【摘要】 本文定量分析了样品厚度d及单色光的透入深度α^-1对表面光电压法测试少于扩散长度的影响,并从实验上进行了验证.本文还讨论了样品厚度对两点法直读少子扩散长度测试结果的影响,并给出从测得的表观扩散长度定出真实扩散长度的方法.观察了光生非平衡载流子的注入水平对扩散长度测试结果的影响.更多还原

【Abstract】 In SPV method,if the thickness of sample is comparable with the penetration depthof monochromatic light,the former will effect the measurement of minority carrier diffu-sion length.A quantitative analysis and experimental examination on this object are repor-ted.Similarly,in the simple SPV method of fast reading minority carrier diffusion lengthby taking measurements at two wave lengths,the thickness of sample also effects the me-asurement of diffusion length.A method of finding the real diffusion length from the appa-rent one is suggested.The effect of non-equilibrium carrier level on the measurement ofdiffusion length is observed as well.更多还原