Regensburg 2013 – scientific programme

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DS: Fachverband Dünne Schichten

DS 32: Poster Session IV: Atomic layer deposition; Organic thin films; Organic Electronics and Phototovoltaics; Organic Materials for Spintronics - from spinterface to devices; Thin film photovoltaic materials and solar cells

DS 32.33: Poster

Thursday, March 14, 2013, 17:00–20:00, Poster B2

Investigation of the interface between aluminum-doped zinc oxide sputtered on copper phthalocyanine thin films. — •Cathy Jodocy, Carolin Jacobi, and Matthias Wuttig — Institute of Physics (IA), RWTH Aachen University, 52056 Aachen, Germany

Organic based electronic devices are of considerable interest because of their wide range of possible applications and commercial potential. In optoelectronic devices such as organic solar cells, organic thin film transistors and organic light emitting diodes a transparent conductive top contact can be deposited onto an organic film. These inorganic/organic interfaces are responsible for injection or collection of charge carriers. Hence an understanding of the electronic structure of the interface region is crucial to improve the performance of these devices. In this study, thin films of the transparent conductive oxide (TCO) aluminum-doped zinc oxide (ZnO:Al) are deposited onto organic semiconductor layers by a dc magnetron sputtering process. Copper phthalocyanine (CuPc) is used as the organic donor material. Due to its very rigid crystal structure, it is supposed to withstand the impact of high kinetic energy particles generated during sputter deposition of the TCO. A detailed investigation of the interface between aluminum-doped zinc oxide and copper phthalocyanine is presented. The influence of the sputter deposition of the TCO layer onto the organic thin film is characterized with x-ray photoelectron spectroscopy and x-ray diffraction measurements.