Department Interface Design

List of publications

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  Abou-Ras, D.; Bär, M.; Caballero, R.; Gunder, R.; Hages, C.; Heinemann, M.D.; Kaufmann, C.A.; Krause, M.; Levcenco, S.; Mainz, R.; Márquez, J.; Nikolaeva, A.; Redinger, A.; Schäfer, N.; Schorr, S.; Stange, H.; Unold, T.; Wilks, R.G.: Advanced characterization and in-situ growth monitoring of Cu(In,Ga)Se₂ thin films and solar cells. Solar Energy 170 (2018), p. 102-112
  doi: 10.1016/j.solener.2018.04.032
  Open Access
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  Agbenyeke, R.; Andreasen, J.; Benhaddou, N.; Bowers, J.W.; Breternitz, J.; Bär, M.; Dimitrievska, M.; Fermin, D.J.; Ganose, A.; Hawkins, C.; Jaramillo, R.; Kavanagh, S.R.; Kondrotas, R.; Major, J.D.; Mandati, S.; Nicolson, A.; Platzer Björkman, C.; Savory, C.; Scanlon, D.O.; Schorr, S.; Scragg, J.J.S.; Sheppard, A.; Shin, B.; Siebentritt, S.; Sood, M.; Sopiha, K.V.; Spalatu, N.; Tang, J.; Walsh, A.; Weiss, T.P.; Woods-Robinson, R.; Yetkin, H.A.: Materials design and bonding: general discussion. Faraday Discussions 239 (2022), p. 375-404
  doi: 10.1039/d2fd90058k
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  Aktekin, B.; Kataev, E.; Riegger, L.M.; Garcia-Diez, R.; Chalkley, Z.; Becker, J.; Wilks, R.G.; Henss, A.; Bär, M.; Janek, J.: Operando Photoelectron Spectroscopy Analysis of Li₆PS₅Cl Electrochemical Decomposition Reactions in Solid-State Batteries. ACS Energy Letters 9 (2024), p. 3492-3500
  doi: 10.1021/acsenergylett.4c01072
  Open Access (external provider)
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  Alvares Ferreira, E.; Yokaichiya, F.; Marumo, J.; Vicente, R.; Garcia-Moreno, F.; Kamm, P.; Klaus, M.; Russina, M.; Günther, G.; Jimenez, C.; Franco, M.: Influence of the irradiation in cement for the Brazilian radioactive waste repositories: Characterization via X-ray diffraction, X-ray tomography and quasielastic neutron scattering. Physica B 551 (2018), p. 256-261
  doi: 10.1016/j.physb.2018.01.018
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  Andreasen, J.W.; Arca, E.; Bowers, J.W.; Bär, M.; Breternitz, J.; Dale, P.J.; Dimitrievska, M.; Fermin, D.J.; Ganose, A.; Hages, C.J.; Hobson, T.; Jaramillo, R.; Kavanagh, S.R.; Kayastha, P.; Kondrotas, R.; Lee, J.; Major, J.D.; Mandati, S.; Mitzi, D.B.; Scanlon, D.O.; Schorr, S.; Scragg, J.J.S.; Shin, B.; Siebentritt, S.; Smiles, M.; Sood, M.; Sopiha, K.V.; Spalatu, N.; Sutton, M.; Unold, T.; Valdes, M.; Walsh, A.; Wang, M.; Wang, X.; Weiss, T.P.; Woo, Y.W.; Woods-Robinson, R.; Tiwari, D.: Novel chalcogenides, pnictides and defect-tolerant semiconductors: general discussion. Faraday Discussions 239 (2022), p. 287-316
  doi: 10.1039/d2fd90057b
  Open Access (external provider)
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  Andreasen, J.W.; Breternitz, J.; Bär, M.; Dale, P.J.; Dimitrievska, M.; Fermin, D.J.; Fleck, N.; Hages, C.J.; Havryliuk, Y.; Hawkins, C.; Jaramillo, R.; Kavanagh, S.R.; Kayastha, P.; Kondrotas, R.; Lapalikar, V.; Mandati, S.; Mitzi, D.B.; Platzer Björkman, C.; Savory, C.; Scragg, J.J.S.; Shin, B.; Siebentritt, S.; Sood, M.; Tiwari, D.; Valdes, M.; Walsh, A.; Weiss, T.P.; Woo, Y.W.; Woods-Robinson, R.; Yetkin, H.A.: Bulk and surface characterisation techniques of solar absorbers: general discussion. Faraday Discussions 239 (2022), p. 180-201
  doi: 10.1039/d2fd90056d
  Open Access (external provider)
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  Bär, M.: EMIL – Energy conversion devices illuminated by soft and hard x-rays. In: 29th Workshop on Quantum Solar Energy Conversion - (QUANTSOL 2017) March 19-25, 2017, Rauris, ÖsterreichQuantsol, 2017, p. 1-2
  http://www.quantsol.org/pub/pub17_05.pdf
  Open Access
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  Bär, M.; Barreau, N.; Couzinie-Devy, F.; Felix, R.; Klaer, J.; Pookpanratana, S.; Blum, M.; Zhang, Y.; Denlinger, J.; Yang, W.; Wilks, R.; Weinhardt, L.; Schock, H.-W.; Kessler, J.; Heske, C.: The heavily intermixed In2S3/Cu(In, Ga)Se2 interface as Revealed by photoelectron and soft x-ray emission spectroscopy. In: 2013 IEEE 39th Photovoltaic Specialists Conference (PVSC)IEEE, 2013. - ISBN 978-1-4799-3299-3, p. 857-862
  doi: 10.1109/PVSC.2013.6744280
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  Bär, M.; Barreau, N.; Couzinié-Devy, F.; Pookpanratana, S.; Klaer, J.; Blum, M.; Zhang, Y.; Yang, W.; Denlinger, J.D.; Schock, H.-W.; Weinhardt, L.; Kessler, J.; Heske C.: Nondestructive depth-resolved spectroscopic investigation of the heavily intermixed In₂S₃/Cu(In,Ga)Se₂ interface. Applied Physics Letters 96 (2010), p. 184101/1-3
  doi: 10.1063/1.3425739
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  Bär, M.; Barreau, N.; Couzinie-Devy, F.; Weinhardt, L.; Wilks, R.G.; Kessler, J.; Heske, C.: Impact of Annealing-Induced Intermixing on the Electronic Level Alignment at the In₂S₃/Cu(In,Ga)Se₂ Thin-Film Solar Cell Interface. ACS Applied Materials & Interfaces 8 (2016), p. 2120-2124
  doi: 10.1021/acsami.5b10614
