Luminescence and thermal lensing characterization of singly Eu3+ and Tm3+ doped Y2O3 transparent ceramics

Luminescence and thermal lensing characterization of singly Eu3+ and Tm3+ doped Y2O3 transparent ceramics
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单掺Eu3和Tm3 Y2O3透明陶瓷的发光和热透镜表征

DOI:
10.1016/j.jlumin.2015.01.003
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发表时间:
2015
影响因子:
3.6
通讯作者:
Jacinto, C.
Jacinto, C.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Poma, P.Y.;Kumar, K. Upendra;Vermelho, M.V.D.;Serivalsatit, K.;Roberts, S.A.;Kucera, C.J.;Ballato, J.;Jacobsohn, L.G.;Jacinto, C.

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采用高温高压连续固结的方法制备了单掺Eu3+或Tm3+的Y2O3光透明陶瓷。对这些陶瓷的发光和热透镜行为进行了表征,并将结果与文献报道的单晶数据进行了比较。获得了1.0Mol%Eu3+和0.5Mol%Tm3+单掺杂Y2O3透明陶瓷的热扩散系数D和电导率K值分别为26×10−3 cm~2/S和K=5.8W/m·K。这些值大约是单晶类似物的一半。测得光程长度变化的小温度系数ds/dt=3×10−6K−1,使这些材料适合于需要近乎无热响应的应用。通过贾德-奥菲尔分析获得了选定的光谱性质,并与热透镜结果一起提供了几个能级的荧光量子效率的绝对值,特别是Eu3+的5D0能级的62%和Tm3+的3F4能级的84%。
Transparent Y2O3ceramics singly-doped with either Eu3+or Tm3+were fabricated by means of sequential consolidation steps at high pressure and temperature. These ceramics were characterized for their luminescence and thermal lensing behaviors, and the results compared to data on single crystals reported in literature. Thermal diffusivity,D, and conductivity,K, values ofD=26×10−3cm2/s andK=5.8 W/m K, respectively, for 1.0 mol% Eu3+and 0.5 mol% Tm3+singly-doped Y2O3transparent ceramics were obtained. These values are about half of those for single crystal analogs. A small temperature coefficient of the optical path length change,ds/dT=3×10−6K−1, was determined, making these materials suitable for applications requiring nearly athermal response. Selected spectroscopic properties were obtained by means of Judd–Ofelt analysis and together with thermal lens results provided absolute values for the fluorescence quantum efficiency of several levels, particularly 62% for the5D0level of Eu3+and 84% for the3F4level of Tm3+.
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