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Alexander Colsmann LTI

Priv.-Doz. Dr.-Ing. Alexander Colsmann

Optoelektronik - Abteilungsleiter Organische Photovoltaik
Raum: 311 im MZE
Tel.: +49 721 608-48587
Fax: +49 721 608-42590
alexander colsmannXed9∂kit edu

Materialwissenschaftliches Zentrum für Energiesysteme (MZE)
Straße am Forum 7, Geb. 30.48
76131 Karlsruhe



Short CV

Alexander Colsmann studied physics at the Ludwig-Maximilians-Universität, Munich, where he received his diploma in 2003. He worked on his diploma thesis “Light emission and transistor effect in organic semiconductors” in the group of Prof. Jochen Feldmann. In 2003 he joined the Optoelectronics group of Prof. Uli Lemmer at the University of Karlsruhe (TH). In 2008 he was awarded his PhD for his thesis “Charge carrier transport layers for efficient organic semiconductor devices”. Since then he has been leading the organic photovoltaics research group at the Light Technology Institute at the Karlsruhe Institute of Technology (KIT). In 2012 the German Federal Ministry of Education and Research (BMBF) awarded a 4.3 Mio. Euro early career researcher grant to Alexander Colsmann that is dedicated to the research on organic tandem solar cells.

Long CV for download

LinkedIn Profile

 

Research Interests

Research interests include organic photovoltaics, tandem solar cells, semi-transparent solar cells for building integration, organic light emitting diodes (OLEDs), printed electronics, polymer electrodes, charge carrier transport layers, electrical doping of organic semiconductors, copper indium gallium diselenide (CIGS) and perovskite solar cells

www.lti.kit.edu/opv

 

Further Tasks

 

