White light emission from blue and near ultraviolet light-emitting diodes precoated with a Sr3SiO5:Ce3+, Li+ phosphor

被引：67

作者：

Jang, Ho Seong ^{[1
]}

Jeon, Duk Young ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea

来源：

OPTICS LETTERS | 2007年 / 32卷 / 23期

关键词：

D O I：

10.1364/OL.32.003444

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

White-light-emitting diodes (WLEDs) were fabricated by combining a yellow Sr3SiO5:Ce3+, Li+ phosphor with a blue light-emitting diode (LED) (460 nm chip) or a near ultraviolet (n-UV) LED (405 nm chip), respectively. Color temperature (T-c) of Sr3SiO5:Ce3+, Li+-based WLEDs could be tuned from 6500 to 100,000 K (blue LED pumping) and from 4900 to 50,000 K (n-UV LED pumping) without mixing with other phosphors. The blue LED-pumped WLED showed excellent white light (luminous efficiency=31.7 lm/W, T-c = 6857 K) at 20 mA. This WLED showed a stable color coordinates property against an increase of the forward current. An n-UV LED-pumped WLED also showed bright white light (25.0 lm/W, 5784 K) at 20 mA. (C) 2007 Optical Society of America.

引用

页码：3444 / 3446

页数：3

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