Luminescence properties of Sm3+ ions doped heavy metal oxide tellurite-tungstate-antimonate glasses

被引:48
作者
Rao, V. Himamaheswara [1 ]
Prasad, P. Syam [1 ]
Babu, M. Mohan [1 ]
Rao, P. Venkateswara [2 ]
Santos, Luis F. [3 ]
Raju, G. Naga [4 ]
Veeraiah, N. [4 ]
机构
[1] Natl Inst Technol Warangal, Dept Phys, Warangal 506004, Telangana, India
[2] Univ West Indies, Dept Phys, Mona Campus, Kingston 7, Jamaica
[3] Univ Tecn Lisboa, Ctr Quim Estrut DEQ, Inst Super Tecn, Ave RoviscoPais 1, P-1049001 Lisbon, Portugal
[4] Acharya Nagarjuna Univ, Dept Phys, Guntur 522510, AP, India
关键词
Tellurite glasses; Sm3+ ions; Photoluminescence spectra; Radiative parameters; Decay profile; JUDD-OFELT PARAMETERS; SPECTROSCOPIC PROPERTIES; OPTICAL-PROPERTIES; RADIATIVE PROPERTIES; PHOTOLUMINESCENCE PROPERTIES; LITHIUM BORATE; WHITE-LIGHT; EMISSION; PHOSPHATE; ABSORPTION;
D O I
10.1016/j.ceramint.2017.09.028
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The trivalent Sm3+ ion doped tellurium-antimony-tungsten oxides based glasses were prepared by conventional melt quenching and pressing method. Spectroscopic characterizations such as optical absorption, photoluminescence and decay profile measurements were performed on the glasses. Judd-Ofelt theory is used to evaluate the oscillator strengths and the three phenomenological intensity parameters (Omega(lambda), lambda = 2, 4, 6) of the glasses. The photoluminescence spectra recorded under 479 nm excitation exhibited the emission bands at 562, 598, 645 and 708 nm corresponding to the transitions (4)G(5/2) -> H-6(J) (J = 5/2, 7/2, 9/2, 11/2) respectively. Using J-O parameters (Omega(lambda)) various important radiative parameters viz., transition probabilities, emission cross-sections, branching ratios of various emission bands were evaluated. Decay profiles were recorded to find the lifetime of the (4)G(5/2) excited level and the obtained life time values are observed to decrease with an increase of Sm3+ ion concentration; such decrease is attributed due to clustering of Sm3+ ions which may cause luminescence quenching.
引用
收藏
页码:16467 / 16473
页数:7
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