Publications

Publication list for download

Publication list on Google Scholar

Publication list on Research Gate

Publikationen


2018
Rapid experimental optimization of organic tandem solar cells: 200 absorber layer thickness combinations on a 4×4 cm2 substrate.
Glaser, K.; Beu, P.; Bahro, D.; Sprau, C.; Pütz, A.; Colsmann, A.
2018. Journal of materials chemistry / A, 6 (19), 9257–9263. doi:10.1039/c8ta00590g
Synthesis of D- π -A- π type benzodithiophene-quinoxaline copolymers by direct arylation and their application in organic solar cells.
Zimmermann, D.; Sprau, C.; Schröder, J.; Gregoriou, V. G.; Avgeropoulos, A.; Chochos, C. L.; Colsmann, A.; Janietz, S.; Krüger, H.
2018. Journal of polymer science / A, 56 (13), 1457–1467. doi:10.1002/pola.29027
An add-on organic green-to-blue photon-upconversion layer for organic light emitting diodes.
Reventlow, L. G. von; Bremer, M.; Ebenhoch, B.; Gerken, M.; Schmidt, T. W.; Colsmann, A.
2018. Journal of materials chemistry / C, 6 (15), 3845–3848. doi:10.1039/c7tc05649d
On the importance of ferroelectric domains for the performance of perovskite solar cells.
Rossi, D.; Pecchia, A.; Auf der Maur, M.; Leonhard, T.; Röhm, H.; Hoffmann, M. J.; Colsmann, A.; Carlo, A. D.
2018. Nano energy, 48, 20–26. doi:10.1016/j.nanoen.2018.02.049
Effects of alkyl side chains positioning and presence of fused aromatic units in the backbone of low-bandgap diketopyrrolopyrrole copolymers on the optoelectronic properties of organic solar cells.
Chochos, C. L.; Katsouras, A.; Drakopoulou, S.; Miskaki, C.; Krassas, M.; Tzourmpakis, P.; Kakavelakis, G.; Sprau, C.; Colsmann, A.; Squeo, B. M.; Gregoriou, V. G.; Kymakis, E.; Avgeropoulos, A.
2018. Journal of polymer science / A, 56 (1), 138–146. doi:10.1002/pola.28901
2017
Enhanced thermal stability of organic solar cells comprising ternary D-D-A bulk-heterojunctions.
Landerer, D.; Mertens, A.; Freis, D.; Droll, R.; Leonhard, T.; Schulz, A. D.; Bahro, D.; Colsmann, A.
2017. npj flexible electronics, 1 (1), Art.Nr. 11. doi:10.1038/s41528-017-0011-z
Relating Structure to Efficiency in Surfactant-Free Polymer/Fullerene Nanoparticle-Based Organic Solar Cells.
Gärtner, S.; Clulow, A. J.; Howard, I. A.; Gilbert, E. P.; Burn, P. L.; Gentle, I. R.; Colsmann, A.
2017. ACS applied materials & interfaces, 9 (49), 42986–42995. doi:10.1021/acsami.7b15601
OLED Luminaires : Device Arrays with 99.6% Geometric Fill Factor Structured by Femtosecond Laser Ablation.
García, J. F.; Höfle, S.; Zhang, M.; Dlugosch, J.; Friedrich, T.; Wagner, S.; Colsmann, A.
2017. ACS applied materials & interfaces, 9 (43), 37898–37904. doi:10.1021/acsami.7b12356
Rational In Silico Design of an Organic Semiconductor with Improved Electron Mobility.
Friederich, P.; Gómez, V.; Sprau, C.; Meded, V.; Strunk, T.; Jenne, M.; Magri, A.; Symalla, F.; Colsmann, A.; Ruben, M.; Wenzel, W.
2017. Advanced materials, 1703505. doi:10.1002/adma.201703505
Transport-related triplet states and hyperfine couplings in organic tandem solar cells probed by pulsed electrically detected magnetic resonance spectroscopy.
Kraffert, F.; Bahro, D.; Meier, C.; Denne, M.; Colsmann, A.; Behrends, J.
2017. Journal of magnetic resonance, 282, 10–17. doi:10.1016/j.jmr.2017.06.015
Organic Solar Modules : Fully Doctor Bladed on Glass in Air.
Koppitz, M.; Hesse, N.; Landerer, D.; Graf von Reventlow, L.; Wegner, E.; Czolk, J.; Colsmann, A.
2017. Energy technology. doi:10.1002/ente.201600666
Solar Glasses : A Case Study on Semitransparent Organic Solar Cells for Self-Powered, Smart, Wearable Devices.
Landerer, D.; Bahro, D.; Röhm, H.; Koppitz, M.; Mertens, A.; Manger, F.; Denk, F.; Heidinger, M.; Windmann, T.; Colsmann, A.
2017. Energy technology, 5 (11), 1936–1945. doi:10.1002/ente.201700226
Surfactant-free synthesis of sub-stoichiometry tungsten oxide nanoparticles and their use as anode buffer layers in organic solar cells.
Brütsch, L.; Czolk, J.; Popescu, R.; Gerthsen, D.; Colsmann, A.; Feldmann, C.
