Large Area, Robust GaN-Based Photocathodes for High-Efficiency UV and Cherenkov Light Detection

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-06ER84506
Agency Tracking Number: 81197S06-I
Amount: $748,796.00
Phase: Phase II
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: 49
Solicitation Number: DE-FG01-05ER05-28
Small Business Information
7620 Executive Drive, Eden Prairie, MN, 55344
DUNS: 876868647
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 Andrew Wowchak
 Dr
 (952) 934-2100
 wowchak@svta.com
Business Contact
 Amir Dabiran
Title: Dr
Phone: (952) 934-2100
Email: dabiran@svta.com
Research Institution
N/A
Abstract
For most commercial applications ¿ such as flame and arc sensing, air and water purification, and combustion monitoring ¿ the requirements for ultraviolet (UV) light detection are adequately provided by commercially available GaN-based photodiodes. However, many UV photon-counting and imaging applications ¿ including Cherenkov light detection, space-borne astronomy, and UV spectroscopy ¿ demand much higher performance in detector sensitivity, speed, resolution, and noise level. This project will develop wide-bandgap GaN-based photocathodes for high-sensitivity visible-blind UV photodetectors and imagers. Phase I demonstrated the remarkable efficiency and stability of GaN-based photocathodes for UV detector and electron emitter applications. Device simulations were performed to determine potential new photocathode structures. Phase II will further improve reliability and reduce fabrication costs for the production of both high performance UV detectors and electron emitters, via the study of novel cesium-free GaN-based photocathode structures. Commercial Application and other Benefits as described by the awardee: High-performance UV photocathodes should provide a springboard to the commercialization of two products: an efficient electron emitter and a sensitive photodetector. These products should have commercialization potential for many applications, including UV imaging, spectroscopy, maskless electron lithography, and thin film metrology.

* Information listed above is at the time of submission. *

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