«Mass volume manufacturing of high-efficiency silicon solar cells»

Transcription

1 Wednesday, 27 th May am Pierre VERLINDEN, VP, Chief Scientist and State key Laboratory Vice-Chair at Trina Solar, (China) «Mass volume manufacturing of high-efficiency silicon solar cells» Large volume manufacturing of high-efficiency solar cells and high-performance PV modules is very challenging. From a first demonstration in laboratory to commercialization, a long delay of 20 to 25 years is typical to implement high-efficiency features into a low-cost industrial process and to demonstrate a reduction in Levelized Cost of Electricity (LCOE) beneficial to the customer. Some of the main challenges are (1) the introduction of low-contamination processing technologies in a PV industry that has been characterized for many years by a simple low-cost process in a relatively dirty environment, (2) contamination control, (3) quality control. The development of several high-efficiency silicon solar cells is reported, as well as of a new PV module concept including light trapping structures, and a new highly reliable dual-glass module. Mono and multi-crystalline champion p-type i-perc silicon cells have reached efficiencies of 21.40% and 20.76% respectively. A high-power PV module made of 60 mono i-perc 6 cells, including half-cell and advanced light-trapping technologies, has reached a power output of 335.2W. A champion 6 Interdigitated Back Contact (IBC) Si solar cell has reached an efficiency of 22.9% and a 60-cell IBC module demonstrated a power output of 320.4W. Dual-glass modules have demonstrated excellent resistance to micro-crack formation and Potential Induced Degradation (PID), with less than 3% degradation after 600 hours in 85 C-85%R.H. environment, 1000V bias and its surfaces covered with copper foil. Pierre J. Verlinden is Vice-President and Chief Scientist at Trina Solar since He is also Vice-Chair of the State Key Laboratory of PVST and Vice Director of the Jiangsu Province Enterprise Engineering Technology Center. Dr. Verlinden holds a Ph.D. and a Master s degree in Electrical Engineering from the Université Catholique de Louvain in Belgium. He started his career in academia, teaching semiconductor physics, integrated circuit and PV technology at the Université Catholique de Louvain, as well as researching in the field of IBC solar cells for CPV application. He was visiting scholar at Stanford University, in He has been working in the field of photovoltaics for 35 years and has published over 100 technical papers and contributed to a number of books. He holds 10 patents. Before joining Trina Solar, Dr. Verlinden founded AMROCK in Australia and served from 2005 to 2012 as Managing Director and Chief Scientist. From 2005 to 2009, Dr. Verlinden also worked as Principal Scientist at Solar Systems, Melbourne, developing dense array III-V multi-junction modules for CPV applications. Earlier in his career, he was Manager PV Technology and Operations at Origin Energy Solar; and in 1991 he was one of the original employees at SunPower Corporation where he worked for 11 years as Director of Research & Development, developing high-efficiency Silicon IBC solar cells for highvalue applications (CPV, solar race cars, solar airplanes and finally flat-plate PV) as well as other high-engineering opto-electronic products.

