-doped MgWO4 phosphor is a potential candidate to be used in display devices and optical temperature sensors.