Fraunhofer Institute for Solar Energy Systems ISE
Fraunhofer Institute for Solar Energy Systems ISE

Dr. Ralf Preu

Director, Division Photovoltaics - Production Technology

Curriculum vitae

Since 2018 Director, Division Photovoltaics - Production Technology
Since 2008  Private Lecturer
Albert-Ludwigs-Universität Freiburg im Breisgau
Lecture photovoltaic technology in Renewable energy management master
1/2011 - 12/2017 Head of Division PV Production Technology and Quality Assurance
1/2007 - 12/2010

Head of Department PV Production Technology and Quality Assurance
Fraunhofer ISE
1/2002 - 12/2006

Department PV Production Technology and Quality Assurance
Head of Group
Fraunhofer ISE
3/2004 - 6/2006 CEO
PSE project company Solare Energiesysteme GmbH
1996 - 2003 Open University Hagen
Diploma Econophysicist
1996 - 2000 Open University Hagen
Dr.-Ing., Electrical Engineering and Electronics
1988 - 1996 Albert-Ludwigs-University Freiburg im Breisgau
Diploma, Physics
1992 – 1993 University of Toronto
Physics, Graduate Student 

Awards & outstanding achievements

5/2016

Laser Fired Contact Technology for the Production of Highly Efficient Silicon Solar Cells

Joseph von Fraunhofer Prize
Fraunhofer Society e.V. 
5/2014

Innovation Award Laser Technology

Working Group Laser Technology e.V. / European Laser Institute
1/2003

Dr. Meyer-Struckmann Science Award

Brandenburg University of Technology Cottbus (BTU)

