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Michael Powalla LTI

Prof. Dr.-Ing. Michael Powalla

Leitung der Abteilung Dünnschichtphotovoltaik
Raum: 113
Tel.: +49 721 608 41997
Fax: +49 721 608 42590
michael powallaKxu4∂kit edu

Engesserstrasse 13, Geb. 30.34
76131 Karlsruhe

aktuelle Veranstaltungen
Titel Typ
Seminar (S)
Seminar (S)
Vorlesung (V)
Sprechstunde (Sprechst.)


Characterization of solution-grown and sputtered in (O,S) buffer layers in Cu(In,Ga)Se solar cells by analytical TEM.
Jin, X.; Schneider, R.; Popescu, R.; Hariskos, D.; Witte, W.; Powalla, M.; Gerthsen, D.
2020. Semiconductor science and technology, 35 (3), Art. Nr.: 034001. doi:10.1088/1361-6641/ab6159
2D/3D Heterostructure for Semitransparent Perovskite Solar Cells with Engineered Bandgap Enables Efficiencies Exceeding 25% in Four‐Terminal Tandems with Silicon and CIGS.
Gharibzadeh, S.; Hossain, I. M.; Fassl, P.; Nejand, B. A.; Abzieher, T.; Schultes, M.; Ahlswede, E.; Jackson, P.; Powalla, M.; Schäfer, S.; Rienäcker, M.; Wietler, T.; Peibst, R.; Lemmer, U.; Richards, B. S.; Paetzold, U. W.
2020. Advanced functional materials, 30 (19), Art. Nr.: 1909919. doi:10.1002/adfm.201909919
Hybrid chemical bath deposition-CdS/sputter-Zn(O,S) alternative buffer for Cu2ZnSn(S,Se)4 based solar cells editors-pick.
Kogler, W.; Schnabel, T.; Ahlswede, E.; Taskesen, T.; Gütay, L.; Hauschild, D.; Weinhardt, L.; Heske, C.; Seeger, J.; Hetterich, M.; Powalla, M.
2020. Journal of applied physics, 127 (16), 165301. doi:10.1063/1.5142550
Upscaling the fabrication routine of bioreplicated rose petal light harvesting layers for photovoltaic modules.
Fritz, B.; Hünig, R.; Guttmann, M.; Schneider, M.; Reza, K. M. S.; Salomon, O.; Jackson, P.; Powalla, M.; Lemmer, U.; Gomard, G.
2020. Solar energy, 201, 666–673. doi:10.1016/j.solener.2020.03.020
Universal Nanoparticle Wetting Agent for Upscaling Perovskite Solar Cells.
Schultes, M.; Giesbrecht, N.; Küffner, J.; Ahlswede, E.; Docampo, P.; Bein, T.; Powalla, M.
2019. ACS applied materials & interfaces, 11 (13), 12948–12957. doi:10.1021/acsami.8b22206
Structural and microchemical characterization of Cu(In,Ga)Se2 solar cells with solution-grown CdS, Zn(O,S), and Inx(O,S)y buffers.
Jin, X.; Popescu, R.; Pasha, A.; Schneider, R.; Hariskos, D.; Witte, W.; Powalla, M.; Gerthsen, D.
2019. Thin solid films, 671, 133–138. doi:10.1016/j.tsf.2018.12.012
Sputtered Transparent Electrodes (IO:H and IZO) with Low Parasitic Near-Infrared Absorption for Perovskite-Cu(In,Ga)Se₂ Tandem Solar Cells.
Schultes, M.; Helder, T.; Ahlswede, E.; Aygüler, M. F.; Jackson, P.; Paetel, S.; Schwenzer, J. A.; Hossain, I. M.; Paetzold, U. W.; Powalla, M.
2019. ACS applied energy materials, 2 (11), 7823–7831. doi:10.1021/acsaem.9b01224
Efficient All-Evaporated pin-Perovskite Solar Cells: A Promising Approach Toward Industrial Large-Scale Fabrication.
Abzieher, T.; Schwenzer, J. A.; Moghadamzadeh, S.; Sutterluti, F.; Hossain, I. M.; Pfau, M.; Lotter, E.; Hetterich, M.; Richards, B. S.; Lemmer, U.; Powalla, M.; Paetzold, U. W.
