Dresden 2003 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 20: POSTER A
CPP 20.71: Poster
Montag, 24. März 2003, 19:00–21:00, ZEU/250
Optoelectronic organic devices with nanostructured active layers — •Thomas Kietzke1, Dieter Neher1, Rivelino Montenegro2, Katharina Landfester2, Ulrich Scherf3, and Roland Guentner3 — 1University of Potsdam, Institute of Physics, Am Neuen Palais 10, D-14469 Potsdam — 2Max Planck Institute of Colloids and Interfaces, Research Campus Golm, D-14424 Golm — 3Bergische Universitaet Gesamthochschule Wuppertal, Department of Chemistry, Gaussstr. 20, D-42097 Wuppertal
Layers of conjugated polymers deposited from organic solvents are incorporated as active layer in a variety of optoelectronic devices like light emitting diodes (LEDs) and solar cells. We show that it is also possible to prepare these kind of devices solely from aqueous dispersions obtained by the miniemulsion process. The size of the dispersed particles can be controlled between 30 and 500 nanometers. Optoelectronic devices have been prepared by spin coating the dispersions on ITO substrates. We show that LEDs containing layers of theses nanoparticles show similar characteristics as devices prepared from organic solvents. Since the layers are deposited from water, it is also possible to prepare multilayers devices with clear defined interfaces which is not possible by conventional solution processing if both polymers are soluble in the same solvent. Furthermore these semiconducting polymer nanospheres allow the preparation of polymer blend films where the phase separation can be controlled simply by mixing dispersions with the desired particle diameter. First results on solar cells based on this approach are presented.