Research Blogs
Characterization Suite 4.5 helps researchers get more from Paios, Phelos and Litos
Characterization Suite 4.5 enhances the software environment for Paios, Phelos and Litos, helping researchers move faster from measurement to interpretation. With new post-processing tools, expanded measurement capabilities, improved stability workflows and a stronger 64-bit software foundation, the release supports more efficient OLED, solar cell, photodetector and ageing studies.
What is Opixs and why do you need it?
Opixs is Fluxim’s new simulation tool for analysing OLED pixel structures, power efficiency, colour performance and novel display concepts such as tandem and TurboLED®. This article shows how Opixs evaluates layouts, brightness scaling and roll-off to guide better display design.
Multi-Stack OLED Simulation with Setfos and Laoss – Automotive OLEDs, Lighting, Microdisplays
Learn how OLEDWorks uses Fluxim’s Setfos and Laoss to develop high-performance multi-stack OLEDs for automotive lighting, microdisplays, and sustainable lighting solutions. Includes simulation strategies, case studies, and performance outcomes.
TADF OLEDs and Hyperfluorescent OLED Simulation with Setfos
Simulation of Organic light‐emitting diodes (OLEDs) using thermally activated delayed fluorescence (TADF). Emission zone analysis and a parameter study. Possible routes for efficiency enhancement.
Quantifying Electro-Optical Cross-Talk in White OLED / Color Filter Displays
Understanding electrical and optical cross-talk effects in displays by using simulation and characterization. Reduction of the cross-talk deleterious effect.
Advanced OLED Research with Setfos – Insights from Professor Chris Giebink
Discover how Professor Noel Giebink and his team use Setfos to advance OLED research. Learn how Setfos simulations help optimize device performance, improve efficiency, and push the boundaries of OLED technology. Get a free 1-month evaluation license today!
Space Charge Limited Current (SCLC) and Charge Carrier Mobility in Organic Semiconductors
Discover how charge carrier mobility is measured in organic and perovskite semiconductors. This guide explains the Space Charge Limited Current (SCLC) method, with its key advantages, limitations, and applications.
A Tutorial on Drift-Diffusion simulations
This tutorial introduces the fundamental drift-diffusion equations used to simulate charge transport and recombination in OLEDs, photodetectors, and solar cells. As a case study, we analyze the response speed of narrowband organic optical upconversion devices (OUCs), highlighting how mobility and recombination processes affect device performance.
How to Improve Measurement Accuracy of LED and PV Devices with a Common Electrode
Non-metalized contact pads and shared electrodes can undermine the accuracy of solar cell and LED measurements due to high contact resistance, distorting current-voltage (IV) curves and resulting in incorrect maximum-power-point (MPP) and open-voltage circuit (Voc) values. However, solutions exist: metallizing contact pads with gold or silver can reduce resistance issues, and avoiding common electrodes in multi-pixel designs can further enhance measurement accuracy, leading to improved reliability and efficiency in solar cells and LEDs.
Angular Resolved Photoluminescence and Electroluminescence of light emitting materials
Setfos can analyze angular-dependent PL data collected by Phelos to get information about the properties of an organic emitter, such as the orientation of the dipoles and the width of the emission zone. With this analysis, we are able to optimize the characteristics of our OLEDs for high EQEs.
Influence of recombination rates on transient photoluminescence and efficiency of TADF OLEDs
OLEDs made by thermally-activated delayed fluorescence (TADF) materials as emitters promise an IQE of 100%. Here, we want to present an analysis of the influence of non-radiative recombination rates (knrs and knrt) on the device efficiency as well as how to determine them from experiments. As we will see, the knr rate influences PLQY, and consequently ELQY, hence the negative impact on EQE.
First, to determine the non-radiative decay rates, we need to extract the rates kf, krisc, and kisc by fitting transient photoluminescence (trPL) measurements of TADF films.
3D Master Equation for Exciton dynamics in oleds
We describe a novel simulation approach for excitons in organic light-emitting diodes (OLEDs). We combined a 1D drift-diffusion model with a 3D master equation.
Our approach effectively combines the computational efficiency of a 1D drift-diffusion solver with the physical accuracy of a discrete 3D ME model, where excitonic long-range interactions for energy transfer can be taken into account.
We show that such a hybrid approach can efficiently describe the steady-state and transient behavior of typical OLEDs reported in the literature.
Optimize Hyperfluorescent and TADF OLEDs by Reducing Excitonic Loss Channels
We present a combined experimental/simulation analysis of a set of 4 OLEDs with 2 systematically varied guest dopants in the EML. A numerical electro-optical model is employed, demonstrating one consistent parameter set that describes both steady-state and AC characteristics of all devices. The model accounts for charge transport, trapping, polar layers, and excitonic loss processes. These are inducing an efficiency roll-off that can be correlated with the shape of the emission zone and the guest dopant concentrations. Furthermore, starting from the resulting parameter set, we show routes for optimized TADF OLDEs with a reduced roll-off.
HOW To optimize the CIE coordinates of a blue oled by fine tuning the cavity
In this tutorial, we are demonstrating how to use the optical module of Setfos in order to demonstrate how much the color point of a full OLED can be tuned for a given emitter spectrum. Moreover, we compare the efficiency of the color-optimized device with the one that is tuned for the highest outcoupling/radiance and analyze the consequent trade-off between color purity and efficiency.
The same analysis and optimization can be performed for other types of emitters such as quantum dots or perovskites. Despite the narrow emission spectra of these emitters, the optics of such QLEDs and PeLEDs is equal to the well-established OLEDs.
Analysis of TADF OLED degradation by combining advanced characterization and simulation
Despite the success of OLED displays in commercial products, there are still issues regarding the efficiency and lifetime of these devices. It is of utmost importance to better understand the device physics in general and the origins of degradation in these OLEDs.
In this blog post, we show you an example for which we used our tools Paios and Setfos to understand device limitations and analyze the degradation mechanisms in state-of-the-art sky blue TADF OLED devices.
EQE optimization For a Top-Emitting OLED
The external quantum efficiency (EQE) is the number of photons emitted by an OLED per number of injected charges. Photons are generated in the device emitting layer (EML), but most of the light is not escaping the device because of thee main loss mechanisms: Total Internal Reflection, Absorption Losses and Surface Plasmon Polaritons (SPPs). In this example, we are showing how to use Setfos to optimize the geometry of an OLED towards high light-outcoupling efficiency.