2019. IEEE journal of photovoltaics, 9 (5), 1249–1257. doi:10.1109/JPHOTOV.2019.2920727
Electron-Beam-Evaporated Nickel Oxide Hole Transport Layers for Perovskite-Based Photovoltaics.
Abzieher, T.; Moghadamzadeh, S.; Schackmar, F.; Eggers, H.; Sutterlüti, F.; Farooq, A.; Kojda, D.; Habicht, K.; Schmager, R.; Mertens, A.; Azmi, R.; Klohr, L.; Schwenzer, J. A.; Hetterich, M.; Lemmer, U.; Richards, B. S.; Powalla, M.; Paetzold, U. W.
2019. Advanced energy materials, 9 (12), Article no 1802995. doi:10.1002/aenm.201802995
Thin‐film solar cells exceeding 22% solar cell efficiency: An overview on CdTe-, Cu(In,Ga)Se2-, and perovskite-based materials.
Powalla, M.; Paetel, S.; Ahlswede, E.; Wuerz, R.; Wessendorf, C. D.; Magorian Friedlmeier, T.
2018. Applied physics reviews, 5 (4), 041602. doi:10.1063/1.5061809
Towards Inexpensive and Stable All-Evaporated Perovskite Solar Cells for Industrial Large-Scale Fabrication.
Abzieher, T.; Schwenzer, J. A.; Sutterlüti, F.; Pfau, M.; Lotter, E.; Het-Terich, M.; Lemmer, U.; Powalla, M.; Paetzold, U. W.
2018. 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018; Waikoloa Village; United States; 10 June 2018 through 15 June 2018, 2803–2807, IEEE, Piscataway (NJ). doi:10.1109/PVSC.2018.8547364
Energy yield of all thin-film perovskite/CIGS tandem solar modules.
Langenhorst, M.; Sautter, B.; Schmager, R.; Lehr, J.; Ahlswede, E.; Powalla, M.; Lemmer, U.; Richards, B. S.; Paetzold, U. W.
2018. Progress in photovoltaics, 27 (4), 290–298. doi:10.1002/pip.3091
Rubidium Fluoride Post-Deposition Treatment: Impact on the Chemical Structure of the Cu(In,Ga)Se2 Surface and CdS/Cu(In,Ga)Se2 Interface in Thin-Film Solar Cells.
Kreikemeyer-Lorenzo, D.; Hauschild, D.; Jackson, P.; Friedlmeier, T. M.; Hariskos, D.; Blum, M.; Yang, W.; Reinert, F.; Powalla, M.; Heske, C.; Weinhardt, L.
2018. ACS applied materials & interfaces, 10 (43), 37602–37608. doi:10.1021/acsami.8b10005
Suppression of interference effects in electroreflectance spectroscopy on Cu(In,mGa)(S, Se)₂ solar cell buffer layers.
Seeger, J.; Piesch, U.; Kiowski, O.; Hariskos, D.; Witte, W.; Powalla, M.; Eraerds, P.; Lechner, R.; Dalibor, T.; Kalt, H.; Hetterich, M.
2018. DPG-Frühjahrstagung der Sektion Kondensierte Materie gemeinsam mit der EPS, Fachverband Halbleiterphysik (2018), Berlin, Deutschland, 11.–16. März 2018
Thermodynamic limitations for alkali metals in Cu(In,Ga)Se2.
Hariskos, D.; Powalla, M.
2017. Journal of materials research, 32 (20), 3789–3800. doi:10.1557/jmr.2017.394
Advances in Cost-Efficient Thin-Film Photovoltaics based on Cu(In,Ga)Se2.
Powalla, M.; Paetel, S.; Hariskos, D.; Wuerz, R.; Kessler, F.; Lechner, P.; Wischmann, W.; Friedlmeier, T. M.
2017. Engineering, 3 (4), 445–451. doi:10.1016/J.ENG.2017.04.015
Impact of a RbF Postdeposition Treatment on the Electronic Structure of the CdS/Cu(In,Ga)Se2 Heterojunction in High-Efficiency Thin-Film Solar Cells.
