摘要
在低温下观察到半导体多晶薄膜的瞬态光电导现象.给出了三维理论模型.理论研究表明,陷阶引起光电导,光生载流子通过隧道效应实现复合,使光电导逐渐衰减.我们的实验结果与理论计算结果符合得相当好.
The transient photoconductivity in a semiconductor polycrystal thin film has been observed at low temperature. A three dimension theory model is given in this paper.The theoretical research demonstrates that trapping and recombination of photoexcited carriers is realized by a tunneling effect,which results in the photoconductivity decay. Our experirnental results are in good agreement with the theoretical calculated results.