This paper investigates the infrared absorption spectra of oxygen-related complexes in silicon crystals irradiated with electron （1.5 MeV） at 360 K.Two groups of samples with low [Oi] = 6.9 x 10^17 cm^-3 and high [O...This paper investigates the infrared absorption spectra of oxygen-related complexes in silicon crystals irradiated with electron （1.5 MeV） at 360 K.Two groups of samples with low [Oi] = 6.9 x 10^17 cm^-3 and high [Oi] = 1.06 x 10^18 cm^-3 were used.We found that the concentration of the VO pairs have different behaviour to the annealing temperature in different concentration of oxygen specimen,it is hardly changed in the higher concentration of oxygen specimen.It was also found that the concentration of VO2 in lower concentration of oxygen specimen gets to maximum at 450 ℃ and then dissapears at 500 ℃,accompanied with the appearing of VO3. For both kinds of specimens,the concentration of VO3 reachs to maximum at 550 ℃ and does not disappear completely at 600 ℃.展开更多
The isovalent element Ge doped into CZ-Si can effectively suppress the forming rate of oxygen donors andreduce their maximal concentration. The mechanical strength of silicon wafers can be increased by this proce-dure...The isovalent element Ge doped into CZ-Si can effectively suppress the forming rate of oxygen donors andreduce their maximal concentration. The mechanical strength of silicon wafers can be increased by this proce-dure. The mechanism of above phenomena has been discussed.展开更多
对P型Cz-Si太阳能电池进行光致再生(LIR)测试,探寻抑制光致衰减(LID)效应的解决方案。选取A、B组电池样品各4片,在230℃下,A组分别采用[1,10,20,30]k W/m^2的光照功率进行10 s的LIR处理、B组采用20 k W/m^2的光照功率分别进行[10,20,30,...对P型Cz-Si太阳能电池进行光致再生(LIR)测试,探寻抑制光致衰减(LID)效应的解决方案。选取A、B组电池样品各4片,在230℃下,A组分别采用[1,10,20,30]k W/m^2的光照功率进行10 s的LIR处理、B组采用20 k W/m^2的光照功率分别进行[10,20,30,40]s的LIR处理;A、B组均在2 k W/m^2光照功率、85℃温度下进行10 H的LID测试,考察LIR后和LID后的电池转换效率相对变化值。随着光照功率的增大,LIR后的相对变化值由0.148%提升至0.792%,LID后的相对变化值由-2.608%改善至-0.396%,效果显著;随着光照时间的推移,LIR后的相对变化值由0.695%提升至0.939%,LID后的相对变化值由-0.794%改善至-0.395%,不甚显著。对现象成因进行讨论,表明高光照功率激发了电池硅基体内部的H^+、H^0和H^-,其中H^0和H^-存在的电子能够分别对硅基体内部和表面进行钝化,提升其少子寿命;H^+能够与B^-结合成BH复合体,阻碍BO复合体的生成,从而抑制电池的LID效应。展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No 50872028)Natural Science Foundation of Hebei Province of China (Grant Nos E200500048 and E2008000079)Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No 20050080006)
文摘This paper investigates the infrared absorption spectra of oxygen-related complexes in silicon crystals irradiated with electron （1.5 MeV） at 360 K.Two groups of samples with low [Oi] = 6.9 x 10^17 cm^-3 and high [Oi] = 1.06 x 10^18 cm^-3 were used.We found that the concentration of the VO pairs have different behaviour to the annealing temperature in different concentration of oxygen specimen,it is hardly changed in the higher concentration of oxygen specimen.It was also found that the concentration of VO2 in lower concentration of oxygen specimen gets to maximum at 450 ℃ and then dissapears at 500 ℃,accompanied with the appearing of VO3. For both kinds of specimens,the concentration of VO3 reachs to maximum at 550 ℃ and does not disappear completely at 600 ℃.
文摘The isovalent element Ge doped into CZ-Si can effectively suppress the forming rate of oxygen donors andreduce their maximal concentration. The mechanical strength of silicon wafers can be increased by this proce-dure. The mechanism of above phenomena has been discussed.
文摘对P型Cz-Si太阳能电池进行光致再生(LIR)测试,探寻抑制光致衰减(LID)效应的解决方案。选取A、B组电池样品各4片,在230℃下,A组分别采用[1,10,20,30]k W/m^2的光照功率进行10 s的LIR处理、B组采用20 k W/m^2的光照功率分别进行[10,20,30,40]s的LIR处理;A、B组均在2 k W/m^2光照功率、85℃温度下进行10 H的LID测试,考察LIR后和LID后的电池转换效率相对变化值。随着光照功率的增大,LIR后的相对变化值由0.148%提升至0.792%,LID后的相对变化值由-2.608%改善至-0.396%,效果显著;随着光照时间的推移,LIR后的相对变化值由0.695%提升至0.939%,LID后的相对变化值由-0.794%改善至-0.395%,不甚显著。对现象成因进行讨论,表明高光照功率激发了电池硅基体内部的H^+、H^0和H^-,其中H^0和H^-存在的电子能够分别对硅基体内部和表面进行钝化,提升其少子寿命;H^+能够与B^-结合成BH复合体,阻碍BO复合体的生成,从而抑制电池的LID效应。
