Gallium-Nitride Substrates for Improved, Solid-State Lighting

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$100,000.00
Award Year:
2003
Program:
SBIR
Phase:
Phase I
Contract:
DE-FG02-03ER83693
Award Id:
61729
Agency Tracking Number:
73109S03-I
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
8829 Midway West Road, Raleigh, NC, 27617
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Mark Williams
(919) 789-8880
williams@kymatech.com
Business Contact:
Edward Pupa
(919) 789-8880
epupa@kymatech.com
Research Institution:
n/a
Abstract
73109S03-I Gallium-nitride-based LEDs have the potential to replace incandescent lighting in many applications, due to their high-efficiency operation. ¿ This high-payoff for gallium-nitride (GaN) LEDs centers around UV-stimulated phosphors for solid-state white lighting. However, due to the lack of materials and processing technology for GaN, this potential has not yet been realized. This project will develop a process for producing LED structures with low-defect densities on GaN substrates. The single-crystal GaN substrate will have structural and thermal properties that will allow the production of low-defect-density thin films, which will increase lifetime, brightness, and yields in optoelectronic devices. A nitride MOVPE growth process will be employed to grow GaN epitaxial layers on the substrate material. Phase I will optimize GaN epitaxial growth as well as fabricate quantum well LEDs on single crystal GaN substrates. Epitaxial layers and device characteristics will be correlated to GaN substrate quality. The initial focus will be to develop quantum well LED devices operating in a wavelength range less than 450 nm, the range of greatest interest for commercial applications. Commercial Applications and Other Benefits as described by awardee: The homoepitaxial growth of GaN on single crystal GaN substrates should result in increased lifetime and brightness in optoelectronics and increased power and frequency in microelectronic devices. Low-defect-density GaN films should lead to the commercialization of blue lasers in data storage and solid-state white LED lighting.

* information listed above is at the time of submission.

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