Publications [#66425] of Nan M. Jokerst

Papers Published

1. Augustine, Godfrey and Rohatgi, Ajeet and Jokerst, Nan Marie, Base doping optimization for radiation-hard Si, GaAs, and InP solar cells, IEEE Transactions on Electron Devices, vol. 39 no. 10 (1992), pp. 2395 - 2400 [16.158814]
   (last updated on 2007/04/16)

   Abstract:
   It is shown that the nature of radiation-induced point defects and dopant interactions can cause a shift in the optimum base doping concentration for terrestial and space solar cells. The base doping concentration has been optimized for high-efficiency Si, GaAs, and InP solar cells before and after electron irradiation. A combination of detailed carrier lifetime calculations and cell modeling is used to show that the optimum doping concentration for irradiated cells increases for InP cells, decreases for Si cells, and remains essentially unchanged for GaAs cells compared to their counterpart terrestial cells. The optimum base doping for Si cells decreases from 8.94 × 10¹⁶ cm^-3 to approximately 6.6 × 10¹⁴ cm^-1 after 1-MeV electron irradiation. In the case of GaAs, the optimum base doping concentration remains at approximately 2 × 10¹⁷ cm^-3 for both irradiated and unirradiated cells. The InP base doping needs to be increased in the range of (2-6) × 10¹⁷ cm^-3 from 2 × 10¹⁷ cm^-3 for radiation fluences in the range of 10¹⁵ to 10¹⁶ cm^-2 in order to achieve the highest efficiency after irradiation.

   Keywords:
   Doping (additives);Optimization;Silicon solar cells;Diffusion;Charge carriers;Semiconducting gallium arsenide;