Color tunability and stability of silicate phosphor for UV-pumped white LEDs

被引：36

作者：

Kim, JS ^{[1
]}

Jeon, PE ^{[1
]}

Park, YH ^{[1
]}

Choi, JC ^{[1
]}

Park, HL ^{[1
]}

机构：

[1] Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2005年 / 152卷 / 02期

关键词：

D O I：

10.1149/1.1850370

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

White-light-emitting diodes (LEDs) are fabricated by using 375 nm emissive GaN chip with Sr3MgSi2O8: Eu2+ (blue and yellow) or Sr3MgSi2O8: Eu2+, Mn2+ (blue, yellow, and red). The white lights from cold to warm color are actualized by controlling the mole fractions of Eu2+ and Mn2+ ions in Sr3MgSi2O8. Color tuning is based on the energy transfer from blue emission to yellow absorption, and from blue emission to red absorption due to spectral overlap between them. The energy transfers can be confirmed by faster decay time of the blue emission band. Our white LEDs show warm white light (3600 K), excellent color rendering index (95%), and higher color stability to variation of forward-bias voltage in comparison with a commercial white YAG : Ce3+-based diode. (C) 2005 The Electrochemical Society. All rights reserved.

引用

页码：H29 / H32

页数：4

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