Synthesis and Photoluminescence Characteristics of CaIn₂O₄:Dy³⁺ Phosphors Co-Doped with Gd³⁺, Zn²⁺ or Al³⁺ Ions

Abstract

Novel warm-white emitting phosphors CaIn2O4:Dy3+ co-doped with Gd3+, Zn2+, or Al3+ ions were prepared by solid state reaction. In this paper, a strategy of co-doping with different ions was used with the aim of affecting the luminescence properties of CaIn204:0.6%Dy3+ under NUV excitation. The luminescence intensities of CaIn2O4:0.6%Dy3+ were enhanced by 0.2% Gd3+ or 0.2% Zn2+ ions co-doping under 367 nm excitation, but lowered by co-doping with 0.2% Al3+ ions. Furthermore, the chromaticity coordinates of CaIn2O4:0.6%Dy3+ can be tuned from the cold-white region to warm-white region with Gd3+ or Zn2+ ions co-doping. These findings show that CaIn2O4:0.6%Dy3+,0.2% Gd3+, and CaIn2O4:0.6%Dy3+,0.2% Zn2+ have potential application value as new warm-white LED phosphors.

Influence Ca-doped SrIn2O4 powders on photoluminescence property prepared one step by ultrasonic spray pyrolysis

“…CaIn 2 O 4 is a semiconductor that presents an orthorhombic crystal structure also of the CaFe 2 O 4 type but with space group Pca21 or Pbcm. [21] Studies on the photoluminescent properties of CaIn 2 O 4 have been reported in the literature, such as obtaining orange-red [21] and white-hot [22] and effective upconversion [23][24][25].…”