June Spotlight: Research Webinars, Conference Recaps, and New Team Members
As we move into summer, we are excited to share our customers’ latest scientific highlights and recap of recent events at Fluxim. May was full of positive events here at Fluxim, our research webinars are proving very popular with hundreds of you attending and we have made several new strategic hires to strengthen our team. We also had a strong presence at the E-MRS Spring Meeting 2024 and ICDT, China, where our latest instrument Litos Lite garnered much attention. Looking ahead, we are getting ready for several more conferences over the summer and of course SimOEP 24 is only a few months away. Dive into this edition to stay updated on these exciting developments and more from the world of OLED and solar cell research.
Latest Research from Our Customers
New Research Webinar (plus watch the last one)
New Research Blog: Aging & Characterization of High-Bandgap Solar Cells
We´ve Grown - Meet the New Fluximers
Latest Research From Our Customers
Alleviating nanostructural phase impurities enhances the optoelectronic properties, device performance and stability of cesium-formamidinium metal–halide perovskites
Othman, M., Jeangros, Q., Jacobs, D. A., Futscher, M. H., Zeiske, S., Armin, A., Jaffrès, A., Kuba, A. G., Chernyshov, D., Jenatsch, S., Züfle, S., Ruhstaller, B., Tabean, S., Wirtz, T., Eswara, S., Zhao, J., Savenije, T. J., Ballif, C., Wolff, C., & Hessler-Wyser, A. (2024).
Energy & Environmental Science. The Royal Society of Chemistry.
85% PCE maintained after 1,400 hours
🎉 Congratulations to Mostafa Othman, Ph.D. student at the EPFL PV-lab, on his paper in Energy & Environmental Science. Royal Society of Chemistry. Mostafa's paper focuses on enhancing the optoelectronic properties, performance, and stability of cesium-formamidinium metal–halide perovskites. By fine-tuning the Cs content to Cs0.15FA0.85PbI3, his study achieved minimized stacking faults, improved photoconductivity, and significantly increased device stability. The encapsulated devices retained 85% of their initial power conversion efficiency over 1400 hours of continuous illumination at 35°C.
Fluxim is happy to have supported Mostafa during his Ph.D. and thrilled to see our tools, Paios and Litos, play a key role in this research.
Paios was used for advanced impedance spectroscopy and potentiostatic polarization measurements, revealing insights into the electronic and ionic conductivity of the perovskite films. Accelerated ageing measurements for 40 h were performed with the advanced stability platform Litos by Fluxim AG, Switzerland. The samples were kept at 85 °C, illuminated by white LEDs at 1 sun-equivalent light intensity, and 12 pixels were kept at MPP.
A Boron, Nitrogen, and Oxygen Doped π-Extended Helical Pure Blue Multiresonant Thermally Activated Delayed Fluorescent Emitter for Organic Light Emitting Diodes That Shows Fast kRISC Without the Use of Heavy Atoms
R. W. Weerasinghe, S. Madayanad Suresh, D. Hall, T. Matulaitis, A. M. Z. Slawin, S. Warriner, Y.-T. Lee, C.-Y. Chan, Y. Tsuchiya, E. Zysman-Colman, C. Adachi,
Atoms. Adv. Mater. 2024, 2402289.
Blue OLED Emitter Achieves High Efficiency & BT.2020 Compliance Without Heavy Metals
Researchers at Kyushu University and the University of St. Andrews have developed a pioneering blue OLED emitter, f-DOABNA, that aligns with the BT.2020 color standard and achieves high efficiency without the use of heavy metals:
Key points
✅Innovative Material: The team developed a boron, nitrogen, and oxygen-doped π-extended helical emitter, showcasing a pure blue, narrowband emission — essential for advanced display technologies.
✅Enhanced Efficiency: With exceptionally fast reverse intersystem crossing (kRISC) and high photoluminescence quantum yield, the emitter reaches nearly 20% external quantum efficiency.
✅Eco-Friendly Approach: The avoidance of heavy metals in the emitter formulation makes this technology a greener alternative for the OLED industry.
