Setfos 5.4 - Here's what's new
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Setfos has gone through many iterations over the last 16 years. The last update was a major one. Version 5.3 was a long 16 months of development work but worth it when we see the high caliber of research being realized. Now, we are thrilled to introduce you to Setfos 5.4.
What Can Setfos 5.4 Do?
We have assembled a slide deck to unveil all the new features. But for those who prefer a quick glance, we have also created a convenient bullet list below detailing our latest implementations. We are particularly excited about the current source boundary condition for electrical simulations. This enhancement to the drift-diffusion module offers versatility in sourcing current or voltage in a steady state and even allows to switch dynamically between the two driving schemes in transient simulations, which is key to optimizing OLEDs and photodetectors under real driving conditions.
The bundle of new features as well as the improved stability and accuracy brings about increased efficiency in your research process.
Latest Research Powered by Setfos
Of course, the ultimate goal of Setfos and our suite of tools is to empower transformative research. To that effect, we take great pleasure in sharing the latest research papers enabled by Setfos:
A touchless user interface based on a near-infrared-sensitive transparent optical imager
Takeshi Kamijo, Albert J. J. M. van Breemen, Xiao Ma, et al.
Nature Electronics 6, 451, (2023).
The researchers have developed a touchless user interface based on a visually transparent near-infrared-sensitive organic photodetector (OPD) array. The touchless interface can be used on top of a display, eliminating the need for physical contact.
The OPD array is designed with optical transparency in mind, using printed copper grids and patterned organic photodetector subpixels. The design optimization results in a high photodetectivity of 10^12 Jones at 850 nm and a visible-light transmittance of 70%.
How Fluxim’s Research Tools were used
Setfos
Numerical electro-optical simulations for the photogenerated J–V curves of the NIR-sensitive OPDs were performed with Setfos. The VLT of the parallel OPD subpixel array was calculated by the summation of the simulated optical transmittance for each component.
Laoss
2D FEM simulations for the surface potential and the current density distributions derived from the printed Cu grid structure for the NIR-sensitive OPDs were performed with Laoss. Laoss is our FEM-based software with 3 modules.
Determination of Mobile Ion Densities in Halide Perovskites via Low-Frequency Capacitance and Charge Extraction Techniques
Jonas Diekmann, Francisco Peña-Camargo, Martin Stolterfoht et al.
The Journal of Physical Chemistry Letters 14, 4200, (2023).
This article discusses the impact of mobile ions on perovskite photovoltaic devices and the challenges in accurately quantifying mobile ion densities. The study evaluates several experimental methodologies, including charge extraction by linearly increasing voltage (CELIV) and bias-assisted charge extraction (BACE), as well as frequency-dependent capacitance measurements. The findings show that CELIV underestimates ion density and is not suitable for accurate quantification. BACE, on the other hand, can accurately reproduce ion density as long as it is lower than the electrode charge. The study also demonstrates that low-frequency Mott-Schottky analysis can provide accurate ion density values for high excess ionic densities typical of perovskites.
Setfos was used in this work to simulate the impact of mobile ions on the performance of perovskite solar cells. The parameters related to mobile ions were implemented into the drift-diffusion module. This allowed the researchers to include mobile ions in their simulations and recreate the observed JV-hysteresis in the cells over a wide range of scan speeds. The simulations also verified that losses in the performance characteristics of JSC, VOC, and FF could be recreated.
Open-circuit and short-circuit loss management in wide-gap perovskite p-i-n solar cells
Pietro Caprioglio, Joel A. Smith, Robert D. J. Oliver, et al.
Nature Communications 14, 932, (2023).
Wide-gap perovskites suffer from Voc- and Jsc-deficit, but what's the reason, and how to solve it?
Researchers from the groups of professors Henry J. Snaith and Martin Stolterfoht demonstrated with drift-diffusion simulation that a poor band-alignment with the electron transporting layer causes the Voc-deficit, while mobile ions obstacle the charge extraction causing Jsc losses. The voltage losses were solved by inducing the growth of a low-dimensional perovskite with a surface treatment based on guanidinium bromide (GuaBr) or imidazolium bromide (ImBr). To improve the charge extraction, they modified the hole-transporting layer by applying an ionic interlayer (TEA-TFSI) or replaced it with a self-assembled monolayer (SAM).
The team used Setfos to reveal that the hole-transporting layers enhance the charge extraction by inducing a stronger electric field at the interface with the perovskite.
Discover more research powered by Setfos
Would you like to get hands-on with Setfos?
If you have not yet had the opportunity to experience Setfos, we would love to show you its capabilities firsthand at upcoming conferences over the next few months. If you will be attending these events, do let us know, and we would be delighted to arrange a personal demonstration tailored just for you.
SPIE Optics + Photonics 2023
Fluxim´s Dr. Antonio Cabas Vidani is attending the SPIE Optics + Photonics conference. On August 20, he will discuss the degradation of thermally activated delayed fluorescent (TADF) OLEDs, highlighting the formation of trap states and their impact on device performance. On August 24, his talk will focus on the potential of high-bandgap perovskites in tandem solar cell technologies, addressing the performance decay due to a drop in current.
If you would like to meet Antonio at SPIE and discuss how Setfos can help in your research follow the link below.
We will also be attending the following conferences. Contact us if you would like to see our research tools in person.
IMID 2023 The 23rd International Meeting on Information Display
EU PVSEC 2023 Lisbon 40th Anniversary
Setfos 5.4 Slide Deck
SETFOS 5.4 Release Notes
Drift-Diffusion Module
Option to source current (alternatively to voltage)
Support for transient signals with mixed current/voltage source
Impact ionization model to simulate reverse-bias breakdown
Extended photodetector simulation options: Added AC transfer functions (responsitivity) to IMPS and IMVS results
MELS simulations extended to output VMELS (Voltage Modulated EL Spectroscopy) and CMELS (Current Modulated EL Spectroscopy)
Support for transient temperature simulations in combination with EGDM/ECDM mobility models
Option to link the generation rate to s- or p-polarized components of the absorption rate
Possibility to stop transient DD simulations and keep already computed data
Export timestep for transient simulations is now sweepable
Support for IMPS and IMVS simulations with optical coupling via excitons
Solvers made more robust for DD simulations with low charge carrier densities
Absorption
Option to sweep the data column index of the illumination spectrum file
Computation of solar-cell EQE in the AC domain (small-signal EQE)
Reduced ambiguity in Shockley-Queisser-analysis
"Amount of Diffuse Light" is now sweepable
Emission
Option to sweep the data column index of the emitter spectrum file
Post-process angle-integrated emission quantities for arbitrary emission-angle-sweeps
Added plot of blue index vs. CIEy
Added optical profile plots for simulations with a sweep
Allow emission coupling to AC recombination
Advanced optics
Allow to set and sweep user-defined mean-free-path for Mie scattering
Automatic adaption of the numerical sampling for statistical microtextures (ray tracer)
Graphical user interface (GUI)
Revised output settings in GUI
Display 3D raytracing results on macOS
Various layout improvements
General
Support for sweeps with random parameter sampling (linear and log-scale)
Possibility to disable optimization target groups
Removed obsolete HTML report feature
Setfos 5.4 is ready to be downloaded now.
To get the newest version, start Setfos and click on Help > Check for new version.
