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).
Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.
Official URL: http://stacks.iop.org/0957-4484/20/135604
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.
|Deposited By:||Prof. Alexey Ivanov|
|Deposited On:||09 May 2009 00:21|
|Last Modified:||09 May 2009 00:21|
Repository Staff Only: item control page