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Type :article
Subject :Q Science (General)
Main Author :Muhammad Noorazlan Bin Abd Azis
Additional Authors :Suriani binti Abu Bakar
Azlina Yahya
Halimah Mohamed Kamari
Umar Saad Aliyu
El-Mallawany, R.
Title :Upconversion properties of erbium nanoparticles doped tellurite glasses for high efficient laser glass
Place of Production :Tanjong Malim
Publisher :Fakulti Sains dan Matematik
Year of Publication :2019
Corporate Name :Universiti Pendidikan Sultan Idris

Abstract : Universiti Pendidikan Sultan Idris
Erbium nano particles (NPs) doped tellurite glasses were prepared via melt-quenched technique and their chemical composition are as follows; {[(TeO 2 ) 0.70 (B 2 O 3 ) 0.30 ] 0.7 (ZnO) 0.3 } y (Er 2 O 3 NPs) 1−y , y = 0.005, 0.01, 0.02, 0.03, 0.04 and 0.05. The amorphous state of the glass system was revealed and the  structural parameters indicating the formation of non-bridging  oxygen was shown. The current work underlines the spectral parameters from Judd–Ofelt (JO) studies, and upconversion spectra. The existence of erbium NPs was found experimentally using transmission electron microscopy (TEM). The Judd–Ofelt analysis suggests that the radiative probability, A rad is strong at ² H 11?2 —> ? I 15?2 and a longer lifetime at ? I 11?2 —> ? I 15?2 . The Argon laser beam was used to determine the upconversion emission peaks. The upconversion radiation emission excited at 800 nm was found in the range 390 nm.  
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