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Dr. Michael Sommer

MS
Alumnus

Publications in the Thelakkat group

[1] Raithel, D., Simine, L., Pickel, S., Schötz, K., Panzer, F., Baderschneider, S., Schiefer, D., Lohwasser, R., Köhler, J., Thelakkat, M., Sommer, M., Köhler, A., Rossky, P.J. & Hildner, R. Direct observation of backbone planarization via side-chain alignment in single bulky-substituted polythiophenes. Proceedings of the National Academy of Sciences, 115(11), 2018.
[2] Spreitler, F., Sommer, M., Hollfelder, M., Thelakkat, M., Gekle, S. & Kohler, J. Unravelling the conformations of di-(perylene bisimide acrylate) by combining time-resolved fluorescence-anisotropy experiments and molecular modelling. Phys. Chem. Chem. Phys., 16:25959-25968, 2014.
[3] Bauer, P., Sommer, M., Thurn, J., Pärs, M., Köhler, J. & Thelakkat, M. A photoswitchable poly(3-hexylthiophene). Chem. Comm., 49:4637-4639, 2013.
[4] Goldberg-Oppenheimer, P., Kabra, D., Vignolini, S., Hüttner, S., Sommer, M., Neumann, K., Thelakkat, M. & Steiner, U. Hierarchical Orientation of Crystallinity by Block-Copolymer Patterning and Alignment in an Electric Field. Chem. Mater., 25:1063-1070, 2013.
[5] Balko, J., Sommer, M., Lohwasser, R., Thelakkat, M. & Thurn-Albrecht, T. Determination of the Crystallinity of Semicrystalline Poly(3-hexylthiophene) by Means of Wide-Angle X-ray Scattering. Macromolecules, 46:9642-9651, 2013.
[6] Kurz, R., Cobo, M., de Azevedo, E., Sommer, M., Wicklein, A., Thelakkat, M., Hempel, G. & Saalwächter, K. Avoiding Bias Effects in NMR Experiments for Heteronuclear Dipole–Dipole Coupling Determinations: Principles and Application to Organic Semiconductor Materials. ChemPhysChem, 14:3146-55, 2013.
[7] Kohn, P., Ghazaryan, L., Gupta, G., Sommer, M., Wicklein, A., Thelakkat, M. & Thurn-Albrecht, T. Thermotropic Behavior, Packing, and Thin Film Structure of an Electron Accepting Side-Chain Polymer. Macromolecules, 45:5676-5683, 2012.
[8] Spreitler, F., Sommer, M., Thelakkat, M. & Köhler, J. Conformational dynamics of di-(perylene bisimide acrylate) and its footprints in steady-state, time-resolved, and fluorescence-correlation spectroscopy. Phys. Chem. Chem. Phys., 14:7971-7980, 2012.
[9] Scharsich, C., Lohwasser, R., Sommer, M., Asawapirom, U., Scherf, U., Thelakkat, M., Neher, D. & Köhler, A. Control of aggregate formation in poly(3-hexylthiophene) by solvent, molecular weight, and synthetic method. J. Polym. Sci. B Polym. Phys., 50:442-453, 2012.
[10] Andringa, A., Roelofs, W., Sommer, M., Thelakkat, M., Kemerink, M. & de Leeuw, D. Localizing trapped charge carriers in NO2 sensors based on organic field-effect transistors. Appl. Phys. Lett., 101:153302, 2012.
[11] Sommer, M., Himmerlich, M., Wicklein, A., Krischok, S., Thelakkat, M. & Hoppe, H. Morphology controlled open circuit voltage in polymer solar cells. physica status solidi (RRL) – Rapid Research Letters, 5(7):247-249, WILEY-VCH Verlag, 2011.
[12] Haberkorn, N., Kim, S., Kim, K., Sommer, M., Thelakkat, M., Sohn, B. & Theato, P. Template-Assisted Fabrication of Highly Ordered Interpenetrating Polymeric Donor/Acceptor Nanostructures for Photovoltaic Applications. Macromol. Chem. Phys., 212:2142-2150, 2011.
[13] Hüttner, S., Sommer, M., Kohn, P., Hodgkiss, J., Thurn-Albrecht, T., Friend, R., Steiner, U. & Thelakkat, M. Tunable charge transport using supramolecular self-assembly of nanostructured crystalline block copolymers. ACS Nano, 5:3506-3515, 2011.
[14] Sommer, M., Huettner, S. & Thelakkat, M. Donor–Acceptor Block Copolymers with Nanoscale Morphology for Photovoltaic Applications. In Complex Macromolecular Systems II, 228:123-153, Springer Berlin Heidelberg, 2010.
