Optical characterization of Er3+-doped zinc fluorophosphate glasses for optical temperature sensors

被引:110
|
作者
Vijaya, N. [1 ]
Babu, P. [2 ]
Venkatramu, V. [3 ]
Jayasankar, C. K. [1 ]
Leon-Luis, S. F. [4 ,5 ]
Rodriguez-Mendoza, U. R. [4 ,5 ]
Martin, I. R. [4 ,5 ]
Lavin, V. [4 ,5 ]
机构
[1] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India
[2] Govt Degree Coll, Dept Phys, Satyaveedu 517588, India
[3] Yogi Vemana Univ, Dept Phys, Kadapa 516003, India
[4] Univ La Laguna, MALTA Consolider Team, San Cristobal La Laguna 38200, Santa Cruz De T, Spain
[5] Univ La Laguna, Dept Fis Fundamental Expt Elect & Sistemas, San Cristobal La Laguna 38200, Santa Cruz De T, Spain
来源
关键词
Er3+; Glasses; Luminescence; Temperature sensibility; GREEN UP-CONVERSION; FLUORESCENCE INTENSITY RATIO; SPECTROSCOPIC PROPERTIES; THERMAL SENSITIVITY; ER3+; LUMINESCENCE; EMISSION; THERMOMETRY; NANOCRYSTALS; CRYSTALS;
D O I
10.1016/j.snb.2013.05.081
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Trivalent erbium doped zinc fluorophosphate glasses have been synthesized and their luminescence properties in the green visible range have been investigated as a function of temperature. The Judd-Ofelt theory has been used to predict the transition probabilities, branching ratios and lifetimes for the various excited states of Er3+ ions in 0.5 mol% of Er2O3-doped glass. The effect of Er3+ concentration on temperature dependent luminescence has been studied for the wide temperature range from room temperature up to 773 K. The fluorescence intensity ratio of the green emissions associated to the two transitions from the thermally coupled H-2(11/2) and S-4(3/2) levels to the I-4(15/2) level of Er3+ ion has been studied as a function of temperature, and in turn used to determine the thermal sensitivity and relative thermal sensitivity of the glasses. In the present study, the maximum value for the thermal sensitivity of 79 x 10(-4) K-1 at 630 K has been obtained for the lowest (0.01 mol%) concentration of Er2O3-doped glass, one of the highest sensitivity found in the literature and quite close to the theoretical sensitivity calculated from the Judd-Ofelt theory. The results reveal that the zinc fluorophosphate glass having relatively low concentration of Er3+ ions can be useful as an optical temperature sensor due to their high sensitivity and the absence of radiative energy transfer processes. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:156 / 164
页数:9
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