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We synthesized undoped and Mn-doped ZnO films on glass substrates using the sol-gel technique. The micro-structure, morphology and optical properties of ZnO films were studied by using X-ray diffraction, Atomic Force Microscope and UV-visible transmission spectra. After annealed at a temperature lower than 550°C by Rapid Thermal Processing (RTP), all the ZnO films are polycrystalline with a hexagonal...
We have investigated the properties of Mn-doped ZnO nanocrystalline films grown on zinc foil by hydrothermal method. The microstructure, optical and magnetic properties of these films have been characterized by SEM, XRD, XPS and UV-vis spectrum. The XPS spectra show the doping manganese exists as Mn2+. From UV-vis spectra, the shift in band gap and greater reflectivity can be observed due to Mn doping...
In this paper, the microstructure, phase structure and electric properties of the ZnO varistors after annealing at different temperature were researched. The varistors were prepared by the ordinary sintering process using the raw powders crushed and mixed in a high-energy ball milling. From the results of SEM and XRD, it was found that the thickness of the grain boundary was broadened with the increase...
Multilayer oxide thin film stacks of aluminum doped zinc oxide (AZO) and tin doped indium oxide (ITO) have been sequentially deposited on soda lime glass substrates by RF sputtering of AZO and ITO ceramic targets at a substrate temperature of 150??C. The ratio of the AZO thickness to the ITO thickness is varied while keeping the total thickness of the stack constant. The electrical and optical properties...
This paper attempts to clarify the link between microstructure of hydrogenated microcrystalline silicon (/spl mu/c-Si:H) and layer transport properties as well as electrical performances of solar cells. Analysis of a series of layers shows that coplanar transport properties in /spl mu/c-Si:H (as evaluated by /spl sigma//sub dark/, /spl sigma//sub photo/ and L/sub amb/) relate to the size of nanocrystal...
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