Dual-emissive Eu3+, Tb3+ co-doped Gd2(MoO4)3 phosphor for optical thermometry application
Dual-emissive Eu3+, Tb3+ co-doped Gd2(MoO4)3 phosphor for optical thermometry application
复制标题
用于光学测温应用的双发射 Eu3 、Tb3 共掺杂 Gd2(MoO4)3 荧光粉
DOI：
10.1016/j.jpcs.2021.110032
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发表时间：
2021-03-11
影响因子：
4
通讯作者：
Xu, Yan
中科院分区：
文献类型：
--
作者：
Han, Le;Liu, Jiaqiang;Xu, Yan
基于双发光中心的比率式荧光传感材料因其高度稳定的自校准监测性能而得到广泛研究。本工作通过简单的沉淀法和后续的热处理工艺，成功地制备了Eu3+，Tb3+共掺的Gd-2(MoO4)(3)]荧光粉。Gd-2(MoO4)(3)：Eu3+，Tb3+双发射荧光粉分别在592,617和703 nm处出现特征发射峰，分别对应于Eu3+离子的D-5(0)-F-7(1)，D-5(0)-F-7(2)和D-5(0)-F-7(4)跃迁，488和543 nm的发射分别归因于Tb3+的D-5(4)-F-7(6)和D-5(4)-F-7(5)跃迁。研究了Gd-2(MoO_4)(3)：Eu~(3+)，Tb~(3+)多模荧光强度比(FIR)技术在80-450K温度范围内的温度灵敏度，获得了I-Tb(3+)/I-Eu(3+)四种模式的最大相对灵敏度(0.37-0.50%K-1)。结果还表明，Gd-2(MoO4)(3)：Eu3+，Tb3+荧光粉作为热敏用自校准温度计具有很高的可逆性。
Ratiometric fluorescent sensing materials based on dual-emissive luminescent centers have been widely researched due to their highly stable self-calibrating monitoring performance. In this work, Eu3+, Tb3+ co-doped gadolinium molybdate [Gd-2(MoO4)(3)] phosphors were successfully prepared through a facile precipitation and a following heat treatment process. Dual-emissive Gd-2(MoO4)(3): Eu3+, Tb3+ phosphor showed characteristic emission peaks at 592, 617, and 703 nm corresponding to the transitions of D-5(0)-F-7(1), D-5(0)-F-7(2) and D-5(0)-F-7(4) for Eu3+ ions, and the other emissions at 488 and 543 nm were ascribed to D-5(4)-F-7(6) and D-5(4)-F-7(5) transitions for Tb3+, respectively. The temperature sensitivities of Gd-2(MoO4)(3): Eu3+, Tb3+ based on a multimode fluorescence intensity ratio (FIR) technique were investigated for monitoring temperature changes in the range of 80-450 K. The maximum relative sensitivities of the four modes of FIR (I-Tb(3+)/I-Eu(3+)) techniques were successfully achieved with range of 0.37-0.50% K-1. The results also demonstrated the high reversibility of Gd-2(MoO4)(3): Eu3+, Tb3+ phosphor used as a self-calibrating thermometer for thermal-sensing application.