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  Bär, M.; Klaer, J.; Felix, R.; Barreau, N.; Weinhardt, L.; Wilks, R.G.; Heske, C.; Schock, H.-W.: Surface Off-Stoichiometry of CuInS₂ Thin-Film Solar Cell Absorbers. IEEE Journal of Photovoltaics 3 (2013), p. 828-832
  doi: 10.1109/JPHOTOV.2012.2228299
  Open Access (external provider)
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  Bär, M.; Klaer, J.; Weinhardt, L.; Wilks, R.G.; Krause, S.; Blum, M.; Yang, W.; Heske, C.; Schock, H.-W.: Cu_2-xS Surface Phases and Their Impact on the Electronic Structure of CuInS₂ Thin Films - A Hidden Parameter in Solar Cell Optimization. Advanced Engineering Materials 3 (2013), p. 777-781
  doi: 10.1002/aenm.201200946
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  Bär, M.; Perrenoud, J.; Wilks, R.G.; Buecheler, S.; Kranz, L.; Fella, C.; Skarp, J.; Blum, M.; Yang, W.; Weinhardt, L.; Heske, C.; Tiwari, A.N.: CdCl2 activation-induced chemical interaction at the CdTe/ZnO1-XSX thin-film solar cell interface. In: 2011, 37th IEEE Photovoltaic Specialists Conference (PVSC 2011) : Seattle, Washington, USA, 19 - 24 June 2011Piscataway, NJ: IEEE, 2011. - ISBN 978-1-4244-9965-6, p. 002701-002704
  doi: 10.1109/PVSC.2011.6186505
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  Bär, M.; Pookpanratana, S.; Weinhardt, L.; Wilks, R.-G.; Schubert, B.-A.; Marsen, B.; Unold, T.; Blum, M.; Krause, S.; Zhang, Y.; Ranasinghe, A.; Ramanathan, K.; Repins, I.; Contreras, M.-A.; Nishiwaki, S.; Liu, X.; Paudel, N.-R.; Fuchs, O.; Niesen, T.-P.; Yang, W.; Karg, F.; Compaan, A.-D.; Shafarman, W.-N.; Noufi, R.; Schock, H.-W.; Heske, C.: Soft X-rays shedding light on thin-film solar cell surfaces and interfaces. Journal of Electron Spectroscopy and Related Phenomena 190 (2013), p. 47-53
  doi: 10.1016/j.elspec.2012.10.004
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  Bär, M.; Repins, I.; Contreras, M.A.; Weinhardt, L.; Noufi, R.; Heske, C.: Chemical and electronic surface structure of 20%-efficient Cu(In,Ga)Se₂ thin film solar cell absorbers. Applied Physics Letters 95 (2009), p. 052106/1-3
  doi: 10.1063/1.3194153
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  Bär, M.; Repins, I.; Weinhardt, L.; Alsmeier, J.-H.; Pookpanratana, S.; Blum, M.; Yang, W.; Heske, C.; Wilks, R.G.; Noufi, R.: Zn-Se-Cd-S Interlayer Formation at the CdS/Cu₂ZnSnSe₄ Thin-Film Solar Cell Interface. ACS Energy Letters 2 (2017), p. 1632-1640
  doi: 10.1021/acsenergylett.7b00140
  Open Access
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  Bär, M.; Schnabel, T.; Ahlsmeier, J.-H.; Krause, S.; Koch, N.; Wilks, R.G.; Ahlswede, E.: CdS/low-band-gap kesterite thin-film solar cell absorber heterojunction: Energy level alignment and dominant recombination process. ACS Applied Energy Materials 1 (2018), p. 475-482
  doi: 10.1021/acsaem.7b00071
  Open Access
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  Bär, M.; Schubert, B.; Marsen, B.; Unold, T.; Wilks, R.G.; Schock, H.-W.; Pookpanratana, S.; Blum, M.; Krause, S.; Zhang, Y.; Heske, C.; Yang, W.; Weinhardt, L.: Cu₂ZnSnS₄ thin-film solar cell absorber composition revealed by energy-dispersive and soft x-ray emission spectroscopy. In: 35th IEEE Photovoltaic Specialists Conference (PVSC 2010) : Honolulu, Hawaii, USA, 20 - 25 June 2010Piscataway, NJ: IEEE, 2010. - ISBN 978-1-424-45890-5, p. 646-649
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  Bär, M.; Schubert, B.-A.; Marsen, B.; Krause, S.; Pookpanratana, S.; Unold, T.; Weinhardt, L.; Heske, C.; Schock, H.-W.: Impact of KCN etching on the chemical and electronic surface structure of Cu₂ZnSnS₄ thin-film solar cell absorbers. Applied Physics Letters 99 (2011), p. 152111/1-4
  doi: 10.1063/1.3650717
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  Bär, M.; Schubert, B.-A.; Marsen, B.; Krause, S.; Pookpanratana, S.; Unold, T.; Weinhardt, L.; Heske, C.; Schock, H.-W.: Native oxidation and Cu-poor surface structure of thin film Cu2ZnSnS4 solar cell absorbers. Applied Physics Letters 99 (2011), p. 112103/1-3
  doi: 10.1063/1.3637574
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  Bär, M.; Schubert, B.-A.; Marsen, B.; Schorr, S.; Wilks, R.G.; Weinhardt, L.; Pookpanratana, S.; Blum, M.; Krause, S.; Zhang, Y.; Yang, W.; Unold, T.; Heske, C.; Schock, H.-W.: Electronic structure of Cu₂ZnSnS₄ probed by soft x-ray emission and absorption spectroscopy. Physical Review B 84 (2011), p. 035308/1-6
  doi: 10.1103/PhysRevB.84.035308
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  Bär, M.; Schubert, B.-A.; Marsen, B.; Wilks, R.G.; Blum, M.; Krause, S.; Pookpanratana, S.; Zhang, Y.; Unold, T.; Yang, W.; Weinhardt, L.; Heske, C.; Schock, H.-W.: Cu₂ZnSnS₄ thin-film solar cell absorbers illuminated by soft x-rays. Journal of Materials Research 27 (2012), p. 1097-1104
  doi: 10.1557/jmr.2012.59
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  Bär, M.; Schubert, B.-A.; Marsen, B.; Wilks, R.G.; Pookpanratana, S.; Blum, M.; Krause, S.; Unold, T.; Yang, W.; Weinhardt, L.; Heske, C.; Schock, H.-W.: Cliff-like conduction band offset and KCN-induced recombination barrier enhancement at the CdS/Cu₂ZnSnS₄ thin-film solar cell heterojunction. Applied Physics Letters 99 (2011), p. 222105/1-3
