Ultraviolet AlGaN-based Avalanche Photo Diode Grown over Single Crystal Bulk AlN Substrates

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$69,904.00
Award Year:
2004
Program:
SBIR
Phase:
Phase I
Contract:
NNL04AB35P
Award Id:
68908
Agency Tracking Number:
034100
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1195 Atlas Road, Columbia, SC, 29209
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
135907686
Principal Investigator:
Yuriy Bilenko
Principal Investigator
(803) 647-9757
bilenko@s-et.com
Business Contact:
Remis Gaska
President and CEO
(803) 647-9757
gaska@s-et.com
Research Institution:
n/a
Abstract
Premature breakdown is a key obstacle in developing AlGaN-based avalanche photo diodes (APD) for ultraviolet (UV) light detection. Novel materials growth techniques, such as Hydride Vapor Phase Epitaxy (HVPE) allows for reduction of dislocation density only to approximately 10^7 cm-2. In order to reduce the number of growth defects and dislocation density in AlGaN-based APDs we will use single crystal bulk AlN substrates. We recently demonstrated that the use of a bulk AlN substrate allows us to reduce the dislocation density in the epitaxial AlN layers by more than four orders of magnitude down to 10^4-10^5 cm-2. The reduction of dislocation density below 10^4 cm-2 would enable us to fabricate up to 100 ?m diameter devices in dislocation-free areas of the wafers. Hence, we expect that AlGaN-based APDs on bulk AlN substrates will exhibit major improvements in the breakdown voltages required for stable performance of the devices.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government