Journalbeiträge

Jahr 2019

C. Derricks, O. Romer, T. Pernau, G. Hahn, A. Herguth
Industrially applicable mitigation of BO-LID in Cz-Si PERC-type solar cells within a coupled fast firing and halogen lamp based belt-line regenerator - A parameter study
Solar Energy Materials and Solar Cells 195, 358-366 (2019)

A. Herguth
On the lifetime-equivalent defect density: Properties, application, and pitfalls
IEEE Journal of Photovoltaics (2019), im Druck 

Jahr 2018

P.P. Altermatt, Z. Xiong, Q. He, W. Deng, F. Ye, Y. Yang, Y. Chen, Z. Feng, P.J. Verlinden, A. Liu, D.H. Macdonald, T. Luka, D. Lausch, M. Turek, C. Hagendorf, H. Wagner-Mohnsen, J. Schön, W. Kwapil, F. Frühauf, O. Breitenstein, E.E. Looney, T. Buonassisi, D.B Needleman, C.M. Jackson, A.R. Arehart, S.A. Ringel, K.R. McIntosh, M.D. Abbott, B.A. Sudbury, A. Zuschlag, C. Winter, D. Skorka, G. Hahn, D. Chung, B. Mitchell, P. Geelan-Small, T. Trupke
High-performance p-type multicrystalline silicon (mc-Si): its characterization and projected performance in PERC solar cells
Solar Energy 175, 68-74 (2018)

A. Graf, A. Herguth, G. Hahn
Investigation on the dependence of degradation rate on hole concentration during boron-oxygen related light-induced degradation in crystalline silicon
AIP Advances 8, 085219 (2018)

J. Steffens, M.A. Fazio, D. Cavalcoli, B. Terheiden
Multi-characterization study of interface passivation quality of amorphous sub-stoichiometric silicon oxide and silicon oxynitride layers for photovoltaic applications
Solar Energy Materials and Solar Cells 187, 104-112 (2018)

J. Fichtner, A. Zuschlag, G. Hahn
Gettering efficacy of diffusion processes based on doped APCVD glasses
AIP Conference Proceedings 1999, 130003 (2018)

G. Micard, G. Hahn, B. Terheiden
On the characteristics of the doping profile under local metal contacts
AIP Conference Proceedings 1999, 020019 (2018)

J. Steffens, G. Hahn, B. Terheiden
Towards a fast determination of the hydrogen concentration in thin  passivating a-Si:H layers using GD-OES
AIP Conference Proceedings 1999, 020021 (2018)

C. Derricks, A. Herguth, G. Hahn, O. Romer, T. Pernau
Elimination of BO-LID in mass production using illuminated annealing in  a coupled firing and regeneration tool
AIP Conference Proceedings 1999, 130002 (2018)

J. Lindroos, A. Zuschlag, J. Carstensen, G. Hahn
Light-induced degradation variation in industrial multicrystalline PERC  silicon solar cells
AIP Conference Proceedings 1999, 130013 (2018)

D. Skorka, A. Zuschlag, G. Hahn
Firing and gettering dependence of effective defect density in material  exhibiting LeTID
AIP Conference Proceedings 1999, 130015 (2018)

C. Winter, A. Zuschlag, D. Skorka, G. Hahn
Influence of dielectric layers and thermal load on LeTID
AIP Conference Proceedings 1999, 130020 (2018)

A. Herguth, P. Keller, N. Mundhaas
Influence of temperature on light induced phenomena in multicrystalline silicon
AIP Conference Proceedings 1999, 130007 (2018)

A. Herguth, B. Hallam
A generalized model for boron-oxygen related light induced degradation in crystalline silicon
AIP Conference Proceedings 1999, 130006 (2018)

M.A. Jensen, A. Zuschlag, D. Skorka, S. Wieghold, A.E. Morishige, G.  Hahn, T. Buonassisi
Evaluating root cause: the distinct roles of hydrogen and firing in  activating light- and elevated-temperature induced degradation
Journal of Applied Physics 124(8) 085701 (2018)

J. Fichtner, H. Zunft, A. Zuschlag, H. Knauss, G. Hahn
Gettering efficacy of APCVD based process steps for low cost PERT-type  multicrystalline silicon solar cells
IEEE Journal of Photovoltaics, 8(6), 1464-1469 (2018)

D. Sperber, A. Schwarz, A. Herguth, G. Hahn
Enhanced stability of passivation quality on diffused silicon surfaces  under light-induced degradation conditions
Solar Energy Materials and Solar Cells 188, 112–118 (2018)

D. Sperber, A. Herguth, G. Hahn
On improved passivation stability on highly-doped crystalline and the long-term stability of regenerated Cz-Si
Solar Energy Materials and Solar Cells 185, 277-282 (2018)

A. Peral, A. Youssef, A. Dastgheib-Shirazi, A. Akey, I.M. Peters, G. Hahn, T. Buonassisi, C. del Canizo
Electrically-inactive phosphorus re-distribution during low temperature annealing
Journal of Applied Physics  123 (16), 161535 (2018)

