Luminescence study of samarium-doped Ca₂KZn₂(VO₄)₃ phosphor as a potential candidate for lighting and display device applications

Abstract

Ca₂KZn₂(VO₄)₃:Sm³⁺ phosphors have been prepared via the conventional solid state reaction method. Under 331 nm excitation, undoped Ca₂KZn₂(VO₄)₃ phosphor exhibits broad emission in the range of 400 nm to 600 nm, centered at the 515 nm emission wavelength. Whereas, Sm³⁺ doped Ca₂KZn₂(VO₄)₃ phosphor exhibited three intense emission bands around 567, 601 and 648 nm due to ⁴G_5/2^{− 6}H_5/2, ⁴G_5/2^{− 6}H_7/2 and ⁴G_5/2^{− 6}H_9/2 transition of Sm³⁺ ions, respectively. These results indicates that the synthesized Ca₂KZn₂(VO₄)₃:Sm³⁺ phosphors can be used as potential candidate for white light emitting diodes (WLEDs) and display devices.

Keywords:

• Ca₂KZn₂(VO₄)₃
• Solid-state reaction method
• white light emitting diodes (w-LEDs)
• display devices

Acknowledgments

We thank the Department of Chemistry Sophisticated Instrumentation Center, Dr. H. S. Gour University, Sagar, for laboratory and instrumental facilities. This work was financially supported by UGC-Govt. of India.