Sol–gel synthesis of red-phosphors [NaxGd1−x/3−zEuz]MoyW1−yO4 powers and luminescence properties
✍ Scribed by Fa-Bin Cao; Liao-Sha Li; Yan-Wen Tian; Zhi-Fang Gao; Yong-Jie Chen; Lin-Jiu Xiao; Xing-Rong Wu
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 372 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0925-3467
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✦ Synopsis
In this work, we report on the sol-gel synthesis of red-phosphors [Na x Gd 1Àx/3Àz Eu z ]Mo y W 1Ày O 4 powders doped with several dopants and its luminescence properties at room temperature. X-ray diffraction patters indicated that red-phosphors powders present tetragonal symmetry and cubic structure. The red-phosphors [Na x Gd 1Àx/3Àz Eu z ]Mo y W 1Ày O 4 powders doped exhibit characteristic of a ultraviolet visible-light emission diode. The SEM images for [Na 0:9 Gd 0:62 Eu 3þ 0:04 ]Mo 0.4 W 0.6 O 4 phosphor exhibits irregular morphology and cottonlike shape. The size of the particles is estimated to be about 1 lm.
Luminescence properties showed that the maximum emission in red region lies in the arrange of 613 nm and 617 nm.