Silvaco ATLAS- impact ionization effect not reflected on I-V

[kb82kb]

I am trying to simulate a simple P-I-N Avalanche PhotoDiode structure with a narrow bandgap material. I have defined the SELB model parameters and I can plot/see the "impact generation rate" in the device structure after simulation. The impact generation rate changes if I change the impact ionization coefficient parameters. But surprisingly, the I-V curve remains the same. Anyone has any idea, what might be wrong?

I can post the code too in case someone is interested.

 

[vani srikanth]

Hey..sorry i may not be able to answer your query as i am new to the tool.Can u mail me the commands used in silvaco aTLAS adn ATHENA ??

 

[vds]

Hi! can u post the atlas code

 

[Colbhaidh]

Did you turn on band to band tunneling?

impact selb bbt.std

You may need to post your code....

 

[vani srikanth]

Hi,
I am working on the same concept in my project.There can be many reasons. It will be easy to find out the reason, if I debug the code. If you can share the code, I can do it for you.

Rgds
Vani