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Synthesis, characterization and formation mechanism of quasi-spherical Gd2O2S:Pr3 + phosphor by sulfurization of oxide powder using ammonium thiocyanate and argon gas

HUILIN QU1,2, JINGBAO LIAN1,2,* , NIANCHU WU1,2, XUE ZHANG1,2, JIAO HE1,2

Affiliation

  1. School of Mechanical Engineering, Liaoning Petrochemical University, Fushun, 113001, P.R. China
  2. New Functional Materials Laboratory, Liaoning Petrochemical University, Fushun, 113001, P.R. China

Abstract

Quasi-spherical Gd2O2S:Pr3+ green phosphor was successfully synthesized via sulfurization of oxide powders using ammonium thiocyanate and argon gas. XRD analysis shows that the Gd2O2S powder is pure phase after calcination and sulfurization. FE-SEM shows that the precursor can eventually be transformed into quasi-spherical Gd2O2S powder with an average size of 150 nm. Moreover, the formation mechanism of Gd2O2S has also been proposed. PL analysis shows that the emission spectrum of Gd2O2S:1.00%Pr3+ exists strong green emission band centered at 513 nm upon excitation at 460 nm light, and its corresponding CIE coordinate is (0.331, 0.564)..

Keywords

Rare earth oxysulfide, Phosphors, Sulfurization, Ammonium thiocyanate, Photoluminescence.

Submitted at: Oct. 19, 2021
Accepted at: Aug. 10, 2022

Citation

HUILIN QU, JINGBAO LIAN, NIANCHU WU, XUE ZHANG, JIAO HE, Synthesis, characterization and formation mechanism of quasi-spherical Gd2O2S:Pr3 + phosphor by sulfurization of oxide powder using ammonium thiocyanate and argon gas, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 7-8, pp. 385-394 (2022)