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Journal Articles

Spatio-temporal dynamics induced by competing instabilities in two asymmetrically coupled nonlinear evolution equations

D. Schüler, S. Alonso, A. Torcini, M. Bär
Journal: Chaos: An Interdisciplinary Journal of Nonlinear Science
Chaos 24, 043142 (2014)
https://doi.org/10.1063/1.4905017
Published: December 2014
View article titled, Spatio-temporal dynamics induced by competing instabilities in two asymmetrically coupled nonlinear evolution equations
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Journal Articles

Impact of annealing on the chemical structure and morphology of the thin-film CdTe/ZnO interface

K. Horsley, R. J. Beal, R. G. Wilks, M. Blum, M. Häming, D. A. Hanks, M. G. Weir, T. Hofmann, L. Weinhardt, M. Bär, B. G. Potter, Jr., C. Heske
Journal: Journal of Applied Physics
J. Appl. Phys. 116, 024312 (2014)
https://doi.org/10.1063/1.4890235
Published: July 2014
View article titled, Impact of annealing on the chemical structure and morphology of the thin-film CdTe/ZnO interface
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Journal Articles

Setup for in situ investigation of gases and gas/solid interfaces by soft x-ray emission and absorption spectroscopy

A. Benkert, M. Blum, F. Meyer, R. G. Wilks, W. Yang, M. Bär, F. Reinert, C. Heske, L. Weinhardt
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 85, 015119 (2014)
https://doi.org/10.1063/1.4862059
Published: January 2014
View article titled, Setup for <em>in situ</em> investigation of gases and gas/solid interfaces by soft x-ray emission and absorption spectroscopy
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Journal Articles

The silicon/zinc oxide interface in amorphous silicon-based thin-film solar cells: Understanding an empirically optimized contact

D. Gerlach, R. G. Wilks, D. Wippler, M. Wimmer, M. Lozac'h, R. Félix, A. Mück, M. Meier, S. Ueda, H. Yoshikawa, M. Gorgoi, K. Lips, B. Rech, M. Sumiya, J. Hüpkes, K. Kobayashi, M. Bär
Journal: Applied Physics Letters
Appl. Phys. Lett. 103, 023903 (2013)
https://doi.org/10.1063/1.4813448
Published: July 2013
View article titled, The silicon/zinc oxide interface in amorphous silicon-based thin-film solar cells: Understanding an empirically optimized contact
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Journal Articles

Lateral inhomogeneity of the Mg/(Zn+Mg) composition at the (Zn,Mg)O/CuIn(S,Se)2 thin-film solar cell interface revealed by photoemission electron microscopy

M. Bär, J.-P. Theisen, R. G. Wilks, F. Erfurth, R. Félix, D. Gerlach, S. Haas, L. Tati Bismaths, F. Reinert, F. Kronast, T. P. Niesen, J. Palm, S. Visbeck, L. Weinhardt
Journal: Journal of Applied Physics
J. Appl. Phys. 113, 193709 (2013)
https://doi.org/10.1063/1.4804413
Published: May 2013
View article titled, Lateral inhomogeneity of the Mg/(Zn+Mg) composition at the (Zn,Mg)O/CuIn(S,Se)<sub>2</sub> thin-film solar cell interface revealed by photoemission electron microscopy
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Journal Articles

Non-equivalent carbon atoms in the resonant inelastic soft X-ray scattering map of cysteine

F. Meyer, L. Weinhardt, M. Blum, M. Bär, R. G. Wilks, W. Yang, C. Heske, F. Reinert
Journal: The Journal of Chemical Physics
J. Chem. Phys. 138, 034306 (2013)
https://doi.org/10.1063/1.4774059
Published: January 2013
View article titled, Non-equivalent carbon atoms in the resonant inelastic soft X-ray scattering map of cysteine
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Journal Articles

Intergrain variations of the chemical and electronic surface structure of polycrystalline Cu(In,Ga)Se2 thin-film solar cell absorbers

R. G. Wilks, I. Repins, M. A. Contreras, R. Félix, J. Herrero-Albillos, L. Tati-Bismaths, F. Kronast, R. Noufi, M. Bär
Journal: Applied Physics Letters
Appl. Phys. Lett. 101, 103908 (2012)
https://doi.org/10.1063/1.4751261
Published: September 2012
View article titled, Intergrain variations of the chemical and electronic surface structure of polycrystalline Cu(In,Ga)Se<sub>2</sub> thin-film solar cell absorbers
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Journal Articles

