Break-out Sessions
SESSION #1: Technology Transfer at HZB | HySPRINT and PVcomB | Jan Elmiger
Technologytransfer (TT) allows HZB to fulfil its duty to make the results of its work available to the public. The transfer of knowledge and technological know-how in line with the needs of the economy is a particular concern of TT. This should initiate innovations which make possible the development of new marketable products and procedures and in turn give suggestions for further, possibly joint, R&D projects.
For the promotion of TT in HZB it is essential to provide a supporting tool for TT collaborations and to recognise the accomplishments of the department as well as individual employees.
The different channels of TT to transfer the know-how into application together with industrial partners will be discussed.
Dr. Jan Elmiger is working for more than 20 years for the Technologytransfer of the HZB.
SESSION #2: Industrialization of Silicon/Pero & An Opportunity to go flexible with CIGSe/Pero | Steve Albrecht | Christian Kaufmann | Bernd Stannowski
The biggest advantage of thin film photovoltaics is the fact that they can be made light weight and flexible. This potentially increases the applicability of PV in areas such as VIPV, BIPV (e.g. on statically less stable, industrial roofing) and for highly demanding applications, e.g. in space. Often the energy demand is extremely high and available areas for such PV applications are limited. One reason in the past for flexible thin film technologies to not have achieve full visibility is, that often this need of a high power output/area demand could not be met satisfactorily. A flexible high efficiency tandem technology could therefore open new, attractive markets, if – of course – the required technological challenges are met.
Christian A. Kaufmann heads the research group @PVcomB, developing the CIGS thin film bottom devices for the HZB’s in-house thin film tandem technology. In the past his group has been actively working on flexible CIGSe devices for space applications.
SESSION #3: Slot-die-coating in the HySPRINT Innovation Lab: recent advances and future plans | Janardan Dagar
SESSION #4: Inkjet-printed applications - PV, LEDs and Integrated Devices | Florian Mathies, Felix Hermerschmidt
Inkjet-printing has evolved into a reliable, versatile and cost-effective industrial production technology in many areas from graphics to printed electronic applications. In combination with so-called metal halide perovskites, inkjet printing has raised high expectations for a cost-effective and versatile production technology for photovoltaic and lighting applications, as the printing process is scalable to print large areas. Such functional electronic inks have also been successfully used to realize the conducting structures that feature in printed circuits, RFID applications, logic systems and electrodes in optoelectronics, leading to examples of high throughput roll-to-roll fabrication of such devices. In addition to this, inkjet printing is a suitable technique for highly accurate additive and subtractive processes, such as combinatorial printing or module structuring which go beyond the usage in the area of photovoltaics.
Florian Mathies is post-doctoral researcher at HZB, leading the activities of inkjet-printed perovskite optoelectronic devices with the focus of understanding the formation kinetics from the ink to the printed layer, and working on the upscaling of such layers.
Felix Hermerschmidt is post-doctoral researcher in the Hybrid Devices group at Humboldt-Universität zu Berlin, leading the activities of formulation, processing and characterisation of functional materials in hybrid optoelectronic devices as well as in printed electronics.
Within the HySPRINT InnovationLab, both are collaborating in the JointLab GEN_FAB between HZB and Humboldt-Universität zu Berlin.
SESSION #5: Analytical capabilities of the Energy Material In-situ Laboratory Berlin - EMIL | Johannes Frisch, Regan Wilks
At the Energy Material In-situ Laboratory Berlin (EMIL), HZB bridges high-end materials synthesis and advanced characterization techniques.
Two synchrotron insertion devices in series feed the hard and soft branches of the EMIL beamline, which converge on a photoemission and fluorescence spectroscopy endstation in the lab. This arrangement uses three monochromators to provide high intensity photons across a continuous, tuneable range from 80 eV to over 10 keV, spanning the extreme ultraviolet to the hard x-ray regime.
An ultrahigh vacuum (UHV) backbone transfers and distributes samples automatically between synthesis, treatment, and characterization chambers. In addition to the attached synchrotron endstation, a separate surface science analysis chamber allows materials to be characterized by photoemission using standard laboratory x-ray and UV sources as well as with highly specialized instruments for inverse photoemission and constant-final-state yield spectroscopies. A dry-N2 glove box connected to the backbone via load lock allows sensitive samples to easily be introduced and removed in an inert-gas atmosphere. For extremely environment-sensitive materials, an attachment point for vacuum ‘suitcases’ or roll-up synthesis chambers allows direct insertion in continuous UHV conditions. The system is extremely flexible regarding sample size, able to handle everything from <1cm2 glass substrates to 6’ round wafers. Because of the ability to perform non-destructive analysis of relatively large samples, the EMIL lab is ideally and uniquely suited for advanced characterization of combinatorial materials libraries as well as industrial scale samples.
Regan Wilks is a staff scientist and deputy head of the Department of Interface Design at the HZB.
Johannes Frisch is a staff scientist in the Department of Interface Design at the HZB.
SESSION #6: Photonics - Simulation | Phillip Manley
SESSION #7: Perovskite Solar Cell Stability Testing – Indoor and Outdoor | Hans Köbler, Mark Khenkin
Indoor Testing
Perovskite Solar Cells (PSC) have travelled the road of success within the last decade. However, one remaining roadblock is the poor operational stability. It was just this year that leading scientists from all over the world published a “Consensus statement for stability assessment and reporting” in Nature Energy, also known as ISOS protocols, which is a milestone in PSC stability research.
At HZB, we are operating a High-Throughput Aging System for Perovskite Solar Cells, which is capable to MPP-track more than 350 individual solar cells under controlled conditions with the ability to cover the majority of the ISOS protocols.
Within the frame of the “VIPERLAB” EU project, we are opening the facility to our industry partners. In this breakout session, we will present the Aging System and talk about possibilities as well as requirements for future collaborations.
My name is Hans Köbler. Since 2014 I am working in the field of Perovskite Solar Cells, finishing my Master degree in Materials Science in 2016. Since then, I am working on the topic of PSC stability, at first at the Merck KGaA in Darmstadt 2016-2018. Since 2018 I am pursuing a PhD at HZB on the topic of stability.
Outdoor Testing
The PVcomB outdoor performance group analyses solar cell behaviour in real-world conditions. This spans from semi-industrial mini-modules of mature solar technologies like CIGS and silicon to research size solar cells for evolving technologies like perovskite solar cells. For the latter, it is particularly important to optimise the encapsulation strategy due to the high sensitivity of these cells towards moisture and oxygen. Having reliable outdoor data is vital for understanding the complex correlation between accelerated ageing test done indoors and the operational lifetime of novel perovskite-based device.
My name is Mark Khenkin. My background is in the domain of semiconductor physics. After finishing PhD in Moscow State University in 2016, I started to work on the topic of perovskite solar cells outdoor stability and accelerated aging in the group of prof. Eugene Katz, Ben-Gurion University of the Negev. In July 2019 I joined outdoor performance group of Carolin Ulbrich in HZB as a postdoc where I continued to study outdoor behaviour of perovskite solar cells.