Hauschild, D.; Kreikemeyer-Lorenzo, D.; Jackson, P.; Friedlmeier, T. M.; Hariskos, D.; Reinert, F.; Powalla, M.; Heske, C.; Weinhardt, L.
2017. ACS energy letters, 2 (10), 2383–2387. doi:10.1021/acsenergylett.7b00720
Scalable perovskite/CIGS thin-film solar module with power conversion efficiency of 17.8%.
Paetzold, U. W.; Jaysankar, M.; Gehlhaar, R.; Ahlswede, E.; Paetel, S.; Qiu, W.; Bastos, J.; Rakocevic, L.; Richards, B. S.; Aernouts, T.; Powalla, M.; Poortmans, J.
2017. Journal of materials chemistry / A, 5 (20), 9897–9906. doi:10.1039/C7TA01651D
Additive-Assisted Crystallization Dynamics in Two-Step Fabrication of Perovskite Solar Cells.
Abzieher, T.; Mathies, F.; Hetterich, M.; Welle, A.; Gerthsen, D.; Lemmer, U.; Paetzold, U. W.; Powalla, M.
2017. Physica status solidi / A, 214 (12), Art.Nr. 1700509. doi:10.1002/pssa.201700509
Effects of heavy alkali elements in Cu(In,Ga)Se2 solar cells with efficiencies up to 22.6%.
Jackson, P.; Wuerz, R.; Hariskos, D.; Lotter, E.; Witte, W.; Powalla, M.
2016. Physica status solidi / Rapid research letters, 10 (8), 583–586. doi:10.1002/pssr.201600199
A closer look at initial CdS growth on high-efficiency Cu(In, Ga)Se<inf>2</inf> absorbers using surface-sensitive methods.
Friedlmeier, T. M.; Jackson, P.; Kreikemeyer-Lorenzo, D.; Hauschild, D.; Kiowski, O.; Hariskos, D.; Weinhardt, L.; Heske, C.; Powalla, M.
2016. 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC), Portland, OR, USA, 5–10 June 2016, 0457–0461, IEEE, Piscataway (NJ). doi:10.1109/PVSC.2016.7749634
Preparation of Cu2ZnSnSe4 solar cells by low-temperature co-evaporation and following selenization.
Gao, C.; Schnabel, T.; Abzieher, T.; Ahlswede, E.; Powalla, M.; Hetterich, M.
2016. Applied physics letters, 108 (1), Art.Nr. 013901. doi:10.1063/1.4939445
Flower Power: Exploiting Plants’ Epidermal Structures for Enhanced Light Harvesting in Thin-Film Solar Cells.
Hünig, R.; Mertens, A.; Stephan, M.; Schulz, A.; Richter, B.; Hetterich, M.; Powalla, M.; Lemmer, U.; Colsmann, A.; Gomard, G.
2016. Advanced optical materials, 4 (10), 1487–1493. doi:10.1002/adom.201600046
Source and effects of sodium in solution-processed kesterite solar cells.
Abzieher, T.; Schnabel, T.; Hetterich, M.; Powalla, M.; Ahlswede, E.
2016. Physica status solidi / A, 213 (4), 1039–1049. doi:10.1002/pssa.201532619
Optoelectrical improvement of ultra-thin Cu(In,Ga)Se₂ solar cells through microstructured MgF₂ and Al₂O₃ back contact passivation layer.
Casper, P.; Hünig, R.; Gomard, G.; Kiowski, O.; Reitz, C.; Lemmer, U.; Powalla, M.; Hetterich, M.
2016. Physica status solidi / Rapid research letters, 10 (5), 376–380. doi:10.1002/pssr.201600018
Properties of Cu(In,Ga)Se2 solar cells with new record efficiencies up to 21.7%.
Jackson, P.; Hariskos, D.; Wuerz, R.; Kiowski, O.; Bauer, A.; Friedlmeier, T. M.; Powalla, M.
2015. Physica status solidi / Rapid research letters, 9 (1), 28–31. doi:10.1002/pssr.201409520
Epitaxial Cu2ZnSnSe4 layers by annealing of Sn/Cu/ZnSe(001) precursors on GaAs(001).
