Synthesis of Nanosized Ce3+,Eu3+-Codoped YAG Phosphor in a Continuous Supercritical Water System

Luminescent yttrium aluminum garnet (Y3Al5O12) nanoparticles codoped with Ce3+ and Eu3+ (YAG:Ce3+,Eu3+) were continuously synthesized by directly feeding potassium hydroxide solution and a metal salt solution to supercritical water (SCW). The effects of the Ce3+-to-Eu3+ concentration ratio on the ph...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2008-08, Vol.47 (16), p.5994-6000
Main Authors: Lee, Jae-Wook, Lee, Jae-Hyuk, Woo, Eun-Ji, Ahn, Hyungwoong, Kim, Joon-Soo, Lee, Chang-Ha
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Exact sciences and technology
Materials and Interfaces
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Summary:Luminescent yttrium aluminum garnet (Y3Al5O12) nanoparticles codoped with Ce3+ and Eu3+ (YAG:Ce3+,Eu3+) were continuously synthesized by directly feeding potassium hydroxide solution and a metal salt solution to supercritical water (SCW). The effects of the Ce3+-to-Eu3+ concentration ratio on the photoluminescence of the synthesized nanoparticles were studied using a continuous SCW tubular reactor. At 20-s reaction time and a pH of 9.10 in the SCW reactor, the average size of the prepared phosphor nanoparticles was 60−150 nm and cubic or hexagonal particles coexisted with the spherical particles. The phosphor nanoparticles presented a broad emission band in the green-yellow spectral region due to Ce3+, as well as a sharp emission peak at around 610 nm in the red spectral region due to Eu3+. Without further thermal treatment, the YAG:Ce3+,Eu3+ phosphor synthesized in the continuous reactor under SCW conditions showed strong luminescence properties. Simultaneously, enhancement of the red spectral emission intensity in the YAG:Ce3+,Eu3+ phosphor could be controlled by increasing the Eu3+ concentration.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie800421w