  doi: 10.1063/1.3663327
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  Bär, M.; Schubert, B.-A.; Wilks, R.G.; Marsen, B.; Zhang, Y.; Blum, M.; Krause, S.; Yang, W.; Unold, T.; Weinhardt, L.; Heske, C.; Schock, H.-W.: Identification of Impurity Phases in Cu2ZnSnS4 Thin-film Solar Cell Absorber Material by Soft X-ray Absorption Spectroscopy. In: Bell, L.D. [u.a.] [Eds.] : Compound semiconductors for energy applications and environmental sustainability - 2011 : symposium held April 25 - 29, 2011, San Francisco, California, U.S.A. ; [Symposium D "Compound Semiconductors for Energy Applications and Environmental Sustainability" ... at the 2011 MRS spring meeting]New York, NY: Cambridge Univ. Press, 2011 (Materials Research Society symposium proceedings ; 1324). - ISBN 978-1-605-11301-2, p. mrs11-1324-d15-19/1-6
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  Bär, M.; Starr, D.E.; Lambertz, A.; Holländer, B.; Alsmeier, J.-H.; Weinhardt, L.; Blum, M.; Gorgoi, M.; Yang, W.; Wilks, R.G.; Heske, C.: Microcrystalline silicon oxides for silicon-based solar cells: Impact of the O/Si ratio on the electronic structure. In: Louay A. Eldada ... [Ed.] : Thin Films for Solar and Energy Technology VISPIE, 2014 (Proeedings of the SPIE ; 9177). - ISBN 978-1-6284-1204-8, p. 91770E/1-3
  doi: 10.1117/12.2061902
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  Bär, M.; Theisen, J.-P.; Wilks, R.G.; Erfurth, F.; Felix, R.; Gerlach, D.; Haas, S.; Tati Bismaths, L.; Reinert, F.; Kronast, F.; Niesen, T.P.; Palm, J.; Visbeck, S.; Weinhardt, L.: 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. Journal of Applied Physics 113 (2013), p. 193709/1-5
  doi: 10.1063/1.4804413
  Open Access (external provider)
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  Bär, M.; Weinhardt, L.; Heske, C.: Soft X-ray and Electron Spectroscopy: A Unique "Tool Chest" to Characterize the Chemical and Electronic Properties of Surfaces and Interfaces. In: Advanced Characterization Techniques for Thin Film Solar Cells: Second EditionWeinheim: Wiley, 2016. - ISBN 978-3-527-41003-3, p. 501-522
  doi: 10.1002/9783527699025.ch18
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  Bär, M.; Weinhardt, L.; Marsen, B.; Cole, B.; Gaillard, N.; Miller, E.L.; Heske, C.: Mo incorporation in WO₃ thin film photoanodes: Tailoring the electronic structure for photoelectrochemical hydrogen production. Applied Physics Letters 96 (2010), p. 032107/1-3
  doi: 10.1063/1.3291689
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  Bär, M.; Wimmer, M.; Wilks, R.G.; Roczen, M.; Gerlach, D.; Ruske, F.; Lips, K.; Rech, B.; Weinhardt, L.; Blum, M.; Pookpanratana, S.; Krause, S.; Zhang, Y.; Heske, C.; Yang, W.; Denlinger J.D.: Impact of solid-phase crystallization of amorphous silicon on the chemical structure of the buried Si/ZnO thin film solar cell interface. Applied Physics Letters 97 (2010), p. 072105/1-3
  doi: 10.1063/1.3462316
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  Barreau, M.; Salusso, D.; Zhang, J.; Haevecker, M.; Teschner, D.; Efimenko, A.; Bournel, F.; Gallet, J.-J.; Borfecchia, E.; Sobczak, K.; Petit, C.: Uncovering the critical function of lanthanum in CH₄ production from CO₂ using exsolved LaNiO₃ perovskite catalysts. Journal of Materials Chemistry A 12 (2024), p. 7605-7621
  doi: 10.1039/d3ta07391b
  Open Access
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  Basbus, J.; Arce, M.; Troiani, H.; Prado, F.; Mogni, L.; Serquis, A.: Characterization of the high temperature properties of BaCe_0.4Zr_0.4Pr_0.2O_3-δ perovskite as a potential material for PC-SOFCs. New Journal of Chemistry 45 (2021), p. 12957-12965
  doi: 10.1039/d1nj02197d
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  Basbus, J.F.; Arce, M.D.; Alonso, J.A.; González, M.A.; Cuello, G.J.; Fernández-Díaz, M.T.; Sha, Z.; Skinner, S.J.; Mogni, L.V.; Serquis, A.C.: In situ neutron diffraction study of BaCe_0.4Zr_0.4Y_0.2O_3-δ proton conducting perovskite: insight into the phase transition and proton transport mechanism. Journal of Materials Chemistry A 10 (2022), p. 9037-9047
  doi: 10.1039/d1ta10789e
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  Basbus, J.F.; Arce, M.D.; Napolitano, F.R.; Troiani, H.E.; Alonso, J.A.; Saleta, M.E.; González, M.A.; Cuello, G.J.; Fernández-Díaz, M.T.; Sainz, M.P.; Bonanos, N.; Jimenez, C.E.; Giebeler, L.; Figueroa, S.J.A.; Caneiro, A.; Serquis, A.C.; Mogni, L.V.: Revisiting the Crystal Structure of BaCe_0.4Zr_0.4Y_0.2O_3-δ Proton Conducting Perovskite and Its Correlation with Transport Properties. ACS Applied Energy Materials 3 (2020), p. 2881-2892
  doi: 10.1021/acsaem.9b02498
  Open Access (external provider)
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  Benkert, A.; Blum, M.; Meyer, F.; Wilks, R.G.; Yang, W.; Bär, M.; Reinert, F.; Heske, C.; Weinhardt, L.: Setup for in situ investigation of gases and gas/solid interfaces by soft x-ray emission and absorption spectroscopy. Review of Scientific Instruments 85 (2014), p. 015119/1-5
