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

Jong Kyu Kim; Hong Luo; Eric Fred Schubert; Jaehee Cho; Cheolsoo Sone; Yongjo Park

doi:10.1143/JJAP.44.L649

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

Jong Kyu Kim^*
, Hong Luo
, Eric Fred Schubert
, Jaehee Cho
, Cheolsoo Sone
, Yongjo Park

^*Corresponding author for this work

Department of Semiconductor Science and Technology

Rensselaer Polytechnic Institute
Samsung

Research output: Contribution to journal › Journal article › peer-review

252 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	L649-L651
Journal	Japanese Journal of Applied Physics
Volume	44
Issue number	20-23
DOIs	https://doi.org/10.1143/JJAP.44.L649
State	Published - 2005

Keywords

Diffuse reflector
Encapsulant
GaN
Light-emitting diodes
Phosphor

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10.1143/JJAP.44.L649

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@article{546350796c57495582fb30e3c12153e0,

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

abstract = "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.",

keywords = "Diffuse reflector, Encapsulant, GaN, Light-emitting diodes, Phosphor",

author = "Kim, \{Jong Kyu\} and Hong Luo and Schubert, \{Eric Fred\} and Jaehee Cho and Cheolsoo Sone and Yongjo Park",

year = "2005",

doi = "10.1143/JJAP.44.L649",

language = "English",

volume = "44",

pages = "L649--L651",

journal = "Japanese Journal of Applied Physics",

issn = "0021-4922",

number = "20-23",

}

TY - JOUR

T1 - Strongly enhanced phosphor efficiency in GaInN white light-emitting diodes using remote phosphor configuration and diffuse reflector cup

AU - Kim, Jong Kyu

AU - Luo, Hong

AU - Schubert, Eric Fred

AU - Cho, Jaehee

AU - Sone, Cheolsoo

AU - Park, Yongjo

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

KW - Diffuse reflector

KW - Encapsulant

KW - GaN

KW - Light-emitting diodes

KW - Phosphor

UR - https://www.scopus.com/pages/publications/21344473633

U2 - 10.1143/JJAP.44.L649

DO - 10.1143/JJAP.44.L649

M3 - Journal article

AN - SCOPUS:21344473633

SN - 0021-4922

VL - 44

SP - L649-L651

JO - Japanese Journal of Applied Physics

JF - Japanese Journal of Applied Physics

IS - 20-23

ER -

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

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Keywords

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