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Silicon Carbide Avalanche Photodiode for Photomultiplier Tube Replacement in Airborne Biological Contaminant Identification Sensors

Primary Partner: Widetronix Semiconductors, Inc.
Project Type: TAD 2007
Web Address: http://syracusecoe.org/documents/2008/6/TAD_II_2007_Summary_Sheets.pdf

Description:
This material is based upon work supported by the United States Environmental Protection Agency under Award Number EPA 05 X-83232501-0.

Widetronix proposes to develop a prototype avalanche photodiode sensor for identification of biological contaminants in the built environment. A miniature sensor will incorporate a commercially available ultraviolet light emitting diode (UV-LED) with a silicon carbide (SiC) photodiode. This device will have size, cost, and energy efficiency advantages over legacy sensors. It will also incorporate Widetronix's proprietary materials technology, which minimizes the crystal defects in SiC wafers, resulting in greater device performance and reliability.

Objective:
The main objective of this proposed project is to demonstrate a commercial prototype for the proposed sensor. Secondarily we will demonstrate the commercial viability of Widetronix's proprietary SiC wafers as a low-defect, high quality alternative for sensor applications. The company, in conjunction with researchers at Cornell, will fabricate the photodiode, integrate it into a working prototype using a UV-LED, and test it with known biological contaminants. Device design and fabrication will use standard nanofabrication techniques. Testing procedures will utilize USEPA, OSHA, and ASHRAE standards for measuring indoor air contaminants.

Accomplishments:

Researcher Information:

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http://www.widetronix.com/people.php

http://green.venturebeat.com/2009/11/17/widetronix-goes-nuclear-to-build-a-25-year-battery/;  http://findarticles.com/p/articles/mi_qa3718/is_20090508/ai_n31963767/; http://www.ecnmag.com/News/Feeds/2010/05/blogs-the-cutting-edge-widetronix-corp-receives-federal-funding/




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