B. Hallam, A. Herguth, P. Hamer, N. Nampalli, S. Wilking, M. Abbott, S. Wenham, G. Hahn
Eliminating light-induced degradation in commercial p-type Czochralski silicon solar cells
Applied Sciences 8(1), 10 (2018)

A. Herguth, C. Derricks, D. Sperber
A detailed study on light-induced degradation of Cz-Si PERC-type solar cells: evidence of rear surface-related degradation
IEEE Journal of Photovoltaics 2018

A. Herguth, C. Derricks, D. Sperber
Evidence of rear surface related degradation in Cz-Si-type solar cells
IEEE Journal of Photovoltaics 2018

D. Sperber, A. Schwarz, A. Herguth, G. Hahn
Bulk and surface related degradation in lifetime samples made of Czochralski silicon passivated by plasma-enhanced chemical vapor deposited layer stacks
Physica Status Solidi A 215(24), 1800741 (2018)

Jahr 2017

A. Zuschlag, D. Skorka, G. Hahn
Degradation and regeneration in mc-Si after different gettering steps
Progress in Photovoltaics: Research and Applications  25(7), 545-552 (2017)

D. Sperber, A. Herguth, G. Hahn
A 3-state defect model for light induced degradation in boron-doped float-zone silicon
Physica Status Solidi (RRL) - Rapid Research Letters 11(3), 1600408 (2017)

D. Sperber, A. Graf, D. Skorka, A. Herguth, G. Hahn
Degradation of surface passivation and its impact on light induced degradation experiments
IEEE  Journal of Photovoltaics 7(6), 1627-1634 (2017)

D. Sperber, A. Heilemann, A. Herguth, G. Hahn
Temperature and light induced changes in bulk and passivation quality of boron-doped float-zone silicon coated with SiNx:H
IEEE Journal of Photovoltaics 7(2), 463-470 (2017)

A. Peral, A. Dastgheib-Shirazi, V. Fano, J.C. Jimeno, G. Hahn, C. del Canizo
Impact of extended contact cofiring on multicrystalline silicon solar cell parameters
IEEE Journal of Photovoltaics  7(1), 91-96 (2017)

G. Micard, D. Sommer, G. Hahn, B. Terheiden
Extraction of individual components of series resistance using TCAD simulations meeting the requirements of 2- and 3-dimensional carrier flow of IBC solar cells
Energy Procedia  124, 113-119 (2017)

 J. Steffens, H.-W. Becker, S. Gerke, S. Joos, G. Hahn, B. Terheiden
Replacing NRA by fast GD-OES measurements as input to a model based prediction of hydrogen diffusion in a-Si
Energy Procedia 124, 180-187 (2017)

 J.M. Fritz, A. Zuschlag, D. Skorka, A. Schmid, G. Hahn
Temperature dependent degradation and regeneration of differently doped mc-Si materials
Energy Procedia  124, 718-725 (2017)

D. Sperber, A. Graf, A. Heilemann, A. Herguth, G. Hahn
Bulk and surface instabilities in boron doped float-zone samples during light induced degradation treatments
Energy Procedia  124, 794-798 (2017)

Jahr 2016

S. Gerke, G. Micard, R. Job, G. Hahn, B. Terheiden
Capacitance-voltage spectroscopy and analysis of dielectric intrinsic amorphous silicon thin films
Physica Status Solidi C  13/10-12, 724-728 (2016)

J. Engelhardt, G. Fitzky, G. Hahn and B. Terheiden
Study on the characteristics of ICP-PECVD boron silicate glasses dependent on diborane flux
ECS J. Solid State Sci. Technol. 2016 volume 5, issue 10, N81-N89

A. Dastgheib-Shirazi, J. Rinder, M. Steyer, B. Terheiden, G. Hahn
Enhanced oxidation of thermally grown SiO2 due to p-precipitates
Energy Procedia 92, 457-465 (2016)

A. Frey, S. Fritz, J. Engelhardt, G. Hahn, B. Terheiden
Influence of contact firing conditions on the characteristics of bi-facial n-type silicon solar cells using Ag/Al pastes
Energy Procedia 92, 919-924 (2016)

S. Fritz, E. Emre, J. Engelhardt, S. Ebert, N. Nowak, J. Booth, G. Hahn
Contacting BBr3-based boron emitters with Al-free screen-printing paste
Energy Procedia 92, 925-931 (2016)

A. Herguth
Finite element simulation of the local Al/Si contact formation
Energy  Procedia 92, 75–81 (2016)

R. Horbelt, G. Micard, P. Keller, G. Hahn, R. Job, B. Terheiden
Surface recombination velocity of local Al-contacts of PERC cells determined from LBIC measurements and 2D Simulation
Energy Procedia 92, 82-87 (2016)

