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

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