Publications

Publications 2011

Publications 2010

Publications 2009

Publications 2007 / 2008

Older publications

 Reprints are available on request

 

Publications 2019

 

Can we see defects in capacitance measurements of thin‐film solar cells ? Florian Werner, Finn Babbe, Hossam Elanzeery, Susanne Siebentritt. Prog Photovolt Res Appl. (2019) 27:1045–1058

Electronic defects in Cu(In,Ga)Se2: Towards a comprehensive model. Conrad Spindler, Finn Babbe, Max Hilaire Wolter, Florian Ehré, Korra Santhosh, Pit Hilgert, Florian Werner, and Susanne Siebentritt. PHYSICAL REVIEW MATERIALS 3, 090302 (2019)

The hunt for the third acceptor in CuInSe2 and Cu(In,Ga)Se2 absorber layers. Finn Babbe, Hossam Elanzeery, Max H Wolter, Korra Santhosh and Susanne Siebentritt. Journal of Physics: Condensed Matter 31 (2019) 425702

Quasi-Fermi-Level Splitting of Cu-Poor and Cu-Rich CuInS2 Absorber Layers. Alberto Lomuscio, Tobias Rödel, Torsten Schwarz, Baptiste Gault, Michele Melchiorre, Dierk Raabe  and Susanne Siebentritt. PHYSICAL REVIEW APPLIED 11, 054052 (2019)

Challenge in Cu-rich CuInSe2 thin film solar cells: Defect caused by etching. Hossam Elanzeery, Michele Melchiorre, Mohit Sood, Finn Babbe, Florian Werner, Guy Brammertz and Susanne Siebentritt. PHYSICAL REVIEW ATERIALS 3, 055403 (2019)

Variable chemical decoration of extended defects in Cu-poor Cu2ZnSnSe4 thin films. Torsten Schwarz, Alex Redinger, Susanne Siebentritt, Zirong Peng, Baptiste Gault, Dierk Raabe, and Pyuck-Pa Choi. PHYSICAL REVIEW MATERIALS 3, 035402 (2019)

Time-resolved photoluminescence on double graded Cu(In,Ga)Se2 – Impact of front surface recombination and its temperature dependence. Thomas Paul Weiss, Romain Carron, Max H. Wolter, Johannes Löckinger, Enrico Avancini, Susanne Siebentritt, Stephan Buecheler and Ayodhya N. Tiwari. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS (2019) VOL. 20, NO. 1, 313–323. https://doi.org/10.1080/14686996.2019.1586583

 

Publications 2018

 Influence of Sodium and Rubidium Postdeposition Treatment on the Quasi-Fermi Level Splitting of Cu(In,Ga)Se2 Thin Films. Max Hilaire Wolter, Benjamin Bissig, Enrico Avancini, Romain Carron, Stephan Buecheler , Philip Jackson, and Susanne Siebentritt. IEEE JOURNAL OF PHOTOVOLTAICS, 1320-1325, VOL. 8, NO. 5, SEPT 2018

Interdiffusion and Doping Gradients at the Buffer/Absorber Interface in Thin-Film Solar Cells. Florian Werner, Finn Babbe, Jan Burkhart, Conrad Spindler, Hossam Elanzeery, and Susanne Siebentritt. ACS Applied Materials & Interfaces. 2018, 10, 8553−28565

Investigation on the Angle and Spectral Dependence of the Internal and the External Quantum Efficiency of Crystalline Silicon Solar Cells and Modules. Nils Reiners , Ulf Blieske, and Susanne Siebentritt. IEEE JOURNAL OF PHOTOVOLTAICS 2018

Potassium fluoride postdeposition treatment with etching step on both Cu-rich and Cu-poor CuInSe2 thin film solar cells. Finn Babbe, Hossam Elanzeery, Michele Melchiorre, Anastasiya Zelenina, and Susanne Siebentritt. PHYSICAL REVIEW MATERIALS 2, 105405 (2018)

The Optical Diode Ideality Factor Enables Fast Screening of Semiconductors for Solar Cells. Finn Babbe, Leo Choubrac, and Susanne Siebentritt. Solar RRL 2018, 1800248