Na incorporation into Cu(In,Ga)Se2 thin-film solar cell absorbers deposited on polyimide: Impact on the chemical and electronic surface structure

X. Song, R. Caballero, R. Félix, D. Gerlach, C. A. Kaufmann, H.-W. Schock, R. G. Wilks, M. Bär
Journal: Journal of Applied Physics
J. Appl. Phys. 111, 034903 (2012)
https://doi.org/10.1063/1.3679604
Published: February 2012
View article titled, Na incorporation into Cu(In,Ga)Se<sub>2</sub> thin-film solar cell absorbers deposited on polyimide: Impact on the chemical and electronic surface structure
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Journal Articles

Cliff-like conduction band offset and KCN-induced recombination barrier enhancement at the CdS/Cu2ZnSnS4 thin-film solar cell heterojunction

M. Bär, B.-A. Schubert, B. Marsen, R. G. Wilks, S. Pookpanratana, M. Blum, S. Krause, T. Unold, W. Yang, L. Weinhardt, C. Heske, H.-W. Schock
Journal: Applied Physics Letters
Appl. Phys. Lett. 99, 222105 (2011)
https://doi.org/10.1063/1.3663327
Published: November 2011
View article titled, Cliff-like conduction band offset and KCN-induced recombination barrier enhancement at the CdS/Cu<sub>2</sub>ZnSnS<sub>4</sub> thin-film solar cell heterojunction
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Journal Articles

Impact of KCN etching on the chemical and electronic surface structure of Cu2ZnSnS4 thin-film solar cell absorbers

M. Bär, B.-A. Schubert, B. Marsen, S. Krause, S. Pookpanratana, T. Unold, L. Weinhardt, C. Heske, H.-W. Schock
Journal: Applied Physics Letters
Appl. Phys. Lett. 99, 152111 (2011)
https://doi.org/10.1063/1.3650717
Published: October 2011
View article titled, Impact of KCN etching on the chemical and electronic surface structure of Cu<sub>2</sub>ZnSnS<sub>4</sub> thin-film solar cell absorbers
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Journal Articles

Hard x-ray photoelectron spectroscopy study of the buried Si/ZnO thin-film solar cell interface: Direct evidence for the formation of Si–O at the expense of Zn-O bonds

M. Wimmer, M. Bär, D. Gerlach, R. G. Wilks, S. Scherf, C. Lupulescu, F. Ruske, R. Félix, J. Hüpkes, G. Gavrila, M. Gorgoi, K. Lips, W. Eberhardt, B. Rech
Journal: Applied Physics Letters
Appl. Phys. Lett. 99, 152104 (2011)
https://doi.org/10.1063/1.3644084
Published: October 2011
View article titled, Hard x-ray photoelectron spectroscopy study of the buried Si/ZnO thin-film solar cell interface: Direct evidence for the formation of Si–O at the expense of Zn-O bonds
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Includes: Supplementary data
Journal Articles

Soft x-ray emission spectroscopy studies of the electronic structure of silicon supersaturated with sulfur

J. T. Sullivan, R. G. Wilks, M. T. Winkler, L. Weinhardt, D. Recht, A. J. Said, B. K. Newman, Y. Zhang, M. Blum, S. Krause, W. L. Yang, C. Heske, M. J. Aziz, M. Bär, T. Buonassisi
Journal: Applied Physics Letters
Appl. Phys. Lett. 99, 142102 (2011)
https://doi.org/10.1063/1.3643050
Published: October 2011
View article titled, Soft x-ray emission spectroscopy studies of the electronic structure of silicon supersaturated with sulfur
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Journal Articles

Electron-hole correlation effects in core-level spectroscopy probed by the resonant inelastic soft x-ray scattering map of C60

L. Weinhardt, O. Fuchs, D. Batchelor, M. Bär, M. Blum, J. D. Denlinger, W. Yang, A. Schöll, F. Reinert, E. Umbach, C. Heske
Journal: The Journal of Chemical Physics
J. Chem. Phys. 135, 104705 (2011)
https://doi.org/10.1063/1.3633953
Published: September 2011
View article titled, Electron-hole correlation effects in core-level spectroscopy probed by the resonant inelastic soft x-ray scattering map of C<sub>60</sub>
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Journal Articles

