photovoltaics | publications

Most of the publications can be downloaded from the homepage of the PV division of the Univertsity of Konstanz.
 

S. Seren, Untersuchungen zum Ladungsträgertransport in multikristallinem Silizium, Diploma Thesis, 2002

 

S. Seren, Low Cost Solar Cells from Fast Grown Silicon Ribbon Materials, Dissertation, 2007, Hartung-Gorre Verlag Konstanz 2007, ISBN 3-86628-157-9

 

G. Hahn, S. Seren, D. Sontag, A. Gutjahr, L. Laas, A. Schönecker, Over 10% efficient Screen-printed RGS Solar Cells, Proc. 3rd WCPEC, Osaka, 2, 1285-1288, 2003

 

G. Hahn, D. Sontag, S. Seren, A. Schönecker, A. R. Burgers, R. Ginige, K. Cherkaoui, D. Karg, M. Stavola, Hydrogenation of multicrystalline Silicon - The Story continues, Proc. 19th EC PVSEC, Paris, 427-430, 2004

 

M. Kaes, S. Seren, T. Pernau, G. Hahn, LimoLIT – A novel Thermographic Characterisation Method for p/n Structures and Solar Cells, Proc. 19th EC PVSEC, Paris, 484-487, 2004

 

F. Huster, S. Seren, G. Schubert, M. Kaes, G. Hahn, O. Breitenstein, P. Altermatt, Shunts in Silicon Solar Cells below Screen-Printed Silver Contacts, Proc. 19th EC PVSEC, Paris, 832-835, 2004

 

M. Kaes, S. Seren, T. Pernau, G. Hahn, Light-modulated Lock-in Thermography for Photosensitive pn-Structures and Solar Cells, Prog. Photovolt., 12, 355-363, 2004

 

S. Seren, G. Hahn, A. Gutjahr, A. R. Burgers, A. Schönecker, Screen-Printed Ribbon Growth on Substrate Solar Cells approaching 12% Efficiency, Proc. 31th IEEE PVSC, Lake Buena Vista, 1055-1058, 2005 (Oral Presentation)

 

J. P. Rakotoniaina, O. Breitenstein, M. Kaes, S. Seren, G. Hahn, W. Warta, J. Isenberg, T. Pernau, Lock-in Thermography - A Universal Tool for Local Analysis of Solar Cells, Proc. 15th PVSEC, Shanghai, 1279-1280, 2005

 

S. Seren, G. Hahn, F. Huster, R. Kopecek, A. Gutjahr, A. R. Burgers, A. Schönecker, Screen-Printed Ribbon Growth on Substarte Solar Cells exceeding 12% Efficiency, Proc. 20th EC PVSEC, Barcelona, 720-705, 2005 (Oral Presentation)

 

O. Breitenstein, J. P. Rakotoniaina, M. Kaes, S. Seren, T. Pernau, G. Hahn, W. Warta, J. Isenberg, Lock-In Thermography - A universal Tool for local Analysis of Solar Cells, Proc. 20th EC PVSEC, Barcelona, 590-593, 2005

 

S. Seren, G. Hahn, A. Gutjahr, A. R. Burgers, A. Schönecker, A. Grenko, R. Jonczyk, Ribbon Growth on Substrate and Molded Wafer - Two Low Cost Silicon Ribbon Materials for PV, Proc. 4th WCPEC, Waikoloa, 2, 1330-1333, 2006

 

G. Hahn, S. Seren, M. Kaes, A. Schönecker, J. Kalejs, C. Dubé, A. Grenko, C. Belouet, Review on Ribbon Silicon Techiques for Cost Reduction in PV, Proc. 4th WCPEC, Waikoloa, 972-975, 2006

 

A. R. Burgers, A. Gutjahr, L. Laas, A. Schönecker, S. Seren, G. Hahn, Near 13% Efficiency Shunt free Solar Cells on RGS Wafers, Proc. 4th WCPEC, Waikoloa, 1183-1186, 2006

 

S. Seren, G. Hahn, A. Gutjahr, A. R. Burgers, A. Schönecker, Ribbon Growth on Substrate – A Roadmap to Higher Efficiencies, Proc. 21st EU PVSEC, Dresden, 668, 2006 (Oral Presentation)

 

A. R. Burgers, S. Seren, A. Gutjahr, A. Schönecker, G. Hahn, Record 13% efficiency screen-printed silicon solar cells on RGS material, Proc. 21st EU PVSEC, Dresden, 651, 2006

 

S. Kleekajai, F. Jiang, M. Stavola, V. Yelundur, K. Nakayashiki, A. Rohatgi, G. Hahn, S. Seren, Concentration and penetration depth of H introduced into crystalline Si by hydrogenation methods used to fabricate solar cells, J. Appl. Phys., 100, 093517, 2006

 

S. Seren, M. Kaes, G. Hahn, A. Gutjahr, A. R. Burgers, A. Schönecker, Efficiency Potential of RGS Silicon from current R&D Production, Proc. 22nd EU PVSEC, Milan, 854, 2007 (Oral Presentation)

