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Luminescence investigation of Pr3+-activated InTaO4 red-emitting phosphor for white light emitting diodes

AN TANG1,* , YONG TIAN2, QILI FAN3, XIDONG LIU1

Affiliation

  1. Department of Mechanical Engineering, Henan University of Engineering, Zhengzhou, Henan 451191, China
  2. Department of Mechanical & Electrical Engineering, Henan Mechanical and Electrical Vocational College, Zhengzhou, Henan, 451191, China
  3. Department of Electrical and Electronic Engineering, Zhengzhou Technical College, Zhengzhou Henan 450121, China

Abstract

A series of Pr3+-activated red-emitting phosphors InTaO4:xPr3+ were prepared by a conventional solid-state reaction technique. The structure, the particle size distribution, and photoluminescence properties of these samples have been respectively researched by X-ray diffraction (XRD), laser size distribution analyzer and molecular fluorescence spectrometer. The as-gotten phosphor has a monoclinic crystal structure with single phase and its mean particle size is approximately 2.2μm, which is suitable for manufacture of the solid-lighting devices. The phosphor can be effectively excited by the blue lights of 451nm and 465nm, and emit red strong red lights at 603nm and 614nm. The emission intensities of the phosphors InTaO4:xPr3+ increase with enhancing doping Pr3+ content and get a maximum value when x is 0.006, then decrease with the addition of Pr3+. The CIE chromaticity coordinates (0.65, 0.32) of the phosphor InTaO4:0.004Pr3+ are near to the ideal coordinates (0.67, 0.33). The phosphor InTaO4:0.004Pr3+ is probably considered to be a potential red-emitting conversion phosphor for white light emitting diodes (LEDs)..

Keywords

Pr3+-activated red-emitting phosphor, Photoluminescence properties, InTaO4; Solid-state reaction, White LEDs.

Submitted at: Jan. 15, 2023
Accepted at: Feb. 12, 2024

Citation

AN TANG, YONG TIAN, QILI FAN, XIDONG LIU, Luminescence investigation of Pr3+-activated InTaO4 red-emitting phosphor for white light emitting diodes, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 1-2, pp. 59-63 (2024)