2017. Solid state sciences, 69, 50–55. doi:10.1016/j.solidstatesciences.2017.05.010
Ferroelectric domains in methylammonium lead iodide perovskite thin-films.
Röhm, H.; Leonhard, T.; Hoffmann, M. J.; Colsmann, A.
2017. Energy & environmental science, 10 (4), 950–955. doi:10.1039/C7EE00420F
Beyond Donor-Acceptor (D-A) Approach : Structure-Optoelectronic Properties-Organic Photovoltaic Performance Correlation in New D-A₁-D-A₂ Low-Bandgap Conjugated Polymers.
Chochos, C. L.; Drakopoulou, S.; Katsouras, A.; Squeo, B. M.; Sprau, C.; Colsmann, A.; Gregoriou, V. G.; Cando, A.-P.; Allard, S.; Scherf, U.; Gasparini, N.; Kazerouni, N.; Ameri, T.; Brabec, C. J.; Avgeropoulos, A.
2017. Macromolecular rapid communications, 38 (7), Art. Nr. 1600720. doi:10.1002/marc.201600720
p-Doping of polystyrene polymers with attached functional side-groups from solution.
Schneider, T.; Limberg, F.; Yao, K.; Armin, A.; Jürgensen, N.; Czolk, J.; Ebenhoch, B.; Friederich, P.; Wenzel, W.; Behrends, J.; Krüger, H.; Colsmann, A.
2017. Journal of materials chemistry / C, 5 (3), 770–776. doi:10.1039/c6tc02346k
Thermo-cleavable poly(fluorene-benzothiadiazole) to enable solution deposition of multi-layer organic light emitting diodes.
Höfle, S.; Zhang, M.; Dlugosch, J.; Kuhn, M.; Hamburger, M.; Colsmann, A.
2017. Organic electronics, 42, 355–360. doi:10.1016/j.orgel.2016.12.060
2016
Highly Efficient, Mechanically Flexible, Semi-transparent Organic Solar Cells Doctor Bladed from Non-halogenated Solvents.
Czolk, J.; Landerer, D.; Koppitz, M.; Nass, D.; Colsmann, A.
2016. Advanced Materials Technologies, 1 (9), Art. Nr. 1600184. doi:10.1002/admt.201600184
1-Ethynyl Ethers as Efficient Thermal Crosslinking System for Hole Transport Materials in OLEDs.
Limberg, F. R. P.; Schneider, T.; Höfle, S.; Reisbeck, F.; Janietz, S.; Colsmann, A.; Krüger, H.
2016. Advanced functional materials, 26 (46), 8505–8513. doi:10.1002/adfm.201603862
Fabrication of polymer solar cells from organic nanoparticle dispersions by doctor blading or ink-jet printing.
Sankaran, S.; Glaser, K.; Gärtner, S.; Rödlmeier, T.; Sudau, K.; Hernandez-Sosa, G.; Colsmann, A.
2016. Organic electronics, 28, 118–122. doi:10.1016/j.orgel.2015.10.011
A DNA-Fullerene Conjugate as a Template for Supramolecular Chromophore Assemblies: Towards DNA-Based Solar Cells.
Ensslen, P.; Gärtner, S.; Glaser, K.; Colsmann, A.; Wagenknecht, H.-A.
2016. Angewandte Chemie / International edition, 55 (5), 1904–1908. doi:10.1002/anie.201509332
Multipass inkjet printed planar methylammonium lead iodide perovskite solar cells.
Mathies, F.; Abzieher, T.; Hochstuhl, A.; Glaser, K.; Colsmann, A.; Paetzold, U. W.; Hernandez-Sosa, G.; Lemmer, U.; Quintilla, A.
2016. Journal of materials chemistry / A, 4 (48), 19207–19213. doi:10.1039/C6TA07972E
Enhanced electron extraction from solution processed organic solar cells employing rhodamine B doped fullerene layers.
Schneider, T.; Gärtner, S.; Ebenhoch, B.; Behrends, J.; Colsmann, A.
2016. Synthetic metals, 221, 201–205. doi:10.1016/j.synthmet.2016.09.003
n-Doping of organic semiconductors for enhanced electron extraction from solution processed solar cells using alkali metals.
Schneider, T.; Czolk, J.; Landerer, D.; Gärtner, S.; Puetz, A.; Bruns, M.; Behrends, J.; Colsmann, A.
2016. Journal of materials chemistry / A, 4 (38), 14703–14708. doi:10.1039/c6ta04770j
Probing the Diameter Limit of Single Walled Carbon Nanotubes in SWCNT: Fullerene Solar Cells.
Pfohl, M.; Glaser, K.; Graf, A.; Mertens, A.; Tune, D. D.; Puerckhauer, T.; Alam, A.; Wei, L.; Chen, Y.; Zaumseil, J.; Colsmann, A.; Krupke, R.; Flavel, B. S.
2016. Advanced energy materials. doi:10.1002/aenm.201600890
Seeing Down to the Bottom: Nondestructive Inspection of All-Polymer Solar Cells by Kelvin Probe Force Microscopy.
Cui, Z.; Sun, J.; Landerer, D.; Sprau, C.; Thelen, R.; Colsmann, A.; Hölscher, H.; Ma, W.; Chi, L.
2016. Advanced materials interfaces, 3 (18), Art.Nr.:1600446. doi:10.1002/admi.201600446