Publications

Jahr
Year		Titel/Autor:in
Title/Author		Publikationstyp
Publication Type
2023 Light Soaking Effects on Full-Area and Half-Cut Silicon Heterojunction Solar Cells
Pingel, Sebastian; Steinmetz, Anamaria; Bivour, Martin; Roder, Sebastian; Voicu Vulcanean, Ioan; Zimmermann, Karin; Wolke, Winfried; Georgiou-Sarlikiotis, Vasileios; Tutsch, Leonard; Wenzel, Timo; Gebhardt, Paul; Lorenz, Andreas; Münzer, Anna; Baliozian, Puzant; Rentsch, Jochen; Erath, Denis; Richter, Armin; Fokuhl, Esther; Clement, Florian; Rößler, Torsten; Preu, Ralf; Nekarda, Jan		 Konferenzbeitrag
Conference Paper
2023 Passivated Edge Technology (PET): Edge Passivation for Industrial Solar Cell Applications
Lohmüller, Elmar; Huyeng, Jonas; Hofmann, Marc; Baliozian, Puzant; Richter, Armin; Göbel, Alexander; Clement, Florian; Preu, Ralf		 Vortrag
Presentation
2023 Overcoming Throughput Limitations of Laser Systems in Solar Cell Manufacturing via On-The-Fly Processing using Polygon Scanners
Hoppe, Georg; Alvarez Brito, Eduardo Ignacio; Emanuel, Gernot; Nekarda, Jan; Diehl, Moritz; Preu, Ralf; Meyer, Fabian		 Zeitschriftenaufsatz
Journal Article
2023 Challenges and Advantages for Cut Solar Cells for Shingling and Half-Cell Modules
Huyeng, Jonas; Lohmüller, Elmar; Rößler, Torsten; Shabanzadeh, Behnaz; Reichel, Christian; Weber, Julian; Hofmann, Marc; Kutzleben, Daniel von; Abdel Latif, Najwa; Kraft, Achim; Neuhaus, Holger; Clement, Florian; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2023 TOPCon Shingle Solar Cells: Thermal Laser Separation and Passivated Edge Technology
Lohmüller, Elmar; Baliozian, Puzant; Gutmann, Leon; Kniffki, Leander; Richter, Armin; Wang, Lili; Dunbar, Ricky; Lepert, Arnaud; Huyeng, Jonas; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2023 Next Generation High Throughput Production Processes & Inline Characterization for Si Solar Cells
Clement, Florian; Meßmer, Marius; Höffler, Hannes; Ourinson, Daniel; Goraya, Baljeet Singh; Emanuel, Gernot; Meyer, Fabian; Lorenz, Andreas; Bartsch, Jonas; Demant, Matthias; Nold, Sebastian; Wolf, Andreas; Zimmer, Martin; Greulich, Johannes; Preu, Ralf; Köpge, Ringo; Ramspeck, Klaus; Hemsendorf, Marc; Straub, Benedikt; Ebert , Christian; Drews, Matthias; Jooss, Wolfgang; Schmid, Elina; Schönfelder, Stephan		 Vortrag
Presentation
2023 PV-Produktion in Europa - Aktueller Status
Bett, Andreas W.; Rentsch, Jochen; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2022 Lessons learned from 25 years production technology research & development
Preu, Ralf; Rentsch, Jochen; Rein, Stefan; Clement, Florian; Nekarda, Jan; Saint-Cast, Pierre; Lohmüller, Sabrina; Lohmüller, Elmar; Greulich, Johannes; Wöhrle, Nico; Mack, Sebastian; Wolf, Andreas; Pingel, Sebastian; Steinmetz, Anamaria; Baliozian, Puzant; Goraya, Baljeet Singh; Nold, Sebastian; Glunz, Stefan; Bett, Andreas W.		 Vortrag
Presentation
2022 Status PV-Forschung und nachhaltige industrielle Umsetzung entlang der Wertschöpfungskette
Preu, Ralf		 Vortrag
Presentation
2022 Passivating contacts for high-efficiency silicon solar cells based on poly-Si/SiOx structures - From Lab to Fab
Glunz, Stefan; Polzin, Jana-Isabelle; Richter, Armin; Steinhauser, Bernd; Müller, Ralf; Benick, Jan; Reichel, Christian; Kafle, Bishal; Goraya, Baljeet Singh; Mack, Sebastian; Nold, Sebastian; Rentsch, Jochen; Hermle, Martin; Preu, Ralf		 Vortrag
Presentation
2022 Lessons Learned From 25 Years Production Technology Research & Development
Preu, Ralf; Rentsch, Jochen; Rein, Stefan; Clement, Florian; Nekarda, Jan; Saint-Cast, Pierre; Lohmüller, Elmar; Lohmüller, Sabrina; Greulich, Johannes; Wöhrle, Nico; Pingel, Sebastian; Steinmetz, Anamaria; Baliozian, Puzant; Nold, Sebastian; Goraya, Baljeet Singh; Glunz, Stefan; Bett, Andreas W.		 Konferenzbeitrag
Conference Paper
2022 TOPCon Silicon Solar Cells. From Pilot Line to Fab
Mack, Sebastian; Kafle, Bishal; Krieg, Katrin; Teßmann, Christopher; Bashardoust, Sattar; Wolf, Andreas; Kluska, Sven; Rentsch, Jochen; Preu, Ralf		 Vortrag