High‐performance low bandgap thin film solar cells for tandem Applications. Hossam Elanzeery, Finn Babbe, Michele Melchiorre, Florian Werner, Susanne Siebentritt (2018) Progress in Photovoltaics: Research and Applications. DOI: 10.1002/pip.3026

Sodium enhances indium-gallium interdiffusion in copper indium gallium diselenide photovoltaic absorbers. Diego Colombara, Florian Werner, Torsten Schwarz, Ingrid Cañero Infante, Yves Fleming, Nathalie Valle, Conrad Spindler, Erica Vacchieri, Germain Rey, Mael Guennou, Muriel Bouttemy, Alba Garzón Manjón, Inmaculada Peral Alonso, Michele Melchiorre, Brahime El Adib, Baptiste Gault, Dierk Raabe, Phillip J. Dale & Susanne Siebentritt. (2018) 9:826 DOI: 0.1038/s41467-018-03115-0. Nature Communication

Buffer Layers, Defects, and the Capacitance Step in the Admittance Spectrum of a Thin-Film SolarCell. Florian Werner and Susanne Siebentritt. (2018) PHYSICAL REVIEW APPLIED 9, 054047

Alkali treatments of Cu(In,Ga)Se2 thin‐film absorbers and their impact on transport barriers. Florian Werner, Max Hilaire Wolter, Susanne Siebentritt, Giovanna Sozzi, Simone Di Napoli, Roberto Menozzi, Philip Jackson, Wolfram Witte, Romain Carron, Enrico Avancini, Thomas Paul Weiss, Stephan Buecheler. (2018) Progress in Photovoltaics: Research and Applications. 1-13

Absorption Coefficient of a Semiconductor Thin Film from Photoluminescence. G. Rey, C. Spindler, F. Babbe, W. Rachad, S. Siebentritt, M. Nuys, R. Carius, S. Li, C. Platzer-Björkman. PHYSICAL REVIEW APPLIED
9, 064008 1-11 (2018)

On the origin of band-tails in kesterite. G. Rey, G. Larramonab, S. Bourdais, C. Choné, B. Delatouche, A. Jacob, G. Dennler, S. Siebentritt. (2018) Solar Energy Materials and Solar Cells

 

Publications 2017

A Novel Fast Process for Zn(O,S) Buffer Layers, Doped With Al and B and Deposited on CIGSSe Solar Cells. C. Hönes, J. Hackenberg, R. Keller, S. Zweigart, A. Fuchs, and S. Siebentritt. IEEE JOURNAL OF PHOTOVOLTAICS, Vol. 7, No. 3, May 2017

High voltage, please!  Susanne Siebentritt. Nature Energy, Vol 2, 840-841 (2017)

Space-charge-limited currents in CIS-based solar cells. A. Zelenina, F. Werner, H. Elanzeery, M. Melchiorre, and S. Siebentritt. APPLIED PHYSICS LETTERS 111, 213903 (2017)

Hall measurements on low-mobility thin films. Florian Werner. Journal of Applied Physics 122, 135306 (2017); doi: 10.1063/1.4990470

Correcting for interference effects in the photoluminescence of Cu(In,Ga)Se2 thin films. Max Hilaire Wolter, Benjamin Bissig, Patrick Reinhard, Stephan Buecheler, Philip Jackson, and Susanne Siebentritt. Phys. Status Solidi C 14, No. 6, 1600189 (2017)

Potassium fluoride ex-situ treatment on both Cu-rich and Cu-poor CuInSe2 thin film solar cells. H. Elanzeery, F. Babbe, M. Melchiorre, E. Robert, A. Zelenina, S. Siebentritt. Journal of Photovoltaics 7, 684, 2017

Better Cu(In,Ga)Se2 solar cells based on surface treated stoichiometric absorbers. L. Choubrac, T. Bertram,  H. ElAnzeery, S. Siebentritt. physica status solidi a 214, 1600482, 2017

Innovation highway: Breakthrough milestones and key evelopments in chalcopyrite photovoltaics from a retrospective viewpoint. Daniel Abou-Ras, Sigurd Wagner, Bill J. Stanbery, Hans-Werner Schock , Roland Scheer, Lars Stolt, Susanne Siebentritt, Daniel Lincot, Chris Eberspacher, Katsumi Kushiya, Ayodhya N. Tiwari. Thin Solid Films 633 (2017) 2–12

