Photoluminescence and cathode-luminescence of Eu3+-doped NaLnTiO4 (Ln = Gd and Y) phosphors

Niumiao Zhang, Chongfeng Guo*, Heng Jing

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

72 Citations (Scopus)

Abstract

Eu3+-activated layered perovskite ionic conductors NaYTiO 4 and NaGdTiO4 red-emitting phosphors were successfully synthesized by a modified sol-gel method for applications in field emission displays (FEDs) and ultraviolet-based light-emitting diodes (LEDs). The optimal compositions and parameters of synthesis were determined. The structure and luminescent properties were investigated by X-ray diffraction (XRD), photoluminescence excitation (PLE) and emission (PL) spectra. The cathode-luminescence (CL) spectra of phosphors as a function of accelerating voltage and filament current were also measured. The thermal stabilities and decay curves of phosphors were also investigated. The Eu3+-doped NaYTiO4 phosphor offers higher brightness and thermal stability than Eu3+-doped NaGdTiO4 in identical conditions. The former is the more suitable red-emitting phosphor candidate for LEDs and FEDs.

Original languageEnglish
Pages (from-to)7495-7502
Number of pages8
JournalRSC Advances
Volume3
Issue number20
DOIs
Publication statusPublished - 28 May 2013

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