Semi-Quantitative Estimation of Ce³⁺/Ce⁴⁺ Ratio in YAG:Ce³⁺ Phosphor under Different Sintering Atmosphere

Lianming Wang, Liqiang Zhuang, Hao Xin, Yuexia Huang, Deqiang Wang^*

Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China.

DOI: 10.4236/ojic.2015.51003                

Abstract

In order to confirm the relationship between the luminescence and the ratio of Ce³⁺/Ce⁴⁺ more clearly, a series of YAG:Ce³⁺ (Yttrium Aluminum Garnet, Y_2.94Al₅O₁₂:0.06Ce³⁺) phosphors were pre- pared under different sintering atmosphere. A semi-quantitative analysis based on X-ray photoe-lectron spectroscopy (XPS) was introduced to study the mole ratio of Ce³⁺/Ce⁴⁺ in the as-synthesized YAG:Ce³⁺ phosphors. The results indicated that the percentage of Ce³⁺/(Ce³⁺ + Ce⁴⁺) reached 88.46% under the reduction atmosphere. The emission intensity of YAG:Ce³⁺ phosphors was in-creased significantly with the increasing of Ce³⁺ concentration.

Keywords

YAG:Ce³⁺ Phosphor, Semi-Quantitative Estimation, Luminescence, Ratio of Ce³⁺/Ce⁴⁺, XPS, Reduction Atmosphere

Conflicts of Interest

The authors declare no conflicts of interest.

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