Abstract:

The total internal quantum efficiency (IQE) of a flat-band p-n homo-junction solar cell is calculated, and contributions of the separate parts analyzed. It has been found that both the cell part widths and the surface recombination velocities have significant influence on the IQEs. With mathematical transformation and approximation, the differential equation of the minority carrier density in a textured cell takes the same form as the flat cell. What makes differences is that texturization slightly enhances the IQEs for photons with longer wave lengths while notably increasing external quantum efficiency. Therefore it is important for the solar cell’s good performance. The results are of technical importance in designing solar cells and their surface structures.

Key words: homojunction, internal quantum efficiency, spectral response, texturization, flat band