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
Tandem organic solar cells revisited.
Bahro, D.; Koppitz, M.; Colsmann, A.
2016. Nature photonics, 10 (6), 354–355. doi:10.1038/nphoton.2016.96
Understanding the angle-independent photon harvesting in organic homo-tandem solar cells.
Mertens, A.; Mescher, J.; Bahro, D.; Koppitz, M.; Colsmann, A.
2016. Optics Express, 24 (10), A898-A906. doi:10.1364/OE.24.00A898
Organic solar cells with graded absorber layers processed from nanoparticle dispersions.
Gärtner, S.; Reich, S.; Bruns, M.; Czolk, J.; Colsmann, A.
2016. Nanoscale, 8 (12), 6721–6727. doi:10.1039/c6nr00080k
Performance Enhancement of Polymer-Free Carbon Nanotube Solar Cells via Transfer Matrix Modeling.
Pfohl, M.; Glaser, K.; Ludwig, J.; Tune, D. D.; Dehm, S.; Kayser, C.; Colsmann, A.; Krupke, R.; Flavel, B. S.
2016. Advanced Energy Materials, 6 (1), 1501345. doi:10.1002/aenm.201501345
2015
Modeling approach to derive the anisotropic complex refractive index of polymer:fullerene blends for organic solar cells utilizing spectroscopic ellipsometry.
Klein, M. F. G.; de Medeiros, G. Q. G.; Kapetana, P.; Lemmer, U.; Colsmann, A.
2015. Journal of photonics for energy, 5 (1), Art. Nr.: 057204. doi:10.1117/1.JPE.5.057204
Tertiary carbonate side chains: Easily tunable thermo-labile breaking points for controlling the solubility of conjugated polymers.
Kuhn, M.; Ludwig, J.; Marszalek, T.; Adermann, T.; Pisula, W.; Muellen, K.; Colsmann, A.; Hamburger, M.
2015. Chemistry of materials, 27 (7), 2678–2686. doi:10.1021/acs.chemmater.5b00549
Understanding the External Quantum Efficiency of Organic Homo-Tandem Solar Cells Utilizing a Three-Terminal Device Architecture.
Bahro, D.; Koppitz, M.; Mertens, A.; Glaser, K.; Mescher, J.; Colsmann, A.
2015. Advanced Energy Materials, 5 (22), 1501019. doi:10.1002/aenm.201501019
All-solution processed transparent organic light emitting diodes.
Zhang, M.; Höfle, S.; Czolk, J.; Mertens, A.; Colsmann, A.
2015. Nanoscale, 7 (47), 20009–20014. doi:10.1039/c5nr05820a
Combined XPS and ToF-SIMS characterization of solution processed organic light emitting diodes (OLEDs).
Bruns, M.; Hoefle, S.; Colsmann, A.
2015. 16th European Conference on Applications of Surface and Interface Analysis (ECASIA ’15), Granada, E, September 28 - October 1, 2015
Highly efficient polymer solar cells cast from non-halogenated xylene/anisaldehyde solution.
Sprau, C.; Buss, F.; Wagner, M.; Landerer, D.; Koppitz, M.; Schulz, A.; Bahro, D.; Schabel, W.; Scharfer, P.; Colsmann, A.
2015. Energy and Environmental Science, 8 (9), 2744–2752. doi:10.1039/c5ee01917f
Illumination angle and layer thickness influence on the photo current generation in organic solar cells: A combined simulative and experimental study.
Mescher, J.; Mertens, A.; Egel, A.; Kettlitz, S. W.; Lemmer, U.; Colsmann, A.
2015. AIP Advances, 5 (7), 077188/1–6. doi:10.1063/1.4928074
Organic Nanoparticles for an Eco-Friendly Fabrication of Organic Solar Cells from Alcoholic Dispersion.
Gärtner, S.; Christmann, M.; Sankaran, S.; Prinz, E.-M.; Penth, F.; Türeli, A. E.; Penth, B.; Baumstümmler, B.; Colsmann, A.
2015. Energy, Science and Technology 2015. The energy conference for scientists and researchers. Book of Abstracts, EST, Energy Science Technology, International Conference & Exhibition, 20-22 May 2015, Karlsruhe, Germany
Charge generation layers for solution processed tandem organic light emitting diodes with regular device architecture.
Höfle, S.; Bernhard, C.; Bruns, M.; Kübel, C.; Scherer, T.; Lemmer, U.; Colsmann, A.
2015. ACS applied materials & interfaces, 7, 8132–8137. doi:10.1021/acsami.5b00883
2014
Eco‐Friendly Fabrication of 4% Efficient Organic Solar Cells from Surfactant‐Free P3HT:ICBA Nanoparticle Dispersions.
Gärtner, S.; Christmann, M.; Sankaran, S.; Röhm, H.; Prinz, E.; Penth, F.; Pütz, A.; Türeli, A. E.; Penth, B.; Baumstümmler, B.; Colsmann, A.
2014. Advanced materials, 26 (38), 6653–6657. doi:10.1002/adma.201402360
