Abstract

The aim of this paper is to develop accurate mathematical models to investigate Boron diffusion in textured solar cells. Most of the papers found in literature have investigated Boron diffusion in planar solar cells.  However, texturing affects significantly both Boron diffusion processes and cell performance. Since texturing creates extra defects in the valleys of texturing pyramids, increases the surface area of the cell, and causes significant residual stresses.  We are proposing and selecting from literature suitable diffusion models that provide Boron diffusion profiles for textured cells that are in good agreement with experiments found in literature. 

Numerical results showing the effects of texturing geometry on Boron diffusion for a sample solar cell will be presented, analyzed, and validated. We found that both the magnitude of the Boron diffusion concentrations and the Boron diffusion depths are decreasing with increasing texturing angles. Therefore, the optical efficiency will be significantly affected.

Keywords

Accurate models, numerical simulation, texturing geometry, Boron diffusion, solar cells.