The optical model of the setfos absorption module is based on the transfer matrix formalism for fast calculation of the photon flux across the solar cell stack. Sequences of coherent and incoherent layers are computed to get all quantities inherent to optical coatings and solar cells.
Maximize the absorption of a single layer, optimize the thickness combination in your stack, adjust and match the short-circuit currents of tandem solar cells and much more!
- Layer-specific absorbances
- Passive optics characteristics ( reflectance, transmittance, absorbance spectra, angular dependences, polarization)
- Arbitrary combination of coherent and incoherent thin film optics
- Spectral penetration of external illumination
- Arbitrary illumination spectrum
- Light scattering: in a mixed coherent/incoherent layer stack.
- Maximum power point calculation in coupled solar cell simulations
Setfos' versatile model is suited for all thin film PV technologies.
Organic Solar Cells
Setfos contains a database of common organic photovoltaic materials (OPV). You can maximize absorption in the active layer. Common experiments like CELIV are available for simulation.
Perovskite Solar Cells
Methylammonium lead-iodide perovskite solar cells are breaking records every week, it seems. Setfos absorption simulation contains the tools to tune the layer stack. Whether you are looking to cover an absorption window for a tandem device or a stand-alone perovskite cell.
Inorganic Thin Film Cells
Setfos transfer matrix formalism is suitable for all thin film simulations both Si based (cystalline or not) or based on different semiconductor families like CdTe and CIGS.
Coupled Opto-Electrical Simulation
The Setfos absorption module is fully coupled to electrical drift-diffusion simulations. Absorbed light provides the charge generation profile throughout the active layer. Transport and extraction of the charges finally leads to the short circuit current, fill factor and open-circuit voltage.
Vary the incident spectrum and angle to see how the cell behaves in different locations and times of day.
Light Management Layers
Scattering layers are used to enhance the abosprtion of thin film solar cells. Setfos uses different light scattering algortihms to calculate the influence of light scattering on absorption. You can model:
- Scattering directly from AFM roughness data
- Scattering by microparticle dispersed in the bulk
- Co-optimize the layer stack and the scattering layer
- Micro-structure simulation from ray-tracing
- Scattering structure outside or inside the layer stack