What is the dopant concentration in polycrystalline thin-film Cu(In,Ga)Se2?. F. Werner, T. Bertram, J. Mengozzi, S. Siebentritt. Thin Solid Films 633 (2017) 222–226

Post-deposition treatment of Cu2ZnSnSe4 with alkalis. G. Reya, F. Babbe, T.P. Weiss, H. Elanzeery, M. Melchiorre, N. Valle, B. El Adibb, S. Siebentritt. Thin Solid Films 633 (2017) 162–165

Chalcopyrite compound semiconductors for thin film solar cells. Susanne Siebentritt. Current Opinion in Green and Sustainable Chemistry 2017, 4:1–7

 

Publications 2016

Improved environmental stability of highly conductive nominally undoped ZnO layers suitable for n-type windows in thin film solar cells. M. Hála, H. Kato, M. Algasinger, Y. Inoue, G. Reya, F. Werner, Ch. Schubbert, T. Dalibor, S. Siebentritt. Solar Energy Materials & Solar Cells. (2016)

Environmental stability of highly conductive nominally undoped ZnO layers. Matej Hála, Yukari Inoue, Hiroki Kato, Germain Rey, Florian Werner, Christian Schubbert, Michael Algasinger, Thomas Dalibor, Susanne Siebentritt. 43rd IEEE Photovoltaic Specialist Conference, 2016, Denver

Cu–Zn disorder and band gap fluctuations in Cu2ZnSn(S,Se)4:  Theoretical and experimental investigations. Jonathan J. S. Scragg, Jes K. Larsen, Mukesh Kumar, Clas Persson, Jan Sendler, Susanne Siebentritt, and Charlotte Platzer Björkman. Phys. Status Solidi B 253, No. 2, 247–254 (2016)

What is the bandgap of kesterite?. Susanne Siebentritt, Germain Rey, Ashley Finger, David Regesch, Jan Sendler, Thomas Paul Weiss, Tobias Bertram. Solar Energy Materials & Solar Cells 158 (2016) 126–129

Photoluminescence studies in epitaxial CZTSe thin films. Jan Sendler, Maxime Thevenin, Florian Werner, Alex Redinger, Shuyi Li,Carl Hägglund, Charlotte Platzer-Björkman, and Susanne Siebentritt. JOURNAL OF APPLIED PHYSICS 120, 125701 (2016)

Quasi Fermi level splitting of Cu-rich and Cu-poor Cu(In,Ga)Se2 absorber layers. Finn Babbe, Leo Choubrac, and Susanne Siebentritt. APPLIED PHYSICS LETTERS 109, 082105 (2016)

Impact of annealing on electrical properties of Cu2ZnSnSe4 absorber layers. Thomas Paul Weiss, Alex Redinger, Germain Rey, Torsten Schwarz, Maria Spies, Oana Cojocura-Mirédin, P.-P.Choi, and Susanne Siebentritt. JOURNAL OF APPLIED PHYSICS 120, 045703 (2016)

Revisiting radiative deep-level transitions in CuGaSe2 by photoluminescence. Conrad Spindler, David Regesch, and Susanne Siebentritt. APPLIED PHYSICS LETTERS 109, 032105 (2016)

Doping mechanism in pure CuInSe2. F. Werner, D. Colombara, M. Melchiorre, N. Valle, B. El Adib, C. Spindler, and S. Siebentritt. Journal of Applied Physics 119, 173103 (2016), doi: 10.1063/1.4947585

Improved Chemically Deposited Zn(O,S) Buffers for Cu(In,Ga)(S,Se)2 Solar Cells by Controlled Incorporation of Indium. Christian Hones, Anne Fuchs, Siegmund Zweigart, and Susanne Siebentritt. IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 6, NO. 1 (2016)

Ordering kesterite improves solar cells:A low temperature post-deposition annealing study. G. Rey, T.P.Weiss, J.Sendler , A.Finger, C.Spindler, F.Werner, M.Melchiorre, M. Hála, M.Guennou, S.Siebentritt. Solar Energy Materials & Solar Cells 151 (2016) 131–138

Electrical Characterization of Defects in Cu-Rich Grown CuInSe2 Solar Cells. Tobias Bertram, Valérie Deprédurand, and Susanne Siebentritt. IEEE JOURNAL OF PHOTOVOLTAICS 6, 546, (2016)

