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Sol-gel Synthesis and Characterization of YAG:Ce3+ Phosphors by Various Pre-firing Temperatures

Published online by Cambridge University Press:  01 February 2011

Kyu-Seog Hwang ,
Seung Hwangbo ,
Ju-Hyun Jeong ,
Young-Hwan Lee  and
Jin-Tae Kim
Kyu-Seog Hwang
Affiliation:
[email protected], Department of Biomedical Engineering, Nambu University, Gwangju, Korea, Republic of
Seung Hwangbo
Affiliation:
[email protected], Honam University, Photonic Engineering, Gwangju, Korea, Republic of
Ju-Hyun Jeong
Affiliation:
[email protected], Konyang University, Phhthalmic optics, Deajeon, Korea, Republic of
Young-Hwan Lee
Affiliation:
[email protected], Chunnam Techno College, Department of Automobile, Jellanam-do, Korea, Republic of
Jin-Tae Kim
Affiliation:
[email protected], Chonsun University, Department of Photonic Engineering, Gwangju, Korea, Republic of
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Abstract

Ceria doped-yttrium aluminum garnet (Y3Al5O12:Ce3+, YAG:Ce), which is known as an efficient phosphor, have been widely used in optical display and lighting applications. Improved wet chemical method, sol-gel, has been studied, since conventional solid-state reaction requires a high-temperature and prolonged heating to obtain the pure phase. However, there has been little information, such as on pre-firing temperature, concerning high-quality powder formed by the wet chemical process. In this work, YAG:Ce was synthesized with a salted sol-gel process in which a water solution of inorganic salt with citric acid as additive. Transparent starting sol was pre-fired at 200 ˜ 300°C for 2 hrs in air and final annealing to obtain phase-pure YAG:Ce particles was performed at 1100°C for 2 hrs in argon. The effects of pre-firing temperatures on the crystal structure, morphology and luminescence were investigated. Effects of residual organics in the pre-fired gel on the properties of finally annealed phosphors will be fully discussed on the basis of the results of thermal analysis and chemical structure.

Keywords

sol-geloptical propertiespyrolysis
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1148: Symposium PP – Solid-State Chemistry of Inorganic Materials VII , 2008 , 1148-PP03-22
Copyright
Copyright © Materials Research Society 2009

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References

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