Oxygen influence on luminescence properties of rare-earth doped NaLaF4

被引：20

作者：

Tuomela, A. ^{[1
]}

Pankratov, V. ^{[1
]}

Sarakovskis, A. ^{[2
]}

Doke, G. ^{[2
]}

Grinberga, L. ^{[2
]}

Vielhauer, S. ^{[3
]}

Huttula, M. ^{[1
]}

机构：

[1] Univ Oulu, Res Ctr Mol Mat, POB 3000, FIN-90014 Oulu, Finland

[2] Univ Latvia, Inst Solid State Phys, 8 Kengaraga, LV-1063 Riga, Latvia

[3] Univ Tartu, Inst Phys, Riia 142, EE-51014 Tartu, Estonia

来源：

JOURNAL OF LUMINESCENCE | 2016年 / 179卷

基金：

芬兰科学院;

关键词：

NaLaF4; Er3+; Eu3+; Luminescence; VUV spectroscopy; Synchrotron radiation; UP-CONVERSION; ENERGY-TRANSFER; ER3+; EFFICIENT; GREEN; IONS; YB3+;

D O I：

10.1016/j.jlumin.2016.06.021

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Luminescence properties of erbium and europium doped NaLaF4 with different oxygen content have been studied. Vacuum ultraviolet (VUV) excitation luminescence spectroscopy technique has been applied by using synchrotron radiation excitation. It was found that oxygen impurity leads to significant degradation of Er3+ or Eu3+ emission under VUV excitation. The intensive O2--Er3+ charge transfer excitation band has been detected from oxygen abundant NaLaF4 in the 150-165 nm spectral range. This band reveals a competing absorption mechanism in oxygen containing NaLaF4. It is clearly demonstrated that one reason for the Er3+ emission degradation in oxygen abundant NaLaF4 is strong suppression of 4f-5d transitions. in Er3+ ion. The degradation of the Eu3+ emission under VUV excitation was explained by diminishing of F--Eu3+ charge transfer absorption band as well as by competing relaxation centers in the oxygen abundant NaLaF4. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：16 / 20

页数：5

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