npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041
Qrcode

Article

Research Paper

New Physics: Sae Mulli 2016; 66: 1255-1259

Published online October 31, 2016 https://doi.org/10.3938/NPSM.66.1255

Copyright © New Physics: Sae Mulli.

Formation and Photoluminescence of Eu$^{3+}$-Doped Y$_2$O$_3$ + H$_3$PO$_3$ Powders Produced by Using the Mechanochemical Method

Hyun-Goo KIM*

Department of Physics Education, Chosun University, Gwangju 61452, Korea

Correspondence to:hgakim@chosun.ac.kr

Received: June 30, 2016; Revised: August 29, 2016; Accepted: August 30, 2016

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Y$_2$O$_3$ + H$_3$PO$_3$:Eu$^{3+}$ powders were synthesized by using the high-energy ball-milling (HEBM) method, and their structural and photoluminescence (PL) characteristics were investigated by using X-ray diffractometry (XRD), thermogravimetric/differential thermal analysis (TG/DTA), and photoluminescence spectrometry. The crystallite size of the powder mixture milled for 300 min by using the Willaimson?Hall method was approximately 89.0 nm with a strain of 3.52 $\times$ 10$^{-3}$. The TG-DTA curve for the sample powder with 6-mol% Eu$^{3+}$ had three exothermic peaks, and the total weight reduction rates were 7.30% (71 $^\circ$C), 3.36% (330 $^\circ$C), and 1.82% (446 $^\circ$C). When the molar ratio of the Eu$^{3+}$ concentration was 6.0 mole%, the emission intensity of the Eu$^{3+}$-doped Y$_2$O$_3$ + H$_3$PO$_3$ mixture was higher than it was for the other molar ratios. The most intence PL peaks were observed for the Eu$^{3+}$-doped Y$_2$O$_3$ + H$_3$PO$_3$ mixture with 6 mol% Eu after annealing at 800 $^\circ$C for 1 h. The photoluminescence peaks of the powder mixture excited to 400 nm were detected near 591 nm ($^5$D$_o$ $\rightarrow$ $^7$F$_1$), 615 nm ($^5$D$_o$ $\rightarrow$ $^7$F$_2$), 654 nm ($^5$D$_o$ $\rightarrow$ $^7$F$_3$), and 700 nm ($^5$D$_o$ $\rightarrow$ $^7$F$_4$). 

Keywords: High-energy ball milling, Y$_2$O$_3$ + H$_3$PO$_3$:Eu$^{3+}$, Williamson-Hall method, Photoluminescence