Ce-doped Al2O3-YAG eutectic and its application for white LEDs

被引：44

作者：

Sai, Qinglin ^{[1
,2
]}

Zhao, Zhiwei ^{[1
]}

Xia, Changtai ^{[1
]}

Xu, Xiaodong ^{[3
]}

Wu, Feng ^{[3
]}

Di, Juqing ^{[1
,2
]}

Wang, Lulu ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Key Lab Mat High Power Laser, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Transparent & Optofunct Inorgan Mat, Shanghai 201800, Peoples R China

来源：

OPTICAL MATERIALS | 2013年 / 35卷 / 12期

关键词：

Al2O3-YAG eutectic; Ce-doped; Photoluminescence; White LED; LIGHT-EMITTING-DIODES; SINGLE-CRYSTAL; PHOSPHOR; GROWTH;

D O I：

10.1016/j.optmat.2013.05.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ce-doped Al2O3-YAG (Y3Al5O12, yttrium aluminum garnet) eutectic, a resin-free phosphor for white light emitting diodes (WLEDs), was successfully grown by the Czochralski method. X-ray diffraction and scanning electron microscopy show that this material has a typical eutectic structure of interpenetrating sapphire and garnet phases, as well as lamellar spacing in the order of tens of microns. The eutectic has a higher Ce3+ segregation coefficient than YAG single crystal. The photoluminescence properties of this eutectic were also investigated. Results show that it is characterized by a wide excitation band, and that the luminous efficiency of a eutectic-packaged LED is higher than that of a phosphor powder-packaged LED. The findings indicate that the Al2O3-YAG eutectic is a promising phosphor for WLED applications. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：2155 / 2159

页数：5

共 21 条

[1] QUANTITATIVE INTERPRETATION OF X-RAY-DIFFRACTION PATTERNS OF MIXTURES .1. MATRIX-FLUSHING METHOD FOR QUANTITATIVE MULTICOMPONENT ANALYSIS [J].

CHUNG, FH .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1974, 7 (DEC1) :519-525

[2] Crystallographic texture and orientation variants in Al2O3-Y3Al5O12 directionally solidified eutectic crystals [J].

Frazer, CS ;

Dickey, EC ;

Sayir, A .

JOURNAL OF CRYSTAL GROWTH, 2001, 233 (1-2) :187-195

[3] Luminescence Characteristics of YAG Glass-Ceramic Phosphor for White LED [J].

Fujita, Shunsuke ;

Sakamoto, Akihiko ;

Tanabe, Setsuhisa .

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 2008, 14 (05) :1387-1391

[4]

He Haiping, 2010, Electronic Components & Materials, V29, P60, DOI 10.3969/j.issn.1001-2028.2010.05.019

[5]

Li BC, 2010, CHIN OPT LETT, V8, P221, DOI 10.3788/COL20100802.0221

[6] Coupled growth of unidirectionally solidified Al2O3-YAG eutectic ceramics [J].

Mizutani, Y ;

Yasuda, H ;

Ohnaka, I ;

Maeda, N ;

Waku, Y .

JOURNAL OF CRYSTAL GROWTH, 2002, 244 (3-4) :384-392

[7] CANDELA-CLASS HIGH-BRIGHTNESS INGAN/ALGAN DOUBLE-HETEROSTRUCTURE BLUE-LIGHT-EMITTING DIODES [J].

NAKAMURA, S ;

MUKAI, T ;

SENOH, M .

APPLIED PHYSICS LETTERS, 1994, 64 (13) :1687-1689

[8] SUPERBRIGHT GREEN INGAN SINGLE-QUANTUM-WELL-STRUCTURE LIGHT-EMITTING-DIODES [J].

NAKAMURA, S ;

SENOH, M ;

IWASA, N ;

NAGAHAMA, S ;

YAMADA, T ;

MUKAI, T .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1995, 34 (10B) :L1332-L1335

[9]

Nakamura S., 1996, The blue laser diode: GaN based light emitters and lasers, VFirst, DOI [10.1007/978-3-662-03462-0, DOI 10.1007/978-3-662-03462-0]

[10] Properties of transparent Ce:YAG ceramic phosphors for white LED [J].

Nishiura, S. ;

Tanabe, S. ;

Fujioka, K. ;

Fujimoto, Y. .

OPTICAL MATERIALS, 2011, 33 (05) :688-691

← 1 2 3 →