Native oxidation and Cu-poor surface structure of thin film Cu2ZnSnS4 solar cell absorbers

M. Bär, B.-A. Schubert, B. Marsen, S. Krause, S. Pookpanratana, T. Unold, L. Weinhardt, C. Heske, H.-W. Schock
Journal: Applied Physics Letters
Appl. Phys. Lett. 99, 112103 (2011)
https://doi.org/10.1063/1.3637574
Published: September 2011
View article titled, Native oxidation and Cu-poor surface structure of thin film Cu<sub>2</sub>ZnSnS<sub>4</sub> solar cell absorbers
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Journal Articles

Publisher’s Note: “X-ray photoelectron spectroscopy study of the chemical interaction at the Pd/SiC interface” [J. Appl. Phys. 108, 093702 (2010)]

Y. Zhang (张宇锋), G. Gajjala, T. Hofmann, L. Weinhardt, M. Bär, C. Heske, M. Seelmann-Eggebert, P. Meisen
Journal: Journal of Applied Physics
J. Appl. Phys. 109, 029902 (2011)
https://doi.org/10.1063/1.3532951
Published: January 2011
View article titled, Publisher’s Note: “X-ray photoelectron spectroscopy study of the chemical interaction at the Pd/SiC interface” [J. Appl. Phys. 108, 093702 (2010)]
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Journal Articles

X-ray photoelectron spectroscopy study of the chemical interaction at the Pd/SiC interface

Y. Zhang (张宇锋), G. Gajjala, T. Hofmann, L. Weinhardt, M. Bär, C. Heske, M. Seelmann-Eggebert, P. Meisen
Journal: Journal of Applied Physics
J. Appl. Phys. 108, 093702 (2010)
https://doi.org/10.1063/1.3500374
Published: November 2010
View article titled, X-ray photoelectron spectroscopy study of the chemical interaction at the Pd/SiC interface
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Journal Articles

Effects of postdeposition treatments on surfaces of CdTe/CdS solar cells

S. Pookpanratana, X. Liu (刘向鑫), N. R. Paudel, L. Weinhardt, M. Bär, Y. Zhang (张宇锋), A. Ranasinghe, F. Khan, M. Blum, W. Yang, A. D. Compaan, C. Heske
Journal: Applied Physics Letters
Appl. Phys. Lett. 97, 172109 (2010)
https://doi.org/10.1063/1.3505155
Published: October 2010
View article titled, Effects of postdeposition treatments on surfaces of CdTe/CdS solar cells
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Journal Articles

CdS / Cu ( In , Ga ) Se 2 interface formation in high-efficiency thin film solar cells

S. Pookpanratana, I. Repins, M. Bär, L. Weinhardt, Y. Zhang, R. Félix, M. Blum, W. Yang, C. Heske
Journal: Applied Physics Letters
Appl. Phys. Lett. 97, 074101 (2010)
https://doi.org/10.1063/1.3481405
Published: August 2010
View article titled, CdS / Cu ( In , Ga ) Se 2 interface formation in high-efficiency thin film solar cells
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Journal Articles

Impact of solid-phase crystallization of amorphous silicon on the chemical structure of the buried Si/ZnO thin film solar cell interface

M. Bär, M. Wimmer, R. G. Wilks, M. Roczen, D. Gerlach, F. Ruske, K. Lips, B. Rech, L. Weinhardt, M. Blum, S. Pookpanratana, S. Krause, Y. Zhang, C. Heske, W. Yang, J. D. Denlinger
Journal: Applied Physics Letters
Appl. Phys. Lett. 97, 072105 (2010)
https://doi.org/10.1063/1.3462316
Published: August 2010
View article titled, Impact of solid-phase crystallization of amorphous silicon on the chemical structure of the buried Si/ZnO thin film solar cell interface
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Includes: Supplementary data
Journal Articles

Chemical structure of vanadium-based contact formation on n-AlN

S. Pookpanratana, R. France, M. Blum, A. Bell, M. Bär, L. Weinhardt, Y. Zhang, T. Hofmann, O. Fuchs, W. Yang, J. D. Denlinger, S. Mulcahy, T. D. Moustakas, C. Heske
Journal: Journal of Applied Physics
J. Appl. Phys. 108, 024906 (2010)
https://doi.org/10.1063/1.3456060
Published: July 2010
View article titled, Chemical structure of vanadium-based contact formation on n-AlN
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