Composition effect in luminescence properties crystals of Y(NbxTa1-x)O4 mixed crystals

被引：12

作者：

Spassky, D. ^{[1
]}

Vasil'ev, A. ^{[1
]}

Vielhauer, S. ^{[2
]}

Sidletskiy, O. ^{[3
]}

Voloshyna, O. ^{[3
]}

Belsky, A. ^{[4
]}

机构：

[1] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow, Russia

[2] Univ Tartu, Inst Phys, W Ostwaldi Str 1, EE-50411 Tartu, Estonia

[3] NAS Ukraine, Inst Scintillat Mat, Kharkov, Ukraine

[4] Univ Lyon1, CNRS, Inst Light & Matter, Villeurbanne, France

来源：

OPTICAL MATERIALS | 2018年 / 80卷

基金：

瑞典研究理事会;

关键词：

Yttrium tantalate; Yttrium niobate; Mixed crystals; Luminescence; Energy transfer; Thermalization length; SOLID-SOLUTIONS; ENERGY-TRANSFER; X-RAY; IMPROVEMENT; PHOSPHORS; EMISSION; CENTERS; DENSE; LU; SC;

D O I：

10.1016/j.optmat.2018.05.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The luminescence properties of y(NbxTa1-x)O-4 mixed crystals were studied. Local structure modifications arise due to the inhomogeneous distribution of the substitutional ions in the mixed crystal and can be traced using the luminescence spectroscopy. In particular, it is shown that the intensity of exciton emission under interband VUV excitation increases for intermediate values of x with the maximum at x = 0.4 relatively to the intensity observed in the constituents of the mixed crystals-YTaO4 and YNbO4. From the luminescence excitation spectra it follows that the probability of exciton creation from the separated e-h pairs increases for intermediate values of x as well. Using numerical simulation it is shown that the effect is connected with the variation of the thermalization length of hot electrons and holes, which is minimal at x = 0.4.

引用

页码：247 / 252

页数：6

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