Organic Tandem Solar Cells.
Glaser, K.; Pütz, A.; Mescher, J.; Bahro, D.; Colsmann, A.
2014. Organic Photovoltaics. Ed.: C. Brabec, 445–464, Wiley-VCH Verlag, Weinheim. doi:10.1002/9783527656912.ch14
π-Conjugated Polymer-Fullerene Covalent Hybrids via Ambient Conditions Diels-Alder Ligation.
Yameen, B.; Pürckhauer, T.; Ludwig, J.; Ahmed, I.; Altintas, O.; Fruk, L.; Colsmann, A.; Barner-Kowollik, C.
2014. Small, 10 (15), 3091–3098. doi:10.1002/smll.201303772
Simulation of semi-transparent organic tandem solar cells for solar shading.
Lemmer, U.; Mescher, J.; Kettlitz, S. W.; Christ, N.; Klein, M. F. G.; Pütz, A.; Mertens, A.; Colsmann, A.
2014. 14th International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD 2014) : Palma de Mallorca, Spain, 1 - 4 September 2014. Ed.: J. Piprek, 165–166, IEEE, Piscataway (NJ). doi:10.1109/NUSOD.2014.6935408
Design rules for semi-transparent organic tandem solar cells for window integration.
Mescher, J.; Kettlitz, S. W.; Christ, N.; Klein, M. F. G.; Puetz, A.; Mertens, A.; Colsmann, A.; Lemmer, U.
2014. Organic Electronics: physics, materials, applications, 15 (7), 1476–1480. doi:10.1016/j.orgel.2014.04.011
Enhanced Electron Injection into Inverted Polymer Light-Emitting Diodes by Combined Solution-Processed Zinc Oxide/Polyethylenimine Interlayers.
Höfle, S.; Schienle, A.; Bruns, M.; Lemmer, U.; Colsmann, A.
2014. Advanced materials, 26 (17), 2750–2754. doi:10.1002/adma.201304666
Solution Processed, White Emitting Tandem Organic Light-Emitting Diodes with Inverted Device Architecture.
Höfle, S.; Schienle, A.; Bernhard, C.; Bruns, M.; Lemmer, U.; Colsmann, A.
2014. Advanced materials, 26 (30), 5155–5159. doi:10.1002/adma.201400332
Influence of the Emission Layer Thickness on the Optoelectronic Properties of Solution Processed Organic Light-Emitting Diodes.
Höfle, S.; Lutz, T.; Egel, A.; Nickel, F.; Kettlitz, S. W.; Gomard, G.; Lemmer, U.; Colsmann, A.
2014. ACS photonics, 1 (10), 968–973. doi:10.1021/ph500186m
Morphology change and improved efficiency in organic photovoltaics via hexa-peri-hexabenzocoronene templates.
Dam, H. H.; Sun, K.; Hanssen, E.; White, J. M.; Marszalek, T.; Pisula, W.; Czolk, J.; Ludwig, J.; Colsmann, A.; Pfaff, M.; Gerthsen, D.; Wong, W. W. H.; Jones, D. J.
2014. ACS Applied Materials and Interfaces, 6 (11), 8824–8835. doi:10.1021/am5015666
Suppressing molecular aggregation in solution processed small molecule organic light emitting diodes.
Höfle, S.; Pfaff, M.; Do, H.; Bernhard, C.; Gerthsen, D.; Lemmer, U.; Colsmann, A.
2014. Organic Electronics: physics, materials, applications, 15 (1), 337–341. doi:10.1016/j.orgel.2013.11.015
2013
Solution-processed electrodes for efficient hybrid copper indium gallium diselenide thin film solar cells.
Reinhard, M.; Eckstein, R.; Sonntag, P.; Burkert, L.; Dimmler, B.; Lemmer, U.; Colsmann, A.
2013. 39th IEEE Photovoltaic Specialists Conference, PVSC 2013, Tampa, FL, United States, 16 - 21 June 2013, 3226–3228, IEEE, Piscataway (NJ). doi:10.1109/PVSC.2013.6745139
Tungsten oxide buffer layers fabricated in an inert sol-gel process at room-temperature for blue organic light-emitting diodes.
Höfle, S.; Bruns, M.; Strässle, S.; Feldmann, C.; Lemmer, U.; Colsmann, A.
2013. Advanced materials, 25 (30), 4113–4116. doi:10.1002/adma.201301627
N-Fused quinoxalines and benzoquinoxalines as attractive emitters for organic light emitting diodes.
Lindner, B. D.; Zhang, Y.; Höfle, S.; Berger, N.; Teusch, C.; Jesper, M.; Hardcastle, K. I.; Qian, X.; Lemmer, U.; Colsmann, A.; Bunz, U. H. F.; Hamburger, M.
2013. Journal of Materials Chemistry C, 1 (36), 5718–5724. doi:10.1039/c3tc30828f
Preparation of near-infrared absorbing composites comprised of conjugated macroligands on the surface of PbS nanoparticles.
Zhang, J.; Bahrig, L.; Puetz, A.; Kanelidis, I.; Lenkeit, D.; Pelz, S.; Hickey, S. G.; Klein, M. F. G.; Colsmann, A.; Lemmer, U.; Eychmüller, A.; Holder, E.
2013. Polymer (United Kingdom), 54 (21), 5525–5533. doi:10.1016/j.polymer.2013.08.038
