I want to simulate a perovskite solar cell. But when I calculate EQE, convergence error pops up and stops the simulation. I know what is Convergence error. But I don't know, how can I handle it in SCAPS.
Dear Saif,
Convergence errors arise when the consequent iterative solutions grows with time exponentially. One may have a divide by zero operation or a divide by small quantity such that the resulting number may be out of the maximum number that can be handled by the computer.
In case of device simulators as yours the software solve numerically the semiconductor equation with appropriate boundary and initial.
So, it may happen that the material parameters may have extreme values causing non convergence.
So, One of the practical approaches is to solve at first a problem with a known solution. This will help you to manage with the range of technological and physical parameters of your device.
Or to solve a generic device with very simplified structure.
The experience shows always that the selection of the semicondcutor parameters are the most causes for the non convergence.
Salwa Ibrahim used this software, and published a paper: Investigating the performance of formamidinium tin-based perovskite solar cell by SCAPS device simulation at the link: Article Investigating the performance of formamidinium tin-based per...
. You can contact her at the RG: https://www.researchgate.net/scientific-contributions/2170939643_S_AbdelazizBest wishes
Dear Saif,
Convergence errors arise when the consequent iterative solutions grows with time exponentially. One may have a divide by zero operation or a divide by small quantity such that the resulting number may be out of the maximum number that can be handled by the computer.
In case of device simulators as yours the software solve numerically the semiconductor equation with appropriate boundary and initial.
So, it may happen that the material parameters may have extreme values causing non convergence.
So, One of the practical approaches is to solve at first a problem with a known solution. This will help you to manage with the range of technological and physical parameters of your device.
Or to solve a generic device with very simplified structure.
The experience shows always that the selection of the semicondcutor parameters are the most causes for the non convergence.
Salwa Ibrahim used this software, and published a paper: Investigating the performance of formamidinium tin-based perovskite solar cell by SCAPS device simulation at the link: Article Investigating the performance of formamidinium tin-based per...
. You can contact her at the RG: https://www.researchgate.net/scientific-contributions/2170939643_S_AbdelazizBest wishes
Dear Saif,
Hope you have already found your solution to the existing problem in these 6 days after asking for favor.
If all of your input parameters are correct then, you can change the limit of lambda to a higher value. Hope this will simply solve the problem.
If you are still left with the problem, I can fix it. You need to specify the problem in more details.
Best regards,
Moon
Hi Saif,
I've faced similar issues when I wanted to try some new different semiconductors on my device, I solved this by a meticulous variation of simulation parameters of each layer, (which will be time consuming I guess), but one should know that sometimes experimental values introduced to SCAPS-1D will not easily work. Therefore, you should go systematically, first disable the series and shunt resistances, and then try to remove defects and try an "ideal prototype" of your solar cell, then you can adjust your parameters accordingly, and when you detect your faulty parameter you can enable Rs and Rsh again "and defects as well". SCAPS is very sensitive to those parameters, you should handle them very carefully.
However, dealing with perovskites and organic solar cells in SCPAS is quite tricky, as it was originally conceived for non-organic materials such as CdTe, CIGS and Si. There are few reports on the topic.
Best wishes.
- Badges
- Science topic