کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1614343 1516333 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sol–gel derived nanostructure undoped and cobalt doped ZnO: Structural, optical and electrical studies
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Sol–gel derived nanostructure undoped and cobalt doped ZnO: Structural, optical and electrical studies
چکیده انگلیسی

Nanostructure ZnO and ZnO:Co films were deposited onto borofloat glass substrates by the sol–gel method using spin coating technique. X-ray diffraction (XRD) study was used to investigate the effects of cobalt dopant on the crystalline structure and orientation of the films. XRD observations showed that the crystalline quality of ZnO film decreased with increasing cobalt content. The effect of Co incorporation on the surface morphology was clearly observed from scanning electron microscopy (SEM) images. The chemical composition of the 3% Co doped nanostructure ZnO film was confirmed by X-ray photoelectron spectroscopy (XPS). The doping of ZnO with Co causes a decrease in particle size and crystallinity while it leads to an increase in the band gap, which changes in accordance with the Burstein–Moss effect. The optical constants of the films such as refractive index and extinction coefficient were determined using transmittance and reflectance spectra. The sheet resistance of the films, which was calculated using Van der Pauw method, first increased by about two orders of magnitude and then tended to decrease.


► Nanostructure ZnO and ZnO:Co films were deposited by the sol–gel method using spin coating technique.
► The effects of Co doping level on the structural, morphological and electrical properties of ZnO films were investigated.
► Co doping causes a decrease in particle size and crystallinity while it leads to increase in the band gap.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 560, 25 May 2013, Pages 181–188
نویسندگان
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