Liu, B and Chen, KP and Kherani, NP and Zukotynski, S and Antoniazzi, AB
(2008)
Betavoltaics using scandium tritide and contact potential difference.
Applied Physics Letters, 92 (8).
ISSN 0003-6951
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 Physics.
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