  doi: 10.1063/1.4862059
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  Benkert, A.; Meyer, F.; Hauschild, D.; Blum, M.; Yang, W.; Wilks, R. G.; Baer, M.; Reinert, F.; Heske, C.; Weinhardt, L.: Isotope Effects in the Resonant Inelastic Soft X-ray Scattering Maps of Gas-Phase Methanol. The Journal of Physical Chemistry A 120 (2016), p. 2260–2267
  doi: 10.1021/acs.jpca.6b02636
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  Blum, M.; Odelius, M.; Weinhardt, L.; Pookpanratana, S.; Bär, M.; Zhang, Y.; Fuchs, O.; Yang, W.; Umbach, E.; Heske, C.: Ultrafast Proton Dynamics in Aqueous Amino Acid Solutions Studied by Resonant Inelastic Soft X-ray Scattering. The Journal of Physical Chemistry B 116 (2012), p. 13757-13764
  doi: 10.1021/jp302958j
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  Blum, M.; Weinhardt, L.; Fuchs, O.; Bär, M.; Zhang, Y.; Weigand, M.; Krause, S.; Pookpanratana, S.; Hofmann, T.; Yang, W.; Denlinger, J.D.; Umbach, E.; Heske, C.: Solid and liquid spectroscopic analysis (SALSA) -- a soft x-ray spectroscopy endstation with a novel flow-through liquid cell. Review of Scientific Instruments 80 (2009), p. 123102/1-6
  doi: 10.1063/1.3257926
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  Bodenstein-Dresler, L.C.W.; Kama, A.; Frisch, J.; Hartmann, C.; Itzhak, A.; Wilks, R.G.; Cahen, D.; Bär, M.: Prospect of making XPS a high-throughput analytical method illustrated for a Cu_xNi_1-xO_y combinatorial material library. RSC Advances 12 (2022), p. 7996-8002
  doi: 10.1039/d1ra09208a
  Open Access
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  Bombsch, J.; Avancini, E.; Carron, R.; Handick, E.; Garcia-Diez, R.; Hartmann, C.; Félix, R.; Abou-Ras, D.; Ueda, S.; Wilks, R.G.; Bär, M.: Unraveling the Impact of Combined NaF/RbF Postdeposition Treatments on the Deeply Buried Cu(In,Ga) Se₂/Mo Thin-Film Solar Cell Interface. Advanced Energy & Sustainability Research 2 (2021), p. 2100101/1-9
  doi: 10.1002/aesr.202100101
  Open Access
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  Bombsch, J.; Avancini, E.; Carron, R.; Handick, E.; Garcia-Diez, R.; Hartmann, C.; Félix, R.; Ueda, S.; Wilks, R.G.; Bär, M.: NaF/RbF-Treated Cu(In,Ga)Se₂ Thin-Film Solar Cell Absorbers: Distinct Surface Modifications Caused by Two Different Types of Rubidium Chemistry. ACS Applied Materials & Interfaces 12 (2020), p. 34941-34948
  doi: 10.1021/acsami.0c08794
  Open Access (external provider)
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  Bombsch, Jakob: Surface and interface properties of chalcopyrite-based solar cell structures as revealed by photoelectron spectroscopy. , FAU Erlangen-Nürnberg, 2021
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  Braig, C.; Löchel, H.; Rehanek, J.; Firsov, A.; Brzhezinskaya, M.; Erko, A.: Reflection zone plate concept for resonant inelastic x-ray scattering spectrometry. Applied Optics 56 (2017), p. 515-520
  doi: 10.1364/AO.56.000515
  Open Access
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  Braig, C.; Sokolov, A.; Wilks, R.; Kozina, X.; Kunze, T.; Bjeoumikhova, S.; Thiel, M.; Erko, A.; Bär, M.: Polycapillary-boosted instrument performance in the extreme ultraviolet regime for inverse photoemission spectroscopy. Optics Express 25 (2017), p. 31840-31852
  doi: 10.1364/OE.25.031840
  Open Access
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  Braig, C.; Sokolov, A.; Wilks, R.G.; Kozina, X.; Kunze, T.; Bjeoumikhova, S.; Thiel, M.; Erko, A.; Bär, M.: Erratum : Polycapillary-boosted instrument performance in the extreme ultraviolet regime for inverse photoemission spectroscopy: erratum. Optics Express 30 (2022), p. 34935-34937
  doi: 10.1364/oe.473152
  Open Access
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  Brunken, S.; Wollgarten, M.; Ellmer, K.: Analysis of the early stages of the rapid, nickel-assisted crystallization of WS₂ films. Journal of Applied Physics 120 (2016), p. 165307/1-4
  doi: 10.1063/1.4966166
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  Cao, J.; Jafta, C.J.; Gong, J.; Ran, Q.; Lin, X.; Felix, R.; Wilks, R.G.; Bär, M.; Yuan, J.; Ballauff, M.; Lu, Y.: Synthesis of Dispersible Mesoporous Nitrogen-Doped Hollow Carbon Nanoplates with Uniform Hexagonal Morphologies for Supercapacitors. ACS Applied Materials & Interfaces 8 (2016), p. 29628-29636
  doi: 10.1021/acsami.6b08946
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  Chen, D.; Barreau, M.; Turczyniak-Surdacka, S.; Sobczak, K.; Strawski, M.; Salle, A.L.G.L.; Efimenko, A.; Teschner, D.; Petit, C.; Zafeiratos, S.: Ceria nanoparticles as promoters of CO2 electroreduction on Ni/YSZ: An efficient preparation strategy and insights into the catalytic promotion mechanism. Nano Energy 101 (2022), p. 107564/1-16
  doi: 10.1016/j.nanoen.2022.107564
  Open Access
