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Proceedings Paper

Polychromatic white LED using GaN nano pyramid structure
Author(s): Taek Kim; Jusung Kim; Moonseung Yang; Yongsoo Park; U-In Chung; Yongho Ko; Yonghoon Cho
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Paper Abstract

We have developed monolithic white light emitting diodes (LEDs) with a hybrid structure of planar c-planes and nano size hexagonal pyramids. The white spectrum is composed of blue and yellow emissions from the InGaN multi quantum wells (MQWs) on the planar c-planes and on the nano pyramids, respectively. The yellow emission is originated from quantum wells, wires, and dots that are formed at the sides, edges, and tops of the nano-pyramids, respectively. As a result, the emission peaks are different and the entire yellow spectrum is broad enough to make a white in combination with a blue emission. The longer wavelength from the InGaN on nano-pyramids than the wavelength from the InGaN on c-planes is explained by excess In supply from the dielectric selective growth mask. The color temperature is tuned from 3600K to 6400K by controlling the relative area ratio of c-plane and nano-pyramids.

Paper Details

Date Published: 4 March 2013
PDF: 6 pages
Proc. SPIE 8641, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII, 86410E (4 March 2013); doi: 10.1117/12.2006561
Show Author Affiliations
Taek Kim, Samsung Advanced Institute of Technology (Korea, Republic of)
Jusung Kim, Samsung Advanced Institute of Technology (Korea, Republic of)
Moonseung Yang, Samsung Advanced Institute of Technology (Korea, Republic of)
Yongsoo Park, Samsung Advanced Institute of Technology (Korea, Republic of)
U-In Chung, Samsung Advanced Institute of Technology (Korea, Republic of)
Yongho Ko, Korea Advanced Institute of Science and Technology (Korea, Republic of)
Yonghoon Cho, Korea Advanced Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 8641:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Martin Strassburg, Editor(s)

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