Additiveinfluss auf die Strukturbildung in Polymer-Fulleren-Gemischen für Polymersolarzellen.
Buss, F.; Colsmann, A.; Lemmer, U.; Barrena, E.; Scharfer, P.; Schabel, W.
2013. Chemie - Ingenieur - Technik, 85 (9), 1457. doi:10.1002/cite.201250720
Synthesis and characterization of star-shaped donor-acceptor-donor structures.
Pelz, S.; Zhang, J.; Kanelidis, I.; Klink, D.; Hyzak, L.; Wulf, V.; Schmitz, O. J.; Gasse, J.-C.; Frahm, R.; Pütz, A.; Colsmann, A.; Lemmer, U.; Holder, E.
2013. European Journal of Organic Chemistry, (22), 4761–4769. doi:10.1002/ejoc.201300357
TIPS-tetracene- and TIPS-pentacene-annulated poly(norbornadiene)s: Synthesis and properties.
Porz, M.; Paulus, F.; Höfle, S.; Lutz, T.; Lemmer, U.; Colsmann, A.; Bunz, U. H. F.
2013. Macromolecular Rapid Communications, 34 (20), 1611–1617. doi:10.1002/marc.201300557
Monolithic hybrid tandem solar cells comprising copper indium gallium diselenide and organic subcells.
Reinhard, M.; Sonntag, P.; Eckstein, R.; Bürkert, L.; Bauer, A.; Dimmler, B.; Lemmer, U.; Colsmann, A.
2013. Applied Physics Letters, 103 (14). doi:10.1063/1.4824017
Solution-processed polymer-silver nanowire top electrodes for inverted semi-transparent solar cells.
Reinhard, M.; Eckstein, R.; Slobodskyy, A.; Lemmer, U.; Colsmann, A.
2013. Organic Electronics, 14 (01/2013), 273–277. doi:10.1016/j.orgel.2012.10.039
Inverted Semi-transparent Polymer Solar Cells with Transparency Color Rendering Indices approaching 100.
Czolk, J.; Pütz, A.; Kutsarov, D.; Reinhard, M.; Lemmer, U.; Colsmann, A.
2013. Advanced Energy Materials, 3 (3), 386–390. doi:10.1002/aenm.201200532
Cadmium-free copper indium gallium diselenide hybrid solar cells comprising a 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole buffer layer.
Reinhard, M.; Simon, C.; Kuhn, J.; Bürkert, L.; Cemernjak, M.; Dimmler, B.; Lemmer, U.; Colsmann, A.
2013. Applied Physics Letters, 102 (6), 063304. doi:10.1063/1.4792507
Eliminating RC-effects in transient photocurrent measurements on organic photodiodes.
Kettlitz, S.; Mescher, J.; Christ, N.; Nintz, M.; Valouch, S.; Colsmann, A.; Lemmer, U.
2013. IEEE Photonics Technology Letters (PTL), 25 (7), 682–685. doi:10.1109/LPT.2013.2247036
Carbazole-Phenylbenzotriazole Copolymers as Absorber Material in Organic Solar Cells.
Klein, M. F. G.; Pasker, F. M.; Kowarik, S.; Landerer, D.; Pfaff, M.; Isen, M.; Gerthsen, D.; Lemmer, U.; Höger, S.; Colsmann, A.
2013. Macromolecules, 46 (10), 3870–3878. doi:10.1021/ma400440q
Molybdenum oxide anode buffer layers for solution processed, blue phosphorescent small molecule organic light emitting diodes.
Höfle, S.; Do, H.; Mankel, E.; Pfaff, M.; Zhang, Z.; Bahro, D.; Mayer, T.; Jaegermann, W.; Gerthsen, D.; Feldmann, C.; Lemmer, U.; Colsmann, A.
2013. Organic electronics, 14 (7), 1820–1824. doi:10.1016/j.orgel.2013.04.017
Semitransparente organische Solarzellen mit sehr guter Farbneutralität.
Czolk, J.; Pütz, A.; Vogeler, H.; Lemmer, U.; Colsmann, A.
2013. Chancen der Energiewende : wissenschaftliche Beiträge des KIT zur 1. Jahrestagung des KIT-Zentrums Energie, 19.06.2012. Hrsg.: W. Breh, 125–130, KIT Scientific Publishing, Karlsruhe
2012
Nanomorphology of P3HT:PCBM-based Organic Solar Cells Analyzed by Low-Energy Scanning Transmission Electron Microscopy.
Pfaff, M.; Müller, E.; Müller, P.; Gerthsen, D.; Klein, M. G.; Colsmann, A.; Lemmer, U.
2012. Microscopy and microanalysis, 18 (S2), 1234–1235. doi:10.1017/S1431927612008021
Nanomorphology of P3HT:PCBM-based Organic Solar Cells Analyzed by Low-Energy Scanning Transmission Electron Microscopy.
Pfaff, M.; Klein, M. G.; Müller, E.; Müller, P.; Colsmann, A.; Lemmer, U.; Gerthsen, D.
2012. Microscopy and Microanalysis, 18 (S2), 1234–1235. doi:10.1017/S143192761201344X
Investigation of non-halogenated solvent mixtures for high throughput fabrication of polymer-fullerene solar cells.
Schmidt-Hansberg, B.; Sanyal, M.; Grossiord, N.; Galagan, Y.; Baunach, M.; Klein, M.; Colsmann, A.; Scharfer, P.; Lemmer, U.; Barrena, E.; Schabel, W.
