Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Poster: Nanoparticles and Composite Materials
CPP 12.19: Poster
Montag, 11. März 2013, 17:30–19:30, Poster C
OLED structures utilizing silicon nanoparticles — Hans Volker Stegemann1, •Jens Theis1, Axel Lorke1, and Hartmut Wiggers2 — 1Fakultät für Physik and CENIDE, Universität Duisburg-Essen — 2Institut für Verbrennung und Gasdynamik and CENIDE, Universität Duisburg-Essen
We have fabricated electroluminescence devices based on silicon nanoparticles (Si-NP) and conducting polymers. The Si-NPs have been synthesized from the gas phase in a low-pressure microwave plasma using SiH4 as a precursor.
Two different sample designs were developed and characterized. For the first kind of samples, the NPs were embedded in a layer structure consisting of hole-conducting and electron-conducting polymers. For electrical contact an evaporated silver film was used as cathode and a transparent indium tin oxide (ITO) coated glass slide as anode. For the second sample structure, the NPs were embedded between two electrodes in a conducting polymer matrix. Here ITO/glass was used as anode. For the cathode different metals have been employed to investigate their influence on the luminescence.
Carrying out electroluminescence measurements, we obtain visible light emission for both sample structures. The spectra showed two broad bands which could be identified by additionally performed PL-measurements as the emission from the Si-NPs and the polymers, respectively.