Fluxim

Fluxim FLUXiM AG provides swiss-made software and hardware for R&D on OLEDs, displays, lighting and solar cells to industry and academia worldwide. In 2006 Prof.

FLUXiM AG is a Swiss company that provides simulation software and measurement hardware for research and development of displays, lighting, and photovoltaic cells in industry and academia. Our company name FLUXiM is derived from flux simulation. Our activity started at the Institute of Computational Physics at the Zurich University of Applied Sciences. Dr Beat Ruhstaller founded FLUXiM as a spin-o

ff company. Our software products Setfos and Laoss are designed to simulate the fundamental operational mechanisms of LEDs and solar cells (organic, perovskites and quantum-dots), also at the large-scale. Light-outcoupling from OLEDs, light-absorption in thin-film solar cells, but also charge generation, transport and recombination in these semiconductor devices are all mechanisms that can be simulated with our software. Setfos and Laoss are simulation software that boosts research and development of OLEDs, displays, lighting panels, solar cells, and photovoltaic arrays. Our hardware products Paios, Phelos and Litos are all-in-one measurement platforms with integrated analysis software for electrical and optical device characterization, parameter extraction, and model validation. We also provide services such as consulting, training, software development, and specific device characterization for prospectives. Check out our references and testimonials for more information about our activities.

A bifacial module sees light from both sides. An indoor PV device sees a lamp spectrum that looks nothing like sunlight....
24/08/2026

A bifacial module sees light from both sides. An indoor PV device sees a lamp spectrum that looks nothing like sunlight. A tandem EQE measurement needs each subcell at its own bias light.

None of those is a single beam of AM1.5 arriving normal to the surface.

Setfos 6.1 makes them first-class citizens of the simulation. Details in the newsletter.

https://www.fluxim.com/newsletters/setfos-6-1-release-multiple-light-sources-impls
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IMID 2026 draws to a close today. It has been a great few days packed with presentations, customer meetings and some ver...
21/08/2026

IMID 2026 draws to a close today. It has been a great few days packed with presentations, customer meetings and some very impressive innovations in display technology from Samsung Display, LG Display and others.

A few highlights that caught our attention:

• LG Display’s FLiPP technology – a new FMM-free OLED pixel-patterning process that could enable higher brightness, longer lifetime and lower power consumption.

• Samsung Display’s WideView OLED – designed to improve brightness and image uniformity across the curved areas of foldable displays.

• Samsung Display’s 300 Hz OLED laptop panel – a 16-inch 2.5K OLED pushing OLED further into high-performance gaming applications.

The Fluxim team, Beat Ruhstaller and Moon Heo will still be available for the rest of the day to discuss your research and development projects.

Drop by booth 32 and tell us what display challenge you’re working on.

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We’ll be at IMID 2026 in Busan from August 18–21.You can find Fluxim at Booth 32, where Beat Ruhstaller and Moon Heo wil...
17/08/2026

We’ll be at IMID 2026 in Busan from August 18–21.

You can find Fluxim at Booth 32, where Beat Ruhstaller and Moon Heo will be available to discuss OLED and display research, simulation workflows, measurement strategies and whatever device challenges you’re currently working through.

We’ll also have our simulation and measurement tools on hand:

Setfos for OLED and solar-cell device simulation
Paios for electrical and optical characterization
Phelos for angle-dependent EL and PL measurements
Litos for OLED degradation and stress testing

If you’d like to see a demonstration, compare approaches or simply have an informal technical conversation, come by the booth.

Event details: https://www.fluxim.com/events/imid-2026-meet-fluxim-in-busan

Emitter orientation is a key parameter in OLED performance.The distribution of dipoles in the emissive layer directly in...
14/08/2026

Emitter orientation is a key parameter in OLED performance.
The distribution of dipoles in the emissive layer directly influences light outcoupling and overall device efficiency.
Yet in many workflows, it is still inferred indirectly or not quantified with sufficient accuracy.

Phelos enables:
✅ Angle- and polarization-resolved PL and EL measurements

✅ Model-based extraction of dipole orientation

✅ Consistent data for optical simulation workflows in Setfos to determine the emission zone in your device

This allows you to move from assumptions to quantitative device understanding, reducing uncertainty in OLED stack design.
If you are working on high-efficiency OLEDs, emitter orientation should be part of your standard characterization

Request a Demo today https://www.fluxim.com/phelos

Moon Heo will be presenting a poster at IMID 2026 on the differences between solution-processed and evaporated OLEDs:“De...
12/08/2026

Moon Heo will be presenting a poster at IMID 2026 on the differences between solution-processed and evaporated OLEDs:

“Detailed Electro-Optical Loss Analysis of Solution-Processed vs. Evaporated OLEDs”

You can find Moon during Poster Session I on Wednesday, August 19, from 16:20 to 17:50. The poster code is P1.