Presentation
2022 Crystalline Silicon Solar Cells - State-of-the-Art and Future Developments
Glunz, Stefan; Preu, Ralf		 Aufsatz in Buch
Book Article
2022 R&D Project NextTec - Next Generation High Throughput Production Processes & Inline Characterization for Si Solar Cells
Clement, Florian; Meßmer, Marius; Höffler, Hannes; Ourinson, Daniel; Goraya, Baljeet Singh; Emanuel, Gernot; Meyer, Fabian; Lorenz, Andreas; Bartsch, Jonas; Demant, Matthias; Nold, Sebastian; Wolf, Andreas; Zimmer, Martin; Preu, Ralf; Ramspeck, Klaus; Hemsendorf, Marc; Straub, Benedikt; Ebert , Christan; Drews, Matthias; Joos, Wolfgang; Schmid, Elina; Schönfelder, Stephan; Koepge, Ringo		 Vortrag
Presentation
2021 Thermal Laser Separation of PERC and SHJ Solar Cells
Baliozian, Puzant; Münzer, Anna; Lohmüller, Elmar; Nair, A.; Fellmeth, Tobias; Wöhrle, Nico; Höffler, Hannes; Spribille, Alma; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2021 SMART Cast-Monocrystalline p-Type Silicon Passivated Emitter and Rear Cells: Efficiency Benchmark and Bulk Lifetime Analysis
Maus, Stephan; Maischner, Felix; Riepe, Stephan; Greulich, Johannes M.; Lohmüller, Elmar; Schindler, Florian; Saint-Cast, Pierre; Krenckel, Patricia; Hess, A.; Lohmüller, Sabrina; Wolf, Andreas; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2021 Post-Separation Processing for Silicon Heterojunction Half Solar Cells With Passivated Edges
Münzer, Anna; Baliozian, Puzant; Steinmetz, Anamaria; Geipel, Torsten; Pingel, Sebastian; Richter, Armin; Roder, Sebastian; Lohmüller, Elmar; Spribille, Alma; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2021 A model for screen utility to predict the future of printed solar cell metallization
Tepner, Sebastian; Ney, Linda; Singler, Marius; Preu, Ralf; Pospischil, Maximilian; Clement, Florian		 Zeitschriftenaufsatz
Journal Article
2020 Post-Metallization Passivated Edge Technology (PET) for Bifacial Silicon Shingle Solar Cells - pSPEERPET
Baliozan, Puzant; Lohmüller, Elmar; Fellmeth, Tobias; Richter, Armin; Münzer, Anna; Bhandary, A.; Wöhrle, Nico; Spribille, Alma; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2020 Laser Assisted Separation Processes for Bifacial pSPEER Shingle Solar Cells
Münzer, Anna; Baliozan, Puzant; Ahmed, K.; Nair, A.; Lohmüller, Elmar; Fellmeth, Tobias; Spribille, Alma; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2020 Postmetallization "Passivated Edge Technology" for Separated Silicon Solar Cells
Baliozian, Puzant; Al-Akash, Mohammad; Lohmüller, Elmar; Richter, Armin; Fellmeth, Tobias; Münzer, Anna; Wöhrle, Nico; Saint-Cast, Pierre; Stolzenburg, H.; Spribille, Alma; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2020 Project "Rock-Star" - High-Speed Rotary Printing for Solar Cell Metallization: From Vision to Reality
Lorenz, Andreas; Röth, J.; Zengerle, K.; Linse, Michael; Klawitter, Markus; Tepner, Sebastian; Wirth, N.; Greutmann, R.; Lehner, M.; Senne, A.; Reukauf, D.; Mette, A.; Hage, F.; Drews, Mathias; Gombert, S.; Brocker, H.; Rohde, J.; Dörsam, E.; Clement, Florian; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2020 The International Technology Roadmap for Photovoltaics and the Significance of it's Decade-Long Projections
Baliozan, Puzant; Tepner, Sebastian; Fischer, Marie; Trube, J.; Herritsch, S.; Gensowski, Katharina; Clement, Florian; Nold, Sebastian; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2020 Passivated emitter and rear cell - Devices, technology, and modeling
Preu, Ralf; Lohmüller, Elmar; Lohmüller, Sabrina; Saint-Cast, Pierre; Greulich, Johannes M.		 Zeitschriftenaufsatz
Journal Article
2020 "ROCK-STAR" - High-Speed Rotary Printing for Solar Cell Metallization: From Vision to Reality
Lorenz, Andreas; Röth, J.; Klawitter, Markus; Zengerle, K.; Linse, Michael; Tepner, Sebastian; Wirth, N.; Greutmann, R.; Lehner, M.; Senne, A.; Reukauf, D.; Mette, A.; Hage, F.; Drews, Mathias; Gombert, S.; Brocker, H.; Rohde, J.; Dörsam, E.; Clement, Florian; Preu, Ralf		 Vortrag
