Berlin 2012 – scientific programme

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HL: Fachverband Halbleiterphysik

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

HL 92.8: Poster

Thursday, March 29, 2012, 16:00–19:00, Poster D

Micro-patterned, hydrothermally grown ZnO nanowire arrays for light-emitting devices — •Jonas Conradt^1,2, Marco Braun^1,2, Mario Hauser^1,2, Julian Fischer³, Torsten Beck^1,2, Janos Sartor^1,2, and Heinz Kalt^1,2 — ¹Karlsruhe Institute of Technology (KIT), Institute for Applied Physics (AP), Karlsruhe, Germany — ²Karlsruhe Institute of Technology (KIT), Center for Functional Nanostructures (CFN), Karlsruhe, Germany — ³Karlsruhe Institute of Technology (KIT), Institut für Angewandte Materialien, Karlsruhe, Germany

Hydrothermal, aqueous synthesis represents a simple and low-cost method easily adaptable to industrial scale for the synthesis of ZnO nanostructures on various substrates, including flexible polymer foils, inorganic semiconductors and organic layers. We report on a micro-patterning technique for hydrothermally grown ZnO nanowire arrays using a femtoliter droplet spotter. By selectively depositing ZnO nanocrystals, which act as nuclei during the latter growth of the wires, almost arbitrary patterns can be plotted using the nanowires, with a dot size of less than 20 µ m. Blue light-emitting diodes, based on micro-patterned ZnO nanowire arrays grown on p-doped GaN, are built, characterized and discussed.