Gallium Nitride Direct Energy Conversion Betavoltaic Modeling and Optimization
Army Research Laboratory Adelphi United States
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This paper analyzes the use of a wide-bandgap betavoltaic towards use as a long lasting low power battery for various applications. The paper establishes a model for gallium nitride betavoltaics through use of experimentation and software tools. Software tools include Silvaco ATLAS and MCNPX, a simulation model is formed and analyzed to identify the parameters that create the most impact on optimization. Optimization can only occur through a verified model. The depletion region provides the most discernible effect towards device efficiency. Design approaches that best match the beta range to the limits of gallium nitride device characteristics are discussed.
- Electrochemical Energy Storage
- Electrical and Electronic Equipment