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Effect of Si4+ substitution on structure and luminescence of doped Na2CaMg(PO4)2 phosphors

YONGYAN XU1,2,* , KAI ZHANG3,* , YING CHANG1, CHUN CHANG2

Affiliation

  1. College of Chemistry and Chemical Engineering, Zhoukou Normal University, Zhoukou 466001, China
  2. College of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China
  3. College of Physics, Zhoukou Normal University, Zhoukou 466001, China

Abstract

The Eu2+-doped Na2CaMg(P1-xSixO4)2 phosphors were prepared by high-temperature solid-state reaction. The structural and optical effects of Si4+ substitution were investigated with the use of X-ray diffraction, Fourier transform infrared spectra, Raman spectra, luminescence spectra and fluorescence decay curves, etc. The spectral parameters, Stokes shift and Eu2+ substitution sites in Na2CaMg(PO4)2 were discussed by using empirical equations. The results show that Si4+ substitution increases the emission intensity of Eu2+ by ca. 50% at the optimal concentration of x = 0.05. This study can provide a guidance for the development of Eu2+-activated phosphate phosphors for WLEDs.

Keywords

Si4+ substitution, Luminescence, Eu2+-doped Na2CaMg(PO4)2, WLEDs.

Citation

YONGYAN XU, KAI ZHANG, YING CHANG, CHUN CHANG, Effect of Si4+ substitution on structure and luminescence of doped Na2CaMg(PO4)2 phosphors, Optoelectronics and Advanced Materials - Rapid Communications, 14, 11-12, November-December 2020, pp.515-520 (2020).

Submitted at: March 7, 2020

Accepted at: Nov. 25, 2020