2 Wednesday, 27 th May pm Prof. Dr. Klaus LIPS, Head of EMIL - Helmholtz-Zentrum Berlin für Materialien und Energie, (Germany) «EMIL - a novel research platform for thin-film photovoltaics at the BESSY II synchrotron light source» A knowledge-based approach towards developing a new generation of solar energy conversion devices requires a fast and direct feedback between sophisticated analytics and state-of-the-art processing facilities for all relevant material classes. A promising approach is the coupling of synchrotronbased X-ray characterization techniques, providing the unique possibility to map the electronic and chemical structure of thin layers and interface regions with relevant in-system/in-situ sample preparation in one dedicated vacuum system. EMIL, the Energy Materials In-situ Laboratory Berlin, is a unique facility at the BESSY II synchrotron light source. EMIL will be dedicated to the in-situ and inoperando X-ray analysis of materials and devices for photovoltaic applications and of photo-electrochemical processes. EMIL can serve up to five experimental end-stations, three of them can access X-rays in an energy range 80 ev 10 kev. EMIL comprises all characterization and deposition facilities in one integrated ultra-high vacuum system. EMIL s deposition tools allow the growth of PV devices based on silicon, compound semiconductors, hybrid heterojunctions, and organo-metal halide perovskites on up to 6 sized substrates. EMIL will serve as a research platform for national and international collaboration in the field of photovoltaic/photocatalytic energy conversion and beyond. In this presentation, we will provide an overview of the analytic and material capabilities at EMIL. Klaus Lips has a background in solar energy research and is specialized in the spectroscopy in bulk and interface defect properties of thin-film materials for photovoltaic application. He contributed to over 170 scientific papers and holds several patents. Klaus studied physics in Leiden (NL) and Marburg (Germany). He received his PhD from the University of Marburg for which he was honored the Geiger award. After his postdoc time at the National Renewable Energy Laboratory (NREL) in Golden, Colorado, USA, Klaus joined the Institute of Silicon Photovoltaics of the former Hahn-Meitner-Institut, now Helmholtz-Zentrum Berlin. In 2002 Klaus became deputy director of that institute, a position he held until In 2011 he was nominated visiting professor at the University of Sydney and developed with his partners from USYD and UNSW a technology that allowed the successful implementation of photochemical upconversion into PV devices. Since 2011 Klaus is head of the Energy Materials In-situ Laboratory Berlin (EMIL). In 2012 he was nominated professor at the physics department of the Free University Berlin (FUB), where he established the Berlin Joint EPR Laboratory. Klaus is vice president of the European Society for Quantum Solar Energy Conversion and organizes the yearly Quantsol Summer School on Photovoltaics.

3 Wednesday, 27 th May pm Professor Hiroshi SEGAWA, Head of the Research Center for Advanced Science and Technology - The University of Tokyo, (Japan) «Hybrid Solar Cells for Next Generation Photovoltaics» Next-generation solar cells based on new concepts and/or novel materials are currently attracting wide attention. In this lecture, a spectral splitting organic photovoltaics based on the panchromatic dye-sensitized solar cell and the perovskite solar cell will be reported with power conversion efficiency of about 21.5%. Additionally energy-storable dye-sensitized solar cell (ES- DSSC) which generates electric power and stores the electricity by itself will be reported. Based on the concept of the ES-DSSC, we constructed a new designed panels, namely «annabelle». Hiroshi Segawa is a professor at the Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Japan. He earned his Ph.D. in Molecular Engineering from Kyoto University in In 1995 he joined the University of Tokyo as Associate Professor of the Department of Chemistry at the Graduate School of Arts and Sciences. From 1997 he has also been in charge of the Department of Applied Chemistry at the Graduate School of Engineering. In 2006 Professor Segawa joined RCAST. From 2010, he became director of the Academic-Industrial Joint Laboratory for Renewable Energy of RCAST. His research is focused on the development of molecular based photo-energy conversion systems.

4 Thursday, 28 th May am Dr. Friedrich SCHAAFF, CEO, Silicon Products, (Germany) «Key triggers in further development of silicon production» Attractiveness to customers this was defined in the past by material availability ( ), followed by pricing (2009- ). As the bottom line of the cost structure of the dominating manufacturing process (Siemens / TCS) is close to be reached by experienced players after running through a 50-years learning curve and the qualification of alternatives in silicon deposition for mass production is not proven yet, the term attractiveness needs to be newly defined. The product quality is moving more and more into the focus. But what is quality meaning? During a closer look, not only impurity levels itself are of customer s interest, but also reliability and traceability of the source and the applied technology become to play a more important role. This advanced interpretation of quality does not distinguish from the origin or the manufacturing process of the material. Thinking further in this direction will lead us to more and more tailor made products, which can only be developed in a close and faithful cooperation between customer and supplier. Since June 2013 Managing Partner at Silicon Products Bitterfeld GmbH Head of Process technology & Development at PV Crystalox Solar Silicon GmbH Responsible for designing, commissioning and operating a new plant for solar grade silicon Engineer at an international operating process and equipment company Educated 2006 as an chemical engineer with PhD at university Erlangen-Nuremberg

