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Photoluminescence and thermoluminescence properties of Li 2 O‐Na 2 O‐B 2 O 3 glass
Author(s) -
Razak N. A.,
Hashim S.,
Mhareb M. H. A.,
Tamchek N.
Publication year - 2016
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3020
Subject(s) - thermoluminescence , photoluminescence , analytical chemistry (journal) , materials science , amorphous solid , boron , doping , ion , borosilicate glass , borate glass , lithium borate , photon upconversion , luminescence , nuclear chemistry , crystallography , chemistry , optoelectronics , organic chemistry , chromatography , composite material
Influence of Nd 3+ concentration on the optical and thermoluminescence (TL) properties of melt‐annealed synthesized 10 Na 2 O: 20 Li 2 O: (70‐ x ) B 2 O 3 : x Nd 2 O 3 , where 0.1≤ x ≤0.7 (LNB) glasses are determined. The absence of sharp peaks in X‐ray diffraction patterns confirms the amorphous nature of the prepared glasses. The photoluminescence spectra under 800 nm laser excitations at room temperature exhibit three prominent peaks centred at 538, 603 and 675 nm corresponding to the transitions of 4 G 7/2 → 4 I 9/2 , [ 4 G 7/2 → 4 I 11/2 , 4 G 5/2 → 4 I 9/2 ] and [ 4 G 7/2 → 4 I 13/2 , 4 G 5/2 → 4 I 11/2 ], respectively. The TL glow curve exhibits a prominent peak (T m ) at 180°C. The best performance of the prepared glass was found at 0.5 mol% of Nd 2 O 3 . We achieved a good linearity of TL response against dose between 0.5 to 4.0 Gy. The calculated value of the effective atomic number, Z eff , is 7.55 which is nearly tissue equivalent (Z eff = 7.42). These promising features demonstrate the capability of the aforementioned glass to be used as a radiation dosimeter. Copyright © 2015 John Wiley & Sons, Ltd. Highlights The thermoluminescence and optical properties of new compositions of lithium sodium borate glasses doped with Nd 3+ ions were reported. Attractive features were obtained from the TL, PL and UV–Vis light analysis. Three upconversion luminescences permitting green, orange and red emissions were observed.