METHOD AND APPARATUS FOR ESTIMATING THE EFFICIENCY OF A SOLAR CELL

摘要

A method for estimating the efficiency of a solar cell to be manufactured from a wafer is disclosed, wherein the efficiency estimate is obtained from a density of crystallite boundaries on a surface of the wafer. In embodiments the density of crystallite boundaries is obtained from a digital image of the surface of the wafer, from which first a filtered image, and then a binary image is generated. The binary image is evaluated to obtain the density of crystallite boundaries. Alternatively, the efficiency estimate is obtained from the sizes of crystallites on the surface of the wafer. An apparatus for obtaining the efficiency estimate is also disclosed.