5 Thursday, 28 th May pm Dr. Sebastian MEIER, Belectric OPV, (Germany) «OPV from an Industrial Perspective» BELECTRIC OPV GmbH is headquartered in Nuremberg, where it develops and manufactures organic solar panels, with a focus on their commercialization. OPV can be used anywhere where design and function should not exclude themselves from lifestyle products to the design of building facades. The application possibilities are almost unlimited. This is based on the broad spectrum of advantages. OPV works well under diffuse or low light and can achieve good yield even with non-optimal orientation. Also in terms of ecological balance OPV-based products are far ahead of the solar modules from the first and second generation and in contrast to these, OPV-based products can be recycled easily as well. But clearly the most outstanding advantage is the freedom in design, shape and color. This provides designers with style and design possibilities and opens up completely new aesthetic, ecological, and economic options for integrating photovoltaics into products. The spectrum ranges from energy production for lighting objects, transparent and colored accessories for sports, leisure, and fashion through attractive PV surfaces to match the design to inlays for product integration into all kinds of mobile and stationary applications. Furthermore, the new range also includes products that focus on the architecture sector and offer unprecedented possibilities for energy harvesting in facade design and urban furnishings. Unlike today s conventional PV modules, OPV modules can contribute to the appealing design of building facades. Thus, it provides the architect with a new degree of freedom in the energy upgrading of buildings, including any aesthetic requirements. Although it is still an exception, the use of PV in building envelopes does not need to be a marginal phenomenon in the field of renewable energies, as the available areas are not irrelevant: Each year, approximately 500 million m² are newly built in Germany and thus represent an enormously large reservoir of freely available space. Sebastian B. Meier is currently Project Manager R&D at Belectric OPV GmbH, Germany. He holds a Diploma degree in Materials Science and a Ph.D. in Engineering from the Friedrich-Alexander University of Erlangen-Nuremberg, Germany. Sebastian joined the Siemens Research Laboratories in Erlangen, Germany as a PhD student by the end of 2009, working on organic lightemitting devices. At the beginning of 2013 he had a short research stay at the Institute for Molecular Sciences, University of Valencia, Spain before joining Belectric OPV as a research scientist in the mid of Sebastian is author and co-author of 10 scientific publications in recognized international journals and 2 patents in the field of organic light-emitting devices. Currently he is involved in several European and German projects in the field of organic and printable photovoltaics.

6 Friday, 23 rd May am Dr. Edgardo SAUCEDO, Catalonia Institute for Energy Research, (Spain) «The importance of interfaces modification for high efficiency kesterite based solar cells» Earth abundant element based absorbers, like kesterites (Cu2ZnSn(S,Se)4-CZTSSe), have a strong potential to contribute in the mid to long term to the massive sustainable deployment of thin films photovoltaic (PV) technologies. In this talk, the main strategies to achieve high efficiencies with CZTSSe based devices will be reviewed. From the discovery of the Mo/CZTSSe back contact instability, the complex surface composition of kesterites and the optimization of CZTSSe/buffer layers (including Cd-free buffers), the main peculiarities of kesterites will be discussed. The presentation will show very new results related to the management of these interfaces with advanced concepts, that has allowed obtaining devices in the 9-12% efficiency range, and challenges to go be-yond 15% efficiency level will be discussed. Dr E. Saucedo received his PhD in Materials Physic at the Universidad Autónoma de Madrid, Spain in He spent three years of posdoc in France (IRDEP (Paris, France) and NEXCIS), before joining the Catalonia Institute for Energy Research (IREC) in Barcelona in Currently he is the responsible of the Photovoltaics Laboratory at the Solar Energy Materials and Systems Group at IREC, working in the development of new materials and concepts for thin film photovoltaic technology. He holds four patents and has co-authored more than 95 papers in recognized international journals and more than 150 contributions to conferences all around the world. He has been involved in more than 15 European and Spanish Projects in the PV field (Scalenano, Inducis, Pvicokest, KestPV, Larcis, etc.), and he is the general coordinator of the ITN Marie Curie network Kestcell ( one of the most important initiatives in Europe for the development of Kesterites. He is currently supervising 8 PhD Thesis.