Strongly Enhanced Phosphor Efficiency in GaInN White Light-Emitting Diodes Using Remote Phosphor Configuration and Diffuse Reflector Cup

Strongly Enhanced Phosphor Efficiency in GaInN White Light-Emitting Diodes Using Remote Phosphor Configuration and Diffuse Reflector Cup

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 li...

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Veröffentlicht in:Japanese Journal of Applied Physics 2005-01, Vol.44 (5L), p.L649
Hauptverfasser: Kim, Jong Kyu, Luo, Hong, Schubert, Eric Fred, Cho, Jaehee, Sone, Cheolsoo, Park, Yongjo
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container_issue 5L
container_start_page L649
container_title Japanese Journal of Applied Physics
container_volume 44
creator Kim, Jong Kyu
Luo, Hong
Schubert, Eric Fred
Cho, Jaehee
Sone, Cheolsoo
Park, Yongjo
description 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.
doi_str_mv 10.1143/JJAP.44.L649
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title Strongly Enhanced Phosphor Efficiency in GaInN White Light-Emitting Diodes Using Remote Phosphor Configuration and Diffuse Reflector Cup
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