TU Dresden - Dresden Integrated Center for Applied Physics and Photonic Materials

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Basic Research on OLED and Organic Solar Cells - The IAPP (Institut fuer Angewandte Photophysik) is an institute within the Technische Universitaet Dresden with broad experience in the investigation of physical properties of organic molecules, and their application in organic optoelectronic devices, as organic light-emitting diodes, and organic solar cells. The topics span from the investigation of the molecular properties (using ultra-fast spectroscopy, scanning probe methods, optical characterization in vacuum, etc.), over the study of molecular epitaxy (in vacuum and from solution), to the preparation and electro-optical investigation of the above-mentioned optoelectronic devices. Special focus is on electrical doping for efficient organic devices, using novel molecular dopants. Using this technique, the institute has realized several world records in OLED efficiency. In addition to the experimental work, each of the topics is supported by theoretical calculations. We briefly discuss results of a comprehensive study of controlled n- and ptype doping of various molecular organic materials.


Our topic is the physics of organic thin films. We use them in novel electronic devices, such as organic light emitting diodes (OLED), organic solar cells and memory devices based on organic materials. For making devices with high efficiency, we employ knowledge on molecular doping which has been developed at IAPP within the last few years. Such doping is the base of the most efficient OLEDs world-wide, and it has further led to the foundation of our spin-off company Novaled, today a world market leader in the field of OLED technology. Currently, we are working in the development of high efficiency OLEDs for RGB display applications, as well as for a new generation of white lighting sources. Besides this, strong efforts are put to the development of organic solar cells, an alternative to conventional thin film solar cells. New device structures as well as new materials allow for a significant increase in power conversion efficiency. In parallel to these device-oriented topics we put also strong efforts to the basicunderstanding of charge and exciton transport in organic materials, as well as ontopics like organic-inorganic epitaxy, mixed organic-inorganic systems and ultra fast laser spectroscopy. The aim of our optical spectroscopy is to understand the microscopic nature of the excited states, the relaxation and energytransfer processes after photon absorption and the interaction of excitons with the strongly enhanced electromagnetic field inside microcavities.

Core Competence: University

Specializations: Organic Thin Films, Organic Opto-Electronics, OLED Technology, Organic Solar Cells

Business Fields: Semiconductor IndustryComputers, ElectronicsAutomotive Industry
research category: natural science
research discipline: physics

research focus: Organic Molecular Beam Epitaxy, Scanning Probe, Microscopy & Manipulation, Spectroscopy of Excitons, Organic Solarcells, Organic Light Emitting Diodes

research subjects: Parameterization by fitting of experimental spectra or quantum chemistry, Construction of model Hamiltonians, Exciton-exciton interaction at high excitation densities, Exciton transport and transfer processes in hetero systems, Luminescence and pump-probe anisotropy, Ultrafast relaxation processes, Ultrafast transmission dynamics of empty microcavities, Organic Vertical Cavity Surface Emitting Lasers (OVCSEL), new doping techniques, the synthesis of better organic dopants, Experimental Techniques, Alternative Sustrates, RGB OLEDs, White OLEDs, Doped organic charge transport layers

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