Normal laser damage of silicon solar cells without phase change

摘要

An experimental study has been made of the damage to floating zone (FZ) and pulled (CZ)nsol;phyphen;type silicon solar cells caused by a normal ruby laser. Although the cells were irradiated below the power density at which phase change occurred, the degradation of the normalized shorthyphen;circuit current was observed mainly in the longhyphen;wavelength region. This result indicates that some kind of thermal defects are induced by laser quenching. Approximately 60ndash;70percnt; of the laserhyphen;induced defects annealed out at room temperature.