[15] Sommer, M., Hüttner, S. & Thelakkat, M. Donor–acceptor block copolymers for photovoltaic applications. J. Mater. Chem., 20:10788-10797, 2010.
[16] Hüttner, S., Sommer, M., Steiner, U. & Thelakkat, M. Organic Field Effect Transistors from Triarylamine Side-chain Polymers. Appl. Phys. Lett., 96:73503, 2010.
[17] Barea, E., Garcia-Belmonte, G., Sommer, M., Hüttner, S., Bolink, H. & Thelakkat, M. Determination of charge carrier mobility of hole transporting polytriarylamine-based diodes. Thin Solid Films, 518:3351-3354, 2010.
[18] Pascui, O.F., Lohwasser, R., Sommer, M., Thelakkat, M., Thurn-Albrecht, T. & Saalwächter, K. High Crystallinity and Nature of Crystal−Crystal Phase Transformations in Regioregular Poly(3-hexylthiophene). Macromolecules, 43:9401-9410, 2010.
[19] Lang, A., Neubig, A., Sommer, M. & Thelakkat, M. NMRP versus “Click” Chemistry for the Synthesis of Semiconductor Polymers Carrying Pendant Perylene Bisimides. Macromolecules, 43:7001-7010, 2010.
[20] Wu, Z., Petzold, A., Henze, T., Thurn-Albrecht, T., Lohwasser, R., Sommer, M. & Thelakkat, M. Temperature and Molecular Weight Dependent Hierarchical Equilibrium Structures in Semiconducting Poly(3-hexylthiophene). Macromolecules, 43:4646-4653, 2010.
[21] Michael Sommer, S.H. & Thelakkat, M. Donor-Acceptor Diblock Copolymers for Photovoltaic Applications. J. Mater. Chem, 2010.
[22] Wicklein, A., Ghosh, S., Sommer, M., Würthner, F. & Thelakkat, M. Self-Assembly of Semiconductor Organogelator Nanowires for Photoinduced Charge Separation. ACS Nano, 3:1107-1114, 2009.
[23] King, S., Sommer, M., Huettner, S., Thelakkat, M. & Haque, S.A. Charge separation and recombination in self-organizing nanostructured donor-acceptor block copolymer films. J. Mater. Chem., 19:5436-5441, The Royal Society of Chemistry, 2009.
[24] Huttner, S., Sommer, M., Chiche, A., Krausch, G., Steiner, U. & Thelakkat, M. Controlled solvent vapour annealing for polymer electronics. Soft Matter, 5:4206-4211, The Royal Society of Chemistry, 2009.
[25] Sommer, M., Hüttner, S., Steiner, U. & Thelakkat, M. Influence of molecular weight on the solar cell performance of double-crystalline donor-acceptor block copolymers. Appl. Phys. Lett., 95:183308, 2009.
[26] Lang, A., Kogler, F., Sommer, M., Wiesner, U. & Thelakkat, M. Semiconductor Dendritic-Linear Block Copolymers by Nitroxide Mediated Radical Polymerization. Macromol. Rapid Comm., 30:1243-1248, 2009.
[27] Sommer, M., Lang, A. & Thelakkat, M. Crystalline–Crystalline Donor–Acceptor Block Copolymers. Angewandte Chemie International Edition, 47(41):7901-7904, WILEY-VCH Verlag, 2008.
[28] Hüttner, S., Sommer, M. & Thelakkat, M. n-type organic field effect transistors from perylene bisimide block copolymers and homopolymers. Applied Physics Letters, 92(9):-, 2008.
[29] Maria, S., Susha, A., Sommer, M., Rogach, A. & Thelakkat, M. Semiconductor Block Copolymer Nanocomposites with Lamellar Morphology via Self- Organization. Macromolecules, 41:6081-6088, 2008.
[30] Sommer, M., Hüttner, S., Wunder, S. & Thelakkat, M. Electron-Conducting Block Copolymers: Morphological, Optical, and Electronic Properties. Advanced Materials, 20(13):2523-2527, WILEY-VCH Verlag, 2008.
[31] Sommer, M., Lindner, S. & Thelakkat, M. Microphase-Separated Donor–Acceptor Diblock Copolymers: Influence of HOMO Energy Levels and Morphology on Polymer Solar Cells. Advanced Functional Materials, 17(9):1493-1500, WILEY-VCH Verlag, 2007.
[32] Sommer, M. & Thelakkat, M. Synthesis, Characterization and Application of Donor-Acceptor Block Copolymers in Nanostructured Bulk Heterojunction Solar Cells. Eur. Phys. J. Appl. Phys., 36:245-249, 2006.