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  Chernysheva, E.; Srour, W.; Philippe, B.; Baris, B.; Chenot, S.; Felix Duarte, R.; Gorgoi, M.; Cruguel, H.; Rensmo, H.; Montigaud, H.; Jupille, J.; Cabailh, G.; Grachev, S.; Lazzari, R.: Band alignment at Ag/ZnO(0001) interfaces: A combined soft and hard x-ray photoemission study. Physical Review B 97 (2018), p. 235430/1-15
  doi: 10.1103/PhysRevB.97.235430
  Open Access (external provider)
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  Choubrac, L.; Bär, M.; Kozina, X.; Félix, R.; Wilks, R.G.; Brammertz, G.; Levcenko, S.; Arzel, L.; Barreau, N.; Harel, S.; Meuris, M.; Vermang, B.: Sn Substitution by Ge: Strategies to Overcome the Open-Circuit Voltage Deficit of Kesterite Solar Cells. ACS Applied Energy Materials 3 (2020), p. 5830-5839
  doi: 10.1021/acsaem.0c00763
  Open Access (external provider)
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  Das, C.; Roy, R.; Kedia, M.; Kot, M.; Zuo, W.; Félix, R.; Sobol, T.; Flege, J.I.; Saliba, M.: Unraveling the Role of Perovskite in Buried Interface Passivation. ACS Applied Materials & Interfaces 15 (2023), p. 56500–56510
  doi: 10.1021/acsami.3c13085
  Open Access
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  Doubaji, S.; Philippe, B.; Saadoune, I.; Gorgoi, M.; Gustafsson, T.; Solhy, A.; Valvo, M.; Rensmo, H.; Edstrom, K.: Passivation Layer and Cathodic Redox Reactions in Sodium-Ion Batteries Probed by HAXPES. ChemSusChem 9 (2016), p. 97–108
  doi: 10.1002/cssc.201501282
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  Duncan, D.A.; Kephart, J.M.; Horsley, K.; Blum, M.; Mezher, M.; Weinhardt, L.; Haeming, M.; Wilks, R.G.; Hofmann, T.; Yang, W.; Bär, M.; Sampath, W.S.; Heske, C.: Characterization of Sulfur Bonding in CdS:O Buffer Layers for CdTe-based Thin-Film Solar Cells. ACS Applied Materials & Interfaces 7 (2015), p. 16382-16386
  doi: 10.1021/acsami.5b03503
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  Elovaara, T.; Tikkanen, J.; Granroth, S.; Majumdar, S.; Felix, R.; Huhtinen, H.; Paturi, P.: Mechanisms of photoinduced magnetization in Pr_0.6Ca_0.4MnO₃ studied above and below charge-ordering transition temperature. Journal of Physics: Condensed Matter 29 (2017), p. 425802/1-8
  doi: 10.1088/1361-648X/aa847b
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  Eriksson, S.K.; Hahlin, M.; Axnanda, S.; Crumlin, E.; Wilks, R.; Odelius, M.; Eriksson, A.I.K.; Liu, Z.; Ahlund, J.; Hagfeldt, A.; Starr, D.E.; Baer, M.; Rensmo, H.; Siegbahn, H.: In-Situ Probing of H₂O Effects on a Ru-Complex Adsorbed on TiO₂ Using Ambient Pressure Photoelectron Spectroscopy. Topics in Catalysis 59 (2016), p. 583-590
  doi: 10.1007/s11244-015-0533-3
  Open Access
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  Felix Duarte, Roberto: Analysis and Optimization of Interfaces in “Wide-Gap” Chalcopyrite-based Thin Film Solar Cell Devices. , BTU Cottbus-Senftenberg, 2015
  https://opus4.kobv.de/opus4-btu/files/3740/Roberto_Felix+Duarte_Dissertation.pdf
  Open Access
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  Félix, R.; Gorgoi, M.; Wilks, R.G.; Bär, M.: Hard x-ray photoelectron spectroscopy at a soft x-ray source: Present and future perspectives of hard x-ray photoelectron spectroscopy at BESSY II. Journal of Vacuum Science & Technology A 39 (2021), p. 063208/1-10
  doi: 10.1116/6.0001184
  Open Access
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  Félix, R.; Llobera-Vila, N.; Hartmann, C.; Klimm, C.; Hartig, M.; Wilks, R.; Bär, M.: Preparation and in-system study of SnCl2 precursor layers: towards vacuum-based synthesis of Pb-free perovskites. RSC Advances 8 (2018), p. 67-73
  doi: 10.1039/c7ra12172e
  Open Access
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  Félix, R.; Rehermann, C.; Liu, D.; Handick, E.; Hartmann, C.; Wilks, R.G.; Unger, E.; Bär, M.: Photoinduced phase segregation and degradation of perovskites revealed by x-ray photoelectron spectroscopy. In: Proceedings 46th IEEE Photovoltaic Specialists ConferenceIEEE, 2019. - ISBN 978-1-7281-0494-2, p. 2362-2367
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  Gaillard, N.; Cole, B.; Kaneshiro, J.; Miller, E.L.; Marsen, B.; Weinhardt, L.; Bär, M.; Heske, C.; Ahn, K.-S.; Yan, Y.; Al-Jassim M.M.: Improved current collection in WO₃:Mo/WO₃ bilayer photoelectrodes. Journal of Materials Research 25 (2010), p. 45-51
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  Gerlach, D.; Wilks, R.G.; Wippler, D.; Wimmer, M.; Lozac'h, M.; Félix, R.; Mück, A.; Meier, M.; Ueda, S.; Yoshikawa, H.; Gorgoi, M.; Lips, K.; Rech, B.; Sumiya, M.; Hüpkes, J.; Kobayashi, K.; Bär, M.: The silicon/zinc oxide interface in amorphous silicon-based thin-film solar cells: Understanding an empirically optimized contact. Applied Physics Letters 103 (2013), p. 023903/1-5
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  Gerlach, D.; Wippler, D.; Wilks, R.G.; Wimmer, M.; Lozac'h, M.; Felix, R.; Ueda, S.; Yoshikawa, H.; Lips, K.; Rech, B.; Sumiya, M.; Kobayashi, K.; Gorgoi, M.; Hüpkes, J.; Bär, M.: p-Type a-Si:H/ZnO:Al and μc-Si:H/ZnO:Al Thin-Film Solar Cell Structures-A Comparative Hard X-Ray Photoelectron Spectroscopy Study. IEEE Journal of Photovoltaics 3 (2013), p. 483-487
