Strongly enhanced phosphor efficiency in GaInN white light-emitting diodes using remote phosphor configuration and diffuse reflector cup

被引：201

作者：

Kim, JK

Luo, H

Schubert, EF ^{[1
]}

Cho, JH

Sone, CS

Park, YJ

机构：

[1] Rensselaer Polytech Inst, Dept Elect Comp & Syst Engn, Troy, NY 12180 USA

[2] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA

[3] Samsung Adv Inst Technol, Photon Program Team, Suwon 440600, South Korea

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2005年 / 44卷 / 20-23期

关键词：

light-emitting diodes; GaN; diffuse reflector; encapsulant; phosphor;

D O I：

10.1143/JJAP.44.L649

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Enhancement of phosphor efficiency is reported for GaInN-based white light-emitting diodes (LEDs) employing a large separation between the primary LED emitter and the wavelength converter, and a diffuse reflector cup. Ray-tracing simulations show that extraction efficiency of wavelength-converted light is enhanced by 75%. The experimental improvement in phosphor efficiency of blue-pumped yellow phosphor is 15.4% compared with conventional phosphor-based white LEDs. The improvement is attributed to reduced re-absorption of wavelength-converted light by the LED chip.

引用

页码：L649 / L651

页数：3

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