What do Physicists do at Christmas?
/It’s nearly time to take a break for a few days, but before we go we want to celebrate our collective achievements in 2022.
Our customers have had another successful year in terms of publications. For the third year in a row, over 100 papers have been published using our tools. 👏 There have been some great results published and we’re happy to see that our two major fields of focus, PV and LED research, remain at the cutting edge of R&D. Congratulations to everyone involved, and thank you to all our customers for your trust in our products. If you missed the most recent papers from December then take a look here.
Of course, the end of the year also means Christmas time for many and hopefully some festive fun for all. With this in mind, we've created a special video with some well-known faces. Watch the “The Physicists Christmas Concert” here.
Plus, there is a sneak peek of what’s coming in 2023.
Happy holidays and we look forward to working with you all next year. As we say in Switzerland at Christmas time: “Händ schöni Wienachte und än guäte Rutsch ins Neue Jaar”
Can you name these musical Physicists? #justforfun
Scientists aren’t all work and no play and many have extra talents outside of science. For instance, we have many accomplished musicians h and singers here at Fluxim but getting them together to perform is something we’ve yet to achieve (maybe next year).
So we’ve recruited some well-known faces to boost your Christmas spirit.
Sit back and enjoy the“Physicists Christmas Concert” and if you recognize them let us know in the comments section at the bottom of the page.
New Research Papers - December 2022
Revealing Photodegradation Pathways of Organic Solar Cells by Spectrally Resolved Accelerated Lifetime Analysis
Weitz, P., Le Corre, V. M., Du, X., Forberich, K., Deibel, C., Brabec, C. J., Heumüller, T
Adv. Energy Mater. 2022, 2202564.
Read the full paper here: https://doi.org/10.1002/aenm.202202564
A method for organic solar cell (OSC) stability testing is presented. This aims to provide more unique insight into the causes of degradation patterns of OSCs. We used monochromatic light at high irradiation to accelerate isolated degradation mechanisms while monitoring the device with a series of in-situ steady-state and transient electrical measurements.
The experimental results are accompanied by drift-diffusion simulations to localize degradation pathways in PM6:Y6-based OSCs. The experiments reveal a degradation mechanism that causes an increased trap-state density inside the PM6:Y6 layer.
The transient simulations suggest that these states are formed at or around the interface between the PM6:Y6 and the electron transport layer. Furthermore, the surprisingly dominant impact of the illuminating wavelength on the degradation pattern is evidenced. Lastly, the degradation rate of the devices scales linearly with light intensity, making high-intensity and spectrally selective degradation the most promising way to accelerate stability testing for the faster development of stable OSCs.
Importance of structural hinderance in performance–stability equilibrium of organic photovoltaics
Baobing Fan, Wei Gao, Xuanhao Wu, Xinxin Xia, Yue Wu, Francis R. Lin, Qunping Fan, Xinhui Lu, Wen Jung Li, Wei Ma & Alex K.-Y. Jen
Nature Communications, 13, 5946 (2022)
Read the full paper here: https://www.nature.com/articles/s41467-022-33754-3
Organic Solar Cells (OSCs) with PCE of 18.3%, which is among the highest reported for nonhalogenated solvent-processed OPV. Most importantly, this is a great example of how the geometry of the acceptor molecule determines the efficiency and stability of non-fullerene OSCs. Larger and twisted side group => higher performance and stability.
The group of Alex K.-Y. Jen compared the impact of the geometrical hindrance of non-fullerene acceptors with various side groups in xylene-processed organic solar cells. They concluded that planar acceptors (like BTP-Br) have poor miscibility with the donor molecules, causing demixing during aging experiments, which correlated with a decrease in Jsc and increased charge recombination. On the other hand, twisted acceptors (like BTP-TBr) have better miscibility with the donor, hence longer stability during thermal aging. After 800h of aging at RT, solar cells with BTP-TBr show degradation of 5%, while solar cells based on BTP-Br lose up to 15% of their initial efficiency.
Delay-time photo-CELIV was performed with the all-in-one platform Paios the charge carrier density and the recombination coefficient.
Correlation between optimized thicknesses of capping layer and thin metal electrode for efficient top-emitting blue organic light-emitting diodes
Cho, H., Joo, C. W., Kwon, B.-H., Kang, C., Choi, S., and Sin, J. W.,
-Wiley ETRI Journal (2022), 1– 9.
