Cathodoluminescent characteristics of green-emitting ZnAl2O 4:Mn thin-film phosphors

Z. Lou, Jianhua Hao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

41 Citations (Scopus)

Abstract

Thin films of ZnAl2O4:Mn were grown on aluminosilicate ceramic plates using spray pyrolysis of aqueous solutions. The cathodoluminescence (CL) properties of the films under low to medium excitation voltage (< 5 kV) were investigated. The films exhibited green CL after being annealed at temperatures above 550°C, which corresponds to the transition between 4T1 and 6A1 of Mn 2+ ions located in the tetra coordination of the Zn2+ site in the spinel structure. The chromaticity coordinates were x = 0.150 and y = 0.734 with a dominant wavelength of 525 nm and an 82% color purity. The CL luminance and efficiency depended on the excitation voltage and current density. Saturation effects were observed as the current density increased. A luminance of 540 cd/m2 and an efficiency of 4.5 lm/W were obtained at an excitation voltage of 4 kV with a current density of 38 μ A/cm2.
Original languageEnglish
Pages (from-to)151-154
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume80
Issue number1
DOIs
Publication statusPublished - 1 Jan 2005
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

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