Journal Papers

Year 2023

Fabian Geml, Benjamin Gapp, Simon Johnson, Patricia Sutton, Angela Goode, Jonathan Booth, Heiko Plagwitz, Giso Hahn
Model for contact formation of novel TeO2 containing Pb-free silver paste on n+ and p+ doped crystalline silicon
EPJ Photovoltaics 14, 8 (2023)

C. Fischer, A. Schmid, A. Herguth, C. Winter, A. Zuschlag, P. Altermatt, G. Hahn
Influence of highly doped layers on hydrogen in-diffusion into crystallie silicon
Solar Energy Materials and Solar Cells 250, 112056 (2023)

J. Simon, R. Fischer-Süßlin, R. Zerfaß, P. Dufke, L. Kutschera, A. Herguth, S. Roder, G. Hahn
Correlation study between LeTID defect density, hydrogen and firing profile in Ga-doped crystalline silicon
Solar Energy Materials and Solar Cells 260, 112456 (2023)

M. Mehler, A. Schmid, A. Zuschlag, M. Trempa, G. Hahn
Influence of the addition of aluminium in boron-doped Cz-Si on degradation and regeneration kinetics
AIP Conference Proceedings 2826, 110006 (2023)

C. Fischer, A. Zuschlag, G. Hahn
Various impacts of firing temperature on crystalline silicon
AIP Conference Proceedings 2826, 110003 (2023)

J. Simon, A. Herguth, G. Hahn
Non-cryogenic infrared absorption spectroscopy for direct boron-hydrogen pair quantification
AIP Conference Proceedings 2826, 030013 (2023)

T. Okker, R. Glatthaar, G. Hahn, S. Seren, B. Terheiden
Influence of firing temperature on APCVD poly-Si properties for fired passivating contacts
AIP Conference Proceedings 2826, 020005 (2023)

F. Geml, S. Sanz, D. Wurmbrand, G. Micard, H. Plagwitz, G. Hahn, B. Terheiden
On the fixed charges in multifunctional doped APCVD layers for well passivated solar cells
AIP Conference Proceedings 2826, 050002 (2023)

Y.P. Botchak Mouafi, G. Micard, J. Mürter, N. Birkle, R. Sorgenfrei, M. Drießen, C. Weiss, B. Terheiden
Increasing robustness of EpiWafer transfer process leading to carrier lifetimes of 1.6 ms using large scale production feasible substrate wafers
AIP Conference Proceedings 2826, 120001 (2023)

G. Micard, Y.P. Botchak Mouafi, B. Terheiden
Non-destructive spatially resolved characterization of porous silicon layer stacks
AIP Conference Proceedings 2826, 120002 (2023)

M. Heilig, D. Wurmbrand, G. Hahn, B. Terheiden
A simplified and masking-free doping process for interdigitated back contact solar cells using an atmospheric pressure chemical vapor deposition borosilicate glass / phosphosilicate glass layer stack for laser doping followed by a high temperature step
Progress in Photovoltaics: Research and Applications 31(6), 607-606 (2023)

R. Zerfaß, J. Simon, A. Herguth, G. Hahn
Impact of hydrogen in Ga-doped silicon on maximum LeTID defect density
Solar Rapid Research Lettters 7(22), 2300501 (2023)

R. Glatthaar, B. Cela Greven, T. Okker, F. Huster, G. Hahn, B. Terheiden
Fundamental microscopic studies on the etching behavior of silver pastes on poly-Si/SiOx passivating contacts
Solar Energy Materials and Solar Cells 261, 112516 (2023)

Year 2022

C. Ballif, F.-J. Haug, M. Boccard, P.J. Verlinden, G. Hahn
Status and perspectives of crystalline silicon photovoltaics in research and industry
Nature Reviews Materials 7, 597-616 (2022)

A. Herguth
Quantification of Iron in Boron-Doped Silicon Solar Cells From Open Circuit Voltage Measurements
IEEE Journal of Photovoltaics 12(4), 937-947 (2022)

J. Simon, A. Herguth, G. Hahn
Quantitative analysis of boron-hydrogen pair dynamics by infrared absorption measurements at room temperature
Journal of Applied Physics 131, 235703 (2022)

J. Linke, R. Glatthaar, F. Huster, T. Okker, S. Möller, G. Hahn, B. Terheiden
Poly-Si thickness and temperature dependent oxide disruption induced by penetration of the interfacial oxide in (p) poly-Si/SiOx passivating contacts
Solar Energy Materials and Solar Cells 246, 111890 (2022)

