Sharp Bandpass AlGaN p-i-n Photodiode Detectors for Ultraviolet B Irradiance Measurements

Award Information
Agency: Department of Energy
Branch: N/A
Contract: N/A
Agency Tracking Number: 41757
Amount: $74,895.00
Phase: Phase I
Program: SBIR
Awards Year: 1998
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
7620 Executive Drive, Eden Prair, MN, 55344
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr. Jody J. Klaassen
 Senior Research Scientist
 (612) 934-2100
Business Contact
 Dr. Peter P. Chow
Title: Pres.
Phone: (612) 934-2100
Research Institution
50521-98-I Sharp Bandpass AlGaN p-i-n Photodiode Detectors for Ultraviolet B Irradiance Measurements--SVT Associates, Inc., 7620 Executive Drive, , Eden Prairie, MN 55344-3677; (612) 934-2100 Dr. Jody J. Klaassen, Principal Investigator Dr. Peter P. Chow, Business Official DOE Grant No. DE-FG02-98ER82683 Amount: $74,895 Solar radiation in the ultraviolet B (280-320 nm) band is attenuated by ozone absorption in the upper atmosphere, and monitoring this band is important to understanding the dynamics of the earth¿s atmosphere and warning of potential health risks arising from high exposure to short wavelength solar radiation. A low cost, robust, highly accurate photodiode bandpass detector is needed for irradiance measurements in this part of the solar spectrum. This project will use p-i-n photodiodes fabricated from the wide band-gap semiconductor aluminum gallium nitride, AlxGa(1-x)N, as the ultraviolet sensitive detector for these measurements. A short wavelength absorbing, but electrically non-active, overlayer will be incorporated directly into the photodiode structure to create a narrow bandpass spectral response in the ultraviolet B region. Such a device will have high quantum efficiency response within the bandpass and ~105 rejection of radiation outside the bandpass. The objective of the Phase I effort is to fabricate a nitride-based photodiode detector which is sensitive to the ultraviolet B band and has high rejection of response to all other wavelengths. Commercial Applications and Other Benefits as described by the awardee: The technology should also be applicable in chemical analysis, combustion diagnostics, water quality assurance, medical diagnostics, and in the semiconductor industry. Military applications, (e.g., missile detection and artillery fire detection) are also possible._

* 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
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government