 

Publications 2015

Alternative etchning for improved Cu-rich CuInSe2 solar Cells. V. Deprédurand, T. Bertram, M. Thevenin, N. Valle, J-N. Audinot and S. Siebentritt. (2015). Matter Rec. Soc. Symp. Proc. Vol 1771

What is the bandgap of kesterite?. Susanne Siebentritt, Germain Rey, Ashley Finger, David Regesch, Jan Sendler, Thomas Paul Weiss, Tobias Bertram. Solar Energy Materials & Solar Cells (2015). doi.org/10.1016/j.solmat.2015.10.017

Detection of Cu2Zn5SnSe8 and Cu2Zn6SnSe9 phases in co-evaporated Cu2ZnSnSe4 thin-films. Torsten Schwarz, Miguel A. L. Marques, Silvana Botti, Marina Mousel, Alex Redinger, Susanne Siebentritt,Oana Cojocaru-Mirédin, Dierk Raabe, and Pyuck-Pa Choi. Applied Physics Letters 107, 172102 (2015); doi: 10.1063/1.4934847

Atom probe tomography study of internal interfaces in Cu2ZnSnSe4 thin-films. T. Schwarz, O. Cojocaru-Mirédin, P. Choi, M. Mousel, A. Redinger, S. Siebentritt, and D. Raabe (2015) Journal of Applied Physics 118, 095302 (2015); doi: 10.1063/1.4929874

Cu-rich CuInSe2 solar cells with a Cu-poor surface. Yasuhiro Aida, Valérie Depredurand, Jes K Larsen, Hitoshi Arai, Daisuke Tanaka, Masato Kurihara and Susanne Siebentritt. Prog. Photovolt. vol. 23 - 754–764 DOI: 10.1002/pip.2493 (2015).

A comparative study of the annealing behavior of Cu(In, Ga)(S,Se)2 based solar cells with an indium sulfide buffer layer, partly submitted to wet chemical treatments. C. Hönes, J. Hackenberg, S. Zweigart, A. Wachau, F. Hergert and S. Siebentritt. Journal of Applied Physics 117, 094503 (2015). doi 10.1063/1.4914080

Highly conductive ZnO films with high near infrared transparency. Matej Hála, Shohei Fujii, Alex Redinger, Yukari Inoue, Germain Rey, Maxime Thevenin, Valérie Deprédurand, Thomas Paul Weiss, Tobias Bertram and Susanne Siebentritt. PROGRESS IN PHOTOVOLTAICS: RESEARCH AND APPLICATIONS. 2015. DOI: 10.1002/pip.2601

 

Publications 2014

 

Annealing of wet treated Cu(In,Ga)(S,Se)2 solar cells with an indium sulfide buffer. C. Hönes, S. Siebentritt Thin Solid Films, doi 10.1016/j.tsf.2014.10.056, (2014)

Assessment of crystal quality and unit cell orientation in epitaxial Cu2ZnSnSe4 layers using polarized Raman scattering. Christoph Krammer, Mario Lang, Alex Redinger, Johannes Sachs, Chao Gao, Heinz Kalt, Susanne Siebentritt, and Michael Hetterich. Vol. 22, No. 23 | DOI:10.1364/OE.22.028240 | OPTICS EXPRESS 28240. (2014)

Epitaxial Cu2ZnSnSe4 thin films and devices. Alex Redinger, Heiko Groiss, Jan Sendler, Rabie Djemour, David Regesch, Dagmar Gerthsen, Susanne Siebentritt. Thin Solid Films (2014) http://dx.doi.org/10.1016/ j.tsf.2014.11.040

Different Bandgaps in Cu2ZnSnSe4 : a high temperature coevaporation study. Alex Redinger, Jan Sendler, Rabie Djemour, Thomas P. Weiss, Germain Rey, Phillip J. Dale, and Susanne Siebentritt. IEEE Journal of Photovoltaics (2014)

Simplified formation process for Cu2ZnSnS4-based solar cells. Dominik M. Berg, Alexandre Crossay, Jérôme Guillot, Victor Izquierdo-Roca, Alejandro Pérez-Rodriguez, Shafaat Ahmed, Hariklia Deligianni, Susanne Siebentritt, Phillip J. Dale. Thin Solid Films 573 (2014) 148–158

Current loss due to recombination in Cu-rich CuInSe2 solar cells. Valérie Deprédurand, Daisuke Tanaka, Yasuhiro Aida, Miriam Carlberg, Nicole Fèvre, and Susanne Siebentritt. Journal of Applied Physics 115, 044503 (2014).