D. Sperber, A. Herguth, G. Hahn
Instability of dielectric surface passivation quality at elevated temperature and illumination
Energy Procedia 92, 211-217 (2016)

B. Terheiden
CVD boron containing glasses - an attractive alternative diffusion source for high quality emitters and simplified processing -  A review 
Energy Procedia 92, 486 – 492 (2016)

R. Horbelt, S. Ebert. V. Ulbikaite, G. Hahn, R. Job, B. Terheiden
Al-density variation as one driving force for void formation in PERC solar cells
Physica Status Solidi (RRL) - Rapid Research Letters 10(7) 515-519 (2016)

A. Herguth, S. Wilking, G. Hahn
Solarmodul auf der Sonnenbank 
elektronik informationen 6, 52-54 (2016), AT-Fachverlag GmbH & Co. KG
http://www.elektronik-informationen.de/

A. Frey, J. Engelhardt, G. Micard, G. Hahn, B. Terheiden
Investigation of fill factor losses on 20.2% efficient n-type mono-like silicon solar cells with laser contact opening
Phys. Status Solidi RRL 10, No. 2, 143–147 (2016)

 S. Gloger, A. Herguth, J. Engelhardt, G. Hahn, B. Terheiden
A 3-in-1 doping process for interdigitated back contact solar cells exploiting the understanding of co-diffused dopant profiles by use of PECVD borosilicate glass in a phosphorus diffusion
Prog. Photovolt: Res. Appl. (2016)

S. Gerke, H.-W. Becker, D. Rogalla, F. Singer, N. Brinkmann, S. Fritz, A. Hammud, P. Keller, D. Skorka, D. Sommer, C. Weiß, S. Flege, G. Hahn, R. Job, B. Terheiden
Influence of post-hydrogenation upon electrical, optical and structural properties of hydrogen-less sputter-deposited amorphous silicon
Thin Solid Films 598, 161-169 (2016)

S. Fritz, S. Riegel, H. Deniz, G. Hahn
Crystalline nature of metal spikes and silicon inclusions in Ag/Al screen-printing metallization
IEEE Journal of Photovoltaics 6(1), 79-85 (2016)

K. Dressler, M. Kratt, P. Voss, S. Riegel, A. Herguth, G. Hahn
Influence of Al particle size and firing profile on void formation in rear local contacts of silicon solar cells
IEEE Journal of Photovoltaics 6(1), 68-73 (2016)

Y.P. Botchak Mouafi, A. Zuschlag, P.-Y. Pichon, J.M. Fritz, A. Schönecker, G. Hahn
Novel RGS materials with high fill factors and no material-induced shunts with record solar cells efficiencies exceeding 16%
Solar Energy Materials and Solar Cells 146, 25-34 (2016)

G. Micard, G. Hahn, B. Terheiden
Injection in light beam induced current systems: An analytical model
Physica Status Solidi A 213(5), 1329-1339 (2016)

R. Horbelt, G. Micard, P. Keller, G. Hahn, R. Job, B. Terheiden
Characterization of local Al-contacts by LBIC measurements and their verification by 2D simulation using flex-PDE
Physica Status Solidi A 213(5), 1317-1323 (2016)

S. Fritz, J. Engelhardt, S. Ebert, G. Hahn
Contacting boron emitters on n-type silicon solar cells with aluminium-free silver screen-printing pastes
Physica Status Solidi - Rapid Research Letters 10(4), 305-309 (2016)

J. Ebser, D. Sommer, S. Fritz, Y. Schiele, G. Hahn, B. Terheiden 
p+-doping analysis of laser fired contacts for silicon solar cells by Kelvin probe force microscopy
Journal of Applied Physics 119(10), 105707 (2016)

H. Wagner, A. Dastgheib-Shirazi, B. Min, A.E. Morishige, M. Steyer, G. Hahn, C. del Cañizo, T. Buonassisi, P.P. Altermatt
Optimizing phosphorus diffusion for photovoltaic applications: Peak doping, inactive phosphorus, gettering, and contact formation
Journal of Applied Physics 119, 185704 (2016)

 G. Hahn, S. Joos
Industrielle Herstellung von Silizium-Solarzellen - Marktführer mit Zukunft
Physik in unserer Zeit 47(5) 240-246 (2016)

Jahr 2015

R. Horbelt, G. Hahn, R. Job, B. Terheiden
Void formation on PERC solar cells and their impact on the electrical cell parameters verified by luminescence and scanning acoustic microscope measurements
Energy Procedia 84, 47-55 (2015)

S. Gerke, H.W. Becker, D. Rogalla, G. Hahn, R. Job, B. Terheiden
About nuclear resonant reaction analysis for hydrogen investigations in amorphous silicon
Energy Procedia 84, 105-109 (2015)

S. Gerke, G. Hahn, R. Job, B. Terheiden
Bias-plasma assisted RF magnetron sputter deposition of hydrogen less amorphous silicon
Energy Procedia 84, 99-104 (2015)

