High open-circuit voltage betavoltaic cell based on GaN pin homojunction
- 1 January 2011
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 47 (12), 720-722
- https://doi.org/10.1049/el.2011.1143
Abstract
A high open-circuit voltage betavoltaic cell based on a GaN pin homojunction is demonstrated. A process of doping compensation has been developed to achieve high resistance i-GaN film for betavoltaics. Under 0.5 mCi 63Ni source irradiation, the open-circuit voltage of the fabricated GaN pin homojunction betavoltaic cell was measured as high as 1.65 V. A fill factor of 54% and a 2.7% lower bound on the power conversion efficiency were obtained. The results suggest GaN is a highly potential candidate for the long-life betavoltaic cell.Keywords
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