Microstructural and optical properties of ZnO/(Ni) thin films prepared by DC magnetron sputtering

Gao, Fei; Tan, Li Xin; Wu, Zai Hua; Liu, Xiao Yan

doi:10.1016/j.jallcom.2009.04.133

Cited by 23 publications

(16 citation statements)

References 14 publications

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“…7). This result is in contrast with the reported data [14,23], where only red shift of the absorption edge was observed. Such a kind of E g (x) dependence might be due to the formation of defect energy level of Ni.…”

Section: Transmittancecontrasting

confidence: 99%

“…The average roughness R ms of these films was 65.7 nm, and the average grain size was 62. Structural and optical properties of Co and Ni doped ZnO thin films... magnetron sputtering [14] and sol-gel spin coating method [15]. It should be noted that the difference between AFM images for Co-doped and Ni-doped ZnO films is that nanorods in the first case are closed packed and tilted whereas for the second case columns are oriented perpendicularly to film substrate plane.…”

Section: Resultsmentioning

confidence: 99%

“…The intensity of this band increases with increase of Ni -content. Gao et al [14] discussed possible influence of six intrinsic defects such as antisite oxygen, antisite zinc, oxygen vacancy, zinc vacancy, interstitial oxygen and interstitial zinc.…”

Section: Transmittancementioning

confidence: 99%

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Structural and optical properties of Co and Ni doped ZnO thin films prepared by RF magnetron sputtering

Stolyarchuk

Kleto

Dziedzic

2017

PCSS

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We have reported the effect of Co and Ni doping on structural and optical properties of ZnO thin films prepared by RF reactive sputtering technique. The composite targets were formed by mixing and pressing of ZnO, Mn 3 O 4 , CoO and NiO powders. The thin films were deposited on sapphire, quartz and glass substrates. The structure study confirms the formation of the hexagonal wurtzite ZnO without any secondary phase in transition metal (Co, Ni) -doped samples. Cross-sectional TEM images of all studied samples show a denseand uniformly textured structure composed of column-like structure along the growth direction. The surface morphology of the thin films was studied using atomic force microscopy (AFM). Different surface morphology (AFM) images were obtained depending on the film composition and growth conditions. Optical absorption spectra suggest of substitution Zn 2+ ions in ZnO lattice by transition metal atoms. The shift of the absorption edge due to decrease the energy band gap with increasing cobalt content and complex dependence of the energy band gap on content of nickel was observed in optical absorption spectra of the studied films. The room temperature photoluminescence peaks are attributed to near band gap emission and vacancy or defect states.

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Section: Transmittancecontrasting

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Structural and optical properties of Co and Ni doped ZnO thin films prepared by RF magnetron sputtering

Stolyarchuk

Kleto

Dziedzic

2017

PCSS

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“…Further, the decrease in the band edge clearly indicates the incorporation of Ni inside the ZnO crystal structure [20,21]. Gao et al [22] also reported the similar red shift in Ni doped ZnO. When doped with Ni, the absorption edge red shifts, which might be due to the formation of a defect energy level of Ni.…”

Section: Resultsmentioning

confidence: 80%

“…Several models have been proposed to explain the ferromagnetism in ZnO include direct exchange interactions, super exchange interaction mediated by intermediates, carrier mediated exchange of localized magnetic moments, and strong interaction of bound magnetic polarons [9,33]. The observed antiferromagnetic behavior for Zn 1−x Ni x O (x = 3 mole %) was due to the interaction of neighboring Ni ions in a higher dopant concentration [22]. The origin of ferromagnetism may be due to the presence of the secondary phase, but this evidence is still controversial [34].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of ZnO and Ni Doped ZnO

Vijayaparkavi

Senthilkumaar

2011

J Supercond Nov Magn

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ZnO and Zn 1−x Ni x O (x = 1, 2 and 3 mol %) were prepared by the sol gel via ultrasonication method with the Ni concentrations of 1, 2, and 3 mol %. The samples were characterized by high resolution scanning electron microscopy, X-ray diffraction, TEM, and UV-DRS spectroscopy. The XRD spectrum reveals that all the samples are of hexagonal wurtzite structures. The crystallite size decreases with increasing Ni concentration. The Ni concentration is determined by the energy dispersive X-ray technique. From the UV spectra, upon Ni doping the characteristic peak is red shifted which is the indication of decrease in the band gap. Magnetization measurements reveal that Ni doped ZnO shows paramagnetism with enhanced Ni concentration.

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Nickel-induced microwheel-like surface morphological evolution of ZnO thin films by spray pyrolysis

Tarwal

Shinde

et al. 2012

Appl. Phys. A

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Microstructural and optical properties of ZnO/(Ni) thin films prepared by DC magnetron sputtering

Cited by 23 publications

References 14 publications

Structural and optical properties of Co and Ni doped ZnO thin films prepared by RF magnetron sputtering

Structural and optical properties of Co and Ni doped ZnO thin films prepared by RF magnetron sputtering

Synthesis and Characterization of ZnO and Ni Doped ZnO

Nickel-induced microwheel-like surface morphological evolution of ZnO thin films by spray pyrolysis

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