S. Fritz, G. Hahn, A. Herguth, S. Riegel
Influence of Si surface oreintation on screen-printed Ag/Al contacts
Energy Procedia 77, 581-585 (2015)

M. Steyer, A. Dastgheib-Shirazi, G. Hahn, B. Terheiden
New method for determination of electrically inactive phosphorus in n-type emitters
Energy Procedia 77, 316-320 (2015)

A. Gorgulla, D. Ertel, G. Hahn, M. Steyer, B. Terheiden
Effect of Zn and Al concentrations analyzed by ICP-OES on the properties of co-sputtered ZnO:Al films
Energy Procedia 77, 687-693 (2015)

J. Engelhardt, G. Hahn, B. Terheiden
Multifunctional ICP-PECVD silicon nitride layers for silicon solar cell applications
Energy Procedia 77, 786-790 (2015)

A. Zuschlag, G. Hahn, D. Kohberger
3D-FIB investigation of Cu precipitates in c-Si after high temperature treatments
Energy Procedia 77, 238-241 (2015)

A. Herguth, G. Hahn, R. Horbelt, R. Job, S. Wilking
Comparison of BO regeneration dynamics in PERC and Al BSF solar cells
Energy Procedia 77, 75-82 (2015)

S. Gerke, H. Becker, G. Hahn, R. Job, D. Rogalla, B. Terheiden
Morphology and hydrogen in passivating amorphous silicon layers
Energy Procedia 77, 791-798 (2015)

G. Hahn, S. Wilking, A. Herguth
BO-related defects: overcoming bulk lifetime degradation in crystalline Si by regeneration
Solid State Phenomena 242, 80-89 (2016)

A. Dastgheib-Shirazi, G. Hahn, G. Micard, A. Peral, M. Steyer, H. Wagner
Dissolution of electrically inactive phosphorus by low temperature annealing
Energy Procedia 77, 286-290 (2015)

A. Peral, A. Dastgheib-Shirazi, H. Wagner, G. Hahn, C. del Cañizo
Effect of electrically inactive versus electrically active phosphorus on iron gettering
Energy Procedia 77, 311-315 (2015)

B. Albrecht, P. Keller, F. De Moro, G. Hahn
Improvement of Voc for thin RST solar cells by enhanced back side passivation
Energy Procedia 77, 848-854 (2015)

Y.P. Botchak Mouafi, A. Zuschlag, P.-Y. Pichon, A. Schönecker, G. Hahn
Efficiencies above 16% on novel quasi-mono RGS material
Energy Procedia 77, 863-870 (2015)

J. Engelhardt, A. Frey, S. Gloger, G. Hahn,  B. Terheiden
Passivating boron silicate glasses for co-diffused high-efficiency n-type silicon solar cell application
Appl. Phys. Lett. 107, 042102 (2015)

K. Dressler, M. Rauer, M. Kaloudis, S. Dauwe, A. Herguth, G. Hahn
Nondestructive characterization of voids in rear loacal contacts of PERC-type solar cells
IEEE Journal of Photovoltaics 5(1), 70-76 (2015)

S. Fritz, M. König, S. Riegel, A. Herguth, M. Hörteis, G. Hahn
Formation of Ag/Al screen-printing contacts on B emitters
IEEE Journal of Photovoltaics 5(1), 145-151 (2015)

T. Lauermann, B. Fröhlich, G. Hahn, B. Terheiden
Diffusion-based model of local Al back surface field formation for industrial passivated emitter and rear cell solar cells
Progress in Photovoltaics: Research and Application 23(1), 10-18 (2015)

B. Terheiden, T. Ballmann, R. Horbelt, Y. Schiele, S. Seren, J. Ebser, G. Hahn, V. Mertens, M.B. Koentopp, M. Scherff, J.W. Müller, Z.C. Holman, A. Descoeudres, S. De Wolf, S.M. de Nicolas, J. Geissbuehler, C. Ballif, B. Weber, P. Saint-Cast, M. Rauer, C. Schmiga, S.W. Glunz, D.J. Morrison, S. Devenport, D. Antonelli, C. Busto, F. Grasso, F. Ferrazza, E. Tonelli, W. Oswald
Manufacturing 100-µm-thick silicon solar cells with efficiencies greater than 20% in a pilot production line
Physica Status Solidi A: Applications and Materials Science 212(1), 13-24 (2015)

E. Zimmermann, T. Pfadler, J. Kalb, J.A. Dorman, D. Sommer, G. Hahn, J. Weickert, L. Schmidt-Mende
Toward high-efficiency solution-processed planar heterojunction Sb2S3 solar cells
Advanced Science, 1500059 (2015)

S. Fritz, S. Riegel, A. Herguth, M. König, M. Hörteis, G. Hahn
Preservation of Si surface structure by Ag/Al contact spots – an explanatory model
Energy Procedia 67, 43-48 (2015)

