Learning Forum

[Mariah Ha]

Hi, 

I am simulating a pin diode in Charge. I am using the electrical boundary condition to apply a voltage at the anode and at the cathode. Is it mandtory to add a surface recombination boundary condition between Si/Al and between the other materials , for example Glass/Si ...or is it optional? I am asking because if I add these surface recombination velocities boundary conditions, I get a warning when I check the simulation (check button) mentioning that there are duplicate surfaces for boundary conditions. 

Regards.

[Guilin Sun]

No. Usually the surface recombiation is set in the material property.

https://optics.ansys.com/hc/en-us/articles/360034404814-addsurfacerecombinationbc-Script-command 

I case you need to set, please unceck "apply to majority carriers" and the parameter values should be proper.

Simulation Objects - Boundary Conditions

2D silicon square grating solar cell

 

[Mariah Ha]

Thank you for the prompt answer. When should i use the surface recombination boudary conditions if it is already set in the material ?