Spectral broadening of blue (Sr, Ba)5(PO4)3Cl:Eu2+ phosphors by changing Ba2+/Sr2+ composition ratio for high color rendering index

被引：21

作者：

Deressa, G. ^{[1
]}

Park, K. W. ^{[1
]}

Jeong, H. S. ^{[1
]}

Lim, S. G. ^{[1
]}

Kim, H. J. ^{[1
]}

Jeong, Y. S. ^{[1
]}

Kim, J. S. ^{[1
]}

机构：

[1] Pukyong Natl Univ, Dept Display Sci & Engn, Busan 608739, South Korea

来源：

JOURNAL OF LUMINESCENCE | 2015年 / 161卷

关键词：

White-light-emitting diode; Sr5-x-yBay(PO4)(3)Cl:xEu(2+); Color rendering index; Near-ultraviolet; OPTICAL-PROPERTIES; THERMAL-STABILITY; EU2+ LUMINESCENCE; PHOTOLUMINESCENCE; APATITES; BA;

D O I：

10.1016/j.jlumin.2015.01.032

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A single-phase Sr5-x-yBay(PO4)(3)Cl:xEu(2+) blue phosphors were synthesized through a solid-state reaction. By increasing Ba2+/Sr2+ ratio, their emission spectra are redshifted (449 nm -> 460 nm in main peak) and broadened (34 -> 90 nm in half width). Their excitation spectra are in the near ultraviolet region ascribed to be the allowed transition of Eu2+ from the 4f ground state to the 5d excited state. The phosphors show a similar thermal stability with Y3Al5O12:Ce3+ commercial phosphor. A white-light-emitting diode was fabricated using 400 nm chip with blue Sr2.45Ba2.45(PO4)(3)Cl:0.1Eu(2+) and orange Sr3SiO5:Eu2+ phosphors. The white-light-emitting diode shows the color coordinates (0.3118, 03039) at a white light (correlated color temperature=6810 K) and excellent color rendering index of 86. These results suggest that Sr2.45Ba2.45(PO4)(3)Cl:0.1Eu(2+) is a promising blue phosphor for high color-rendering ultraviolet-based white-light-emitting diode. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：347 / 351

页数：5

共 28 条

[1] Robust thermal performance of Sr2Si5N8:Eu2+: An efficient red emitting phosphor for light emitting diode based white lighting [J].