S. Wilking, M. Forster, A. Herguth, G. Hahn
From simulation to experiment: understanding BO-regeneration kinetics
Solar Energy Materials and Solar Cells 142,  87–91 (2015)

M. Perani, N. Brinkmann, A. Hammud, D. Cavalcoli, B. Terheiden
Nanocrystal formation in silicon oxy-nitride films for photovoltaic applications: optical and electrical properties
J. Phys. Chem. C, 119 (24), 13907–13914 (2015)

D. Li, S. Wittmann, T. Kunz, T. Ahmad, N. Gawehns, M. T. Hessmann, J. Ebser, B. Terheiden, R. Auer, C. J. Brabec
Recrystallized thin-film silicon solar cell on graphite substrate with laser single side contact and hydrogen passivation
European Physical Journal in Photovoltaics, 6, 60301 (2015)

Jahr 2014

G. Hahn, S. Joos
State-of-the-art industrial crystalline silicon solar cells
Semiconductors and Semimetals, Advances in Photovoltaics: Vol. 3. 1-72 (2014)

J. Engelhardt, A. Frey, L. Mahlstaedt, S. Gloger, G. Hahn, B. Terheiden
Boron emitters from doped PECVD layers for n-type crystalline silicon solar cells with LCO
Energy Procedia, Volume 55, 2014, 235-240 (2014)

S. Joos, Y. Schiele, B. Terheiden, G. Hahn, H.W. Becker, D. Rogalla
Fundamental studies of hydrogen at the silicon / silicon nitride interface
Energy Procedia, Volume 55, 2014, 786-790 (2014)

Y. Schiele, S. Joos, G. Hahn, B. Terheiden
Etch-back of p+ structures for selective boron emitters in n-type c-Si solar cells
Energy Procedia, Volume 55, 2014, 295-301 (2014)

D.P. Fenning, J. Hofstetter, A.E. Morishige, D.M. Powell, A. Zuschlag, G. Hahn, T. Buonassisi
Darwin at high temperature: advancing solar cell material design using defect kinetics simulations and evolutionary optimization
Advanced Energy Materials 4(13), 1400459 (2014)

S. Gindner, P. Karzel, B. Herzog, G. Hahn
Efficacy of phosphorus gettering and hydrogenation in multicrystalline silicon
IEEE Journal of Pyhotovoltaics 4(4), 1063-1070 (2014)

D.P. Fenning, A.S. Zuschlag, J. Hofstetter, A. Frey, M.I. Bertoni, G. Hahn, T. Buonassisi
Investigation of lifetime-limiting defects after high-temperature phosphorus diffusion in high-iron content multicrystalline silicon
IEEE Journal of Photovoltaics. 4(3), 859-865 (2014)

S. Wilking, A. Herguth, G. Hahn
Influence of bound hydrogen states on BO-regeneration kinetics and consequences for high-speed regeneration processe
Solar Energy Materials and Solar Cells, 131, 2-8 (2014)

N. Brinkmann, A. Gorgulla, A. Bauer, D. Skorka, G. Micard, G. Hahn, B. Terheiden 
Influence of electrodes' distance upon properties of intrinsic and doped amorphous silicon films for heterojunction solar cells
Physica Status Solidi A, 211(5), 1106-1112 (2014)

S. Braun, R. Nissler, C. Ebert, D. Habermann, G. Hahn
High efficiency multi-busbar solar cells and modules
IEEE Journal of Photovoltaics 4(1), 148-153 (2014)

D. Kohler, A. Zuschlag, G. Hahn
On the origin of large defect clusters in multicrystalline silicon solar cells
Solar Energy Materials and Solar Cells 120, 275-281 (2014)

A. Zuschlag, M. Schwab, D. Merhof, G. Hahn
Transition metal precipitates in mc Si: a new detection method using 3D-FIB
Solid State Phenomena 205 - 206, 136-141 (2014)

Jahr 2013

P. Karzel, M. Ackermann, L. Gröner, C. Reimann, M. Zschorsch, S. Meyer, F. Kiessling, S. Riepe, G. Hahn
Dependence of phosphorus gettering and hydrogen passivation efficacy on grain boundary type in multicrystalline silicon
Journal of Applied Physics 114, 244902 (2013)

S. Braun, G. Hahn, R. Nissler, C. Pönisch, D. Habermann
The multi-busbar design: an overview
Energy Procedia 43, 86-92 (2013)

S. Wilking, S. Ebert, A. Herguth, G. Hahn
Influence of hydrogen effusion from hydrogenated silicon nitride layers on the regeneration of boron-oxygen related defects in crystalline silicon
Journal of Applied Physics 114, 194512 (2013)

S. Wilking, A. Herguth, G. Hahn
Influence of hydrogenated passivation layers on the regeneration of boron-oxygen related defects
Energy Procedia 38, 642-648 (2013)

Y. Schiele, S. Wilking, F. Book, T. Wiedenmann, G. Hahn
Record efficiency of PhosTop solar cells from n-type Cz UMG silicon wafers
Energy Procedia 38, 459-466 (2013)