2012. Solar Energy Materials and Solar Cells, 96, 195–201. doi:10.1016/j.solmat.2011.09.059
Poly(3-hexylselenophene) solar cells : Correlating the optoelectronic device performance and nanomorphology imaged by low-energy scanning Transmission electron microscopy.
Klein, M. F. G.; Pfaff, M.; Müller, E.; Czolk, J.; Reinhard, M.; Valouch, S.; Lemmer, U.; Colsmann, A.; Gerthsen, D.
2012. Journal of polymer science / B, 50 (3), 198–206. doi:10.1002/polb.22394
Inverted semi-transparent organic solar cells with spray coated, surfactant free polymer top-electrodes.
Colsmann, A.; Reinhard, M.; Kwon, T.-H.; Kayser, C.; Nickel, F.; Czolk, J.; Lemmer, U.; Clark, N.; Jasieniak, J.; Holmes, A. B.; Jones, D.
2012. Solar Energy Materials and Solar Cells, 98, 118–123. doi:10.1016/j.solmat.2011.10.016
Spatial mapping of photocurrents in organic solar cells comprising wedge-shaped absorber layers for an efficient material screening.
Nickel, F.; Sprau, C.; Klein, M. F. G.; Kapetana, P.; Christ, N.; Liu, X.; Klinkhammer, S.; Lemmer, U.; Colsmann, A.
2012. Solar Energy Materials and Solar Cells, 104, 18–22. doi:10.1016/j.solmat.2012.04.026
Oligomers Comprising 2-Phenyl-2H-Benzotriazole Building Blocks for Solution Processible Organic Photovoltaic Devices.
Klein, M. F. G.; Pasker, F.; Wettach, H.; Gadaczek, I.; Bredow, T.; Zilkens, P.; Voehringer, P.; Lemmer, U.; Höger, S.; Colsmann, A.
2012. The journal of physical chemistry <Washington, DC> / C, 116 (31), 16358–16364. doi:10.1021/jp3039384
Solution processed sodium chloride interlayers for efficient electron extraction from polymer solar cells.
Nickel, F.; Reinhard, M.; Zhang, Z.; Pütz, A.; Kettlitz, S. W.; Lemmer, U.; Colsmann, A.
2012. Applied Physics Letters, 101 (5), 053309/1–3. doi:10.1063/1.4742161
Influence of the spatial photocarrier generation profile on the performance of organic solar cells.
Mescher, J.; Christ, N.; Kettlitz, S. W.; Colsmann, A.; Lemmer, U.
2012. Applied Physics Letters, 101 (7), 073301/1–4. doi:10.1063/1.4745601
Solution processed small molecule organic interfacial layers for low dark current polymer photodiodes.
Valouch, S.; Hönes, C.; Kettlitz, S. W.; Christ, N.; Do, H.; Klein, M. F. G.; Kalt, H.; Colsmann, A.; Lemmer, U.
2012. Organic Electronics, 13 (11), 2727–2732. doi:10.1016/j.orgel.2012.07.044
Structure Formation in Low-Bandgap Polymer: Fullerene Solar Cell Blends in the Course of Solvent Evaporation.
Schmidt-Hansberg, B.; Klein, M. F. G.; Sanyal, M.; Buss, F.; Medeiros, G. Q. G. de; Munuera, C.; Vorobiev, A.; Colsmann, A.; P. Scharfer, P.; Lemmer, U.; Barrena, E.; Schabel, W.
2012. Macromolecules, 45 (19), 7948–7955. doi:10.1021/ma300945k
2011
Inverted organic solar cells comprising a solution-processed cesium fluoride interlayer.
Reinhard, M.; Harnisch, J.; Zhang, Z.-H.; Ahlswede, E.; Colsmann, A.; Lemmer, U.
2011. Applied Physics Letters, 98 (5), 053303/1–3. doi:10.1063/1.3548860
In Situ X-Ray Study of Drying-Temperature Influence on the Structural Evolution of Bulk-Heterojunction Polymer-Fullerene Solar Cells Processed by Doctor-Blading.
Sanyal, M.; Schmidt-Hansberg, B.; Klein, M. F. G.; Colsmann, A.; Munuera, C.; Vorobiev, A.; Lemmer, U.; Schabel, W.; Dosch, H.; Barrena, E.
2011. Advanced Energy Materials, 1 (3), 363–367. doi:10.1002/aenm.201100007
Effect of Photovoltaic Polymer/Fullerene Blend Composition Ratio on Microstructure Evolution during Film Solidification Investigated in Real Time by X-ray Diffraction.
Sanyal, M.; Schmidt-Hansberg, B.; Klein, M. F. G.; Munuera, C.; Vorobiev, A.; Colsmann, A.; Scharfer, P.; Lemmer, U.; Schabel, W.; Dosch, H.; Barrena, B.
2011. Macromolecules, 44 (10), 3795–3800. doi:10.1021/ma2000338
Efficient Semi-Transparent Organic Solar Cells with Good Transparency Color Perception and Rendering Properties.
Colsmann, A.; Pütz, A.; Bauer, A.; Hanisch, J.; Ahlswede, E.; Lemmer, U.
2011. Advanced Energy Materials, 1 (4), 599–603. doi:10.1002/aenm.201000089
