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
2024 Circular water strategies in solar cells manufacturing
Brailovsky Signoret, Peter Henri; Reich, Jascha; Subasi, Dilara Maria; Fischer, Marie; Dannenberg, Tobias; Geißen, Sven-Uwe; Held, Michael; Briem, Ann-Kathrin; Rentsch, Jochen; Preu, Ralf; Nold, Sebastian
Zeitschriftenaufsatz
Journal Article
2023 PV-Produktion in Europa - Aktueller Status
Bett, Andreas W.; Rentsch, Jochen; Preu, Ralf
Konferenzbeitrag
Conference Paper
2023 Photovoltaics Versus Negative Emissions Technologies
Vadadkar, Sahil Vishram; Agrawal, Sankalp; Preu, Ralf
Konferenzbeitrag
Conference Paper
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 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 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 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
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 Crystalline Silicon Solar Cells - State-of-the-Art and Future Developments
Glunz, Stefan; Preu, Ralf
Aufsatz in Buch
Book Article
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 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 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
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 Status PV-Forschung und nachhaltige industrielle Umsetzung entlang der Wertschöpfungskette
Preu, Ralf
Vortrag
Presentation
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
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 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 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
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 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
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 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 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
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
2019 Verfahren zur Herstellung einer photovoltaischen Solarzelle und photovoltaische Solarzelle
Nekarda, Jan; Brand, Andreas; Graf, Martin; Preu, Ralf
Patent
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 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 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 Digitalisierung bei der Produktion von Solar- und Batteriezellen
Preu, Ralf; Rein, Stefan; Zimmer, Martin; Fleischer, J.; Weinmann, Hannes; Hofmann, J.
Konferenzbeitrag
Conference Paper
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 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
2018 Digitalisierung bei der Produktion von Solar- und Batteriezellen
Preu, Ralf; Rein, Stefan; Zimmer, Martin; Fleischer, J.; Weinmann, Hannes; Hofmann, J.
Vortrag
Presentation
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 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 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 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 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
2017 The development of shingled cells and modules
Preu, Ralf
Vortrag
Presentation
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 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 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 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
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 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 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 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
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 Photovoltaische Solarzelle
Krauß, Karin; Fertig, Fabian; Preu, Ralf; Jäger, Ulrich; Werner, Sabrina
Patent
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 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 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 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 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
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 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 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
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 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 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 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 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 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 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: 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 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
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 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
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 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 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 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 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 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 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 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 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 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 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 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 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-based foil metallization for industrial PERC solar cells
Nekarda, Jan; Graf, M.; Rodofili, Andreas; Preu, Ralf; Böhme, R.; Sontag, D.
Konferenzbeitrag
Conference Paper
Diese Liste ist ein Auszug aus der Publikationsplattform Fraunhofer-Publica

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