Spring 2025 Update – A New Product, Big Research and a Brand-New Website
Welcome to the new Fluxim website! If you're reading this, you've probably noticed things look a little different. We've redesigned it to be faster and easier to navigate, so you can find the right R&D tools and surface helpful research more efficiently.
Here’s what else is happening at Fluxim:
New R&D Software
We’re launching several new tools this year. While most are still under wraps, we are excited to share that our new software Opix will be competing in the I-Zone Awards at SID Display Week in San Jose. Further details here.
Research Spotlight: EPFL
A standout publication from our colleagues at EPFL shows ETU-stabilised perovskite solar cells lasting beyond 2,100 hours. Their work, carried out using our Litos platform, highlights real-world device stability, and they’ve even shared a testimonial about their experience. Read it here.
Webinar News
Missed our last webinar? You can watch the full recording now. And don’t miss the next one featuring our guest speaker, Dr. Jonathon Schrecengost from OLEDWorks. Register here.
What Else?
Fluxim hosts OLED PhD students for hands-on training as part of the TADFsolutions network.
We’re attending HOPV 2025 – let’s connect if you’ll be there
What’s your research approach? Tell us how you’re pushing innovation in your lab
Thanks for stopping by—have a look around the new site and let us know what you think.
Our latest Software to Compete at Display Week - Opixs
Fluxim’s CEO, Beat Ruhstaller, is heading to Display Week 2025, the premier event for display and visual tech innovation. This year's hot topics include AI in imaging, ultra-high bandwidth data transmission, integration on glass, and sustainable displays.
Our Latest Simulation Software is Selected for the I-Zone Awards
Beat will be presenting our latest software innovation, Opixs—a finalist for the I-Zone Awards!
Opixs is our new tool for display power and color gamut optimization, enabling precise power simulation across various subpixel concepts such as RGB, RGBW, stacked, and TurboLED pixel layouts.
If you happen to be in San Jose and would like to visit the exhibition free of charge (normally costing $200 for non SID members) please use the code below.
Free Access to Display Week Exhibit Hall with our code: Bg6LSkrk
Poster Presentations
If you miss him at the I-Zone booth, you can also catch him during the poster session, where Beat will be presenting the following posters from Fluxim researchers:
Triplet Dynamics in OLEDs – Edoardo Stanzani (P-205)
Exciton Degradation in TADF OLEDs – Dr. Balthasar Blülle (P-212)
EPFL researchers achieve breakthrough in solar cell durability
EPFL researchers have achieved a major leap in solar cell durability using ETU-treated perovskites and Fluxim’s Litos platform. By suppressing stacking faults in FA-rich perovskite films, the team delivered record-setting lifetime performance:
✅ >93% PCE retention after 2100 hours under continuous MPP tracking (ISOS-L1)
✅ T₈₀ >600 hours at 65 °C for 1 cm² devices
✅ T₈₀ ~7200 hours at 65 °C for masked 0.2 cm² devices
These results, among the best ever reported, were validated using Litos from Fluxim, which provides four chambers with individual SMUs for parallel characterizations, temperature controllers, atmosphere sensors, and a stable LED illumination on each chamber.
“The Fluxim Litos platform played a crucial role in acquiring high-quality stability data. The ability to test under controlled illumination and temperature while continuously tracking MPP provided reliable insights into long-term device performance. The option to have independently operable measurement chambers allowed us to obtain stability data for multiple test conditions in parallel, which is a big advantage of Litos,” said Mostafa Othman (EPFL).
🔬 Read how additive-driven crystal engineering and reliable testing tools are paving the way for next-gen solar tech.
More Notable Research
Ion Migration in Mesoscopic Perovskite Solar Cells: Effects on Electroluminescence, Open Circuit Voltage, and Photovoltaic Quantum Efficiency
M. A. Torre Cachafeiro, E. L. Comi, S. Parayil Shaji, S. Narbey, S. Jenatsch, E. Knapp, W. Tress,
Adv. Energy Mater. 2025, 15, 2403850. https://doi.org/10.1002/aenm.202403850
This study explores the impact of ion migration in carbon-based triple mesoscopic perovskite solar cells (CPSCs), focusing on its effects on electroluminescence (EL), open-circuit voltage (VOC), and current collection. The authors show that slow EL transients arise from the redistribution of two ionic species with different mobilities, resulting in an increased density of mobile ions over time. Both forward bias in the dark and open-circuit illumination lead to similar changes, increasing VOC but degrading current collection due to electric field screening.
