Modeling and simulation of spherical solar cells

A complete three-dimensional optical and electrical model is presented to simulate spherical solar cells. Photon interaction in the spheres is modeled using geometrical optics, and electrical aspects of the device is obtained by considering charge transport and continuity equations and by simplifying them using geometrical features of the device. Equations are numerically solved with appropriate boundary conditions using finite difference method. Spectral response and I-V curves are produced for different sets of parameters. Results of simulation presented indicate the effect of different surface and bulk material parameters on device performance.