Regensburg 2007 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 46: Poster 2

HL 46.39: Poster

Thursday, March 29, 2007, 15:00–17:30, Poster A

Optical Characterization of Nanocrystalline ZnO Powders — •Felix Stelzl, Johannes Fallert, Robert Hauschild, Alexander Urban, Huijuan Zhou, Markus Wissinger, Mario Hauser, Claus Klingshirn, and Heinz Kalt — Universität Karlsruhe (TH), Karlsruhe, Germany

In recent times there has been an increasing interest in nanocrystalline ZnO powders, since they promise the future realisation of miocrolasers based upon random lasing [1]. Several commercially available powders have been investigated, as they offer a cheap and reproducible light emitting source in the ultraviolet range. These powders have different average particle sizes which vary from below 100 nm up to above 1 µm. Apart from stationary photoluminescence measurements, time resolved investigations have been conducted to reveal the luminescence dynamics. Furthermore numerical calculations of carrier densities and diffusion properties have been carried out to compliment the experimental results.
[1] H. Cao et al., APL 76, 2997 (2000)