Preparation and Photoluminescent Properties ofCa₂PO₄Cl Activated by Divalent Europium

• 발행기관: 한국마이크로전자및패키징학회
• 간행물 정보: 『마이크로전자 및 패키징학회지』제23권 제4호, 63~67쪽, 전체 5쪽
• 주제분류: 공학 > 산업공학
• 파일형태: PDF
• 발행일자: 2016.12.31

영문 초록

Divalent europium-activated Ca₂PO₄Cl phosphor powders were prepared by a chemical synthetic method followed by heat treatment in reduced atmosphere, and the crystal structures, morphologies and photoluminescence properties of the powders were investigated by x-ray powder diffraction, scanning electron microscope and spectrometer. The effect of Ca/P mole ratio at the starting materials on the final products was evaluated. The optimized synthesis condition obtained in this study was Ca/P mole ratio of 2.0. The present phosphor materials had higher photoluminescence intensity and better color purity than the commercial blue phosphor powders, (Ca,Ba,Sr)₁₀(PO₄)₆Cl₂:Eu²⁺. The result of excitation spectrum measurement indicated that the excitation efficiency of the synthesized powders was higher for the long-wavelength UV region than that of the commercial phosphor. It was thus concluded that the samples prepared in this study can be successfully applied for the light-emitting devices such as LED excited with long-wavelength UV light sources.

목차

1. Introduction

2. Experimental Procedure

3. Results and Discussion

4. Conclusions

References

키워드

Ca₂PO₄Cl:Eu²⁺ phosphor photoluminescence apatite excitation