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  Grinter, D.C.; Venturini, F.; Ferrer, P.; van Spronsen, M.A.; Arrigo, R.; Quevedo Garzon, W.; Roy, K.; Large, A.I.; Kumar, S.; Held, G.: The Versatile Soft X-Ray (VerSoX) Beamline at Diamond Light Source. Synchrotron Radiation News 35 (2022), p. 39-47
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  Hages, C.J.; Levcenco, S.; Miskin, C.K.; Alsmeier, J.H.; Abou-Ras, D.; Wilks, R.G.; Bär, M.; Unold, T.; Agrawal, R.: Improved performance of Ge-alloyed CZTGeSSe thin-film solar cells through control of elemental losses. Progress in Photovoltaics 23 (2015), p. 376–384
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  Handick, E.; Reinhard, P.; Alsmeier, J.-H.; Köhler, L.; Pianezzi, F.; Krause, S.; Gorgoi, M.; Ikenaga, E.; Koch, N.; Wilks, R.G.; Buecheler, S.; Tiwari, A.N.; Bär, M.: Potassium Postdeposition Treatment-Induced Band Gap Widening at Cu(In,Ga)Se₂ Surfaces – Reason for Performance Leap? ACS Applied Materials & Interfaces 7 (2015), p. 27414-27420
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  Handick, E.; Reinhard, P.; Wilks, R.G.; Pianezzi, F.; Félix, R.; Gorgoi, M.; Kunze, T.; Buecheler, S.; Tiwari, A.N.; Bär, M.: NaF/KF post-deposition treatments and their influence on the structure of Cu(In,Ga)Se₂ absorber surfaces. In: IEEE 43rd Photovoltaic Specialists Conference (PVSC), 2016IEEE, 2016. - ISBN 978-1-5090-2725-5, p. 17-21
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  Handick, E.; Reinhard, P.; Wilks, R.G.; Pianezzi, F.; Kunze, T.; Kreikemeyer-Lorenzo, D.; Weinhardt, L.; Blum, M.; Yang, W.; Gorgoi, M.; Ikenaga, E.; Gerlach, D.; Ueda, S.; Yamashita, Y.; Chikyow, T.; Heske, C.; Buecheler, S.; Tiwari, A.N.; Bär, M.: Formation of a K-In-Se Surface Species by NaF/KF Postdeposition Treatment of Cu(In,Ga)Se₂ Thin-Film Solar Cell Absorbers. ACS Applied Materials & Interfaces 9 (2017), p. 3581-3589
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  Handick, Evelyn: Surface and Interface Characterization by X-ray and Electron Spectroscopies - Revealing the Peculiarities of Cu(In,Ga)Se₂ Chalcopyrite and CH₃NH₃PbI_3-xCl_x Perovskite-based Thin-film Solar Cell Structures. , Cottbus, Brandenburgische Technische Universität (BTU), Diss., 2016
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  Hanks, D.; Weir, M.; Horsley, K.; Hofmann, T.; Weinhardt, L.; Bär, M.; Barricklow, K.; Kobyakov, P.; Sampath, W.; Heske, C.: Photoemission Study of CdTe Surfaces After Low-Energy Ion Treatments. In: 38th IEEE Photovoltaic Specialists Conference (PVSC 2012) : Austin, Texas, USA, 3 - 8 June 2012.Piscataway, NJ: IEEE, 2012. - ISBN 978-1-467-30064-3, p. 000396-000405
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  Hartmann, C.; Brandt, R.E.; Baranowski, L.L.; Köhler, L.; Handick, E.; Félix, R.; Wilks, R.G.; Zakutayev, A.; Buonassisi, T.; Bär, M.: Chemical and electronic structure of the heavily intermixed (Cd,Zn)S:Ga/CuSbS₂ interface. Faraday Discussions 239 (2022), p. 130-145
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  Hartmann, C.; Gupta, S.; Bendikov, T.; Kozina, X.; Kunze, T.; Félix, R.; Hodes, G.; Wilks, R.G.; Cahen, D.; Bär, M.: Impact of SnF₂ addition on the chemical and electronic surface structure of CsSnBr₃. ACS Applied Materials & Interfaces 12 (2020), p. 12353-12361
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  Hartmann, C.; Sadoughi, G.; Felix, R.; Handick, E.; Klemm, H.W.; Peschel, G.; Madej, E.; Fuhrich, A.B.; Liao, X.; Raoux, S.; Abou-Ras, D.; Wargulski, D.; Schmidt, Th.; Wilks, R.G.; Snaith, H.; Bär, M.: Spatially-resolved insight into the chemical and electronic structure of solution processed perovskites – why to (not) worry about pin-holes. Advanced Materials Interfaces 5 (2018), p. 1701420/1-9
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  Hartmann, Claudia: Surface and interface characterization of CH₃NH₃PbI_3–xCl_x and CsSnBr₃ perovskite based thin-film solar cell structures. , Cottbus, Brandenburgische Technische Universität (BTU), Diss., 2018
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  Hase, H.; O'Neill, K.; Frisch, J.; Opitz, A.; Koch, N.; Salzmann, I.: Unraveling the Microstructure of Molecularly Doped Poly(3-hexylthiophene) by Thermally Induced Dedoping. The Journal of Physical Chemistry C 122 (2018), p. 25893-25899
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  Hauschild, D.; Meyer, F.; Benkert, A.; Kreikemeyer-Lorenzo, D.; Dalibor, T.; Palm, J.; Blum, M.; Yang, W.; Wilks, R.G.; Bär, M.; Reinert, F.; Heske, C.; Weinhardt, L.: Improving performance by Na doping of a buffer layer-chemical and electronic structure of the In_xS_y:Na/CuIn(S,Se)₂ thin-film solar cell interface. Progress in Photovoltaics 26 (2018), p. 359-366
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  Hauschild, D.; Meyer, F.; Benkert, A.; Kreikemeyer-Lorenzo, D.; Pohlner, S.; Palm, J.; Blum, M.; Yang, W.; Wilks, R.G.; Bär, M.; Heske, C.; Weinhardt, L.; Reinert, F.: Annealing-Induced Effects on the Chemical Structure of the In₂S₃/Culn(S,Se)₂ Thin-Film Solar Cell Interface. The Journal of Physical Chemistry C 119 (2015), p. 10412-10416