Presentation
2020 Front Side Optimization on Boron- and Gallium-Doped Cz-Si PERC Solar Cells Exceeding 22% Conversion Efficiency
Lohmüller, Elmar; Greulich, Johannes M.; Saint-Cast, Pierre; Lohmüller, Sabrina; Schmidt, Stefan; Belledin, Udo; Fellmeth, Tobias; Mack, Sebastian; Emanuel, Gernot; Krieg, Katrin; Zimmer, Martin; Kunert, Roland; Zobel, Frank; Linse, Michael; Horzel, Jörg; Meßmer, Marius; Wolf, Andreas; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2020 Cast-mono Silicon Wafers for a Sustainable PV Market Growth
Riepe, Stephan; Nold, Sebastian; Brailovsky Signoret, Peter Henri; Krenckel, Patricia; Friedrich, Lorenz; Janz, Stefan; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2019 Competitiveness of a European PV Manufacturing Chain
Rentsch, Jochen; Nold, Sebastian; Preu, Ralf; Bett, Andreas W.; Jooss, W.; Trube, J.; Fath, P.		 Zeitschriftenaufsatz
Journal Article
2019 Digitalisierung bei der Produktion von Solar- und Batteriezellen
Preu, Ralf; Rein, Stefan; Zimmer, Martin; Fleischer, J.; Weinmann, Hannes; Hofmann, J.		 Konferenzbeitrag
Conference Paper
2019 PERC-Based Shingled Solar Cells and Modules at Fraunhofer ISE
Baliozian, Puzant; Klasen, Nils; Wöhrle, Nico; Kutter, Christoph; Stolzenburg, H.; Münzer, Anna; Saint-Cast, Pierre; Mittag, Max; Lohmüller, Elmar; Fellmeth, Tobias; Al-Akash, Mohammad; Kraft, Achim; Heinrich, Martin; Richter, Armin; Fell, Andreas; Neuhaus, Dirk Holger; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2019 Verfahren zur Herstellung einer photovoltaischen Solarzelle und photovoltaische Solarzelle
Nekarda, Jan; Brand, Andreas; Graf, Martin; Preu, Ralf		 Patent
2019 Impact of POCl3 Diffusion Process Parameters on Oxygen Precipitation in Czochralski-Grown Silicon
Maus, Stephan; Lohmüller, Sabrina; Mu, D.; Schön, Jonas; Niewelt, Tim; Wolf, Andreas; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2019 "Project FINALE" - Screen and Screen Printing Process Development for Ultra-Fine-Line Contacts below 20µm Finger Width
Clement, Florian; Linse, Michael; Tepner, Sebastian; Wengenmeyr, Noah; Ney, Linda; Krieg, Katrin; Lorenz, Andreas; Pospischil, Maximilian; Bechmann, Sebastian; Oehrle, K.; Steckemetz, S.; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2019 Precise Selective Doping and Metallization for Next-Generation PERC Technology
Keding, Roman; Efinger, Raphael; Lohmüller, Elmar; Jahn, Mike; Fellmeth, Tobias; Meßmer, Marius; Meier-Meybrunn, S.; Horzel, Jörg; Lohmüller, Sabrina; Weber, Julian; Demant, Matthias; Lorenz, Andreas; Saint-Cast, Pierre; Brand, Andreas; Nekarda, Jan; Clement, Florian; Greulich, Johannes M.; Preu, Ralf; Pickrell, M.; Hermans, J.		 Vortrag
Presentation
2018 Verfahren zum Anheften einer metallischen Folie an eine Oberfläche eines Halbleitersubstrats und Halbleiterbauelement mit einer metallischen Folie
Graf, Martin; Nekarda, Jan; Preu, Ralf		 Patent
2018 Bifacial pSPEER Solar Cells for Shingle Modules
Baliozan, Puzant; Fellmeth, Tobias; Wöhrle, Nico; Lohmüller, Elmar; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2018 Bifacial p-type silicon shingle solar cells - the "pSPEER" concept
Baliozian, Puzant; Lohmüller, Elmar; Fellmeth, Tobias; Wöhrle, Nico; Krieg, Alexander; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2018 Metallization Fraction of Bifacial pSPEER Shingle Solar Cells
Al-Akash, Mohammad; Baliozan, Puzant; Lohmüller, Elmar; Fellmeth, Tobias; Wöhrle, Nico; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2018 Bifacial shingle solar cells on p-type Cz-Si (pSPEER)
Baliozan, Puzant; Lohmüller, Elmar; Fellmeth, Tobias; Wöhrle, Nico; Krieg, Alexander; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2018 Digitalisierung bei der Produktion von Solar- und Batteriezellen
Preu, Ralf; Rein, Stefan; Zimmer, Martin; Fleischer, J.; Weinmann, Hannes; Hofmann, J.		 Vortrag
Presentation