P. Keller, J. Junge, F. de Moro, S. Seren, G. Hahn
PERC solar cells on below 100 µm thick RST silicon ribbon wafers
Energy Procedia 38, 576-581 (2013)

S. Fritz, S. Riegel, S. Gloger, D. Kohler, M. König, M. Hörteis, G. Hahn
Influence of emitter properties on contact formation to p+ silicon
Energy Procedia 38, 720-724 (2013)

J. Engelhardt, S. Ohl, G. Hahn, B. Terheiden
Correlation of stress in silicon nitride layers with their complete removal by laser ablation
Energy Procedia 38, 707-712 (2013)

A. Dastgheib-Shirazi, M. Steyer, G. Micard, H. Wagner, P.P. Altermatt, G. Hahn
Relationships between diffusion parameters and phosphorus precipitation during the POCl3 diffusion process
Energy Procedia 38, 254-262 (2013)

S. Braun, G. Hahn, R. Nissler, C. Pönisch, D. Habermann
Multi-busbar solar cells and modules: high efficiencies and low silver consumption
Energy Procedia 38, 334-339 (2013)

U. Hess, P.Y. Pichon, S. Seren, A. Schoenecker, G. Hahn
Crystal defects and their impact on Ribbon Growth on Substrate (RGS) silicon solar cells
Solar Energy Materials and Solar Cells 117, 471-475 (2013)

T. Lauermann, B. Fröhlich, G. Hahn, B. Terheiden
Diffusion-based model of local Al back surface field formation for industrial passivated emitter and rear cell solar cells
Progress in Photovoltaics: Research and Applications 23, 10-18 (2015)

D.P. Fenning, A.S. Zuschlag, M.I. Bertoni, B. Lai, G. Hahn, T. Buonassisi
Improved iron gettering of contaminated multicrystalline silicon by high-temperature phosphorus diffusion
Progress in Photovoltaics: Research and Applications  113, 214504 (2013)

P. Karzel, A. Frey, S. Fritz, G. Hahn
Influence of hydrogen on interstitial iron concentration in multicrystalline silicon during annealing steps
Progress in Photovoltaics: Research and Applications  113, 114903 (2013)

S. Wilking, A. Herguth, G. Hahn
Influence of hydrogen on the regeneration of boron-oxygen related defects in crystalline silicon
Progress in Photovoltaics: Research and Applications 113, 194503 (2013)

N. Brinkmann, G. Micard, Y. Schiele, G. Hahn, B. Terheiden
Free energy loss analysis of heterojunction solar cells
Physica Status Solidi (RRL) -  Rapid Research Letters, 7(5), 322-325 (2013)

N. Brinkmann, D. Sommer, G. Micard, G. Hahn, B. Terheiden
Electrical, optical and structural investigation of plasma-enhanced chemical-vapor-deposited amorphpos silicon oxynitride films for solar cell applications
Sol. Energy Mat Sol Cells, 108 (2013)

T. Kunz, M. T. Hessmann, S. Seren, B. Meidel, B. Terheiden, C. J. Brabec 
Dopant mapping in highly p-doped silicon by micro-Raman spectroscopy at various injection levels
Progress in Photovoltaics: Research and Applications 113, 023514 (2013)

Jahr 2012

K.L. Pollock, J. Junge, G. Hahn
Detailed investigation of surface passivation methods for lifetime measurements on silicon wafers
IEEE Journal of Photovoltaics 2(1), 1-6 (2012)

D. Kiliani, A. Herguth, G. Micard, J. Ebser, G. Hahn
Time-resolved photoluminescence imaging with electronic shuttering using an image intensifier unit
Solar Energy Materials and  Solar Cells, 55-59 (2012)

Y. Schiele, F. Book, S. Seren, G. Hahn, B. Terheiden
Screen-printed Al-alloyed rear junction solar cell concept applied to very thin (100 µm) large area n-type Si wafers
Energy Procedia 27, 460-466 (2012)

T. Lüder, T. Lauermann, A. Zuschlag, G. Hahn, B. Terheiden
Al2O3/SiNx-stacks at increased temperatures: avoiding blistering during contact firing
Energy Procedia 27, 426-431 (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
Energy Procedia 27, 349-354 (2012)

S. Braun, G. Micard, G. Hahn
Solar cell improvement by using a multi busbar desgin as front electrode
Energy Procedia 27, 227-233 (2012)

S. Riegel, F. Mutter, T. Lauermann, B. Terheiden, G. Hahn
Review on screen printed metallization on p-type silicon
Energy Procedia 21, 14–23 (2012)

Jahr 2011

S. Gloger, N. Brinkmann, B. Terheiden
Low surface recombination velocity using amorphous silicon on industrial-type cleaned surfaces
Energy Procedia 8, 666-671 (2011)

S. Riegel, F. Mutter, G. Hahn, B. Terheiden
Influence of the dopant on the contact formation to p+-type silicon
Energy Procedia 8, 533-539 (2011)

