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Michael Powalla LTI

Prof. Dr.-Ing. Michael Powalla

Room: 113
Phone: +49 721 608 41997
Fax: +49 721 608 42590
michael powallaSjy4∂kit edu

Engesserstrasse 13, Geb. 30.34
76131 Karlsruhe


Veranstaltungen im Sommersemester 2011
Titel Typ
Sprechstunde (Sprechst.)
Seminar (S)
Seminar (S)


Publikationen


2019
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 [in press].
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. 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
2018
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
2017
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
2016
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
2015
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
2014
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
2013
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
2012
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
2011
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
2010
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
1990
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