光敏二极管响应时间的计算

光敏二极管响应时间的计算 CALCULATING RESPONSE TIME OF BASE REGION IN PHOTODIODE 何民才 He Mincai Yao Duanzheng first-author 姚端正 本文求解了光敏二极管基区的连续性方程,得到了瞬态光电流的分析表达式并进行了数值计算。结果表明,光敏二极管的响应时间与入射光的波长和基区少子寿命相关。响应时间随寿命变化的曲线可以用作测量基区少子寿命。分析指出,采用硅外延片做衬底材料,可以提高光敏二极管的响应速度。 The analytical expressions of the transient photo-current have been obtained by solving the continuity equations of base region in a photodiode. The digital calculation shows that the response time of the photodiode changes greatly with the wavelengths and also correlates closely to the lifetime of the minority carriers in the base region. The lifetime-response time curve computed gives a simple method to measure the lifetime of the minority carriers in the base region. 1986-01-01 2021-04-01 1