[21p-KD-1~9] Advanced high efficiency and low cost crystal silicon solar cells

[21p-KD-3] Influence of Light Element on Bulk Lifetime in CZ-Si Crystal

〇Koichi Kakimoto¹, Yoshiji Miyamura¹, Hirofumi Harada¹, Satoshi Nakano¹, Bing Gao¹ (1.RIAM, Kyushu univ.)

Keywords:Silicon,Life time,Defect

Increase of minority carrier life time is required to improve efficiency of silicon solar cells. The life time has been reported to be influenced by the concentration of oxygen precipitates and grown-in defects. Furthermore, there is a report that the life time only depend on carbon concentration in the condition below 10¹⁴ atoms/m³. This paper reports the effect of carbon concentration on the life time in a crystal with high range of oxygen concentration.