Here's what we have got to share this month:

• 💻 New Product Releases: Setfos 5.2

• 🥼 Latest LED & Solar Cell Research from Fluxim Customers.

• 📺 Scientific Tutorial Videos

• 🐼 我们的宣传册现在有了中文版本

💻 New Product Releases: Setfos 5.2

Setfos is our flagship simulation software.

It is the research tool that launched Fluxim over 15 years ago, and it has remained at the cutting edge of research needs ever since. What started as an enabling tool for modeling light-outcoupling in OLEDs is now a comprehensive design and optimization tool for developing LEDs and solar cells made of organic semiconductors, perovskites, and quantum dots.

We have just released the new version of our software, i.e. Setfos 5.2. For all our customers and for those of you who are curious about device simulation, here are the new features and updates:

WHAT’S NEW IN SETFOS

• 3D Master-Equation Model for Excitons

Combine Drift-Diffusion simulations with the novel 3D Master-Equation model for excitons to study (in both, steady-state and transient regimes):

• non-local exciton energy transfer (Förster, Dexter)

• energy transfer across layer interfaces

• excitons in material blends, e.g. host-guest systems

• correlated and uncorrelated energetic disorder

The release of the Master Equation module is an exciting addition to Setfos, and we want as many customers to benefit from it as possible. So during the first year, we're making it free of charge for all Drift-Diffusion license holders.  

To gain access, update your license by clicking on the Check-Online button in your Fluxim License Manager.

• Position- and Time-dependent Sun-Spectrum

Compute the clear sky sun-spectrum for a given geographic location and time and optimize your solar cell for realistic conditions

• Sweeps over time to compute the total energy yield

Run time-sweeps and consider the location-specific sun spectrum to compute the accumulated energy from your solar cell

• SRH Recombination at Interfaces

Include the effect of Shockley-Read-Hall recombination at interfaces to investigate the electro-optical performance of your perovskite solar cell

• Emission spectrum from nk dispersion

• Compute the intrinsic luminescence spectrum directly from the nk-dispersion via a detailed balance relationship

• Copy and Paste of Simulations

Manage your simulations more comfortably with the new Copy + Paste feature

• Parallel Parameter sweeps

Sweep multiple parameters in parallel. For example, increase the thickness of one layer while shrinking another one

• Change Order of Stacked Diagrams

Customize the plotting order and color of stacked diagrams

• Couple Charge Transport with Mode Analysis

Couple Drift-Diffusion with an optical Mode-Analysis and break-down the exciton decay, transfer, and quenching rates into individual radiative and non-radiative channels

• Extended Exciton Quenching

Investigate quenching processes between different exciton types, e.g. singlet-triplet annihilation

• Stacked Exciton Diagrams

Investigate exciton gain and loss channels with the new stacked diagrams

Learn how Setfos can enable your work.

🥼 Latest LED & Solar Cell Research

Impressive results continue to be published by our customers and researchers at Fluxim. Congratulations to all authors, and thank you for trusting in our tools.

Making Room for Growing Oriented FASnI3 with Large Grains via Cold Precursor Solution

Danyu Cui, Xiao Liu, Tianhao Wu, Liyuan Han et al.
Adv. Funct. Mater. (2021), 2100931, 1

doi.org/10.1002/adfm.202100931

Another great advancement for the development of lead-free perovskite solar cells.

Despite a significant research effort in recent years, the device efficiency and lifetime of Tin halide perovskite solar cells still lag behind their counterparts fabricated from lead-containing materials.

Researchers of the Shanghai Jiao Tong University presented a simple, but powerful method, to improve the PCE of lead-free solar cells up to 12.11%. By cooling the precursor solution to 0 °C before spin-coating, they achieve a smooth, pin-hole-free active layer with increased grain sizes up to 1 um. The solar cells fabricated with this perovskite film are more efficient and more stable when compared with the devices processed at room temperature.

Paios was used to determine the charge carrier lifetime and charge extraction efficiency in the device by using TPV and TPC. The 3-times longer charge carrier lifetime in the 0°C device confirmed the beneficial effect of larger grain sizes on the recombination mechanisms with a significant increase of the Voc.

Watch how Paios is used to rapidly characterize solar cells and LEDs.