 

S. Seren, G. Hahn, C. Demberger, H. Nagel, Fast illuminated Lock-In Thermography: an Inline Shunt Detection Measurement Tool, Proc. 33rd IEEE PVSC, San Diego, 2008

 

J. Junge, M. Kaes, D. Groetschel, A. Zuschlag, G. Hahn, A. Metz, Advanced Processing Steps for high Efficiency Solar Cells based on EFG Material, Proc. 33rd IEEE PVSC, San Diego, 2008

 

A. Zuschlag, G. Micard, J. Junge, M. Käs, S. Seren, G. Hahn, G. Coletti, G. Jia, W. Seifert, Investigations on the Recombination Activity of Grain Boundaries in mc Silicon, Proc. 33rd IEEE PVSC, San Diego, 2008

 

S. Seren, M. Käs, G. Hahn, H. Nagel, Shunt Detection with illuminated Lock-In Thermography on Inline Relevant Time Scales, Proc. 23rd EU PVSEC, Valencia, 1746, 2008

 

U. Hess, T. Lauermann, S. Seren, G. Hahn, A. Schönecker, Impact of the Crystal Structure on Solar Cell Parameters of Ribbon Growth on Substrate (RGS) Solar Cells, Proc. 23rd EU PVSEC, Valencia, 1522, 2008

 

A. Zuschlag, G. Micard, J. Junge, M. Käs, S. Seren, G. Hahn, G. Coletti, G. Jia, W. Seifert, Extraction of the Surface Recombination Velocity and Diffusion Length from LBIC and EBIC Measurements at Grain Boundaries in mc Silicon, Proc. 23rd EU PVSEC, Valencia, 1915, 2008

 

G. Micard, S. Seren, G. Hahn, Quantitative Interpretation of Light Beam Induced Current Contrast Profiles for differing Diffusion Lengths on either side of a Grain Boundary, Proc. 23rd EU PVSEC, Valencia, 416, 2008

 

J. Junge, M. Kaes, A. Zuschlag, S. Seren, G. Hahn, A. Metz, Laser Fired Contacts for High Efficiency Solar Cells based on EFG Material, Proc. 23rd EU PVSEC, Valencia, 1561, 2008

 

G. Beaucarne, J. John, P. Choulat, Y. Ma, R. Russel, I.G. Romijn, A.W. Weeber, M. Hofmann, R. Preu, A. Slaoui, N. Le Quang, O. Nichiporuk, C. del Cañizo, A. Pan, H.J. Solheim, J. Evju, H. Nagel, J. Horzel, B. Bitnar, M. Heemeier, T. Weber, B. Raabe, H. Haverkamp, C. Strümpel, J. Junge, S. Riegel, S. Seren, G. Hahn, Solar Cell Process Development in the European Integrated Project CrystalClear, Proc. 23rd EU PVSEC, Valencia, 958, 2008

 
A. Schönecker, A. Gutjahr, A.R. Burgers, S. Seren, G. Hahn, Compatibility of the RGS Silicon Wafer with industrial type Solar Cell Processing, Proc. COMMAD (Conference on Optoelectronics and Microelectronic Materials and Devices), Sydney 2008
 
S. Braun, B. Raabe, D. Kohler, S. Seren, G. Hahn, Comparison of Buried Contact- and Screen Printed 100% UMG Solar Cells resulting in 16.2% Efficiency, Proc. 24th EU PVSEC, Hamburg, 1736, 2009
 
U. Hess, S. Joos, S. Seren, G. Hahn, P.-Y. Pichon, A. Schönecker, T. Weber, Infrared Microscopy Investigation of Crystal Structure of Ribbon Growth on Substrate (RGS) Solar Cells, Proc. 24th EU PVSEC, Hamburg, 2138, 2009
 
J. Junge, A. Herguth, S. Seren, G. Hahn, Reducing the Impact of Metal Impurities in block-cast mc Silicon, Proc. 24th EU PVSEC, Hamburg, 1131, 2009
 
D. Kohler, B. Raabe, S. Braun, S. Seren, G. Hahn, Upgraded Metallurgical-Grade Silicon Solar Cells: A Detailed Material Analysis, Proc. 24th EU PVSEC, Hamburg, 1758, 2009
 
G. Micard, S. Seren, G. Hahn, Quantitative Interpretation of Light Beam Induced Current Contrast Profiles: Evaluating the Influence of a near Grain Boundary, Proc. 24th EU PVSEC, Hamburg, 46, 2009
 
A. Zuschlag, J. Junge, S. Seren, G. Hahn, Evaluation of Processing Steps regarding Lifetime of Iron/Copper contaminated mc Si Wafers, Proc. 24th EU PVSEC, Hamburg, 2152, 2009
 
A. Zuschlag, S. Ohl, H. Morhenn, J. Junge, J. Ebser, S. Seren, G. Hahn, µXRF investigations on the influence of solar cell processing steps on iron and copper precipitates in multicrystalline silicon Proc. 35th IEEE PVSC, Hawaii, 2010
 
