Berlin 2008 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 36: Poster III
HL 36.8: Poster
Mittwoch, 27. Februar 2008, 16:30–19:00, Poster D
Characterization of organic photovoltaic cells in comparison with analytic simulations — •Christian Körner1,2, Florian Holch2, Achim Schöll2, Carsten Deibel1, Friedrich Reinert2, and Vladimir Dyakonov1 — 1Universität Würzburg, Experimentelle Physik VI, 97074 Würzburg — 2Universität Würzburg, Experimentelle Physik II, 97074 Würzburg
Electronic devices based on organic semiconductors receive a growing interest in fundamental and application related research. One reason is that organic thin film photovoltaic cells promise to offer a cost– and resource–efficient fabrication. In order to achieve higher efficiencies it is indispensable to better understand the fundamental processes within the solar cell and at the interfaces, such as charge–carrier generation, separation and transport.
The samples, composed of Copper–Phthalocyanine (CuPc) and C60 layers and sandwiched between an ITO–coated glass substrate and metal electrodes, are prepared via organic molecular beam deposition under clean and well defined conditions in ultra high vacuum. By in-situ measurements of the current–voltage characteristics, the influence of incident light power, temperature, and cathode material can be investigated in detail.
The experimental results will be discussed in comparison to an analytical simulation of the open–circuit voltage, in view of different models for the charge carrier injection at the electrodes.