2018 Industry related approaches for bifacial p-type PERX solar cells
Fellmeth, Tobias; Meier, S.; Lohmüller, Elmar; Wöhrle, Nico; Spribille, Alma; Lohmüller, Sabrina; Saint-Cast, Pierre; Wolf, Andreas; Clement, Florian; Rein, Stefan; Preu, Ralf; Nakahara, M.; Dhamrin, Marwan; Knauss, H.; Haverkamp, H.; Steckemetz, S.; Bitnar, Bernd; Weber, T.; Palinginis, Phedon; Neuhaus, Dirk Holger		 Zeitschriftenaufsatz
Journal Article
2018 Emitter Formation and Passivation Dependence on Crystal Grain Orientations after Atmospheric Pressure Dry Nanotexturing
Ridoy, Ahmed Ismail; Kafle, Bishal; Saint-Cast, Pierre; Lohmüller, Sabrina; Norouzi, M.H.; Clochard, Laurent; Duffy, Edward; Hofmann, Marc; Rentsch, Jochen; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2018 Impact of solidification dynamics on crystal properties of silicon molten by a nanosecond laser pulse
Meyer, Fabian; Büchler, Andreas; Brand, Andreas A.; Dasa, M.K.; Nekarda, Jan F.; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2017 Metallization of passivating and carrier selective contacts: Status and perspectives at Fraunhofer ISE
Bivour, Martin; Bartsch, Jonas; Clement, Florian; Cimiotti, Gisela; Erath, Denis; Feldmann, Frank; Fellmeth, Tobias; Glatthaar, Markus; Hermle, Martin; Jahn, Mike; Kluska, Sven; Keding, Roman; Lorenz, Andreas; Lacmago Lontchi, Igor-Clavau; Mack, Sebastian; Moldovan, Anamaria; Nekarda, Jan; Pospischil, Maximilian; Rodofili, Andreas; Rentsch, Jochen; Steinhauser, Bernd; Schube, Jörg; Wolke, Winfried; Preu, Ralf; Glunz, Stefan W.		 Konferenzbeitrag
Conference Paper
2017 The development of shingled cells and modules
Preu, Ralf		 Vortrag
Presentation
2017 Rear passivated mc-Si solar cells textured by atmospheric pressure dry etching
Saint-Cast, Pierre; Kafle, Bishal; Pandey, R.; Ridoy, Ahmed Ismail; Hofmann, Marc; Clochard, Laurent; Schwarze, T.; Pittroff, M.; Rentsch, Jochen; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2017 A new pilot research facility for HJT and selective contact solar cells - PV-TEC SELECT
Rentsch, Jochen; Bivour, Martin; Erath, Denis; Feldmann, Frank; Fischer, Andreas; Mack, Sebastian; Moldovan, Anamaria; Temmler, Jan; Hermle, Martin; Glunz, Stefan W.; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2017 Predicting bulk lifetime values by applying wet chemistry H-termination for inline quality control of silicon wafers
Al-Hajjawi, Saed; Haunschild, Jonas; Zimmer, Martin; Dannenberg, Tobias; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2017 Technical and economic potential of PV in Lebanon and Jordan aiming for regional readiness level development
Haidar, Mohamad; Baliozan, Puzant; Mustafa, A.; Mourad, S.; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2017 Analysis of the losses of industrial-type PERC solar cells
Saint-Cast, Pierre; Werner, Sabrina; Greulich, Johannes M.; Jäger, Ulrich; Lohmüller, Elmar; Höffler, Hannes; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2017 High throughput printing for highly efficient cost-effective Si solar cells
Clement, Florian; Lorenz, Andreas; Pospischil, Maximilian; Biro, Daniel; Brocker, H.; Bangel, D.; Greutmann, R.; Lehner, M.; Ott, T.; Hage, F.; Oppelt, K.; Honold, T.; Wende, L.; Ringel, M.; Senne, A.; Rohde, J.; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2017 Key aspects for fabrication of p-type Cz-Si PERC solar cells exceeding 22% conversion efficiency
Werner, Sabrina; Lohmüller, Elmar; Saint-Cast, Pierre; Greulich, Johannes M.; Weber, Julian; Schmidt, Stefan; Moldovan, Anamaria; Brand, Andreas; Dannenberg, Tobias; Mack, Sebastian; Wasmer, Sven; Demant, Matthias; Linse, Michael; Ackermann, Rupprecht; Wolf, Andreas; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2017 Increasing the efficiency of multicrystalline silicon PERC solar cells from currently 19% to 20%
Greulich, Johannes M.; Lohmüller, Elmar; Saint-Cast, Pierre; Werner, Sabrina; Wasmer, Sven; Horst, A.J. van der; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2017 Passivierte Siliciummaterialien für Li-Ionenbatteriezellen
