Synthesis and photoluminescent properties of the Dy 3+ doped YSO as a high-temperature thermographic phosphor
Synthesis and photoluminescent properties of the Dy 3+ doped YSO as a high-temperature thermographic phosphor
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DOI：
10.1016/j.jlumin.2017.12.072
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发表时间：
2018-05
影响因子：
3.6
通讯作者：
Liudmyla M. Chepyga;Ellen Hertle;Amjad Ali;L. Zigan;A. Osvet;C. Brabec;M. Batentschuk
中科院分区：
文献类型：
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作者：
Liudmyla M. Chepyga;Ellen Hertle;Amjad Ali;L. Zigan;A. Osvet;C. Brabec;M. Batentschuk
采用LiF和B2 O3两种助熔剂高温固相法和异丙醇盐辅助共沉淀金属醇盐溶胶-凝胶法制备了Dy 3+掺杂的Y2 SiO 5（YSO）荧光粉，并对其在高温测温中的应用进行了探索。实验观察到LiF助熔剂的使用由于微晶的晶体质量的改善和Li+和F-离子的共掺杂而影响发光性能。在此，已经开发了涉及使用不同通量和浓度的Dy 3+离子的策略，以实现高光致发光（PL）强度和不同PL峰的高强度比。掺入LiF的情况下，在主机晶格显示的YSO：Dy（在293 K高出三倍以上）的发光强度的强烈增强与B2 O3合成的磷光体的发光强度相比。基于高温测量的结果，可以说YSO：Dy是用于高温测量的有利磷光体，具有与YAG：Dy相当的温度灵敏度范围，但具有较低的PL衰减时间，其减少约60%。对于高达1250 K的温度，强度比方法提供了更好的测量能力，而对于衰减时间方法，1250 K以上的温度灵敏度是上级的。
Dy3+-doped yttrium orthosilicate (Y2SiO5,abbreviated YSO) phosphors were synthesized: (1) by conventional high temperature solid-state method using two types of fluxes: lithium fluoride (LiF) and boron oxide (B2O3); (2) by metal alkoxide sol-gel method using isopropoxide assisted co-precipitation with subsequent annealing to explore its possible application in high-temperature thermometry. It was experimentally observed that the use of LiF flux affects the luminescent properties due to improvement of the crystal quality of crystallites and co-doping Li+and F-ions. Herein, a strategy involving the use of different fluxes and concentration of Dy3+ions has been developed to achieve high photoluminescence (PL) intensity and high intensity ratio of different PL peaks. The case of incorporated LiF in the host crystal lattices revealed strong enhancement of luminescence intensity of YSO:Dy (more than three times higher at 293 K) compared to the luminescence intensity of the phosphors synthesized with B2O3. Based on the results of high temperature measurements, it can be stated that YSO:Dy is a favorable phosphor for high temperature measurement, with a temperature sensitivity range comparable to YAG:Dy but with a lower PL decay time which is reduced by about 60%. For temperatures up to 1250 K the intensity ratio approach offers better measurement capabilities while the temperature sensitivity above 1250 K is superior for the decay time approach.