کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1657712 | 1517647 | 2013 | 4 صفحه PDF | دانلود رایگان |
Thin films of Zn1 − xCoxO have shown potential application in the field of dilute magnetic semiconductors. Zn1 − xCoxO films were prepared on glass substrates at a temperature of 350 °C over the composition range, 0–12%. The structure, composition, optical and magnetic properties of as-grown Zn1 − xCoxO films were studied using appropriate techniques. The X-ray diffraction spectra showed a predominant (002) reflection corresponding to the hexagonal wurtzite structure. No changes in the preferred orientation with composition were observed. The films showed hexagonal shaped grains that were uniformly distributed and the evaluated grain size varied in the range, 20–40 nm. The films prepared at x = 10% showed good crystallinity and surface morphology. The X-ray photoelectron spectroscopy studies indicated uniform composition across the thickness of the layers, and a shift in the peak positions of Zn2p3/2, Zn2p1/2 and O1s was observed with the increase of Co-doping content. The films exhibited an optical transmittance > 75%, and the energy band gap varied in the range 3.37–3.18 eV with the change of Co-doping. The films also exhibited magnetic behavior at low temperatures. The results were reported and discussed.
► Deposition of Co-doped ZnO films by a simple and economic process, spray pyrolysis.
► XRD spectra indicated a continuous shift in the position of preferred orientation with the increase of Co-doping in ZnO films.
► XPS spectra indicated the presence of Co ion in the 2+ state in ZnO matrix.
► Co-doped ZnO films exhibited the ferromagnetic behavior at low temperatures (10 K).
Journal: Surface and Coatings Technology - Volume 231, 25 September 2013, Pages 149–152