How Setfos and Paios Contributed to this Research:
Setfos:
Drift-diffusion device simulations with a 1D-approximation of the CPSC architecture.
Simulation of the EL yield, recombination currents, ionic distributions, band diagrams, and EQE spectra.
Modelled two types of mobile ions (fast cations and slow anions) to reproduce observed transients.
Allowed visualization of electric fields and carrier densities over time and space.
Enabled simulations under various preconditioning voltages to match EQE experiments.
Paios:
Controlled temperature-dependent measurements with a Linkam cryostat stage.
Used for impedance spectroscopy, transient discharge currents, and EL yield dynamics.
Supported measurements of EL under cyclic biasing, which helped link ionic migration and recombination.
Fluxim hosts the TADFsolutions network.
We recently hosted the TADFsolutions doctoral network project meeting at our offices in Winterthur. This EU Horizon Doctoral Network brings together leading OLED researchers from academia and industry to train the next generation of experts in sustainable, high-performance, solution-processed OLED materials.
As a consortium partner, we welcomed 12 Doctoral Fellows for hands-on training with our simulation and measurement tools used in OLED and display R&D.
This event highlighted the value of connecting research with real-world applications. The fellows gained insight into the industrial challenges faced by OLED developers and the importance of practical tools in advancing innovation.
TADFsolutions is more than a research network; it's a launchpad for young scientists. Through secondments, international exchange, and collaboration with partners like Merck KGaA, Fraunhofer, and Kyoto University, these fellows are becoming globally minded, highly employable researchers ready to drive the future of OLED technologies.
Upcoming: Webinar 13 – Multi-Stack OLEDs in Automotive, Lighting & Microdisplay Applications
🗓 Tuesday, May 6, 2025 | 15:00–16:00 CET
Join Dr. Jonathon Schrecengost (OLEDWorks) as he explores the use of multi-stack OLEDs in real-world applications, from cars to micro-displays. Learn about practical engineering challenges and innovations driving adoption in commercial products.
Speaker: Dr. Jonathon Schrecengost, OLED Engineer at OLEDWorks.
Host: Dr. Daniele Braga, Head of Sales & Marketing, Fluxim AG.
Location: Online | Hosted by Fluxim, Winterthur, Switzerland
Missed the last webinar? Watch it here.
Topic: Potential and Challenges for Cu(In,Ga)Se₂ as a Bottom Cell in a Tandem Structure
Speaker: Dr. Ana Kanevce, ZSW Germany
Recorded Live: April 15, 2025
This deep-dive webinar explores how CIGS can be optimized as a bottom cell in tandem structures. Based on simulation-backed experiments, the session is a must-watch for researchers in photovoltaics and tandem device engineering.
📌 Key Takeaways:
Blue-light filtering challenges in tandem structures.
Critical roles of buffer conductivity and band alignment.
Bandgap ambiguity in graded absorber layers.
Performance depends on the characteristics of the top cell.
Fluxim at HOPV 2025 in Rome
Fluxim’s Dr. Daniele Braga will be at the 17th International Conference on Hybrid and Organic Photovoltaics (HOPV25) from 12–14 May 2025 at Palazzo Brancaccio, Rome.
Talk by Daniele Braga (Fluxim AG)
Date: 13 May 2025 | 🕓 Time: 16:10–16:25 | 📍 Session: 2C3-O1
Title: Investigating Inhomogeneities and Turn-on Dynamics in Carbon-Based Perovskite Solar Cells Using Advanced Imaging and Simulation Techniques
Daniele will showcase how advanced tools can reveal spatial and temporal effects in carbon-based perovskite solar cells, unlocking new insights into performance and transient behaviour.
What’s Your Research Approach?
At Fluxim, we know every researcher works differently. That is why we offer powerful development tools tailored to your specific workflow—whether you're simulating devices, scaling up modules, or tracking long-term stability.
Meet the researchers:
✅ Paul uses Paios for automated characterization and precise parameter extraction.
✅ Selina designs better devices faster with Setfos simulations.
✅ Michael applies machine learning to simulation data with Setfos.
✅ Larissa scales devices to modules using Laoss.
✅ Lynn tracks solar cell degradation efficiently with Litos Lite.
✅ Tom accelerates OLED lifetime testing using Litos.
🧪 Whether you're in academia or industry, our Swiss-engineered tools empower your research with precision, speed, and reproducibility.
👉 What’s your research approach? Tell us in the comments