外保护环短路不能减小光电二极管暗电流

Impossibility of the decrease in dark current of guard ring short circuited photodiodes

通过理论和实验证明了外保护环短路的光电二极管不仅不能减小暗电流,相反会增加暗电流。因此想用外保护环短路,以求减小光电二极管暗电流的方法是不可行的。其结果与预期的正好相反。

It is shown theoretically and experimentally that a photodiode with external guard ring short circuit can not decrease dark current—it will be increased instead. So this method is not feasible and turns out contrary to its original expectations.