Utilization of SETFOS
Fluxim's SETFOS software played a crucial role in optimizing light outcoupling efficiency. By analyzing the orientation of transition dipole moments within the OLED films, SETFOS helped enhance the device's performance, demonstrating the power of our simulation tools in cutting-edge research.
This study not only advances the field of material science but also aligns with global sustainability goals, positioning it as a fundamental breakthrough for future developments in organic electronics. Congratulations to the research team and first author Rangani Wathsala Weerasinghe.
Ion-induced field screening as a dominant factor in perovskite solar cell operational stability.
Thiesbrummel, J., Shah, S., Gutierrez-Partida, E. et al. Nat Energy (2024).
DOI: https://doi.org/10.1038/s41560-024-01487-w
Exploring Ion Dynamics: A Leap Towards Stable Perovskite Solar Cells (PSCs)
PSCs are lauded for their high efficiency but struggle with stability under operational conditions. A recent study in Nature Energy by Jarla Thiesbrummel, Sahil Shah, Emilio Gutierrez-Partida et al. focuses on the crucial influence of mobile ions on this issue.
The research reveals that the intrinsic stability of PSCs is primarily compromised by mobile ion-induced field screening, rather than by the commonly suspected factors such as material degradation or mechanical stress. This phenomenon leads to a significant decrease in the steady-state efficiency of the solar cells, mainly due to a marked reduction in current density. Interestingly, the study points out that while the efficiency drops at slow scan speeds, it remains relatively unaffected at high scan speeds where ions are immobilized, underscoring the central role of ion dynamics in affecting PSC performance.
This breakthrough study not only deepens our understanding of PSC degradation mechanisms but also opens up avenues for improving these cells' long-term stability by addressing ion-induced field screening.
How Setfos was used
Setfos was used to simulate the impact of increasing mobile ion concentration on perovskite solar cell (PSC) stability. The simulations tested a hypothesis that aging increases mobile ion concentration, leading to enhanced ionic losses. Results demonstrated significant screening of the internal electric field in the absorber layer by mobile ions. This screening effect causes a reduction in charge extraction efficiency due to the flattening of energy bands. Setfos simulations quantitatively showed how this mechanism leads to decreased steady-state efficiency, mainly by reducing current density. The use of Setfos provided clear insights into the detrimental effects of mobile ion movement on PSC operational efficiency and played an important role in isolating the specific effects of mobile ion-induced losses on PSC stability.
Congratulations to Jarla Thiesbrummel, Sahil Shah, Emilio Gutierrez-Partida, and their colleagues 👇 for their substantial contribution to advancing perovskite solar cell technology.
Research Webinar 5:
ENHANCING PEROVSKITE SOLAR CELLS: SPRAY DEPOSITION & ADVANCED MATERIAL CHARACTERIZATIONS
Our invited guest for the 5th research webinar is Justin Chen, Ph.D Candidate at the Dauskardt Group, Stanford University. Justin will be presenting the following topic:
Open-Air, Spray Deposition of ETLs for Inverted Architecture Perovskite Solar Cells
Date & Time: Tue, June 11th, 3 PM - 4 PM (CEST)
Joining him will be Fluxim´s Dr. Davide Moia who will be presenting a talk on:
Mixed ionic-electronic conduction in perovskite solar cells: implications for small signal analysis
This webinar, hosted by Dr. Daniele Braga (Fluxim), is a must attend for researchers working on tandem solar cells.
We look forward to seeing you there!
Missed the last webinar? Watch it here:
New Research Blog: Aging & Characterization of High-Bandgap Solar Cells
In this research blog, we explore the aging and characterization of high-bandgap solar cells, focusing on perovskite compositions. Our findings highlight the impact of temperature on the degradation of solar cells and the importance of comprehensive characterizations beyond simple stability tests. Using advanced techniques, we identified that increased mobile ion density significantly affects cell performance over time. Discover how our Litos platform aids in these crucial analyses.