Gentischer, Harald; Hulitz, Sebastian; Mader, Markus; Singh, Rajveer; Keding, Roman; Preu, Ralf; Biro, Daniel		 Vortrag
Presentation
2017 The SPEER solar cell - simulation study of shingled bifacial PERC-technology-based stripe cells
Wöhrle, Nico; Fellmeth, Tobias; Lohmüller, Elmar; Baliozan, Puzant; Fell, Andreas; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2016 Photovoltaische Solarzelle
Krauß, Karin; Fertig, Fabian; Preu, Ralf; Jäger, Ulrich; Werner, Sabrina		 Patent
2016 Status of FolMet Technology: How to Produce PERC Cells More Cheaply than Al-BSF Cells
Nekarda, Jan F.; Graf, M.; John, Oliver; Nold, Sebastian; Nagel, Henning; Eberlein, Dirk; Kraft, Achim; Böhme, R.; Streek, A.; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2016 The influence of nitrogen on laser doping from phosphorous doped a-SiNx layers
Steinhauser, Bernd; Jäger, Ulrich; Benick, Jan; Chong, E.; Lam, J.; Steeman, R.; Rostan, H.; Nekarda, Jan; Hermle, Martin; Preu, Ralf; Glunz, Stefan W.		 Zeitschriftenaufsatz
Journal Article
2016 Photovoltaic Development Standardizing Based on Roadmaps and Technology Readiness Levels
Baliozan, Puzant; Mourad, S.; Morse, D.; Kim, S.; Friedrich, Lorenz; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2016 Economic feasibility of bifacial silicon solar cells
Fertig, Fabian; Nold, Sebastian; Wöhrle, Nico; Greulich, Johannes M.; Hädrich, Ingrid; Krauß, Karin; Mittag, Max; Biro, Daniel; Rein, Stefan; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2016 biPERC silicon solar cells enabling bifacial applications for industrial solar cells with passivated rear sides
Krauß, Karin; Fertig, Fabian; Greulich, Johannes M.; Rein, Stefan; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2016 Plasma-Free Dry-Chemical Texturing Process for High-Efficiency Multicrystalline Silicon Solar Cells
Kafle, Bishal; Freund, Timo; Mannan, Abdul; Clochard, Laurent; Duffy, Edward; Werner, Sabrina; Saint-Cast, Pierre; Hofmann, Marc; Rentsch, Jochen; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2015 Nanotextured multicrystalline Al-BSF solar cells reaching 18% conversion efficiency using industrially viable solar cell processes
Bishal, Kafle; Mannan, Abdul; Freund, Timo; Clochard, Laurent; Duffy, Edward; Hofmann, Marc; Rentsch, Jochen; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2015 Impact of texture roughness on the front-side metallization of stencil-printed silicon solar cells
Lorenz, Andreas; Strauch, T.; Demant, Matthias; Fellmeth, Tobias; Barnes Hofmeister, T.; Linse, Michael; Dannenberg, Tobias; Seiffe, Johannes; Clement, Florian; Biro, Daniel; Reinecke, Holger; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2015 Comprehensive comparison of different fine line printing technologies addressing the seed and plate approach with Ni-Cu-plating
Lorenz, Andreas; Kraft, Achim; Gredy, C.; Filipovic, Aleksander; Binder, Sebastian; Krüger, K.; Bartsch, Jonas; Clement, Florian; Biro, Daniel; Preu, Ralf; Reinecke, H.		 Konferenzbeitrag
Conference Paper
2015 Foil metallization process for PERC solar cells towards industrial feasibility
Graf, M.; Eberlein, Dirk; Nagel, Henning; Nekarda, Jan; Böhme, R.; Streek, A.; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2015 Comprehensive simulation and acceleration of the foil-metallization laser process
Graf, M.; Nekarda, Jan; Lazzarotto Togny, F.; Streek, A.; Böhme, R.; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2015 Progress on industrial solar cell front side metallization by parallel dispensing technology
Pospischil, Maximilian; Kuchler, Martin; Klawitter, Markus; Efinger, Raphael; Rodriguez, C.; Padilla, A.; Gentischer, Harald; König, M.; Hörteis, Matthias; Wende, L.; Mette, A.; Clement, Florian; Preu, Ralf; Biro, Daniel		 Konferenzbeitrag
Conference Paper
