论文部分内容阅读
利用流体模型对光生载流子的输运进行了模拟研究,结果表明载流子在输运过程中形成的光激发电荷畴是产生电脉冲超快上升特性的主要原因.对光激发电荷畴的形成和吸收过程的进一步研究表明:1)形成过程中的光激发电荷畴增强了电子的浓度梯度;2)光激发电荷畴在被阳极吸收的过程中,光电导开关偏置电压的快速下降能促进电流上升速度.光激发电荷畴的形成和吸收两大过程共同作用下,形成了电脉冲的超快上升特性.
The transport model of photogenerated carriers was simulated by using the fluid model. The results show that the photo-excited charge domains formed during carrier transport are the main reasons for the ultrafast rise of electric pulses. Further studies on the formation and absorption processes show that: 1) photo-excited charge domains during formation enhance the electron concentration gradient; 2) the photo-induced charge domains rapidly decrease in the phototransistor bias voltage during absorption by the anode And promote the current rising speed.The formation and absorption of photo-excited charge domains under the combined effect of two processes, the formation of the ultra-fast rise of the electrical pulse characteristics.