Read the full paper here: doi.org/10.4218/etrij.2022-0236
In this study, the properties of top-emitting blue OLEDs were optimized by adjusting the thicknesses of the thin metal layer and capping layer (CPL). Deep blue emission was achieved in an OLED with a second cavity length, even when the transmittance of the thin metal layer was high.
The thin metal film thickness ranges applicable to OLEDs with a second microcavity structure are wide. Instead, the thickness of the thin metal layer determines the optimized thickness of the CPL for high efficiency.
A thinner metal layer means that higher efficiency can be obtained in OLED devices with a second microcavity structure. In addition, OLEDs with a thinner metal layer showed less color change as a function of the viewing angle.
Setfos was used to perform the optical simulations and to optimize the OLED stack design.
Incredible Customer Review 😉
A Volatile Solid Additive Enables Oligothiophene All-Small Molecule Organic Solar Cells with Excellent Commercial Viability
Hu, D., Tang, H., Karuthedath, S., Chen, Q., Chen, S., Khan, J. I., Liu, H., Yang, Q., Gorenflot, J., Petoukhoff, C. E., Duan, T., Lu, X., Laquai, F., Lu, S.,
Adv. Funct. Mater. 2022, 2211873.
Read the full paper here: doi.org/10.1002/adfm.202211873
The commercial viability of all-small-molecule (ASM) organic solar cells (OSCs) requires high efficiency, long-term stability, and low-cost production. However, satisfying all these factors at the same time remains highly challenging.
Herein, a volatile solid additive, namely, 1,8-dichloronaphthalene (DCN) is demonstrated to simultaneously enhance the power conversion efficiency (PCE) and the storage, thermal as well as photo stabilities of oligothiophene ASM-OSCs with concise and low-cost syntheses.
The improved PCEs are mainly due to the DCN-induced morphology control with improved exciton dissociation and reduced non-geminate recombination. The volatile-solid-additive strategy can be a simple yet effective method of delivering highly efficient and stable oligothiophene ASM-OSCs with excellent commercial viability.
The 1D numerical drift-diffusion module of Setfos was used to simulate the O-ASM-OSCs device J–V characteristics.
Find out who else published this month here >
More customer reviews 🎄
What’s coming in 2023
Setfos users be ready! Version 5.3 is in final testing and should be available to use early next year.
What can you expect from Setfos 5.3?
A completely new Drift-Diffusion Solver with several new options
The Stefos Absorption module will be able to account for the impact of cloud cover in the sun spectrum calculation.
Support for new file formats
GUI improvements
We will be communicating the full update in the next few weeks.
January Conferences
IPEROP23 PEROVSKITE AND ORGANIC PHOTOVOLTAICS AND OPTOELECTRONICS
The Asia-Pacific International Conference on Perovskite, Organic Photovoltaics, and Optoelectronics is to be held in Kobe, Japan from the 22nd to the 24th of January 2023.
The main topics of this conference are related to material preparation, modeling, and fabrication of hybrid and organic photovoltaic cells, including dye-sensitized solar cells, organic thin film solar cells, quantum dot solar cells, and solar cells.
Fluxim’s Sandra Jenastch and Antonio Cabas Vidani have been invited to present the following talks:
Ageing of high-bandgap perovskite for all thin-film tandem flexible solar cell devices
Dr. Antonio Cabas Vidani, 16:00 - 16:15, Mon Jan 23 , 2023
Session 1C2-O2
Analysis and Quantification of Ionic Charge Carriers in Perovskite Solar Cells
Dr. Sandra, Jenatsch 15:45 - 16:00 Tue Jan 24, 2023
Session 2C2-O2
SPIE PHOTONICS WEST 2023
SPIE Photonics West, The Moscone Center SAN FRANCISCO, CALIFORNIA, USA
Saturday, January 28, - Thursday, February 2, 2023
SPIE Photonics West is the world’s leading conference on photonics and a great conference to share research across biomedical optics, biophotonics, industrial lasers, optoelectronics, microfabrication, MOEMS-MEMS, displays, quantum technologies, including quantum 2.0, and other similar topics with a focused, engaged audience.
Fluxim’s Urs Aeberhard will be presenting the following talk:
Advanced simulation of perovskite-based tandem solar cells (Invited Paper)
Dr. Urs Aeberhard
30 January 2023 • 2:50 PM - 3:20 PM PST Session 12416-7
