Effect of oxygen precipitates in solar grade silicon on minority carrier lifetime and efficiency of solar cells

Effect of oxygen precipitates in solar grade silicon on minority carrier lifetime and efficiency of solar cells

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摘要 The effect of oxygen precipitates on minority carrier lifetime and performance of solar cell was studied by means of Fourier Transform Infrared Spectroscopy (FTIR), quasi-steady state photoconductance (QSSPCD), optical microscope, spectrum response and solar cell efficiency test. The minority carrier lifetime and performance of solar cell reduced depend on oxygen precipitates. A few of oxygen precipitates have formed after single-step annealing; and they do not impact the efficiency dramatically. Pre-annealing at 650 ℃ for 4 h enhances the oxygen precipitation when it is subjected to middle temperature annealing. The solar cells performance decayed sharply. Especially annealing at 950 ℃ for 3 h, the Vos and Isc of cells decrease 12% and 25% respectively. Few oxygen precipitates have formed in silicon after high temperature annealing at about 1050 ℃ whether pre-annealing is used or not, and the performance of cells is not be affected. The effect of oxygen precipitates on minority carrier lifetime and performance of solar cell was studied by means of Fourier Transform Infrared Spectroscopy (FTIR), quasi-steady state photoconductance (QSSPCD), optical microscope, spectrum response and solar cell efficiency test. The minority carrier lifetime and performance of solar cell reduced depend on oxygen precipitates. A few of oxygen precipitates have formed after single-step annealing; and they do not impact the efficiency dramatically. Pre-annealing at 650 ℃ for 4 h enhances the oxygen precipitation when it is subjected to middle temperature annealing. The solar cells performance decayed sharply. Especially annealing at 950 ℃ for 3 h, the Vos and Isc of cells decrease 12% and 25% respectively. Few oxygen precipitates have formed in silicon after high temperature annealing at about 1050 ℃ whether pre-annealing is used or not, and the performance of cells is not be affected.

作者 SUN Haizhi LIU Caichi HAO Qiuyan WANG Lijian

机构地区 Institute of Information Functional Material

出处《Rare Metals》 SCIE EI CAS CSCD 2006年第z1期141-145,共5页 稀有金属（英文版）

基金 This project was financially supported by the National Natural Science Foundation of China (No.50572022).

关键词 SILICON oxygen precipitate solar cell ANNEALING silicon oxygen precipitate solar cell annealing

分类号 TG146.4 [金属学及工艺—金属材料]

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Effect of oxygen precipitates in solar grade silicon on minority carrier lifetime and efficiency of solar cells

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