Synthesis And Luminescence Properties Of Y2.94Al5−MGaMO12:0.06Ce3+ (1≤M≤2.5) Green Phosphors For White Leds

Keywords

Luminescence; Phosphors; Thermal quenching; White LEDs; YAGG:Ce

Abstract

A series of Y2.94Al5−mGamO12:0.06Ce3+ (1≤m≤2.5) green phosphors were successfully synthesized by a solid-state reaction method. The microstructure, morphology, luminescence spectra and thermal stability of the phosphors were investigated. NaF flux can greatly promote the growth and crystallization of Y2.94Al5−mGamO12:0.06Ce3+ (1≤m≤2.5) phosphors. The luminescence properties of Y2.94Al5−mGamO12:0.06Ce3+ (1≤m≤2.5) green phosphors dramatically depend on the m value. When m≤1.5, the phosphor shows strong luminescence and excellent thermal stability. At 150 °C, the luminescence intensity of the m=1.0 and m=1.5 samples still maintains 90.3% and 88.8% of that measured at 25 °C, respectively. The experimental results demonstrate that Y2.94Al4GaO12:0.06Ce3+ and Y2.94Al3.5Ga1.5O12:0.06Ce3+ are promising green phosphors, which have great potential for use not only in high color rendering index white LEDs but also in high-power white LEDs.

Publication Date

1-1-2016

Publication Title

Ceramics International

Volume

42

Issue

1

Number of Pages

767-773

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.ceramint.2015.09.001

Socpus ID

84950150954 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84950150954

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