# Fluxim AG

> Fluxim AG is a Swiss company based in Winterthur, Switzerland, that develops simulation software and measurement instruments for the research and development of solar cells (perovskite, organic and tandem PV), OLEDs, displays and light-emitting devices. Spun off from ZHAW in 2006, its tools are used by academic and industrial R&D groups worldwide and are cited in over 700 peer-reviewed publications.

Fluxim's portfolio pairs predictive simulation software with all-in-one characterisation hardware, so researchers can model, measure and fit the optical, electrical and thermal behaviour of thin-film semiconductor devices — from single cells to full modules.

## Simulation software

- [Setfos](https://www.fluxim.com/setfos-intro): Predictive simulation of solar cells and OLEDs — optical, electrical (drift-diffusion) and thermal modelling of JV curves, EQE, emission profiles and more, with fitting of experimental data.
- [Laoss](https://www.fluxim.com/laoss): Simulation software to design and optimise large-area devices and modules — lateral effects, electrode and busbar layouts, and current distribution.
- [Opixs](https://www.fluxim.com/opixs): Pixel-optimisation software for display and light-emitting devices (introduced 2025).

## Measurement instruments

- [Paios](https://www.fluxim.com/paios): All-in-one platform for electrical and optical characterisation of solar cells and OLEDs — JV/luminance, transient photocurrent/photovoltage, transient EL, charge extraction, CELIV, DLTS, impedance, capacitance-voltage, IMPS/IMVS and more, automated in one system.
- [Phelos](https://www.fluxim.com/phelos): Angular spectrometer for OLED emission analysis — combined EL and PL measurement to determine emission zone and emitter orientation by fitting with Setfos.
- [Litos Lite](https://www.fluxim.com/litos-lite): Parallel JV and stability analysis for solar cells.
- [Litos](https://www.fluxim.com/litos): Degradation and stability analysis of LEDs and OLEDs under controlled stress.
- [Vitios](https://www.fluxim.com/vitios): Compact imaging tool for solar-cell scale-up (introduced 2026).

## Setfos modules

- [Emission](https://www.fluxim.com/emission-module): OLED light emission — dipole emission, interference, cavity effects, outcoupling.
- [Absorption](https://www.fluxim.com/absorption-module): Optical absorption and charge-generation profiles.
- [Drift-Diffusion](https://www.fluxim.com/drift-diffusion-module): Electrical transport, recombination, JV curves and data fitting.
- [Scattering](https://www.fluxim.com/scattering-module): Light scattering, haze and outcoupling.
- [Thermal](https://www.fluxim.com/setfos-thermal): Self-heating and coupled electro-thermal simulation.

## Key pages

- [Setfos references & publications](https://www.fluxim.com/setfos-references): 250+ peer-reviewed publications using Setfos, plus user testimonials.
- [Free Setfos trial](https://www.fluxim.com/setfos-free-trial): One-month evaluation licence.
- [Software & hardware evaluation](https://www.fluxim.com/evaluate-free-software): Request an evaluation.
- [About Fluxim](https://www.fluxim.com/about)