Regensburg 2007 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 46: Poster 2

HL 46.46: Poster

Donnerstag, 29. März 2007, 15:00–17:30, Poster A

Growth of ZnO Nanopillars in an Optical Furnace — •Tobias Röder, Günther M. Prinz, Anton Reiser, Martin Schirra, Martin Feneberg, Raoul Schneider, Klaus Thonke, and Rolf Sauer — Institut für Halbleiterphysik, Universität Ulm, 89069 Ulm

First results of ZnO nanopillar production in a new kind of optical furnace are presented. The furnace consists of two largely independent heating zones and allows heating rates of up to 1000°C/min with a maximum temperature around 1100°C. This enables us to investigate the influence of heating rates during the growth of ZnO nanostructures. The pillars are grown on a-plane sapphire substrates by a thermal-carbon process, in which a mixture of zinc oxide and graphite powder is used as source material. We obtained well aligned pillars of different densities with a variety of growth types such as vapor-liquid-solid (VLS) and vapor-solid (VS). The ZnO pillars were investigated by scanning electron microscopy (SEM), photoluminescence (PL) and spatially resolved cathodoluminescence spectroscopy (CL).