Longterm stability of efficient inverted P3HT:PCBM solar cells (2009)
Zimmermann, B., Würfel, U., Niggemann, M.
We report on the longterm stability of 1.5-3% efficient inverted P3HT:PCBM solar cells sealed with glass plates, which have been glued onto the solar cells. We employed two different electron contact...
High throughput testing platform for organic solar cells (2008)
Riede, M.K., Sylvester-Hvid, K.O., Glatthaar, M., Keegan, N., Ziegler, T., Zimmermann, B., ...
In this paper we present a high throughput testing setup for organic solar cells that is necessary for an efficient analysis of their behaviour. The setup comprises process parameter logging,...
Realization of ultrahigh photovoltages with organic photovoltaic nanomodules (2008)
Niggemann, M., Graf, W., Gombert, A.
The series interconnection of organic photovoltaic cells on the scale of several hundred nanometres results in 1390 interconnected elementary cells per mm. This organic photovoltaic nanomodule...
Light trapping in organic solar cells (2008)
Niggemann, M., Riede, M., Gombert, A., Leo, K.
One key problem in optimizing organic solar cells is to maximize the absorption of incident light and to keep the charge carrier transport paths as short as possible in order to minimize...
Glatthaar, M., Riede, M., Keegan, N., Sylvester-Hvid, K., Zimmermann, B., Niggemann, M., ...
The currentSvoltage characteristic and the performance of organic bulk-heterojunction solar cells are very sensitive to small variations in the production steps or environmental influences. In our...
Zimmermann, B., Glatthaar, M., Niggemann, M., Riede, M.K., Hinsch, A., Gombert, A.
Organic solar cells have the potential to make cheap photovoltaic devices feasible. In order to achieve this, material and production costs have to be minimised by using device architectures, which...
Sylvester-Hvid, K.O., Ziegler, T., Riede, M.K., Keegan, N., Niggemann, M., Gombert, A.
A nondestructive method for assessing the thickness of the photoactive layer in poly(3-hexyl-thiophene):1-(3-methoxy-carbonyl)propyl-1-phenyl-(6,6)C-61 (P3HT:PCBM) solar cells is reported. In the...
Efficiency limiting morphological factors of MDMO-PPV:PCBM plastic solar cells (2006)
Hoppe, H., Glatzel, T., Niggemann, M., Schwinger, W., Schaeffler, F., Hinsch, A., ...
Fundamental aspects of the influence of the nanomorphology in phase-separated conjugated polymer/fullerene bulk heterojunction blends are presented. A variety of experimental techniques were combined...
Functional microprism substrate for organic solar cells (2006)
Niggemann, M., Glatthaar, M., Lewer, P., Müller, C., Wagner, J., Gombert, A.
Datamining and analysis of the key parameters in organic solar cells (2006)
Riede, M., Liehr, A., Glatthaar, M., Niggemann, M., Zimmermann, B., Ziegler, T., ...
Hore, S., Nitz, P., Vetter, C., Prahl, C., Niggemann, M., Kern, R.
Spherical voids as light scattering centers in nanocrystalline TiO2 films were realized with polystyrene particles of diameter 400 run, thus enhancing the photovoltaic performance by 25% on large...
Impedance spectroscopy on organic bulk-heterojunction solar cells (2005)
Glatthaar, M., Mingirulli, N., Zimmermann, B., Ziegler, T., Kern, R., Niggemann, M., ...
We measured the electrical impedance spectra of organic bulk-heterojunction solar cells based on an absorber blend of poly(3-hexylthiophene) and [6,6]-phenyl C-61-butyric acid methyl ester. Comparing...
Organic solar cells using inverted layer sequence (2005)
Glatthaar, M., Niggemann, M., Zimmermann, B., Lever, P., Riede, M., Hinsch, A., ...
Hoppe, H., Glatzel, T., Niggemann, M., Hinsch, A., Lux-Steiner, M.C., Sariciftci, N.S.
We conducted a comprehensive Kelvin probe force microscopy (KPFM) study on a classical organic solar cell system consisting of MDMO-PPV/PCBM blends. The KPFM method yields the information of...
