Synthesis, structure and optical properties of europium doped calcium barium phosphate - a novel phosphor for solid-state lighting

被引：54

作者：

Komuro, Naoyuki ^{[1
]}

Mikami, Masayoshi ^{[2
]}

Shimomura, Yasuo ^{[1
]}

Bithell, Erica G. ^{[3
]}

Cheetham, Anthony K. ^{[4
]}

机构：

[1] Mitsubishi Chem Corp, Odawara, Kanagawa 2500862, Japan

[2] Mitsubishi Chem Grp Sci & Technol Res Ctr Inc, Aoba Ku, Yokohama, Kanagawa 2278502, Japan

[3] Univ Cambridge, Inst Continuing Educ, Cambridge CB23 8AQ, England

[4] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB3 0FS, England

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2014年 / 2卷 / 30期

关键词：

CRYSTAL-STRUCTURE; YELLOW; LUMINESCENCE; CA;

D O I：

10.1039/c4tc00732h

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new phase, Ca6BaP4O17, was found in the CaO-BaO-P2O5 phase diagram and its Eu2+-doped derivative was evaluated as a possible phosphor for solid-state lighting. Ca6BaP4O17 was prepared by conventional solid-state synthesis and its structure was solved ab initio from high-resolution, synchrotron X-ray powder diffraction data. The bandgap of Ca6BaP4O17 was estimated to be 5.79 eV. Under excitation with UV to blue light, Ca6BaP4O17:Eu2+ shows strong yellow emission with the peak position at 553 nm. A white LED, which was fabricated with an InGaN blue chip and Ca6BaP4O17:Eu2+, achieved a luminous efficacy of 31 lm W-1 with a color-rendering index of 78 around the correlated color temperature of 6500 K.

引用

页码：6084 / 6089

页数：6

共 26 条

[11] LUMINESCENCE OF DIVALENT EUROPIUM IN BA-CA, BA-SR, AND CA-SR ORTHOPHOSPHATE AND PYROPHOSPHATE COMPOSITIONS [J].

LAGOS, CC .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1970, 117 (09) :1189-&

[12]

Larson A.C., 2004, General Structure Analysis System (GSAS)

[13] Yellow-Orange-Emitting CaAlSiN3:Ce3+ Phosphor: Structure, Photoluminescence, and Application in White LEDs [J].

Li, Y. Q. ;

Hirosaki, N. ;

Xie, R. J. ;

Takeda, T. ;

Mitomo, M. .

CHEMISTRY OF MATERIALS, 2008, 20 (21) :6704-6714

[14] LIBXC: A library of exchange and correlation functionals for density functional theory [J].

Marques, Miguel A. L. ;

Oliveira, Micael J. T. ;

Burnus, Tobias .

COMPUTER PHYSICS COMMUNICATIONS, 2012, 183 (10) :2272-2281

[15] 5d Levels of rare-earth ions in oxynitride/nitride phosphors: To what extent is the idea covalency reliable? [J].

Mikami, Masayoshi ;

Kijima, Naoto .

OPTICAL MATERIALS, 2010, 33 (02) :145-148

[16] Computational Chemistry Approach for White LED (Oxy)Nitride Phosphors [J].

Mikamiz, Masayoshi .

ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY, 2013, 2 (02) :R3048-R3058

[17] VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data [J].

Momma, Koichi ;

Izumi, Fujio .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2011, 44 :1272-1276

[18]

Morales A.E., 2007, Rev. Mex. Fis., V53, P18

[19]

Nakamura S., 2000, BLUE LASER DIODE COM, P230

[20] Red-shift of emission wavelength caused by reabsorption mechanism of europium activated Ca-α-SiAlON ceramic phosphors [J].

Sakuma, Ken ;

Hirosaki, Naoto ;

Xie, Rong-Jun .

JOURNAL OF LUMINESCENCE, 2007, 126 (02) :843-852

← 1 2 3 →