Krämmer, C.; Sachs, J.; Pfaffmann, L.; Musiol, T.; Lang, M.; Gao, C.; Gerthsen, D.; Kalt, H.; Powalla, M.; Hetterich, M.
2015. Thin Solid Films, 582, 158–161. doi:10.1016/j.tsf.2014.09.038
Fabrication of polycrystalline Cu2ZnSnSe4 layers with strongly preferential grain orientation via selenization of Sn/Cu/ZnSe(001)/GaAs(001) structures.
Krämmer, C.; Sachs, J.; Lang, M.; Pfaffmann, L.; Gao, C.; Gerthsen, D.; Kalt, H.; Powalla, M.; Hetterich, M.
2014. Applied Physics Letters, 104 (7), 071913. doi:10.1063/1.4866436
Three-dimensional reciprocal space profile of an individual nanocrystallite inside a thin-film solar cell absorber layer.
Slobodskyy, T.; Schroth, P.; Minkevich, A.; Grigoriev, D.; Fohtung, E.; Riotte, M.; Baumbach, T.; Powalla, M.; Lemmer, U.; Slobodskyy, A.
2013. Journal of Physics D: Applied Physics, 46 (47), 475104/1–5. doi:10.1088/0022-3727/46/47/475104
Cross sections of operating Cu(In,Ga)Se2 thin-film solar cells under defined white light illumination analyzed by Kelvin probe force microscopy.
Zhang, Z.; Hetterich, M.; Lemmer, U.; Powalla, M.; Hoelscher, H.
2013. Applied physics letters, 102 (2), 023903/1–6. doi:10.1063/1.4775679
Influence of the Ga Content on the Optical and Electrical Properties of CuIn1-xGaxSe2 Thin-Film Solar Cells.
Zhang, Z.; Witte, W.; Kiowski, O.; Lemmer, U.; Powalla, M.; Hölscher, H.
2013. 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC), June 3-8 2012, Austin, Texas. Volume 2, 1–5, IEEE, Piscataway (NJ). doi:10.1109/PVSC-Vol2.2012.6656798
Influence of the Ga content on the optical and electrical properties of CuIn₁₋ₓGaₓSe₂ thin-film solar cells.
Zhang, Z.; Witte, W.; Kiowski, O.; Lemmer, U.; Powalla, M.; Hölscher, H.
2013. IEEE journal of photovoltaics, 3 (2), 823–827. doi:10.1109/JPHOTOV.2012.2228297
Reevaluation of the beneficial effect of Cu(In,Ga)Se₂ grain boundaries using Kelvin probe force microscopy.
Zhang, Z.; Tang, X.; Kiowski, O.; Hetterich, M.; Lemmer, U.; Powalla, M.; Hölscher, H.
2012. Applied Physics Letters, 100 (20), 203903/1–4. doi:10.1063/1.4714905
Analysis of untreated cross sections of cu(In,Ga)Se₂ thin-film solar cells with varying Ga content using Kelvin probe force microscopy.
Zhang, Z.; Tang, X.; Lemmer, U.; Witte, W.; Kiowski, O.; Powalla, M.; Hölscher, H.
2011. Applied physics letters, 99, Art.Nr. 042111. doi:10.1063/1.3607954
Optical and charge transport properties of a CuIn₁₋ₓGaₓSe₂ solar cell cross section.
Slobodskyy, A.; Wang, D.; Scherer, T.; Kübel, C.; Zhang, Z.-H.; Müller, E.; Gerthsen, D.; Powalla, M.; Lemmer, U.
2010. Physical Review B, 82 (20), 201105/1–4. doi:10.1103/PhysRevB.82.201105
In-depth analysis of the CuIn1-xGaxSe2 film for solar cells, structural and optical characterization.
Slobodskyy, A.; Slobodskyy, T.; Ulyanenkova, T.; Doyle, S.; Powalla, M.; Baumbach, T.; Lemmer, U.
2010. Applied Physics Letters, 97 (25), Art.Nr.:251911. doi:10.1063/1.3529939
Thermocouples with insulating layers.
Gross, E.; Powalla, M.; Stoehrer, U.; Birkholz, U.
1990. In: Proceedings. 9th International Conference Thermoelectrics, Pasadena, USA 1990. S. 336-342