Electroabsorption studies of organic bulk-heterojunction solar cells (2005)
Zimmermann, B., Glatthaar, M., Niggemann, M., Riede, M., Hinsch, A.
Fabrication of interdigital nanoelectrodes for photo-voltaic devices (2005)
Diplomarbeit an der Albert-Ludwig-Universität Freiburg, Lehrstuhl für Prozeßtechnologie, Institut für Mikrosystemtechnik -IMTEK-. In Zusammenarbeit mit dem Fraunhofer-Institut für Solare...
Verfahren zur Herstellung von Mikrosieben (2004)
Gombert, A., Boerner, V., Robert, J., Gehrke, I., Blaesi, B., Niggemann, M., ...
WO2003091804 A UPAB: 20040102 NOVELTY - Preparation of microhole structures with application of a relief structure to a substrate surface by angular coating, the desired hole pattern of the relief...
Vorrichtung zur anisotropen Lichtstreuung sowie Verfahren zur Herstellung der Vorrichtung (2004)
Blaesi, B., Boerner, V., Gombert, A., Niggemann, M.
WO 200265167 A UPAB: 20021014 NOVELTY - Apparatus for scattering light comprises an array (1) of microlenses (11) and a diffuser (3). The lenses are arranged in a flat layer and have a numerical...
Niggemann, M., Gombert, A., Graf, W., Hinsch, A.
WO2004008553 A UPAB: 20040213 NOVELTY - The optoelectronic component has at least one layer of an electroconductive organic material (1) between at least 2 strip electrode pairs (P) formed by a...
Solarzelle sowie Verfahren zu deren Herstellung (2004)
Hinsch, A., Georg, A., Niggemann, M.
WO2003043100 A UPAB: 20030729 NOVELTY - Solar cell comprises a photovoltaic layer (A) made from organic, especially polymeric material which absorbs light and in which electron hole pairs can be...
Diffraction gratings and buried nano-electrodes - architectures for organic solar cells (2004)
Niggemann, M., Glatthaar, M., Gombert, A., Hinsch, A., Wittwer, V.
One limiting factor to the efficiency of the bulk heterojunction solar cell is the weak absorbance of the thin photoactive layer. The thickness is restricted by the small charge carrier mobility. Two...
Nanoscale morphology of conjugated polymer/fullerene-based bulk-heterojunction solar cells (2004)
Hoppe, H., Niggemann, M., Winder, C., Kraut, J., Hiesgen, R., Hinsch, A., ...
The relation between the nanoscale morphology and associated device properties in conjugated polymer/fullerene bulk-heterojunction "plastic solar cells" is investigated. We perform complementary...
Gombert, A., Bläsi, B., Bühler, C., Nitz, P., Mick, J., Hoßfeld, W., ...
With surface-relief structures, optical functions that are required for radiation power management such as antireflection, light trapping, or light distribution and redirection can be obtained for...
Mikrostrukturierte Substrate für flexible organische Solarzellen (2004)
Lewer, P., Fink, F., Niggemann, M.
Diplomarbeit an der Fachhochschule für Technik und Wirtschaft Berlin, Fachbereich I, Studiengang: Umwelttechnik / Regenerative Energien. Angefertigt am Fraunhofer-Institut für Solare Energiesysteme...
Replicated microstructures with optical functions in solar and display application (2003)
Gombert, A., Bläsi, B., Bühler, C., Nitz, P., Mick, J., Hossfeld, W., ...
Elektrische Modellierung von organischen Solarzellen (2003)
Glatthaar, M., Riede, M., Niggemann, M., Zimmermann, B., Hinsch, A., Luther, J.
Verfahren und Vorrichtung zur Herstellung eines Koppelgitters fuer einen Wellenleiter (2002)
Gombert, A., Niggemann, M., Lerchenmueller, H.
WO 200244771 A UPAB: 20020815 NOVELTY - The manufacturing method uses interference lithography in which two coherent light beams (3,4) are directed onto a photo-sensitive layer (2) applied to a...