METHODS AND APPARATUS FOR DETECTION AND CLASSIFICATION OF SOLAR CELL DEFECTS USING BRIGHT FIELD AND ELECTROLUMINESCENCE IMAGING

摘要

Methods and apparatus for integrated, in-line metrology of solar cells involve three distinct inspection and testing operations, prior to string and module assembly. Two of the inspections are performed by image analysis using bright field illumination. The third inspection involves electroluminescence imaging, where luminescence in the solar cell is achieved by inducing a forward bias in the solar cell, and analyzing a resulting grayscale image for defects.