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5 Watt per Kilogram Tritium Betavoltaic

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: 80NSSC19C0178
Agency Tracking Number: 186263
Amount: $750,000.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: S3
Solicitation Number: SBIR_18_P2
Timeline
Solicitation Year: 2018
Award Year: 2019
Award Start Date (Proposal Award Date): 2019-08-07
Award End Date (Contract End Date): 2021-08-06
Small Business Information
12491 SW 134 Court, Suite #23
Miami, FL 33186-0000
United States
DUNS: 364558903
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Peter Cabauy
 (305) 909-7593
 peter.cabauy@citylabs.net
Business Contact
 Peter Cabauy
Phone: (305) 909-7593
Email: peter.cabauy@citylabs.net
Research Institution
N/A
Abstract

The central goal of this Phase II effort is to create the worldrsquo;s first milliwatt scale betavoltaic. This project will utilize an ultra-thin, light weight, betavoltaic p/n junction, developed in Phase I, that increases the efficiency of betavoltaic devices from 8% to greater than 10% based on the incident tritium beta flux.nbsp; Betavoltaic power sources offer advantages under conditions that render battery replacement difficult, impossible, or life-threatening, and in applications where long-lasting (20+ years), continuous, low-power sources are crucial to device operation. These applications include defense electronics, homeland security, intelligence sensors, aerospace, structural-health monitoring sensors, sub-sea sensors, satellites / deep space probes, and medical devices / implants.nbsp; City Labs is the only licensed manufacturer of betavoltaic power sources which carries a General License allowing distribution to anyone in the United States without requiring the recipient to possess a radiation license.nbsp; The specific power of tritium is 340 W/kg with a half-life of 12.3 years and is readily available for commercial applications such as luminous watch dials, exit signs, medical tracers, and betavoltaic batteries. Traditionally, tritium metal hydride films have had a power density of approximately 38 W/kg (e.g. titanium tritide) but City Labsrsquo; new metal tritide film has a power density approaching 70 W/Kg and can be expanded to 100 W/kg. The milliwatt scale betavoltaic will consist of a wide bandgap III-V p/n junction, developed in Phase I, and a high beta-flux metal tritide, stacked into layers of ultra-thin junctions. City Labs will perform this work in partnership with Microlink Devices, a leader in metalorganic chemical vapor deposition (MOCVD) and epitaxial lift-off (ELO) junctions.

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

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