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/We want to provide researchers with as much value as we can. Sure we want you to use our software or choose our instruments but we also want these research tools to be part of your success story.
How do we do this?
We have a continuous program of research designed to test our tools so we know they deliver on promise. And like you, we submit that work for peer review.
We further develop our research tools as part of collaborative research projects so they remain cutting-edge.
We share our published work and that of our customers with as wide an audience as possible.
We also engage with the research community regularly basis both online and in-person.
And it’s our focus on customer engagement and how you can join the conversation that is the focus of our February newsletter:
— Research via Video - Check out our Channels on YouTube and bilibili —
— Join the Research Conversation on LinkedIn, Twitter, and more —
— Want to learn more about LEDs and Solar Cells? Check out our Blog. —
2022 Papers from our Customers
It’s week 9 of 2022 and the rate of publishing shows no sign of slowing down from last year. Our customers continue to produce impressive results. Here you can find few of them:
Homogeneous Grain Boundary Passivation in Wide-Bandgap Perovskite Films Enables Fabrication of Monolithic Perovskite/Organic Tandem Solar Cells with over 21% Efficiency.
Yue-Min Xie, Yong Cao et al.
Adv. Funct. Mater. 2022, 2112126.
Monolithic perovskite/organic tandem solar cells have attracted increasing attention due to their potential of being highly efficient while compatible with facile solution fabrication processes. This work has carefully optimized mixed halide wide-bandgap perovskite (MWP) films by introducing a small amount of formamidinium (FA+) cations into the basic composition of MA1.06PbI2Br(SCN)0.12, which provides an effective means to modulate the crystallization properties and phase stability of the films. At optimized conditions, the MA0.96FA0.1PbI2Br(SCN)0.12 forms high-quality films with grain boundaries homogeneously passivated by PbI2, leading to a reduction in defect states and an enhancement in phase stability, enabling the fabrication of perovskite solar cells with a power conversion efficiency(PCE) of 17.4%. By further integrating the MWP front cell with an organic BHJ (PM6:CH1007) rare cell composed of a non-fullerene acceptor with absorption extended to 950 nm, a tandem cell with PCE over 21% is achieved.
PAIOS was used to analyze these solar cells with Electrochemical Impedance Spectroscopy
Revealing the strain-associated physical mechanisms impacting the performance and stability of perovskite solar cells
Wei Meng, Christoph J. Brabec et al.
Joule, Volume 6, Issue 2, 2022
Identification and investigation of strain at buried interfaces in halide perovskite photovoltaics are crucial for directing research on the performance and stability of perovskite solar cells. The authors found a gradual shift in the bandgap of up to 60 meV over a perovskite layer thickness of 300 nm caused by interfacial strain. This graded bandgap is desired insofar as it relates to the aspect of device engineering. However, in parallel, the increased defect density causes charge recombination at the buried interface. These two effects compensate for each other, resulting in an overall performance improvement under standard 1 sun illumination. Nevertheless, the disadvantage of enhanced defect density is clearly observed at low-light intensities, where the device performance becomes dominated by charge recombination and ion migration. Moreover, the strained interfaces are proven to induce enhanced defect densities, causing significantly accelerated device degradation under illumination as well as in the dark.
Vacuum deposited WO3/Al/Al:Ag anode for efficient red organic light-emitting diodes
Kevin Sutanto, Shun-Wei Liu et al.
Organic Electronics, Volume 103, 2022,
Vacuum deposited multilayered electrode with ultra-smooth surface morphology and suitable work function for efficient electron or hole injection at the interface between the organic and metal layers is attracting more attention recently. Following the trend, a simplified structure of WO3/Al/Al:Ag anode with the sheet resistance of 1.93 Ω/sq, work function of ∼5.11 eV, and surface roughness of 0.72 nm was fabricated to develop a red organic light-emitting diode (OLED) with the external quantum efficiency (EQE) of ∼16.18% at 1000 cd m−2, which is much higher than that of a red OLED based on standard ITO electrode (EQE ∼ 12.32%). In addition, the red OLED with our proposed ITO-free anode exhibit a bright emission with a luminance of >10,000 cd m−2 at 5 V.
The optical device simulation, electroluminescence spectrum, optical mode simulation, and distribution were carried out using the advanced optics module of our simulation software Setfos. The electrical characterization, including impedance spectroscopy, capacitance-voltage (C–V) plot, and transient electroluminescence (TREL), were measured by Paios.
Impact of charge generation and extraction on photovoltaic performances of spin- and blade-as well as spray-coated organic solar cells,
Le Wang, Lintao Hou et al.
Organic Electronics, Volume 101, 2022,
The fullerene- and non-fullerene-based organic solar cells (OSCs), which are compatible with low-cost solution-coating technologies, have attracted widespread attention in recent years. In this work, the JSC difference between fullerene/non-fullerene OSCs by different coating techniques is systematically studied by analyzing the internal quantum efficiency and reconstructing the external quantum efficiency. Moreover, for both the fullerene and non-fullerene systems, the ratio of charge recombination over charge extraction in the blade-coated OSCs is very close to that in the spin-coated devices, whereas there is a clearly larger discrepancy between the spray-coated and the spin-coated ones. In terms of the ultimately achieved power conversion efficiencies, which is mainly related to the solid-state morphologies of active films by different coating techniques, the fullerene system presents better tolerance to fab-scale coating methods than that of the non-fullerene system. The J-V curves calculated by the drift-diffusion equations fit well with the actual J-V curves, verifying the correctness of the above analysis and the usefulness of our conclusions.
Can’t digest any more papers? How about a video or two?
Our YouTube channel is the place to discover our conference talks, learn from our software tutorials for Laoss and Setfos and find out more about our characterization tools like Phelos and Paios. We are adding more content all the time and we’re looking forward to dropping the first of our new video series Science Shorts with Dr. Antonio Cabas Vidani.
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Can’t access YouTube? We’re also on bilibili!
We appreciate that Youtube access is not universal. In order that we can serve as many of you as possible with useful content, we’ve also made our video content available via the Chinese video-sharing platform bilibili. And should you prefer to read or listen to them in Chinese, this is now available on many of the videos thanks to the translation work of our colleague Zijun Xiao.
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And for our Chinese followers our scientific blogs have all been translated and posted on the CSDN network:
Learn More about Solar Cells and LEDs
We know there are a lot of papers to read and not always a lot of time to read them. We created our blog to highlight some of the more useful research findings and techniques. These short articles are written by our team of researchers and we hope to provide answers to the more common search requests we see posted online. There is a broad range of topics covered from Photon Recycling in perovskite solar cells to how to determine the dipole orientation and emission zone in an OLED. You can read them all here.
Going to a Conference in March?
If you’d like to discuss what’s new with our research tools or attend one of our researcher’s oral presentations here’s where we’ll be in March:
NANOGE Spring Meeting 2022 (online)
#NSM22
Oral Presentations:
A Robust routine for reliable 1-D transient photoluminescence simulations
Dr. Antonio Cabas Vidani
Photon recycling and luminescent coupling in all-perovskite tandem solar cells assessed by full optoelectronic simulation
Dr. Urs Aeberhard
LOPEC Conference Printed Electronics
#LOPEC2022
Oral Presentation:
Quantifying upscaling losses in photovoltaic modules by employing FEM simulations
Dr. Sandra Jenatsch
When and where:
Wed 22nd - Fri 24th March 2022
Internationales Congress Center München, Germany
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We look forward to discussing research with you online very soon!
