Nano Archive

Fabrication and analysis of Cr-doped ZnO nanoparticles from the gas phase

Schneider, L and Zaitsev, S V and Jin, W and Kompch, A and Winterer, M and Acet, M and Bacher, G (2009) Fabrication and analysis of Cr-doped ZnO nanoparticles from the gas phase. Nanotechnology, 20 (13). 135604 (10pp).

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Official URL: http://stacks.iop.org/0957-4484/20/135604

Abstract

High quality Cr-doped ZnO nanoparticles from the gas phase were prepared and investigated with respect to their structural, optical and magnetic properties. The extended x-ray absorption fine structure and the x-ray absorption near edge structure of the particles verify that after nanoparticle preparation Cr is incorporated as Cr3+ at least partially on sites with a 4-fold oxygen configuration, most likely on a Zn site, into the wurtzite lattice. Despite the fact that Cr is known to act as an efficient non-radiative loss centre for near band gap emission (NBE), a pronounced NBE is obtained up to room temperature even for a nominal Cr concentration of 10 at.%. Annealing at 1000 degC results in a significant improvement of the photoluminescence efficiency and a reduced PL linewidth down to 2.9 meV at low temperatures while the structural and magnetic data indicate the formation of ZnCr2O4 clusters.

Item Type:Article
ID Code:5123
Deposited By:Prof. Alexey Ivanov
Deposited On:09 May 2009 00:21
Last Modified:09 May 2009 00:21

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