 

Composition dependent characterization of copper indium diselenide thin film solar cells synthesized from electrodeposited binary selenide precursor stacks. Johannes Fischer, Jes K. Larsen, Jerome Guillot, Yasuhiro Aida, Tobias Eisenbarth, David Regesch, Valerie Depredurand, Nicole Fevre, Susanne Siebentritt, Phillip Dale. Solar Energy Materials & Solar Cells 126 (2014) 88–952.

Metastable defect in CuInSe2 probed by modulated photo current experiments above 390K. Jennifer Luckas, Christophe Longeaud, Tobias Bertram, and Susanne Siebentritt. Applied Physics Letters 104, 153905 (2014).

Multiple phases of Cu2ZnSnSe4 detected by room temperature photoluminescence. Rabie Djemour, Alex Redinger, Marina Mousel, Levent Gütay, and Susanne Siebentritt. JOURNAL OF APPLIED PHYSICS 116, 073509 (2014).

Modulated photocurrent experiments-comparison of different data treatments. Jennifer Luckas, Christophe Longeaud and Susanne Siebentritt. Journal of Applied Physics 116, 103710 (2014).

The band gap of Cu2ZnSnSe4: Effect of order-disorder. G. Rey, A. Redinger, J. Sendler, T. P. Weiss, M. Thevenin, M. Guennou, B. El Adib, and S. Siebentritt. Applied Physics Letters 105, 112106 (2014). doi: 10.1063/1.4896315

The influence of Se pressure on the electronic properties of CuInSe2 grown under Cu-excess. Valérie Deprédurand, Tobias Bertram, David Regesch, Benjamin Henx, and Susanne Siebentritt. Applied Physics Letters 105, 172104 (2014). doi: 10.1063/1.4900839

Direct Evaluation of Defect Distributions From Admittance Spectroscopy. Thomas Paul Weiss, Alex Redinger, David Regesch, Marina Mousel, and Susanne Siebentritt. IEEE JOURNAL OF PHOTOVOLTAICS, Vol. 4, No. 6, November 2014.

In-Se surface treatment of Cu-rich grown CuInSe2. Tobias Bertram, Valerie Depredurand, and Susanne Siebentritt. Proceedings of the IEEE Photovoltaic Specialist Conference 2014.

 

Publications 2013

 

Atom probe study of Cu2ZnSnSe4 thin-films prepared by co-evaporation and post-deposition annealing. T. Schwarz, O. Cojocaru-Mirédin, P. Choi, M. Mousel, A. Redinger et al. Applied Physics Letters,102, 042101 (2013).

Why are kesterite solar cells not 20% efficient? S. Siebentritt. Thin Solid Films 535, 1-4 (2013).

HCl and Br2-MeOH etching of Cu2ZnSnSe4 polycrystalline absorbers. Marina Mousel, Alex Redinger, Rabie Djemour, Monika Arasimowicz, Nathalie Valle, Phillip Dale, Susanne Siebentritt, Thin Solid Films 535, 83–87 (2013).

Influence of S/Se ratio on series resistance and on dominant recombination pathway in Cu2ZnSn(SSe)4 thin film solar cells. Alex Redinger, Marina Mousel, Max Hilaire Wolter, Nathalie Valle, Susanne Siebentritt. Thin Solid Films 535 (2013) 291–295.

Admittance spectroscopy in kesterite solar cells: Defect signal or circuit response. Thomas Paul Weiss, Alex Redinger, Jennifer Luckas, Marina Mousel, and Susanne Siebentritt. Applied Physics Letters,102, 202105 (2013).