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  Herrera, G.; Jiménez-Mier, J.; Wilks, R.; Moewes, A.; Yang, W.; Denlinger, J.: Excited states in yttrium orthovanadate YVO₄ measured by soft X-ray absorption spectroscopy. Journal of Materials Science 48 (2013), p. 6437-6444
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  Heske, C.; Weinhardt, L.; Bär, M.: X-Ray and Electron Spectroscopy Studies of Oxide Semiconductors for Photoelectrochemical Hydrogen Production. In: Vayssieres, L. [Ed.] : On solar hydrogen & nanotechnologySingapore: Wiley, 2009. - ISBN 978-0-470-82397-2, p. 143-161
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  Hofmann, T.; Yu, T.H.; Folse, M.; Weinhardt, L.; Bär, M.; Zhang, Y.; Merinov, B.V.; Myers, D.J.; Goddard, W.A.; Heske, C.: Using Photoelectron Spectroscopy and Quantum Mechanics to Determine d-Band Energies of Metals for Catalytic Applications. The Journal of Physical Chemistry C 116 (2012), p. 24016-24026
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  Hofmann, T.; Yu, T.H.; Folse, M.; Weinhardt, L.; Bär, M.; Zhang, Y.; Merinov, B.V.; Myers, D.J.; Goddard, W.A.; Heske, C.: Reply to "Comment on 'Using Photoelectron Spectroscopy and Quantum Mechanics to Determine d-Band Energies of Metals for Catalytic Applications'". The Journal of Physical Chemistry C 117 (2013), p. 6916-6917
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  Hongtao, Y.; Siebert, A.; Mei, S.; Garcia-Diez, R.; Felix, R.; Quan, T.; Xu, Y.; Frisch, J.; Wilks, R.; Bär, M.; Pei, C.; Lu, Y.: Electrochemical Realization of 3D Interconnected MoS3/PPy Nanowire Frameworks as Sulfur-Equivalent Cathode Materials for Li-S Batteries. Energy & Environmental Materials 7 (2024), p. e12539/1-9
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  Horsley, K.; Beal, R.J.; Wilks, R.G.; Blum, M.; Haeming, M.; Hanks, D.A.; Weir, M.G.; Hofmann, T.; Weinhardt, L.; Bär, M.; Potter, B.G.; Heske, C.: Impact of annealing on the chemical structure and morphology of the thin-film CdTe/ZnO interface. Journal of Applied Physics 116 (2014), p. 024312/1-12
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  Horsley, K.; Pookpanratana, S.; Krause, S.; Hofmann, T.; Blum, M.; Weinhardt, L.; Bär, M.; George, K.; Van Duren, J.; Jackrel, D.; Heske, C.: Electronic and chemical properties of non-vacuum deposited chalcopyrite solar cells. In: IEEE [Ed.] : 37th IEEE Photovoltaic Specialists Conference, Washington, June 19-24, 2011Piscataway, NJ, 2011. - ISBN 978-1-4244-9965-6, p. 000374-000378
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  Hsieh, T.E.; Frisch, J.; Wilks, R.G.; Bär, M.: Unravelling the Surface Oxidation-Induced Evolution of the Electronic Structure of Gallium. ACS Applied Materials & Interfaces 15 (2023), p. 47725–47732
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  Hsieh, T.E.; Maisel, S.; Wittkämper, H.; Frisch, J.; Steffen, J.; Wilks, R.G.; Papp, C.; Görling, A.; Bär, M.: Unraveling the Effect of Rh Isolation on Shallow d States of Gallium-Rhodium Alloys. The Journal of Physical Chemistry C 127 (2023), p. 20484-20490
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  Iqbal, Z.; Félix, R.; Musiienko, A.; Thiesbrummel, J.; Köbler, H.; Gutierrez-Partida, E.; Gries, T.W.; Hüsam, E.; Saleh, A.; Wilks, R.G.; Zhang, J.; Stolterfoht, M.; Neher, D.; Albrecht, S.; Bär, M.; Abate, A.; Wang, Q.: Unveiling the Potential of Ambient Air Annealing for Highly Efficient Inorganic CsPbI3 Perovskite Solar Cells. Journal of the American Chemical Society 146 (2024), p. 4642-4651
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  Jäckle, S.; Liebhaber, M.; Niederhausen, J.; Büchele, M.; Félix, R.; Wilks, R.; Baer, M.; Lips, K.; Christiansen, S.: Unveiling the hybrid n-Si/PEDOT:PSS interface. ACS Applied Materials & Interfaces 8 (2016), p. 8841–8848
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  Jeschull, F.; Kataev, E.; Panasenko, I.; Njel, C.; Félix, R.; Maibach, J.: Why Half-Cell Samples Provide Limited Insight Into the Aging Mechanisms of Potassium Batteries. Advanced Energy Materials early view (2024), p. 2403811
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  Jeyachandran, Y. L.; Meyer, F.; Benkert, A.; Bär, M.; Blum, M.; Yang, W.; Reinert, F.; Heske, C.; Weinhardt, L.; Zharnikov, M.: Investigation of the Ionic Hydration in Aqueous Salt Solutions by Soft X-ray Emission Spectroscopy. The Journal of Physical Chemistry B 120 (2016), p. 7687-7695
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  Jeyachandran, Y.L.; Meyer, F.; Nagarajan, S.; Benkert, A.; Bär, M.; Blum, M.; Yang, Y.; Reinert, F.; Heske, C.; Weinhardt, L.; Zharnikov, M.: Ion-solvation-induced molecular reorganization in liquid water probed by resonant inelastic soft x-ray scattering. The Journal of Physical Chemistry Letters 5 (2014), p. 4143-4148
