Quality control using luminescence imaging in production of mcsilicon solar cells from umg feedstock

Abstract

We use photoluminescence imaging (PL) for quality control of the crystallization process at Fraunhofer ISE in order to find defects which will later limit the efficiencies of solar cells. Bricks of multicrystalline feedstock from electronic grade (EG) and upgraded metallurgical (UMG) silicon are subsequently wafered and solar cells are manufactured using a… (More)

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