Regeneration of boron-oxygen defects in monocrystalline solar cells made of Cz silicon
The efficiency of solar cells made of CZ silicon decreases by more than 1% in absolute figures under sunlight within a few hours (light induced degradation – LID). At the University of Konstanz a method was developed that makes it possible to stabilize the efficiency of the solar cell at nearly its output level. During production the solar cells are regenerated by either illumination at temperatures of between 100 and 230 degrees or applying voltage. The method can be easily integrated in the conventional manufacturing process and allows for an increase in efficiency by up to 5% rel.
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