EQE of III-V Tandem Cell

solarex17.in : EQE of III-V Tandem Cell

Requires: Blaze/Luminous
Minimum Versions: Atlas 5.28.1.R

This example demonstrates the methodology to simulate EQE of a tandem cell. This example, based on solarex03, will also show that EQE can be simulated using a non-local band-to-band tunneling model to model the tunnel diode in the tandem cell. An alternative approach is also shown and consist to replace the tunnel junction by an electrode with a very high resistance so that the current can flow from the top cell to the bottom cell without limitation. The results of both approaches are very similar.

In order to get EQE of the tandem cell special technique should be used. Indeed two cells are in series, thus the current is limited by the one that has the lowest current. The idea is to illuminate the one we do not want to characterize by applying a monochromatic beam with an intensity 10 times higher compared to cell under test. 2 beams were used in this input deck, one with a fixed monochromatic wavelenght and one with a variable wavelenght to characterize the cell under test in the tandem cell. The current resulting from the illumination using the monochromatic beam is then substracted to the total current, to get the current of the cell under test. EQE is obtained by dividing the current of the cell under test by the source photo current.

To load and run this example, select the Load button in DeckBuild > Examples. This will copy the input file and any support files to your current working directory. Select the Run button in DeckBuild to execute the example.