Vertical Stand Transparent Light-Emitting Diode Architecture for High-Efficiency and High-Power Light-Emitting Diodes

Using a transparent ZnO vertical stand as a submount, a novel Light-emitting diode architecture, which is similar to conventional lighting bulbs, was proposed. The emission power of a blue LED based on $c$-plane (0001) bulk GaN was increased by 14.2 and 5.1% compared with those of conventional and s...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2010-08, Vol.49 (8), p.080210-080210-3
Main Authors: Pan, Chih-Chien, Koslow, Ingrid, Sonoda, Junichi, Ohta, Hiroaki, Ha, Jun-Seok, Nakamura, Shuji, DenBaars, Steven P
Format: Article
Language:English
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Summary:Using a transparent ZnO vertical stand as a submount, a novel Light-emitting diode architecture, which is similar to conventional lighting bulbs, was proposed. The emission power of a blue LED based on $c$-plane (0001) bulk GaN was increased by 14.2 and 5.1% compared with those of conventional and suspended die packages, respectively. The output power and external quantum efficiency of LEDs respectively reached 31.7 mW and 57.1% at a forward current of 20 mA under direct current conditions. The high thermal conductivity and refractive index of the transparent submount simultaneously resulted in high current operation and high external efficiency.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.49.080210