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Spectroscopic properties of Dy3+ doped MgO-LiF-CdO-P2O5 glasses

D. VISWESWARA RAO1, CH. MOHANA KUMAR1, G. SRINIVAS2,3, R. K. N. R. MANEPALLI4, R. RAMESH RAJU5, G. GIRIDHAR1,*

Affiliation

  1. Department of Nanotechnology, Acharya Nagarjuna University, Nagarjunanagar – 522 510, AP India
  2. Ibra College of Technology, Ibra, Sultanate of Oman
  3. K L University, Vaddeswaram, Guntur(D.T), Andhra Pradesh, India
  4. Department of Physics, The Hindu College, Machilipatnam, AP India
  5. Department of Chemistry, Acharya Nagarjuna University, Nagarjunanagar – 522 510, AP India

Abstract

Spectroscopic properties of 60 P2O5 – 20 CdO – x MgO – (20-x) LiF – y Dy2O3+ x=5,10,15 and y = 0.01, 0.03, 0.05, 0.08 and 0.1 glasses were studied. Their characteristic bands were observed in optical absorption spectra from ground state 6H15/2 to different excited states. By using Judd–Ofelt (J–O) intensity parameters Ωλ (λ=2,4 and 6) various spectroscopic parameters have been evaluated to characterize the absorption and luminescence spectra of these glasses. For an excitation maximum at 348nm, emission spectra show three emission bands in visible region at 483nm, 573nm and 662nm corresponding to4F9/2-6H15/2, 4F9/2-6H13/2, and 4F9/2-6H11/2 transitions respectively which are shown by energy level diagram. The relative emission intensity ratio can be tuned by varying the concentrations of activator and/or composition of glass matrix..

Keywords

Luminescence, Phosphate Glass, White light Emission, Judd-Ofelt parameters.

Citation

D. VISWESWARA RAO, CH. MOHANA KUMAR, G. SRINIVAS, R. K. N. R. MANEPALLI, R. RAMESH RAJU, G. GIRIDHAR, Spectroscopic properties of Dy3+ doped MgO-LiF-CdO-P2O5 glasses, Optoelectronics and Advanced Materials - Rapid Communications, 11, 11-12, November-December 2017, pp.691-696 (2017).

Submitted at: Oct. 24, 2016

Accepted at: Nov. 28, 2017