Featured in Racing towards high performance – 06-2019

Losses as high as 10%

Giso Hahn is a professor at the University of Konstanz and one of the leading experts on light-induced degradation in solar modules. His research group developed countermeasures against the effect on standard monocrystalline technology years ago. Now it is time to address PERC.

By

Michael Fuhs

04 Jun 2019

Giso Hahn | Image: Giso Hahn

LID and LeTIDLID, which stands for light-induced degradation, and LeTID (light and elevated temperature induced degradation) are two degradation effects currently being discussed, primarily in connection with PERC modules. LID is a well-known problem caused by boron-oxygen defects in wafers. However, only monocrystalline silicon produced by the Czochralski (Cz) process has a high oxygen content. …

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