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Synthesis and photoluminescence of Eu3+-doped LiZnVO4 nanopowders

M. H. HUANG1, T. H. FANG1,* , Y. C. FAN1, M. H. LIN1

Affiliation

  1. Department of Mechanical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan

Abstract

The optical and structural properties of europium-doped lithium zinc vanadium oxide (LiZnVO4:xEu) nanopowders, synthesized via a solid-state reaction, were studied. X-ray diffraction indicates that a rhombohedral LiZnVO4 phase began to appear when annealing at 500ºC. The bandgap energy of pure and Eu3+-doped LiZnVO4 was around 3.20 and 3.22 eV, respectively. The photoluminescence spectra of pure LiZnVO4 exhibit a strong emission peak at 526 nm when annealed at 600ºC. For the Eu3+-doped LiZnVO4 samples, the new emission peaks appear at 618 nm as the concentration of Eu3+ ions increases. The intensity of the emission peaks at 618 nm increases due to the 5D0→7F2 transition. The CIE (Commission International de l'Éclairage) color coordinates of LiZnVO4:xEu3+ (x = 0 mol%, 1 mol%, 3 mol%, 5 mol%, and 7 mol%) change from x = 0.262 and y = 0.457 to x = 0.264 and y = 0.437..

Keywords

Solid-state reaction method, Emission peaks, The bandgap energy.

Submitted at: June 19, 2020
Accepted at: Oct. 5, 2022

Citation

M. H. HUANG, T. H. FANG, Y. C. FAN, M. H. LIN, Synthesis and photoluminescence of Eu3+-doped LiZnVO4 nanopowders, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 9-10, pp. 463-470 (2022)