Surface Acoustic wave (SAW) generation on solar cell

solarcell
recombinationrate

#1

Hi, I try to simulate effect of surface acoustic waves on solar cells. In order to make it simple, i will add a plane source wave to get surface acoustic waves instead of using interdigital transducer (IDT). But when i add that source, i am not sure the system works as following; electrons go to the minima of the periodic potential of SAW, and holes go to the maxima, as a result of this spatial separation,recombination of electrons and holes is suppressed.
I’m following solar cell tutorial in this page:
https://kb.lumerical.com/en/solar_cells_simple_silicon_planar.html
Which steps should we follow to simulate surface acoustic waves on solar cells?
If we add plane source, does the system works as mentioned above?
Which solver do we need to simulate first?
sorry for writimg long, I am looking forward to your help,
regards, thanks in advance.


#2

Hi @salih, I found this article (http://www.umerc.umd.edu/projects/solar05) while trying to figure out the mechanism behind the device you are trying to simulate. It looks to me that the separation of electrons and holes that you are talking about is coming from a potential variation that is created by a piezoelectric effect in the first place. I am guessing that this would require a mechanical solver to be coupled with the electrical solver; something we currently do not offer. It looks to me that simulating this effect is not possible by simply combining the CHARGE solver with FDTD.