Luminescence properties of red-emitting Ca₉Y(PO₄)₇: Eu³⁺ phosphor for NUV white-LEDs

详细信息    查看全文

• 作者：Baoling Wang ; Yiting Lin ; Haidong Ju
• 关键词：Luminescence ; Red phosphor ; LED
• 刊名：Journal of Alloys and Compounds
• 出版年：25 January, 2014
• 年：2014
• 卷：584
• 期：Complete
• 页码：167-170
• 全文大小：614 K

文摘

Ca₉Y(PO₄)₇:Eu³⁺ phosphors have been prepared by solid state reaction. X-ray diffractometer, spectrofluorometer and UV-Vis spectrometer were used to characterize structural and optical properties of the samples. The results indicate that single-phase trigonal Ca₉Y(PO₄)₇:Eu³⁺ can be obtained when the calcination temperature is higher than 1100 掳C. The optimum concentration of Eu³⁺-doped in the Ca₉Y(PO₄)₇ is 13 mol%. The CIE chromaticity coordinate of Ca₉Y(PO₄)₇:0.13Eu³⁺ phosphor (0.650, 0.349) is close to National Television Standard Committee (NTSC) standard value for red phosphor (0.670, 0.330).