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Dependence of photoconductivity on the dark Fermi level position in amorphous silicon alloys

 

作者: M. Hack,   S. Guha,   M. Shur,  

 

期刊: Applied Physics Letters  (AIP Available online 1984)
卷期: Volume 45, issue 4  

页码: 467-469

 

ISSN:0003-6951

 

年代: 1984

 

DOI:10.1063/1.95218

 

出版商: AIP

 

数据来源: AIP

 

摘要:

We present results of a new model to describe the dependence of the room‐temperature steady‐state photoconductivity in amorphous silicon alloys upon the position of the dark Fermi level. This dependence is a consequence of both a change in the recombination path and dopant‐created gap states. We also demonstrate the relationship between the power dependence of photoconductivity and dark Fermi level position and show that as a result of space charge neutrality, this dependence can be related to a characteristic energy slope of the density of states only in the absence of injected charge or dopants. Moreover, in agreement with recent experimental data, we show that our model predicts a power dependence of less than 0.5 for high‐intensity illumination onn‐type amorphous silicon.

 

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