2014 Laserbasiertes Verfahren und Bearbeitungstisch zur Metallisierung der Rückseite eines Halbleiterbauelements
Hauser, Hubert; Nekarda, Jan; Preu, Ralf; Bläsi, Benedikt		 Patent
2014 Laserbasiertes Verfahren und Bearbeitungstisch zur lokalen Kontaktierung eines Halbleiterbauelements
Nekarda, Jan; Rodofili, Andreas; Brand, Andreas; Graf, Martin; Preu, Ralf		 Patent
2014 Vorrichtung und Verfahren zum Aufbringen einer Aluminiumoxidschicht auf ein Halbleitersubstrat
Saint-Cast, Pierre; Hofmann, Marc; Rentsch, Jochen; Preu, Ralf		 Patent
2014 The BOSCO solar cell: Simulation and experiment
Fertig, Fabian; Greulich, Johannes M.; Krauß, Karin; Clement, Florian; Biro, Daniel; Preu, Ralf; Rein, Stefan		 Zeitschriftenaufsatz
Journal Article
2014 Optimization of multi-layer metallization design for large-area back-contact back-junction solar cells
Hendrichs, M.; Keding, Roman; Spribille, Alma; Fellmeth, Tobias; Nold, Sebastian; Clement, Florian; Wolf, Andreas; Biro, Daniel; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2014 The BOSCO cell concept: Bifacial operation with double-sided collection
Fertig, Fabian; Krauß, Karin; Greulich, Johannes M.; Clement, Florian; Biro, Daniel; Preu, Ralf; Rein, Stefan		 Konferenzbeitrag
Conference Paper
2014 The BOSCO Solar Cell: Double-sided Collection and Bifacial Operation
Fertig, Fabian; Krauß, Karin; Greulich, Johannes M.; Clement, Florian; Biro, Daniel; Preu, Ralf; Rein, Stefan		 Zeitschriftenaufsatz
Journal Article
2014 The BOSCO solar cell - a both sides collecting and contacted structure
Fertig, Fabian; Krauß, Karin; Greulich, Johannes M.; Clement, Florian; Biro, Daniel; Preu, Ralf; Rein, Stefan		 Zeitschriftenaufsatz
Journal Article
2014 Advanced metallization concepts for p-type silicon Metal-Wrap-Through (MWT) solar cells
Hendrichs, M.; Thaidigsmann, Benjamin; Lohmüller, Elmar; Nold, Sebastian; Clement, Florian; Biro, Daniel; Rech, B.; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2014 Reduction of Picosecond Laser Ablation Threshold and Damage Via Nanosecond Pre-Pulse for Removal of Dielectric Layers on Silicon Solar Cells
Brand, Andreas A.; Meyer, Fabian; Nekarda, Jan F.; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2014 PECVD Al2O3 for Surface Passivation: A Review of Solar Cell and Thin Layer Characteristics Silicon Solar Cell
Kühnhold-Pospischil, Saskia; Saint-Cast, Pierre; Hofmann, Marc; Paramanathan, R.; El-Safoury, M.; Kafle, Bishal; Kania, Daniel; Weiss, L.; Heo, Y.-H.; Billot, Etienne; Olwal, P.; Rentsch, Jochen; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2014 Progress in laser-based foil metallization for industrial PERC solar cells
Graf, M.; Nekarda, Jan; Eberlein, Dirk; Wöhrle, Nico; Preu, Ralf; Böhme, R.; Grosse, T.		 Konferenzbeitrag
Conference Paper
2014 Investigations on the passivation mechanism of AlN:H and AlN:H-SiN:H stacks
Krugel, G.; Jenkner, F.; Moldovan, A.; Wolke, W.; Rentsch, J.; Preu, R.		 Zeitschriftenaufsatz
Journal Article
2014 Influence of rear-side passivation on solar cell performance of bosco solar cells
Krauß, Karin; Fertig, Fabian; Greulich, Johannes M.; Clement, Florian; Biro, Daniel; Preu, Ralf; Rein, Stefan		 Konferenzbeitrag
Conference Paper
2013 PECVD Al2O3/a-Si:B as a dopant source and surface passivation
Seiffe, Johannes; Gahoi, A.; Hofmann, Marc; Rentsch, Jochen; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2013 Investigation of methods for adhesion characterization of evaporated aluminum layers
Kumm, J.; Eberlein, Dirk; Hartmann, Philip; Wolke, Winfried; Wolf, Andreas; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2013 Passivation of solar cell emitters using aluminum nitride
Krugel, Georg; Sharma, A.; Moldovan, Anamaria; Wolke, Winfried; Rentsch, Jochen; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2013 Cost-optimized metallization layout for metal wrap through (MWT) solar cells and modules