T. Lüder, G. Hahn, B. Terheiden
Passivation of Si wafers by Al2O3 films with different surface conditioning
Energy Procedia 8, 660-665 (2011)

J. Junge, A. Herguth, G. Hahn, D. Kreßner-Kiel, R. Zierer
Investigation of degradation in solar cells from different mc-Si materials
Energy Procedia 8, 52-57 (2011) 

S. Braun, A. Zuschlag, B. Raabe, G. Hahn
The origin of background plating
Energy Procedia 8, 565-570 (2011)

F. Book, T. Wiedenmann, G. Schubert, H. Plagwitz, G. Hahn
Influence of the front surface passivation quality on large area n-type silicon solar cells with Al-alloyed emitter
Energy Procedia 8, 487-492 (2011)

D. Kiliani, G. Micard, B. Steuer, B. Raabe, A. Herguth, G. Hahn
Minority charge carrier lifetime mapping of crystalline silicon wafers by time-resolved photoluminescence imaging
Journal of  Applied Physics 110, 054508 (2011)

G. Colletti, P.C.P Bronsveld, G. Hahn, W. Warta, D. Macdonald, B. Ceccaroli, K. Wambach, N. Le Quang, J.M. Fernandez
Impact of metal contamination in silicon solar cells
Advanced Functional Materials 21, 879-890 (2011)

M.I. Bertoni, S. Hudelson, B.K. Newman, S. Bernardis, D.P. Fenning, H.F.W. Dekkers, E. Cornagliotti, A. Zuschlag, G. Micard, G. Hahn, G. Coletti, B. Lai, T. Buonassisi
Influence of defect type on hydrogen passivation efficacy in multicrystalline silicon solar cells
Progress in Photovoltaics: Research and Applications 19(2) 187-191 (2011)

Jahr 2010

A. Herguth, G. Hahn
Kinetics of the boron-oxygen related defect in theory and experiment
Journal of Applied Physics 108, 114509 1-7 (2010)

V. Ganapati, S. Schoenfelder, S. Castellanos, S. Oener, R. Koepge, A. Sampson, M.A. Marcus, B. Lai, H. Morhenn, G. Hahn, J. Bagdahn, T. Buonassisi
Infrared birefringence imaging of residual stress and bulk defects in multicrystalline silicon
Journal of Applied Physics 108, 063528 1-13 (2010)

G. Micard, G. Hahn, A. Zuschlag, S. Seren, B. Terheiden
Quantitative evaluation of grain boundary activity in multicrystalline semiconductors by light beam induced current: an advanced model
Journal of Applied Physics 108, 034516 1-13 (2010)

G. Micard, G. Hahn, B. Terheiden, D. Chrastina, G. Isella, T. Moiseev, D. Cavalconi, A. Cavallini, S. Binetti, M. Acciarri, A. Le Donne, M. Texier, B. Pichaud
Electrical and structural properties of p-type nanocrystalline silicon grown by LEPECVD for photovoltaic applications
Physica Status Solidi C 7, No. 3-4 712-715 (2010)

G. Hahn, M. Käs, B. Herzog
Hydrogenation in crystalline silicon materials for photovoltaic application
Solid State Phenomena 156-158, 343-349 (2010)

Jahr 2009

Jahr 2008

A. Herguth, G. Schubert, M. Kaes, G. Hahn
Investigations on the long time behavior of the metastable boron-oxygen complex in crystalline silicon
Progress in  Photovoltaics: Research and Applications 16(2), 135-140, 2008

Jahr 2007

G. Hahn

Neue Materialien der Photovoltaik - Solarzellen aus Folien-Silizium

In: Erneuerbare Energie – Alternative Energiekonzepte für die Zukunft, Herausgeber: T. Bührke, R. Wengenmayr, Wiley (2007)

C. Strümpel, M. J. McCann, G. Beaucarne, V. Arkhipov, A. Slaoui, Svrcek, C. del Canizo and I. Tobias
Modifying the solar spectrum to enhance silicon solar cell efficiency: an overview of available materials
Solar Energy Materials and Solar Cells 91, 238-249, 2007

Jahr 2006

H. Knauss, B. Terheiden, P. Fath
Large-area metallisation wrap through solar cells using electroless plating
Solar Energy Materials and Solar Cells, 90(18) , 3232-3237 (2006)

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

T. Buonassisi, A. A. Istratov, M. D. Pickett, M. Heuer, J. P. Kalejs, G. Hahn, M. A. Marcus, B. Lai, Z. Cai, S. M. Heald, T. F. Ciszek, R. F. Clark, D. W. Cunningham, A. M. Gabor, R. Jonczyk, S. Narayanan, E. Sauar, E. R. Weber
Chemical natures and distributions of metal impurities in multicrystalline silicon materials
Progress in Photovoltaics: Research Applications 14, 513-531 (2006)