Read the full article here https://www.fluxim.com/aging-and-characterization-of-high-bandgap-solar-cells
We Have Grown - Meet the New Fluximers
Keeping our simulation softwares and instruments at the cutting edge requires a team of highly skilled people, thanks to the high demand our research tools are attracting we’ve needed to grow that team. We´d like to introduce you to our new Fluximers:
Dr. Sarah Reeb
Technical Sales Engineer
Sarah has a robust background in battery and fuel cell technology and a Ph.D in Inorganic Chemistry, she brings with her a wealth of expertise and experience from her previous roles, notably at Math2Market GmbH where she focused on client relationships, project management, and technical advancements in battery and fuel cell technologies. Sarah will boost our technical sales at Fluxim AG, crucial for maintaining our leadership in R&D tools for emerging LED, solar cell and battery technologies.
Adrian Langenbach
Software Engineer
Adrian joins our software development team with a strong academic background from ETH Zürich, he holds both a Master of Science and a Bachelor of Science in Physics. Adrian's professional journey includes significant experience at Polariton Technologies Ltd., where he served as an R&D Engineer, focusing on reliability testing and test automation.
Summer Conferences - Discuss Your Research with Us.
TandemPV Internaional Workshop
Join us at the TandemPV 2024, from June 25 - 27, to explore the latest in tandem solar cell technology. This popular event features sessions on hybrid silicon perovskite tandems, large area device techniques, and new reliability protocols. Fluxim is an official sponsor of the Tandem PV International Workshop.
Fluxim´s Contribution
Dr. Urs Aeberhard will present an invited talk on:
Modeling Reverse-Bias Breakdown in All-Perovskite Tandem Modules under Partial Shading Conditions
June 27th, 15:00 - 16:30 CEST.
1st INDOOR PHOTOVOLTAICS CONFERENCE (IPVC-1)
The 1st Indoor Photovoltaics Conference (IPVC-1) is set to take place at Tampere University, Finland, from July 4-5, 2024.
This inaugural event aims to gather the international academic and industrial community focusing on indoor photovoltaics, covering aspects from material development to system integration.
IPVC offers an ideal platform for networking, collaboration, and learning about the latest advancements in indoor photovoltaic technologies, such as organic, perovskite, and dye-sensitized solar cells.
Fluxim will be adding to the proceedings with an invited talk by Dr. Simon Züfle who will be presenting:
Advanced optoelectronic characterization of novel solar cells for indoor photovoltaics
Session 4, Friday 5th July 10.00am
24th International Conference On Solid State Ionics (SSi24)
SSi24 will take place at the QEii Centre, London between 15 - 19 July, 2024 and will cover fundamental research, materials discovery, and processing for electrochemical devices critical for the green energy transition. Topics include advanced characterization techniques and applications in energy storage and electronics.
SSI Highlights:
Tutorials for students and postdocs on July 14
Plenary and keynote sessions with renowned experts
Poster prizes and opportunities for early career researcher
Fluxim´s Contribution
Dr. Davide Moia will be presenting the following talk at SSi24:
Defect chemical and equivalent circuit models for photo-active mixed ionic-electronic conducting devices
Date: Thursday July 18, 2024
Session: 5D1 Memristors/ Materials for Neuromorphic Computing
Time: 16.35 Computing-O2
Final Call for Abstracts - SimOEP 2024
SimOEP is back. The 9th International Conference on Simulation of Organic Electronics and Photovoltaics (SimOEP) is set for 2nd - 4th September 2024 in Winterthur, Switzerland.
This conference unites modelling experts and device physicists to discuss advances in organic and perovskite solar cells and OLEDs, covering a wide range of topics from charge and heat transport to light propagation.
Call for Abstracts - Deadline Extended
A call for abstracts is open until 14th June with acceptance notifications by 21st June 2024.
A speaking time of 15 minutes for the presentation including Q&A is scheduled for contributed talks.
SimOEP is a prime opportunity for scholars to contribute to the evolving field of organic and perovskite-based electronics.