Single-phased white-light emitting CaAl₂Si₂O₈: Eu²⁺, Mn²⁺ phosphors prepared by a sol¨Cgel method

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• 作者：Baoling Wang ; Liuzheng Sun ; Haidong Ju ; Shilong Zhao ; Degang Deng ; Huanping Wang and Shiqing Xu
• 关键词：Sol– ; gel ; Phosphor ; White LED
• 刊名：Journal of Sol-Gel Science and Technology
• 出版年：2009
• 出版时间：June, 2009
• 年：2009
• 卷：50
• 期：3
• 页码：368-371
• 全文大小：676.3 KB

文摘

CaAl₂Si₂O₈: Eu2+, Mn2+ phosphors have been prepared by a sol–gel method. X-ray diffractometer, spectrofluorometer and UV–Vis spectrometer were used to characterize structural and optical properties of the samples. The results indicate that anorthite (CaAl₂Si₂O₈) directly crystallizes at 1000 ¡ãC in the sol–gel process. CaAl₂Si₂O₈: Eu2+, Mn2+ phosphors show two emission bands excited by ultraviolet light. Blue (around 415 nm) and yellow (around 575 nm) emissions originate from Eu2+ and Mn2+, respectively. With appropriate tuning of Mn2+ content, CaAl₂Si₂O₈: Eu2+, Mn2+ phosphors exhibit different hues and relative color temperatures.