Effect of NH4Cl Flux on Structural and Luminescent Properties of CaS: Eu²⁺ Phosphors

Abstract:

CaS:Eu²⁺ phosphors were prepared by two steps method at a relatively low temperature (1050°C) using NH₄Cl as a flux. The influences of NH₄Cl flux concentrations on the crystal structure, morphology and photoluminescent properties of CaS:Eu²⁺ phosphors were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence (PL), respectively. XRD analysis shows that when the raw materials added with the NH₄Cl flux, the crystal structure was not changed .The SEM images indicate that increase of the NH₄Cl flux enlarged the grain size of the phosphor particles. The luminescence intensity of CaS:Eu²⁺ was enhanced with adding NH₄Cl flux and up to the maximum emission intensity when the addition of NH₄Cl flux is 1wt%.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 755-758
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.755
• Online since: July 2014
• Authors: Yun Jie Zhang, Jie Zhao*, Da Jian Wang, Jian Ma
• Keywords: Diffusion, Microstructure, Phosphor, Photoluminescence (PL), Two Steps

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