Jahr 2005

O. F. Vyvenko, N. V. Bazlov, M. V. Trushin, A. A. Nadolinski, M. Seibt, W. Schroter, G. Hahn
Impact of hydrogenation on electrical properties of NiSi2 precipitates in silicon
Solid State Phenomena 108-109, 279-284 (2005)

T. Buonassisi, A. A. Istratov, M. D. Pickett, M. A. Marcus, G. Hahn, S. Riepe, J. Isenberg, W. Warta, G. Willeke, T. F. Ciszek, E. R. Weber
Quantifying the effect of metal-rich precipitates on minority carrier diffusion length in multicrystalline silicon using snychroton-based spectrally resolved x-ray beam-induced current
Applied Physics Letters  87(1), 1-3 (2005)

P. Geiger, G. Kragler, G. Hahn, P. Fath
Spatially resolved investigations of lifetime enhancement in vertically grown silicon ribbons
Solar Energy Materials and Solar Cells 85, 559-572 (2005)

Jahr 2004

M. Kaes, S. Seren, T. Pernau, G. Hahn
Light-modulated lock-in thermography for photosensitive pn-structures and solar cells
Progress in Photovoltaics: Research and  Applications 12(5), 355-362 (2004)

G. Hahn, A. Schönecker
New crystalline silicon ribbon materials for photovoltaics
Journal of Physics: Condensed Matter 16, R1615-R1648 (2004)

T. Buonassisi, O.F. Vyvenko, A.A. Istratov, E.R. Weber, G. Hahn, D. Sontag, J.P. Rakotoniaina, O. Breitenstein, J. Isenberg, R. Schindler
Observation of transition metals at shunt locations in multicrystalline silicon solar cells
Journal of Applied Physics 95(3) ,1556-1561 (2004)

G. Hahn
Solarzellen aus Folien-Silizium
Physik in unserer Zeit 35(1), 20-27 (2004)

Jahr 2003

G. Hahn, P. Geiger
Record efficiencies for EFG and string ribbon solar cells
Progress in Photovoltics: Research and Applications 11, 341-346 (2003)

Jahr 2002

G. Hahn, P. Geiger, D. Sontag, P. Fath, E. Bucher
Influence of hydrogen passivation on majority and minority charge carrier mobilities in ribbon silicon
Solar Energy Materials and Solar Cells 74, 57-63 (2002)

D. Sontag, G. Hahn, P. Geiger, P. Fath, E. Bucher
Two dimensional resolution of minority carrier diffusion constants in different silicon materials
Solar Energy Materials and Solar Cells 72, 533.539 (2002)

P. Geiger, G. Hahn, P. Fath, E. Bucher
Comparing improved state-of-the-art to former EFG Si-ribbons with respect to solar cell processing and hydrogen passivation
Solar Energy Materials and Solar Cells 72, 155-163 (2002)

G. Hahn, D. Sontag, C. Haessler
Current collecting channels in RGS silicon solar cells - are they useful?
Solar Energy Materials and Solar Cells 72, 453-464 (2002)

Jahr 2001 und älter

G. Hahn, C. Zechner, M. Rinio, P. Fath, G. Willeke, E. Bucher
Enhanced carrier collection observed in mechanically structured silicon with small diffusion length
Journal of Applied Physics 86 (12), 7179-7182 (1999)

M. Spiegel, C. Zechner, B. Bitnar, G. Hahn, W. Jooss, P. Fath, G. Willeke, E. Bucher, H.-U. Höfs, C. Häßler
Ribbon growth on substrate (RGS) silicon solar cells with microwave-induced remote hydrogen plasma passivation and efficiencies exceeding 11 %
Solar  Energy Materials and Solar Cells 55 (4), 331-340 (1998)

G. Hahn, C. Zechner, B. Bitnar, M. Spiegel, W. Jooss, P. Fath, G. Willeke, E. Bucher, H.-U. Höfs
Solar cell with 11 % efficiency on ribbon-growth-on-substrate (RGS) silicon
Progress in Photovoltaics: Research and  Applications 6, 163-167 (1998)

G. Hahn, C. Geng, P. Ernst, H. Schweizer, F. Scholz, F. Phillipp
Investigations on domain boundaries in ordered GaInP using stereo transmission electron microscopy
Superlattices and Microstructures 22 (3), 301-305 (1997)

P. Ernst, C. Geng, G. Hahn, F. Scholz, H. Schweizer, Y. Zhang, A. Mascarenhas
Optical properties of ordered GaInP
Optoelectronic Materials: Ordering, Composition Modulation, and Self-Assembled Structures (MRS Proceedings), (Ed.: E.D. Jones, A. Mascarenhas, P. Petroff), Volume 417, 19-30 (1996)

P. Ernst, C. Geng, G. Hahn, F. Phillipp, F. Scholz, H. Schweizer, A. Mascarenhas
Influence of domain size on optical properties of ordered GaInP
Journal of Applied Physics 79, 2633-2639 (1996)