I want to simulate an organic solar cell at open circuit voltage in silvaco (and with a large surface recombination). I have tried to do it by inserting a large resistance (RESIST=1e20) at contacts and setting VSURF=1e7, but it doesn't converge. how can i solve this problem?
Hi Ali, you don't give the size of the cell, or the expected current. In practice there won't be any difference between the open circuit voltage when the cell is supplying say 10-6 of its rated current, and when it's supplying zero current. You can safely use much lower shunt resistance than 10e20. I have had a lot of problems making arrays of cells simulated with a PSPICE like program and sympathise with you! There's nothing you can do to the program - sometimes the results converge, sometimes they don't and you can't see why!
If you have tried all reasonable values of variables and it still won't converge, check your equivalent circuit. There may be some inherent contradiction in it somewhere.
Best wishes!
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Carbon Materials
- Graphite
- Graphene