The effects of postdeposition annealing conditions on structure and created defects in Zn0.90Co0.10O thin films deposited on Si(100) substrate

Can, Musa Mutlu
Firat, Tezer
Shah, S. Ismat
Bakan, Feray
Oral, Ahmet
We analyze the effect of postdeposition annealing conditions on both the structure and the created defects in Zn0.90Co0.10O thin films, which deposited on the Si(100) substrates by the radio frequency magnetron sputtering technique using a homemade target. The dependence of the number and distribution of defects in homogeneously substituted Co+2 for Zn+2 ions in ZnO lattice on the annealing conditions is investigated. Orientations of thin films are in the [0002] direction with a surface roughness changing from 67 +/- 2 nm to 25.8 +/- 0.6 nm by annealing. The Co+2 ion substitution, changing from 7.5% +/- 0.3% to 8.8 +/- 0.3%, leads to the formation of Zn-O-Co bonds instead of Zn-O-Zn bonds and splitting of the Co 2p energy level to Co 2p(1/2) and Co 2p(3/2) with an energy difference of 15.67 +/- 0.06 eV. The defects in the lattice are revealed from the correlations between Zn-O-Co bonds and intensity of the Raman peak at around 691 cm(-1). In addition, the asymmetry changes of O 1s peak positions in the x-ray photoelectron spectra are in agreement with the Raman results.


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In this study, the influence of defects that are occurred in manufacturing operations of filament wound composite overwrapped pressure vessels on burst pressure is investigated experimentally. Firstly, material characterization methods such as tensile testing and fiber volume fraction testing of carbon/epoxy composite specimens are completed. Following determining of different layer configurations for small scale composite pressure vessels, manufacturing and burst testing of vessels are accomplished. Ef...
Effects of Sorption Enhancement and Isobutene Formation on Etherification of Glycerol with tert-Butyl Alcohol in a Flow Reactor
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In the presented work, liquid phase etherification reaction of glycerol (G) with tert-butyl alcohol (TBA) was investigated in a continuous flow reactor using Amberlyst-15 (A-15) as the catalyst. Some experiments were also repeated in a batch reactor at autogenous pressure. Effects of feed composition, reaction temperature (70-110 degrees C), and reaction pressure (1-5 bar) on the product distribution were investigated. When flow reactor pressure was reduced from S to 1 bar, enhanced glycerol conversion and ...
Citation Formats
M. M. Can, T. Firat, S. I. Shah, F. Bakan, and A. Oral, “The effects of postdeposition annealing conditions on structure and created defects in Zn0.90Co0.10O thin films deposited on Si(100) substrate,” JOURNAL OF MATERIALS RESEARCH, pp. 708–715, 2013, Accessed: 00, 2020. [Online]. Available: