Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1088, Issue -, Pages 147-154Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2015.02.021
Keywords
Rare earth doped glasses; FTIR and Raman spectra; UV-Vis spectroscopy; Hydrogenic excitonic model
Categories
Funding
- UGC (SAP), New Delhi
- DST(FIST), New Delhi
- DRDO (IRDE) Dehradun
- Guru Jambheshwar University of Science and Technology
- UGC
Ask authors/readers for more resources
Nd3+ ions doped Barium-Tellurite-Borate glasses with compositions xNd(2)O(3) - (100 - x)[0.1BaO-0.4TeO(2)-0.5B(2)O(3)]; x = 0.0, 0.5, 1.0, 1.5 and 2.0 have been prepared by melt-quench technique. The amorphous nature of as-prepared glasses has been confirmed by X-ray diffraction patterns. The density, molar volume and equivalent crystalline volume of the glass samples have been found to increase with the increase in concentration of Nd2O3. FTIR and Raman spectra of the prepared glasses indicate that Nd2O3 acts as glass modifier and as the content of Nd2O3 increases, BO4 structural units are converted into BO3 structural units. The values of optical band gap have been estimated from the fitting of Mott and Davis's model with the experimentally observed absorption spectra. The experimentally observed spectra of absorption coefficient also show good agreement with the hydrogenic excitonic model and the values of different parameters like optical band gap, excitonic binding energy, line width of m = 1 state and line width of continuum have been estimated from theoretical fitting of this model. The values of optical band gap are observed to decrease with increase in concentration of Nd2O3. (C) 2015 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available