2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors

被引：571
作者：
Xie, Rong-Jun
Hirosaki, Naoto
Kimura, Naoki
Sakuma, Ken
Mitomo, Mamoru
机构：
[1] Natl Inst Mat Sci, Nano Ceram Ctr, Tsukuba, Ibaraki 3050044, Japan
[2] Fujikura Ltd, Sakura, Chiba 2858550, Japan
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 19期
关键词：
D O I：
10.1063/1.2737375
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Green alpha-sialon:Yb2+ and red Sr2Si5N8:Eu2+ oxynitride/nitride phosphors have been demonstrated as potential downconversion luminescent materials for white light-emitting diodes (LEDs). In this letter, the authors attempt to fabricate white LEDs by combining alpha-sialon:Yb2+ and Sr2Si5N8:Eu2+ with a blue LED die and report their optical properties. These two phosphors lend themselves for use in 2-phosphor-converted white LEDs with promising properties: a wide range of tunable correlated color temperature (2700-6700 K), acceptable color rendering index (82-83), and luminous efficacy (17-23 lm/W). These LEDs are acceptable for general lighting.
引用
收藏
页数：3
相关论文
共 20 条
[1]   TEMPERATURE-DEPENDENT STUDIES OF CATHODOLUMINESCENCE OF GREEN BAND OF ZNO CRYSTALS [J].
BHUSHAN, S ;
CHUKICHEV, MV .
JOURNAL OF MATERIALS SCIENCE LETTERS, 1988, 7 (04) :319-321
[2]   Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes -: art. no. 211905 [J].
Hirosaki, N ;
Xie, RJ ;
Kimoto, K ;
Sekiguchi, T ;
Yamamoto, Y ;
Suehiro, T ;
Mitomo, M .
APPLIED PHYSICS LETTERS, 2005, 86 (21) :1-3
[3]   Temperature-dependent emission spectra of M2SiO4:Eu2+ (M = Ca, Sr, Ba) phosphors for green and greenish white LEDs [J].
Kim, JS ;
Park, YH ;
Kim, SM ;
Choi, JC ;
Park, HL .
SOLID STATE COMMUNICATIONS, 2005, 133 (07) :445-448
[4]   Extrahigh color rendering white light-emitting diode lamps using oxynitride and nitride phosphors excited by blue light-emitting diode [J].
Kimura, Naoki ;
Sakuma, Ken ;
Hirafune, Syunichiro ;
Asano, Kenichiro ;
Hirosaki, Naoto ;
Xie, Rong-Jun .
APPLIED PHYSICS LETTERS, 2007, 90 (05)
[5]   Luminescence properties of Ce3+-activated alkaline earth silicon nitride M2Si5N8 (M = Ca, Sr, Ba) materials [J].
Li, YQ ;
de With, G ;
Hintzen, HT .
JOURNAL OF LUMINESCENCE, 2006, 116 (1-2) :107-116
[6]   Luminescence properties of Eu2+-activated alkaline-earth silicon-oxynitride MSi2O2-δN2+2/3δ (M = Ca, Sr, Ba):: A promising class of novel LED conversion phosphors [J].
Li, YQ ;
Delsing, ACA ;
de With, G ;
Hintzen, HT .
CHEMISTRY OF MATERIALS, 2005, 17 (12) :3242-3248
[7]   Highly efficient all-nitride phosphor-converted white light emitting diode [J].
Mueller-Mach, R ;
Mueller, G ;
Krames, MR ;
Höppe, HA ;
Stadler, F ;
Schnick, W ;
Juestel, T ;
Schmidt, P .
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2005, 202 (09) :1727-1732
[8]  
Narukawa Y., 2005, Oyo Buturi, V74, P1423
[9]  
Sakuma K, 2005, IEICE T ELECTRON, VE88C, P2057, DOI 10.1093/iete1e/e88-c.11.2057
[10]   Warm-white light-emitting diode with yellowish orange SiAlON ceramic phosphor [J].
Sakuma, K ;
Omichi, K ;
Kimura, N ;
Ohashi, M ;
Tanaka, D ;
Hirosaki, N ;
Yamamoto, Y ;
Xie, RJ ;
Suehiro, T .
OPTICS LETTERS, 2004, 29 (17) :2001-2003
12