Open AccessPhotoluminescence and upconversion emission of Er3+/Yb3+ codoped tungsten tellurite oxyfluoride glasses
Author(s) -
Ghizal F. Ansari,
J. Parashar,
S. K. Mahajan
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1913/1/012034
Subject(s) - photon upconversion , photoluminescence , materials science , analytical chemistry (journal) , tungsten , ion , absorption (acoustics) , excitation , quenching (fluorescence) , fluorescence , emission spectrum , photoluminescence excitation , doping , optoelectronics , optics , chemistry , spectral line , physics , organic chemistry , chromatography , quantum mechanics , astronomy , metallurgy , composite material
The codoped YbF 3 / ErF 3 with the optimum composition of TeO 2 -Li 2 O-WO 3 (TWLEYF) oxyfluoride glasses in which minimizing the fluoride contain were synthesized by melt quenching technique. UV-Vis absorption spectrum of the sample was measured for identification of the absorption levels of Er 3+ /Yb 3+ ions in the glass. Photoluminescence of glass sample produced the intense broad blue emission of Er 3+ (2mol%) under UV excitation at 380nm. The intense green upconversion at 535nm and weak green at 550nm under 800nm excitation has been measured. Also, a weak blue and red upconversion emission band of Er 3+ ions was observed. Further for 2 mol% of YbF 3 in TWLEYF samples is attributed to enhance 535nm emission due to energy-transfer process while the red emission is based on non-resonant energy transfer performs. At room temperature green fluorescence decay times of 4 S 11/2 level of Er 3+ ions under 488nm pulse excitation duration at rate < 10ns have been measured. Moreover, 530nm upconversion emission process of tungsten tellurite oxyfluoride glasses were discussed which would be useful for optical devices.