J. Ebser, J. Junge, T. Lüder, S. Seren, G. Hahn, Al2O3 Rear Surface Passivation for Silicon Ribbon Solar Cells, Proc. 25th EU PVSEC, Valencia, 2010
 
S. Graf, J. Junge, S. Seren, G. Hahn, Emitter Optimization in Mono- and Multicrystalline Silicon: A Study of Emitter Saturation Currents, Proc. 25th EU PVSEC, Valencia, 2010
 
U. Hess, S. Joos, S. Seren, G. Hahn, T. Weber, A. Schönecker, Dielectric Rear Side Passivation on Ribbon Growth on Substrate (RGS) Solar Cells, Proc. 25th EU PVSEC, Valencia, 2010
 
S. Joos, U. Hess, S. Seren, G. Hahn, T. Weber, A. Schönecker, Stacked PECVD Backside Passivation Dielectrics: The Future / Next Step of Industrial Type Screen Printed Silicon Solar Cells, Proc. 25th EU PVSEC, Valencia, 2010
 
J. Junge, J. Ebser, S. Seren, B. Terheiden, G. Hahn, Evaluating the efficiency limits of low cost mc Si materials using advanced solar cell processes, Proc. 25th EU PVSEC, Valencia, 2010
 
D. Kohler, B. Raabe, S. Seren, D. Kiliani, G. Hahn, Comparison of UMG materials: Are Ingot height independent cell efficiencies possible?, Proc. 25th EU PVSEC, Valencia, 2010
 
S. Gindner, J. Junge, S. Seren, G. Hahn, Texturing of String Ribbon Silicon Wafers, Proc. 25th EU PVSEC, Valencia, 2010
 
A. Zuschlag, H. Morhenn, J. Bernhard, J. Junge, S. Seren, G. Hahn, Microscopic analysis of the influence of solar cell process steps on the recombination activity of extended crystal defects, Proc. 25th EU PVSEC, Valencia, 2010
 
G. Micard, S. Seren, G. Hahn, Quantitative interpretation of light beam induced current contrast profiles: Back side surface influence, Proc. 25th EU PVSEC, Valencia, 2010

 

G. Micard, G. Hahn, A. Zuschlag, S. Seren, and B. Terheiden, Quantitative evaluation of grain boundary activity in multicrystalline semiconductors by light beam induced current: An advanced model, J. Appl. Phys., 108, 034516, 2010

 
S. Gindner, A. Dastgheib-Shirazi, J. Junge, S. Seren, G. Hahn, Influence of Diffusion Parameters on electronic Quality of mc Silicon, Proc. 26th EU PVSEC, Hamburg, 2011
 
U. Hess, S. Joos, S. Seren, G. Hahn, T. Weber, P.-Y. Pichon, A. Schönecker, First Ribbon Growth on Substrate (RGS) Solar Cells with selective Emitter, Proc. 26th EU PVSEC, Hamburg, 2011
 
D. Kohler, D. Kiliani, B. Raabe, S. Seren, G. Hahn, Characterization of Dislocation Clusters in UMG-Si Solar Cells, Proc. 26th EU PVSEC, Hamburg, 2011
 
A. Schönecker, S. Seren, L. Laas, M. den Heijer, B. Kraaijveld, Silicon Ribbon Materials: Entering the Market or Eternal Promise?, Proc. 26th EU PVSEC, Hamburg, 2011
 
N. Ximello, J. Junge, S. Seren, G. Hahn, E. Epple, Up to 20% efficient solar cells on monocrystalline silicon wafers by using a KOH - high boiling alcohol (HBA) texturing solution, Proc. 26th EU PVSEC, Hamburg, 2011
 
P. Keller, J. Junge, Y.P. Botchak, F. de Moro, S. Seren, G. Hahn, Over 14% Efficiency on RST-Ribbon Solar Cells, Proc. 27th EU PVSEC, Frankfurt, 2012
 
D. Kohler, A. Zuschlag, S. Seren, G. Hahn, On the Formation of Defect Clusters in mc Silicon Solar Cells, Proc. 27th EU PVSEC, Frankfurt, 2012
 
S. Joos, A. Herguth, U. Hess, J. Ebser, S. Seren, B. Terheiden, G. Hahn, Light Induced Curing (LIC) of Passivation Layers deposited on Native Silicon Oxide, Proc. 2nd SiliconPV, Leuven, 2012
 
Magazins
 
Energietechnologie aktuell, 2010 (Neue Silizium-Materialien für die Photovoltaik, Dr. Sven Seren)
 
Photovoltaics International, 2011 (D. Kohler, S. Seren, B. Raabe, Return of UMG-Si: a new hope)
 
Galvanotechnik, 2011 (N. Ximello, J. Junge, S. Seren, G. Hahn, E. Epple, Vacuum enhanced process for texturization of monocrystalline silicon wafers)
 
Photovoltaics International, 2012 (J.N. Ximello-Quiebras, J. Junge, S. Seren, G. Hahn, E. Epple, Texturing Solutions)