Optimization and temperature-dependent photoluminescence properties of yellow-orange emitting Sr1.99-x-yCaxMy(Si1-yZy)O4: 0.01Eu2+ (M = Y3+, K+, Z = Al3+, P5+) phosphors for white light-emitting diodes

被引：5

作者：

Ci, Zhipeng ^{[1
]}

Sun, Mengxing ^{[1
]}

Li, Yao ^{[1
]}

Que, Meidan ^{[1
]}

Wang, Qian ^{[1
]}

Zhu, Ge ^{[1
]}

Wang, Yuhua ^{[1
]}

机构：

[1] Lanzhou Univ, Sch Phys Sci & Technol, Dept Mat Sci, Lanzhou 730000, Peoples R China

来源：

OPTICAL MATERIALS | 2015年 / 39卷

关键词：

Silicate; Photoluminescence; LEDs; Thermal quenching; LUMINESCENCE CHARACTERISTICS; SR2SIO4-EU2+ PHOSPHORS; THERMAL-PROPERTIES; OPTICAL-PROPERTIES; CA PHOSPHORS; SR2SIO4EU2+; EMISSION; ENERGY; GREEN; EU2+;

D O I：

10.1016/j.optmat.2014.11.024

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

The yellow-orange phosphors Sr(1.99-x-y)Ca(x)M(y)Si(1-y)Z(y)O(4): 0.01Eu(2+) (M = Y3+, K+, Z = Al3+, P5+, 0 <= x <= 0.9, 0 <= y <= 0.01) were synthesized by the solid state reaction. X-ray diffraction and photoluminescence spectra were utilized to characterize the samples. The results indicate that the phosphors can be efficiently excited by the UV-blue light and show a broad band emission from about 425 to 700 nm. Ca2+ plays an important role in the red-shift of the emission band in Sr1.99-xCaxSiO4: 0.01Eu(2+). When the Ca2+ concentration x = 0.7, the emission peak under the excitation of 450 nm reaches a maximum at about 600 nm, which implies that the samples Sr1.99-xCaxSiO4: 0.01Eu(2+) could serve as a red phosphor for the blue LEDs. The trace doping of Al3+ and P5+ with Y3+ and K+ as charge compensation significantly enhances the emission intensities of Sr1.29Ca0.7SiO4: 0.01Eu(2+). In addition, thermal properties of typical samples are also carefully investigated. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：188 / 194

页数：7

共 41 条

[1]

BLASSE G, 1969, PHILIPS RES REP, V24, P131

[2]

THE BETA-REVERSIBLE-ALPHA' .2. X-RAY AND OPTICAL STUDY, AND FERROELASTICITY OF THE BETA-FORM [J].