J. Simon, A. Herguth, L. Kutschera, G. Hahn
The dissociation of gallium-hydrogen pairs in crystalline silicon during illuminated annealing,
Physica Status Solidi – Rapid Research Letters 16(12), 2200297 (2022)

E. Zimmermann, K.K. Wong, T. Seewald, J. Kalb, J. Steffens, G. Hahn, L. Schmidt-Mende
Controlled crystallinity of TiO2 layers grown by atmospheric pressure spatial atomic layer deposition and their impact on perovskite solar cell efficiency
International Journal of Photoenergy, 1172871 (2022)

R. Glatthaar, F. Huster, T. Okker, B. Cela Greven, S. Seren, G. Hahn, B. Terheiden
Contact formation of silver paste and APCVD (n) poly-silicon passivating contacts on planar and textured surfaces
Physica Status Solidi A, 2200501 (2022)

C. Winter, A. Herguth
Contacted resistance measurements for the quantification of boron-hydrogen pairs in crystalline silicon
AIP Conference Proceedings 2487(1), 130016 (2022)

A. Herguth, F. Kostrzewa, D. Sperber
On the impact of substrate contact resistance in bifacial MIS-type lifetime structures
AIP Conference Proceedings 2487(1), 050002 (2022)

Y. Acker, J. Simon, A. Herguth
Formation dynamics of BH and GaH-pairs in crystalline silicon during dark annealing
Physica Status Solidi A 219, 2200142 (2022)

Year 2021

A. Herguth
On the application of lifetime-equivalent defect densities on solar cell level
IEEE Journal of Photovoltaics 11(6), 1410-1418 (2021) 

A. Herguth, C. Winter
Methodology and error analysis of direct resistance measurements used for the quantification of boron–hydrogen pairs in crystalline silicon
IEEE Journal of Photovoltaics 11(4), 1059-1068 (2021)

C. Winter, J. Simon, A. Herguth
Study on boron-hydrogen pairs in bare and passivated float-zone silicon wafers
Physica Status Solidi A 218, 2100220 (2021)

A. Schmid, C. Fischer, D. Skorka, A. Herguth, C. Winter, A. Zuschlag, G. Hahn
On the role of AlOx thickness in AlOx/SiNy:H layer stacks regarding light- and elevated temperature-induced degradation and hydrogen diffusion in c-Si
IEEE Journal of Photovoltaics 11(4), 967-973 (2021)

M. Mehler, A. Schmid, A. Zuschlag, M. Trempa, G. Hahn
Delay of regeneration by adding aluminum in boron doped crystalline Si
Physica Status Solidi A, 2100603 (2021)

Year 2020

B. Hammann, J. Engelhardt, A. Herguth, G. Hahn
Influencing light and elevated temperature induced degradation and surface related degradation kinetics in float-zone silicon by varying the initial sample state
IEEE Journal of Photovoltaics 10(1), 85-93 (2020)

J. Lindroos, A. Zuschlag, D. Skorka, G. Hahn
Silicon nitride deposition: Impact on lifetime and light-induced degradation at elevated temperature in multicrystalline silicon
IEEE Journal of Photovoltaics 10(1), 8-18 (2020)

J. Steffens, J. Rinder, G. Hahn, B. Terheiden
Correlation between the optical bandgap and the monohydride bond density of hydrogenated amorphous silicon
Journal of Non-Crystalline Solids: X, 100044 (2020)

J. Steffens, S. Weit, J. Rinder, R. Glatthaar, S. Möller, G. Hahn, B. Terheiden
Influence of the carbon concentration on (p) poly-SiCx layer properties with focus on parasitic absorption in front side poly-SiCx/SiOx passivating contacts of solar cells
IEEE Journal of Photovoltaics 10(6), 1624-1631 (2020)

M. Fleck, G. Hahn
Automatic Etch Pit Density analysis in multicrystalline silicon
Computational Materials Science 183, 109886 (2020)

Year 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 9(5), 1182-1194 (2019)  

J. Engelhardt, H. Kromer, G. Hahn, B. Terheiden
Laser doping from as-deposited CVD layers for high-efficiency crystalline silicon solar cells
AIP Conference Proceedings 2147, 070002 (2019)

J. Steffens, J. Rinder, G. Hahn, B. Terheiden
Compensation of the sputter damage during a-Si deposition for poly-Si/SiOx passivating contacts by ex-situ P-doping
AIP Conference Proceedings 2147, 040018 (2019)

D. Sperber, F. Furtwängler, A. Herguth, G. Hahn
Does LeTID occur in c-Si even without a firing step?
AIP Conference Proceedings 2147, 1400011 (2019)

A. Graf, A. Herguth, G. Hahn
Determination of BO-LID and LeTID related activation energies in Cz-Si and FZ-Si using constant injection conditions
AIP Conference Proceedings 2147, 140003  (2019)

