Ion Exchange Synthesis and Luminescence Properties of Rodlike Phosphors ZnMoO₄:Eu³⁺ for White LEDs

Abstract:

ZnMoO₄:Eu³⁺ red phosphors were prepared by ion exchange method in strong acid media. The structure and morphology of products were characterized through XRD, TG-DTA, TEM, HRTEM and UV-vis after preparation. The luminescence properties of them were investigated with emission and excitation spectra.The results indicate that the ZnMoO₄:Eu³⁺ red phosphors were in rodelike structure and the diameter is about 2μm,the length is about 30μm after the precursor annealed at 800°C for 2 h. The excitation spectra showed effective excitation wavelengths at UV (395 nm) and blue (465 nm) corresponding to the f-f transition of Eu³⁺. These wavelengths coincided with the wavelengths of commercial GaN based LED, so that the phosphor might be a better candidate for red component for white LEDs.

• Periodical: Applied Mechanics and Materials (Volume 343)
• Pages: 97-100
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.343.97
• Online since: July 2013
• Authors: Qian Nan Jia, Sha Ren, Guang Wei Yuan, Li Wang
• Keywords: Ion Exchanged Method, Luminescence Property, ZnMoO₄:Eu³⁺

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