Research & Development

Study on synthesis and photoluminescence mechanism of CuAl2O4 and CuAl2O4:Cr phosphors

  • Liping BAN ,
  • Min MA
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  • 1. Yongcheng Vocational College,Yongcheng 476600,China
    2. Hunan University,College of chemical engineering

Received date: 2021-03-18

  Online published: 2022-03-14

Abstract

CuAl2O4 and CuAl2O4:Cr phosphors were prepared by a mild sol-gel method with tartaric acid as chelating agent.The X-ray powder diffraction results showed that the CuAl2O4 xerogel sintered at 800 ℃ exhibited a pure cubic CuAl2O4 phase with high crystallinity,CuAl2O4:Cr phosphor after sintering of xerogels was a mixed phase of CuAl2O4 and Cr2O3.The analysis of elemental composition and charge state showed that the CuAl2O4 and CuAl2O4:Cr phosphors did not contain other impurity elements,and there was a small amount of adsorbed oxygen in the two samples.Scanning electron microscope analysis showed that the particles of CuAl2O4 and CuAl2O4:Cr phosphors were approximately spherical,and each large particle was composed of many fine grains.The agglomeration phenomenon among CuAl2O4:Cr phosphor particles was obvious than that of CuAl2O4.The optical properties analysis found that the agglomeration of CuAl2O4:Cr phosphor particles resulted in a smaller optical band gap than that of CuAl2O4.CuAl2O4:Cr phosphor stimulated at 255 nm,and a strong fluorescence emission peak was obtained at 690 nm,which was mainly attributed to the transition between2Eg and4A2g in Cr3+.

Cite this article

Liping BAN , Min MA . Study on synthesis and photoluminescence mechanism of CuAl2O4 and CuAl2O4:Cr phosphors[J]. Inorganic Chemicals Industry, 2022 , 54(1) : 56 -61 . DOI: 10.19964/j.issn.1006-4990.2021-0162

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