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Evaluation of TeO2 content on the optical and spectroscopic properties of Yb3 +-doped calcium borotellurite glasses.
- Source :
-
Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy . Mar2018, Vol. 193, p212-218. 7p. - Publication Year :
- 2018
-
Abstract
- This paper reports the synthesis and the characterization of Yb 3 + -doped calcium borotellurite (CaBTeX) glasses with composition 10CaF 2 –(29.5 − 0.4x)CaO–(60 − 0.6x)B 2 O 3 –xTeO 2 –0.5Yb 2 O 3 (x = 10, 16, 22, 31 and 54 mol%). The results of XRD confirm the amorphous character of all the samples. The density, molar volume, refractive index and electronic polarizability values show an increase with TeO 2 content. Otherwise, the optical band gap energy shows a decrease with the increase of TeO 2 content. The replacement of CaO and B 2 O 3 by TeO 2 changes the glass structure, which decreases the excited Yb 3 + /cm 3 and, consequently, the luminescence intensity. The temperature dependence of luminescence was studied for all the samples up to 420 K. The fluorescence lifetime does not change significantly due to TeO 2 addition. In addition, absorption and emission cross section were calculated and present high values as compared to other tellurite and phosphate glasses. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CALCIUM
*OPTICAL glass
*AMORPHOUS semiconductors
*X-ray diffraction
*FLUORESCENCE
Subjects
Details
- Language :
- English
- ISSN :
- 13861425
- Volume :
- 193
- Database :
- Academic Search Index
- Journal :
- Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy
- Publication Type :
- Academic Journal
- Accession number :
- 127792697
- Full Text :
- https://doi.org/10.1016/j.saa.2017.12.032