Berlin 2012 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 92: Poster Session: II-VI Semiconductors & ZnO and related Materials
HL 92.7: Poster
Thursday, March 29, 2012, 16:00–19:00, Poster D
Microstructures and photoluminescence properties of one-dimensional ZnO nanostructures — •Peter Heß1, Yong Lei1,2, Martin Peterlechner1, and Gerhard Wilde1 — 1Inst. f. Materialphysik, WWU Münster — 2Inst. f. Physik & IMN (ZIK) MacroNano, TU Ilmenau
One-dimensional (1-D) ZnO nanostructures were systematically investigated concerning their microstructures and their photoluminescence properties. The main focus of this work is on the assembly of nanowires of different shapes and sizes by a CVD process to investigate their properties. For the Chemical Vapour Deposition (CVD) system ZnO/C mixtures was used as sources, Au-coated silicon or sapphire as substrates, and an argon and oxygen gas flow as a distributor and oxidation source. Depending on the growth conditions during the CVD process, different kinds of 1D and 2D ZnO nanostructures were obtained. The morphology of the ZnO nanostructures was checked by SEM and the photoluminescence properties were investigated using a spectrometer. Additionally, the crystalline structures, the growth direction, and the lattice spacing of ZnO nanostructures were characterized using TEM. Also the effects of different annealing temperatures and durations on the green band photoluminescence were investigated.