Why are Cu-rich CIS solar cells not yet living up to their promises? V. Depredurand, D. Tanaka, Y. Aida, N. Fevre, S. Siebentritt. Journal of Applied Physics, (2013)

Detecting ZnSe secondary phase in Cu2 ZnSnSe4 by room temperature photoluminescence. R. Djemour, M. Mousel, A. Redinger, L. Gütay, A. Crossay, D. Colombara, P. Dale, S. Siebentritt. Appl. Phys. Lett, 102, 222108, 2013

The three A symmetry Raman modes of kesterite in Cu2ZnSnSe4. R. Djemour, A. Redinger, M. Mousel, L. Gütay, X. Fontané, V. Izquierdo-Roca, A. Pérez-Rodríguez, S. Siebentritt.Optics Express, 21, A695, 2013

Why do we make Cu(In,Ga)Se2 solar cells non-stoichiometric? S. Siebentritt, L. Gütay, D. Regesch, Y. Aida, V. Deprédurand. Solar Energy Mat. Solar Cells, 119, 18, 2013

Cu-rich precursors improve kesterite solar cells. M. Mousel, T. Schwarz, R. Djemour, T. P. Weiss, J. Sendler, A. Redinger, O. Cojocaru-Miredin, P.-P. Choi, S. Siebentritt. Advanced Energy Materials, 2013, doi 10.1002/aenm.201300543

Cu2ZnSnSe4 thin film solar cells produced via coevaporation and annealing including a SnSe2 capping layer. A. Redinger, M. Mousel, R. Djemour, L. Guetay, N. Valle, S. Siebentritt. Prog. in Photovoltaics, DOI: 10.1002/pip.2324

How does the Selenium activity influence CuInSe2 devices grownunder Cu-excess? V. Deprédurand a, T. Bertram a, S. Siebentritt.Proc. of SPIE Vol. 8823 882304-1, 2013

Molecular beam epitaxy of Cu2 ZnSnSe4 thin films grown on GaAs(001). A. Redinger, R. Djemour, T. P. Weiss, J. Sendler, S. Siebentritt.Proc. 39th IEEE PV Specialist Conference, Tampa, 2013

Role of high series resistance in admittance spectroscopy of kesterite solar cells. T. P. Weiss, A. Redinger, J. Luckas, M. Mousel, S. Siebentritt.Proc. 39th IEEE PV Specialist Conference, Tampa, 2013

Influence of the Se environment on Cu-rich CIS devices. V. Deprédurand, T. Bertram, S. Siebentritt, phys. stat. sol c, 2013

 

Publications 2012

 

Kesterites - a challenging material for solar cells. Susanne Siebentritt and Susan Schorr. Progress in Photovoltaics: Research and Applications, 20 :512-519 (2012).

Thin film solar cells based on the ternary compound Cu2SnS3. Dominik M. Berg, Rabie Djemour, Levent Gütay, Guillaume Zoppi, Susanne Siebentritt, Phillip J. Dale. Thin Solid Films 520, 6291–6294 (2012).

Vacancy defects in epitaxial thin film CuGaSe2 and CuInSe2. E. Korhonen, K. Kuitunen, and F. Tuomisto, A. Urbaniak and M. Igalson, J. Larsen, L. Gütay, and S. Siebentritt, Y. Tomm. PHYSICAL REVIEW B 86, 064102 (2012).

Feedback mechanism for the stability of the band gap of CuInSe2. Levent Gutay, David Regesch, Jes K. Larsen, Yasuhiro Aida, Valerie Depredurand, Alex Redinger, Sabina Caneva, Susan Schorr, Christiane Stephan, Julien Vidal, Silvana Botti, and Susanne Siebentritt. PHYSICAL REVIEW B 86, 045216 (2012).

Raman analysis of monoclinic Cu2SnS3 thin films. Dominik M. Berg, Rabie Djemour, Levent Gütay, Susanne Siebentritt, Phillip J. Dale et al.. Applied Physics Letters, 100, 192103 (2012)

Lone conduction band in Cu2ZnSnSe4. Levent Gütay, Alex Redinger, Rabie Djemour, and Susanne Siebentritt. Applied Physics Letters, 100, 102113 (2012).

Degradation and passivation of CuInSe2. David Regesch, Levent Gütay, Jes K. Larsen, Valérie Deprédurand, Daisuke Tanaka, Yasuhiro Aida, and Susanne Siebentritt. Applied Physics Letters, 101, 112108 (2012).