Berlin 2012 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 92: Poster Session: II-VI Semiconductors & ZnO and related Materials

HL 92.26: Poster

Donnerstag, 29. März 2012, 16:00–19:00, Poster D

Spectroscopic and Morphological Studies of Zinc Oxide Sprayed Films — •Iulia G. Korodi, Falko Seidel, Daniel Bülz, Ovidiu D. Gordan, and Dietrich R. T. Zahn — Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany

Nowadays, one way of producing "green" energy can be achieved via photovoltaic cells. For such devices, ZnO can be used as a transparent window, or if doped as a transparent electrode material. Moreover, its transparency and wide bandgap makes it suitable for future transparent electronics. In this work, highly pure (99.995 %) zinc acetylacetonate hydrate (Zn(acac)₂) was used as a precursor for obtaining ZnO layers. The Zn(acac)₂ powder was solved in ethanol and the saturated solution was sprayed on heated silicon substrates (T = 150^∘C) in a glove box under nitrogen (N₂) atmosphere. Three different treatments were applied to these samples with the purpose of achieving ZnO films: flashing with a Xenon lamp (in N₂ environment immediately after spraying), illumination with a UV lamp (in ambient atmosphere) and annealing on a heating plate (in ambient atmosphere). The observed changes in the films obtained after employing the three different post-spraying treatments were investigated using Spectroscopic Ellipsometry, UV-Raman Spectroscopy, Fourier Transform Infrared Spectroscopy and Atomic Force Microscopy techniques. The investigation was performed varying the number of the applied flashes, the time during illumination, and the annealing. The results of this study will be presented and discussed.