Hendrichs, M.; Thaidigsmann, Benjamin; Fellmeth, Tobias; Nold, Sebastian; Spribille, Alma; Herrmann, P.; Mittag, Max; Hädrich, Ingrid; Eitner, Ulrich; Clement, Florian; Biro, Daniel; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2013 Evaluation of industrially relevant parameters for contact firing of screen printed front side silver contacts
Hönig, R.; Vössing, D.; Clement, Florian; Biro, Daniel; Preu, Ralf; Wilde, Jürgen		 Zeitschriftenaufsatz
Journal Article
2013 Recombination and optical properties of wet chemically polished thermal oxide passivated Si surfaces
Schwab, C.; Wolf, Andreas; Graf, M.; Wöhrle, Nico; Greulich, Johannes M.; Kühnhold-Pospischil, Saskia; Kästner, G.; Biro, Daniel; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2013 Technologies for mass production of > 20% efficient P-Type silicon solar cells
Mack, Sebastian; Wolf, Andreas; Thaidigsmann, Benjamin; Lohmüller, Elmar; Jäger, Ulrich; Pospischil, Maximilian; Clement, Florian; Eberlein, Dirk; Preu, Ralf; Biro, Daniel		 Konferenzbeitrag
Conference Paper
2013 Minimizing the optical cell-to-module losses for MWT-modules
Hädrich, Ingrid; Wiese, Martin; Thaidigsmann, Benjamin; Eberlein, Dirk; Clement, Florian; Eitner, Ulrich; Preu, Ralf; Wirth, Harry		 Zeitschriftenaufsatz
Journal Article
2013 Technology Options for a Multi-Gigawatt Fab in Europe
Preu, Ralf		 Vortrag
Presentation
2013 Study of hydrogenated AlN as an anti-reflective coating and for the effective surface passivation of silicon
Krugel, Georg; Sharma, A.; Wolke, Winfried; Rentsch, Jochen; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2013 P-Type MWT solar cells: Current status and future expectations
Thaidigsmann, Benjamin; Hendrichs, M.; Nold, Sebastian; Lohmüller, Elmar; Wolf, Andreas; Clement, Florian; Biro, Daniel; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2013 Potential-induced degradation on cell level: The inversion model
Saint-Cast, Pierre; Nagel, Henning; Wagenmann, Dirk; Schön, Jonas; Schmitt, P.; Reichel, Christian; Glunz, Stefan W.; Hofmann, Marc; Rentsch, Jochen; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2013 Wet chemical single-side emitter etch back for MWT solar cells with AL-BSF and challenges for via paste selection
Spribille, Alma; Lohmüller, Elmar; Thaidigsmann, Benjamin; Hamid, R.; Nussbaumer, H.; Clement, Florian; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2013 Evaluation of cast mono silicon material for thermal oxide passivated solar cells
Schwab, C.; Haunschild, Jonas; Graf, M.; Wufka, C.; Wolf, Andreas; Biro, Daniel; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2013 Laser doping from borosilicate glass for metallization of boron emitters
Fernandez-Robledo, S.; Jäger, Ulrich; Lohmüller, Elmar; Nekarda, Jan; Preu, Ralf		 Konferenzbeitrag
Conference Paper
2013 Laser-based foil metallization for industrial PERC solar cells
Nekarda, Jan; Graf, M.; Rodofili, Andreas; Preu, Ralf; Böhme, R.; Sontag, D.		 Konferenzbeitrag
Conference Paper
2013 Effects of high-temperature treatment on the hydrogen distribution in silicon oxynitride/silicon nitride stacks for crystalline silicon surface passivation
Schwab, C.; Hofmann, Marc; Heller, R.; Seiffe, Johannes; Rentsch, Jochen; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
2013 Benefit of selective emitters for p-type silicon solar cells with passivated surfaces
Jäger, Ulrich; Mack, Sebastian; Wufka, C.; Wolf, Andreas; Biro, Daniel; Preu, Ralf		 Zeitschriftenaufsatz
Journal Article
Diese Liste ist ein Auszug aus der Publikationsplattform Fraunhofer-Publica

This list has been generated from the publication platform Fraunhofer-Publica

Awards & outstanding achievements

Laser Fired Contact Technology for the Production of Highly Efficient Silicon Solar Cells

Joseph von Fraunhofer Prize
Fraunhofer Society e.V.
May 2016

Innovation Award Laser Technology

Working Group Laser Technology e.V. / European Laser Institute

May 2014

Dr. Meyer-Struckmann Science Award

Brandenburg University of Technology Cottbus (BTU)

January 2003