Discussion Forum

Dear Users,

I am having a problem with passing results from the first study to the second study of my model. I am simulating a PIN solar cell and the simulation is divided into two parts:

- Study 1 – Light (EMW): emw simulation, electromagnetic waves simulation. The electric field due to a light intensity of 100 mW/cm^2 is calculated inside the full structure. From the electric field, the divergence of the Poynting amplitude vector is calculated and used for the calculation of the optical generation term G = div(S)/(hf);
- Study 2 - Electrical: drift-diffusion model. The previously calculated generation term G is used as the reaction terms in the transport of diluted species nodes (continuity equations).

The main problem is that when G is calculated in Study 1 and used in Study 2, there is NO photogenerated current density visible from the Current Density (voltage sweep) graph in Results. However, when EXACTLY THE SAME G profile (apart from a few random fluctuations), this time calculated with the Beer-Lambert law, is used (therefore with no data form Study 1), a photogenerated current IS VISIBLE from the same graph, showing an short circuit current of about 7mA/cm^2.

The two G are plotted in Generation Rate in Results. The two G are defined in Model 1 ->Definitions->Var1.

If the two G are basically the same, why there is a problem in passing values from Study 1 to Study 2?
How can I sort this out?

Thanks in advance,

Samuele