Room-Temperature solid state contact reaction synthesis of rare earth free RbVO3 phosphor and their photoluminescence properties

Ishigaki, Tadashi and Madhusudan, P. and Kamei, Shinnosuke and Uematsu, Kazuyoshi and Toda, Kenji and Sato, Mineo (2018) Room-Temperature solid state contact reaction synthesis of rare earth free RbVO3 phosphor and their photoluminescence properties. ECS Journal of Solid State Science and Technology, 7 (6). pp. 88-93. ISSN 2162-8777

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Official URL: https://doi.org/10.1149/2.0201806jss

Abstract

Rare earth free RbVO3 ceramic materials were prepared by facile solid-solid contact reaction between Rb2CO3 and V2O5 powders at room temperature within few minutes. Synchrotron X-ray power diffraction analysis and energy dispersive X-ray spectroscopy study showed that the resultant nanoparticles are crystalline with almost 100% purity. Further, the as-prepared sample showed emission spectrum intensity at 530 nm implying that RbVO3 ceramic materials can be used for white LED application. In addition, when 0.01 M aqueous NH4OH was added to the mixture of Rb2CO3 and V2O5, the emission intensity of the product was about twice higher than that of the product obtained from the reaction in moist air. The luminescence internal quantum efficiency (QE) of as-prepared RbVO3 phosphor is about 35% as estimated by a direct method. The present room-temperature fabrication method has great potential in large-scale fabrication of phosphor materials as well as other composite functional materials due to significantly reduced reaction time and energy.

Item Type: Article
Subjects: F Earth Science > Geology
Divisions: Department of > Earth Science
Depositing User: manjula User
Date Deposited: 23 Jul 2019 05:34
Last Modified: 23 Jul 2019 05:34
URI: http://eprints.uni-mysore.ac.in/id/eprint/5448

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