PERFORMANCE STUDY OF p ⁺ /n AND n ⁺ /p SOLAR CELL STRUCTURES ON POLYCRYSTALLINE MATERIAL.

The possibility is explored of obtaining an analytical solution for the minority carrier distribution in a grain under illumination. The goal is to be able to analytically undertake performance study of p** plus /n and n** plus /p solar cell structures on polycrystalline material. It is shown that an analytical solution can be obtained in terms of Fourier and Fourier-Bessel series for a columnar grain under very general conditions. These conditions allow for grain boundary penetration from the top of a variable depth, grain boundary penetration from the bottom of a variable depth, and an arbitrary degree of passivation in the remainder of the grain boundary.