M. Mörtter, J. Engelhardt, G. Hahn, B. Terheiden
Investigation of contact resistivity on a Laser doped boron emitter from CVD doping layers
AIP Conference Proceedings 2147, 040013 (2019)

M. Heilig, J. Engelhardt, G. Hahn, B. Terheiden
Comparison of Laser-doped emitters from as-deposited and thermally diffused APCVD doping glasses on silicon substrates
AIP Conference Proceedings 2147, 070004 (2019)

D. Skorka, A. Zuschlag, G. Hahn
Injection resolved spatial lifetime mapping using photoluminescence
AIP Conference Proceedings 2147, 020015 (2019)

A. Dastgheib-Shirazi, G. Hahn, B. Terheiden
Role of thermal SiO2 on passivation of highly doped layer
AIP Conference Proceedings 2147, 070001 (2019)

J. Fichtner, A. Zuschlag, G. Hahn
Gettering efficacy of an APCVD glasses based stacked co-diffusion for bifacial mc-Si PERT solar cells
AIP Conference Proceedings 2147, 140002 (2019)

F. Geml, J. Engelhardt, J. Steffens, L.-F. Reinalter, G. Micard, G. Hahn
GD-OES depth profiling and calibration of B doped dielectric layers
AIP Conference Proceedings 2147, 020003 (2019)

A. Herguth
Simulation study on the impact of boron-oxygen related light-induced degradation in different cell architectures
AIP Conference Proceedings 2147, 140004 (2019)

G. Fischer, A. Dastgheib-Shirazi, B. Terheiden, M. Müller
A novel approach for the evaluation of a phosphorus diffusion design of experiment
AIP Conference Proceedings 2147, 070003 (2019)

M. Fleck, A. Zuschlag, G. Hahn
Etch pit density reduction in POCl3 and APCVD gettered mc-Si
Physica Status Solidi A 216, 1900316 (2019)

A. Herguth
Application of the concept of lifetime‐equivalent defect density in defect systems comprising a multitude of defect species
Physica Status Solidi A 216, 1900322 (2019)

T. Mchedlidze, M. Mahabubul Alam, A. Herguth, J. Weber
In-situ observation of the degradation in multicrystalline Si solar cells by electroluminescence
Physica Status Solidi A 216, 1970055 (2019)

Year 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, accepted 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

Year 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)

Year 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)

Year 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 fort hin RST solar cells by enhanced back sidepassivation
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, pp 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), pp 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 (2015)

Year 2014

G. Hahn, S. Joos
State-of-the-art industrial crystalline silicon solar cells
Semiconductors and Semimetals, Advances in Photovoltaics: Vol. 3., Elsevier, 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, Pages 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, Pages 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, Pages 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 processes
Solar Energy Materials and Solar Cells, in press

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)

Year 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
J. Appl. Phys. 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
J. Appl. Phys. 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
Progr. Photovolt.: Res. Appl., DOI: 10.1002/pip.2388

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
J. Appl. Phys. 113, 214504 (2013)

P. Karzel, A. Frey, S. Fritz, G. Hahn
Influence of hydrogen on interstitial iron concentration in multicrystalline silicon during annealing steps
J. Appl. Phys. 113, 114903 (2013)

S. Wilking, A. Herguth, G. Hahn
Influence of hydrogen on the regeneration of boron-oxygen related defects in crystalline silicon
J. Appl. Phys. 113, 194503 (2013)

N. Brinkmann, G. Micard, Y. Schiele, G. Hahn, B. Terheiden
Free energy loss analysis of heterojunction solar cells
Phys. 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
J. Appl. Phys. 113, 023514 (2013)

Year 2012

K.L. Pollock, J. Junge, G. Hahn
Detailed investigation of surface passivation methods for lifetime measurements on silicon wafers
IEEE J. Photovolt. 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
Sol. Energy Mat  Sol. 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)

Year 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
J. Appl. Phys. 110, 054508 (2011); doi:10.1063/1.3630031

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
Adv. Funct. Mater. 21, 879-890 (2011); DOI: 10.1002/adfm.201000849

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
Progr. Photovolt.: Res. Appl. 19(2) 187-191 (2011), DOI: 10.1002/pip.1008

Year 2009

Year 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
Sol. Energy Mat. Sol. Cells 91, 238-249, 2007

Year 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) (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
J. Appl. Phys. 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
Progr. Photovolt.: Res. Appl. 14, 513-531, 2006

Year 2001 and older

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 Appliance 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
J. Appl. Phys. 79, 2633-2639, 1996