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  Jimenez, C.; Paeplow, M.; Kamm, P.; Neu, T.; Klaus, M.; Wagener, G.; Banhart, J.; Genzel, C.; Garci­a-Moreno, F.: Simultaneous X-ray radioscopy/tomography and energy-dispersive diffraction applied to liquid aluminium alloy foams. Journal of Synchrotron Radiation 25 (2018), p. 1790-1796
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  Klaproth, T.; Aswartham, S.; Shemerliuk, Y.; Selter, S.; Janson, O.; Van Den Brink, J.; Büchner, B.; Knupfer, M.; Pazek, S.; Mikhailova, D.; Efimenko, A.; Hayn, R.; Savoyant, A.; Gubanov, V.; Koitzsch, A.: Origin of the Magnetic Exciton in the van der Waals Antiferromagnet NiPS₃. Physical Review Letters 131 (2023), p. 256504/1-7
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  Köhler, Leonard: Surface and interface study of kesterite-based and related thin-film solar cell structures. , Cottbus, Brandenburgische Technische Universität (BTU), Diss., 2017
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  Lauermann, I.; Bär, M.; Fischer, C.-H.: Synchrotron-based spectroscopy for the characterization of surfaces and interfaces in chalcopyrite thin-film solar cells. Solar Energy Materials and Solar Cells 95 (2011), p. 1495-1508
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  Lehmann, J.; Lehmann, S.; Lauermann, I.; Rissom, T.; Kaufmann, C.A.; Lux-Steiner, M.C.; Bär, M.; Sadewasser, S.: Reliable wet-chemical cleaning of natively oxidized high-efficiency Cu(In,Ga)Se₂ thin-film solar cell absorbers. Journal of Applied Physics 116 (2014), p. 233502/1-11
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  Leon, A.; Fiedler, A.; Blum, M.; Benkert, A.; Meyer, F.; Yang, W.; Bär, M.; Scheiba, F.; Ehrenberg, H.; Weinhardt, L.; Heske, C.: Valence Electronic Structure of Li₂O₂, Li₂O, Li₂CO₃, and LiOH Probed by Soft X-ray Emission Spectroscopy. The Journal of Physical Chemistry C 121 (2017), p. 5460-5466
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  Leon, A.; Fiedler, A.; Blum, M.; Yang, W.; Bär, M.; Scheiba, F.; Ehrenberg, H.; Heske, C.; Weinhardt, L.: Electrolyte Stability and Discharge Products of an Ionic-Liquid-Based Li-O2 Battery Revealed by Soft X Ray Emission Spectroscopy. The Journal of Physical Chemistry C 123 (2019), p. 30827-30832
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  Lewis, T.; Winter, B.; Stern, A.C.; Bär, M.D.; Mundy, C.J.; Tobias, D.J.; Hemminger, J.C.: Dissociation of Strong Acid Revisited: X-ray Photoelectron Spectroscopy and Molecular Dynamics Simulations of HNO₃ in Water. The Journal of Physical Chemistry B 115 (2011), p. 9445 - 9451
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  Liao, X.; Jeong, A.R.; Wilks, R.G.; Wiesner, S.; Rusu, M.; Bär, M.: X-ray irradiation induced effects on the chemical and electronic properties of MoO₃ thin films. Journal of Electron Spectroscopy and Related Phenomena 212 (2016), p. 50–55
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  Liao, X.; Jeong, A.R.; Wilks, R.G.; Wiesner, S.; Rusu, M.; Felix, R.; Xiao, T.; Hartmann, C.; Bär, M.: Tunability of MoO₃ thin-film properties due to annealing – in-situ monitored by hard x-ray photoemission. ACS Omega 4 (2019), p. 10985-10990
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  Lips, K.; Schulze, T. F.; Starr, D.E.; Bär, M.; Wilks, R.G.; Fenske, F.; Ruske, F.; Reiche, M.; van de Krol, R.; Reichardt, G.; Schäfers, F.; Hendel, S.; Follath, R.; Bahrdt, J.; Peredkov, S.; DeBeer, S.; Hävecker, M.; Knop-Gericke, A.; Rau, B.; Kaufmann, C.A.; Schlatmann, R.; Schlögl, R.; Rech, B.; Raoux, S.: EMIL: The energy materials in-situ laboratory Berlin - a novel characterization facility for photovoltaic and energy materials. In: Proceedings of the 31st European Photovoltaic Solar Energy Conference and Exhibition - Hamburg 2015Munich: WIP, 2015. - ISBN 3-936338-39-6, p. 1AO.2.1/25-28
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  Lips, K.; Starr, D.; Bär, M.; Schulze, T.; Fenske, F.; Christiansen, S.; van de Krol, R.; Raoux, S.; Reichardt, G.; Schäfers, F.; Hendel, S.; Follath, R.; Bahrdt, J.; Scheer, M.; Wüstefeld, G.; Kuske, P.; Hävecker, M.; Knop-Gerickce, A.; Schlögl, R.; Rech, B.: EMIL: The Energy Materials In Situ Laboratory Berlin. In: IEEE 40th Photovoltaic Specialist Conference (PVSC) 2014 : Denver, Colorado, USA, 8 - 13 June 2014IEEE, 2014. - ISBN 978-1-4799-4398-2, p. 698-700
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  Liu, C.; Félix, R.; Forberich, K.; Du, X.; Heumüller, T.; Matt, G.J.; Gu, E.; Wortmann, J.; Zhao, Y.; Cao, Y.; He, Y.; Ying, L.; Hauser, A.; Oszajca, M.F.; Hartmeier, B.; Rossier, M.; Lüchinger, N.A.; Liu, Y.-S.; Guo, J.; Nie, K.; Wilks, R.G.; Bachmann, J.; Bär, M.; Li, N.; Brabec, C.J.: Utilizing the unique charge extraction properties of antimony tin oxide nanoparticles for efficient and stable organic photovoltaics. Nano Energy 89 (2021), p. 106373/1-10
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  Mu, R.; Steigert, A.; Lin, N.; Wilks, R.; Baer, M.; Zhang, Y.: The chemical structure of the ZnO/SiC heterointerface as revealed by electron spectroscopies. Journal of Physics D 48 (2015), p. 305304/1-7
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