Low-energy electron scattering in carbon-based materials analyzed by scanning transmission electron microscopy and its application to sample thickness determination.
Pfaff, M.; Müller, E.; Klein, M. F. G.; Colsmann, A.; Lemmer, U.; Krzyzanek, V.; Reichelt, R.; Gerthsen, D.
2011. Journal of Microscopy, 243 (1), 31–39. doi:10.1111/j.1365-2818.2010.03475.x
A dendronised polymer for bulk heterojunction solar cells.
Yu, J.; Lee, K. H.; Zhang, Y.; Klein, M. F. G.; Colsmann, A.; Lemmer, U.; Burn, P. L.; Lo, S.-C.; Meredith, P.
2011. Polymer Chemistry, 2 (11), 2668–2673. doi:10.1039/c1py00301a
Photovoltaic response to structural modifications on a series of conjugated polymers based on 2-aryl-2H-benzotriazoles.
Pasker, F. M.; Klein, M. F. G.; Sanyal, M.; Barrena, E.; Lemmer, U.; Colsmann, A.; Höger, S.
2011. Journal of Polymer Science. A: Polymer Chemistry, 49 (23), 5001–5011
Moving Through the Phase Diagram: Morphology Formation in Solution Cast Polymer-Fullerene-Blend Films for Organic Solar Cells.
Schmidt-Hansberg, B.; Sanyal, M.; Klein, M. F. G.; Pfaff, M.; Schnabel, N.; Jaiser, S.; Vorobiev, A.; Müller, E.; Colsmann, A.; Scharfer, P.; Gerthsen, D.; Lemmer, U.; Barrena, E.; Schabel, W.
2011. ACS Nano, 5 (11), 8579–8590. doi:10.1021/nn2036279
2010
Cathodes comprising highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) for semi-transparent polymer solar cells.
Nickel, F.; Pütz, A.; Reinhard, M.; Do, H.; Kayser, C.; Colsmann, A.; Lemmer, U.
2010. Organic Electronics, 11 (4), 535–538. doi:10.1016/j.orgel.2009.12.009
Deep blue organic light-emitting diodes based on triphenylenes.
Wettach, H.; Jester, S. S.; Colsmann, A.; Lemmer, U.; Rehmann, N.; Meerholz, K.; Höger, S.
2010. Synthetic metals, 160 (7/8), 691–700. doi:10.1016/j.synthmet.2010.01.003
Modular Synthesis and Electronic and Hole-Transport Properties of Monodisperse Oligophenothiazines.
Müller, T. J. J.; Franz, A. W.; Barkschat, C. S.; Sailer, M.; Meerholz, K.; Müller, D.; Colsmann, A.; Lemmer, U.
2010. Macromolecular Symposia, 287 (1), 1–7. doi:10.1002/masy.201050101
Organic Semiconductors for Thermoelectric Applications.
Scholdt, M.; Do, H.; Lang, J.; Gall, A.; Colsmann, A.; Lemmer, U.; Koenig, J.; Winkler, M.; Boettner, H.
2010. Journal of Electronic Materials, 39 (9), 1589–1592. doi:10.1007/s11664-010-1271-8
2009
In situ monitoring the drying kinetics of knife coated polymer-fullerene films for organic solar cells.
Schmidt-Hansberg, B.; Klein, M. F. G.; Peters, K.; Buss, F.; Pfeifer, J.; Walheim, S.; Colsmann, A.; Lemmer, U.; Scharfer, P.; Schabel, W.
2009. Journal of Applied Physics, 106 (12), 124501/1–7. doi:10.1063/1.3270402
Polymeric anodes from poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) for 3.5% efficient organic solar cells.
Lemmer, U.; Do, H.; Reinhard, M.; Vogeler, H.; Pütz, A.; Klein, M. F. G.; Colsmann, A.; Schabel, W.
2009. Thin Solid Films, 517 (20), 5900–5902
Plasma patterning of Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate) anodes for efficient polymer solar cells.
Lemmer, U.; Colsmann, A.; Stenzel, F.; Balthasar, G.; Do, H.
2009. Thin Solid Films, 517 (5), 1750–1752
Ladungstransportschichten für effiziente organische Halbleiterbauelemente. Dissertation.
Colsmann, A.
2009. Universitätsverlag Karlsruhe, Karlsruhe. doi:10.5445/KSP/1000010090
2006
Optimization of electron transport and cathode materials for efficient organic solar cells.
Lemmer, U.; Colsmann, A.; Junge, J.; Wellinger, T.; Kayser, C.
2006. Proceedings / Organic optoelectronics and photonics II, 3 - 6 April 2006, Strasbourg, France. Ed.: P. L. Heremans, 619220/1–5, SPIE, Bellingham (Wash.)
Organic tandem solar cells comprising polymer and small-molecule subcells.
Lemmer, U.; Colsmann, A.; Junge, J.; Kayser, C.
2006. Applied Physics Letters, 89 (20), 203506/1–3

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    Adv. Opt. Mater. 4, 1487-1493 (2016) [DOI]


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