• Current-Voltage-Luminance

• Transient Photocurrent

• Transient Photovoltage

• Transient Electroluminescence

• Charge Extraction

• Dark Injection Transients

• Dark/Photo-CELIV

• DLTS

• Impedance Spectroscopy

• Capacitance-Voltage

• IMPS/IMVS

• MELS

• Emission Spectrum

• User-Defined Signals

Parameterization of Metallic Grids on Transparent Conductive Electrodes for the Scaling of Organic Solar Cells

G. Burwell, N. Burridge, E. Bond, W. Li, P. Meredith, and A. Armin

Adv. Electron. Mater. (2021), 2100192, 1

doi/10.1002/aelm.202100192

The efficiency of a large-area solar cell is limited by the sheet resistance of the conductive oxides that are available. The use of a metallic grid in combination with transparent oxide is gaining interest as a solution to support the upscaling of solar cells.

Researchers at Swansea University used our simulation software Laoss to define the design parameters for an optimal large-area organic solar cell.

They carried on simulation to estimate also the figures of merit for realistic large-area OPVs. By combining simulation and experimental work they demonstrated that the scalability of devices with metallic grids improves significantly when grids are implemented at micrometer scales. These results indicate that metallic grids can be designed to develop large-area solution-processed solar cells with currently available fabrication techniques.

LAOSS - Software to Design and Optimize Large Area Semiconductor Devices

Tin-Lead Perovskite Fabricated via Ethylenediamine Interlayer Guides to the Solar Cell Efficiency of 21.74%

Gaurav Kapil, Shuzi Hayase et al.

Adv. Energy Mater. (2021),, 11, 2101069

doi.org/10.1002/aenm.202101069

Tin-lead (Sn-Pb) perovskites could have an ideal bandgap for photovoltaics. However, solar cells based on Sn-Pb perovskites show lower power conversion efficiency (PCE) than Pb pero-PVs, mainly because of the lower open-circuit voltage (Voc).

Recently, researchers at the University of Tokyo fabricated the Sn-Pb perovskite solar cell with the highest recorded PCE so far (PCE = 21.74%). They used chemical passivation with ethylenediamine (EDA) to overcome several of the limitations of the mixed perovskite absorber, such as instability due to oxidation and high defect density. The treatment resulted in an increase of the Voc by 100 mV compared to the untreated devices.

The team used Paios to carry on impedance analyses under dark at the short circuit. Paios is designed specifically for the analysis of perovskite solar cells and allowed them to determine the carrier density in their devices.

You can find more research papers on our website: /publications-overview

📺 Scientific Tutorial Videos

Over the years we have recorded hours of video content from various conferences and workshops. Some of it has been openly available via our Youtube channel and some of it has been locked away in the vaults of our servers. There are some great insights and knowledge to be gained in this material. Therefore, we have gathered the most recent and useful recordings and conveniently hosted them on one page. If you want to learn how to quantify electro-optical cross-talk in white OLEDs or see how quickly one can design and simulate an organic solar cell with Setfos then you may want to check out our scientific videos page:

You can find our Tutorial Videos here: /videos

🐼 我们的宣传册现在有了中文版本

Fluxim AG is a Swiss company, but our team is truly multinational and multi-lingual. Spend a day in our office, and you will be sure to hear at least four languages spoken regularly. To that end, we wanted to extend our reach from a linguistic perspective and make our product literature more accessible. Thanks to our new colleague Zijun Xiao, our product brochures are now available in simple Chinese. You can download them here:

Fluxim是一家瑞士公司，但我们的团队是真正的多国和多语种。 在我们的办公室呆上一天（当然是在新冠消除之后），你肯定会经常听到至少有4种语言。为此，我们希望从语言的角度扩大我们的影响力，使我们的产品和文献更容易被接受。感谢我们的同事肖子峻，我们已经将我们的产品手册翻译成简单的中文，你可以在上面下载。

Litos-Lite 太阳能电池并联电流电压和稳定性测试平台

Paios 和太阳能电池的电光性能表征

Phelos 角度相关发光光谱仪

Setfos 太阳能电池及OLED模拟软件

Laoss 大面积LED及太阳能电池板设计优化软件

Litos 先进的太阳能电池及LED寿命稳定性测试系统

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