Moon will be at the conference throughout the week and is always happy to talk about OLED simulation, measurement and characterization strategies, or the practical challenges involved in connecting experimental results with device models.

If you’re working on similar questions, stop by the poster session or come and see us at Booth 32.

https://www.fluxim.com/events/imid-2026-meet-fluxim-in-busan

If you’re attending IMID 2026 in Busan, Beat Ruhstaller will be giving two talks on OLED device modelling.His invited ta...
06/08/2026

If you’re attending IMID 2026 in Busan, Beat Ruhstaller will be giving two talks on OLED device modelling.

His invited talk looks at comprehensive opto-electronic OLED modelling, including thermal effects and degradation:

“Comprehensive Opto-electronic OLED Device Modeling Considering Thermal and Degradation Processes”

August 20 | 12:15–12:40Session: AI for Computational EngineeringCode: F33-4Room F (313)

The following morning, Beat will present work on ultrathin emission layers with a double-emitter configuration:

“Analysis of efficient, ultrathin EML OLEDs with double-emitter configuration”

August 21 | 10:15–10:30Session: OLEDs-SimulationCode: A46-4Room A (211–213)

Both talks are closely connected to the work we do at Fluxim on understanding OLED performance through physics-based simulation.

More information: https://www.fluxim.com/events/imid-2026-meet-fluxim-in-busan

04/08/2026

Tutorial Tuesday
Every efficiency point we gain in organic PV is one we don't have to find somewhere else. In this turorial video we walk through your first organic solar cell simulation in Setfos, step by step.

Researchers, it's too hot to be outside, so you may as well put the afternoon to good use and model the perfect solar cell.

Free licence available, just scan the QR code at the end.

What you will learn:

Learn how to simulate an organic solar cell step-by-step using Fluxim’s Setfos software, guided by Dr. Urs Aeberhard (ETH/Fluxim AG).

This tutorial walks you through every stage of the simulation process: from defining the device geometry to analyzing current-voltage characteristics and understanding the impact of recombination.

“Although demonstrated with organic materials, the exact same steps in this Setfos simulation apply to perovskite solar cells, including geometry setup, optical modeling, and drift-diffusion simulation.”

00:00 How to perform Perovskite Solar Cell Simulations using Setfos
00:36 Create a New Device Layout
00:41 Define Geometry of the Layer Stack
01:56 Set Optical Properties of the Layers
03:30 Adjust Absorption Settings
03:57 Run the Simulation
04:22 Analyze Initial Results
06:01 Use the Sweep Function
06:47 Full Opto-Electronic Simulation (Drift-Diffusion)
10:27 Analyze Electrical Currents
12:01 Evaluate Performance vs. Shockley-Read-Hall Recombination

Enjoy!

Your device performs perfectly in the lab.So why does performance drop when you scale it up?As devices become larger, ne...
30/07/2026

Your device performs perfectly in the lab.
So why does performance drop when you scale it up?
As devices become larger, new effects begin to dominate: current crowding, sheet resistance, voltage drops and contact design. These losses are difficult to predict from small-area measurements, yet they often determine whether a design succeeds or fails.

That's where Laoss comes in.
Laoss combines semiconductor physics with finite-element simulation to reveal where electrical losses occur across complete devices and modules—not just how much performance is lost.

New in Laoss 4.4: support for multiple electrodes, enabling simulation of tandem solar cells, segmented contacts, pixelated displays and other advanced device architectures.

Instead of asking "What's my device efficiency?", Laoss helps answer:
• Where are the electrical bottlenecks?
• Which contact layout performs best?
• How much does a local defect matter?

The cheapest prototype is the one you never have to build.

Learn more: https://www.fluxim.com/research-blogs/laoss-4-4-multi-electrode-simulation

Adresse

Katharina Sulzer Platz 2
Winterthur
8400

Öffnungszeiten

Montag 09:00 - 17:00
Dienstag 09:00 - 17:00
Mittwoch 09:00 - 17:00
Donnerstag 09:00 - 17:00
Freitag 09:00 - 17:00

Telefon

+41445004770

Benachrichtigungen

Lassen Sie sich von uns eine E-Mail senden und seien Sie der erste der Neuigkeiten und Aktionen von Fluxim erfährt. Ihre E-Mail-Adresse wird nicht für andere Zwecke verwendet und Sie können sich jederzeit abmelden.

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