Betavoltaics using scandium tritide and contact potential difference
- 25 February 2008
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 92 (8)
- https://doi.org/10.1063/1.2887879
Abstract
Tritium-powered betavoltaic micropower sources using contact potential difference (CPD) are demonstrated. Thermally stable scandium tritide thin films with a surface activity of 15 mCi cm2 were used as the beta particle source. The electrical field created by the work function difference between the ScT film and a platinum or copper electrode was used to separate the beta-generated electrical charge carriers. Open circuit voltages of 0.5 and 0.16 V and short circuit current densities of 2.7 and 5.3 nA cm2 were achieved for gaseous and solid dielectric media-based CPD cells, respectively. © 2008 American Institute of PhysicsKeywords
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