Properties of Dy-doped ZnO nanocrystalline thin films prepared by pulsed laser deposition

Huang, Huiming; Ou, Yangjun; Xu, Sheng; Fang, Guojia; Li, Meiya; Zhao, Xingzhong

doi:10.1016/j.apsusc.2007.08.041

Cited by 68 publications

(26 citation statements)

References 35 publications

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“…Recently, rare earth (RE)-doped DMS together with transition metal (TM) dopants has been actively investigated Photongkam et al evidenced that the codoped Eu plays an important role in facilitating the Co substitution of Zn, leading to intrinsic ferromagnetism [22]. Assadi et al reported that the induced ferromagnetism in the Eu and Co codoped ZnO is intrinsic at ambient temperature [23]. Huang et al reported that, among different dopants, dysprosium (Dy) rare earth element has been proposed as an efficient dopant for the ZnO nanoparticles to improve photocatalytic action [24] Though there are many reports on structural, optical and magnetic characteristics of TMdoped or codoped ZnO, the origin of RTFM in DMS materials is not understood completely.…”

Section: Introductionmentioning

confidence: 99%

Influence of Co and Dy Doping on the Optical and Magnetic Properties of ZnO Nanoparticles for DMS Application

Thangeeswari

Murugasen

Velmurugan

2015

J Supercond Nov Magn

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Dysprosium-(Dy) and cobalt (Co)-doped zinc oxide (ZnO) nanoparticles with various concentrations have been synthesized by simple chemical precipitation method. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray (EDAX) measurements were conducted respectively for the structural, morphological, and compositional investigation of the sample. XRD analysis indicated that diffraction peaks of all the samples can be indexed to the hexagonal wurtzite structure of ZnO. No secondary phases including Co and Dy ions were detected in the samples even for the highest doping concentrations of Dy. Average particle size is found to be 25-34 nm. Scanning electron microscope and transmission electron microscope analysis revealed that the dopant atoms of Co and Dy are homogeneously distributed in ZnO wurtzite structure. The samples were characterized by EDAX to confirm the expected stoichiometry. In the photoluminescence spectra, Dy co-doped samples show a violet emission along with a broad yellow emission due to the 4 F 9/2 -6 H 15/2 inner shell transitions of Dy 3+ ion. The photoluminescence (PL) enhancement process in Dy co-doped ZnO:Co is mainly due to Dy as a sensibilizer which could effectively enhance the luminescence intensity. Absorption spectra of dysprosium-(Dy) and cobalt (Co)-doped ZnO nanoparticles exhibited enhanced optical absorption in visible region. Magnetization measurements have shown that the particles have room temperature ferromagnetic behavior with relatively high coercive fields which are decreasing with the increase of doping concentration. The analysis of optical and magnetic properties shows that Co-and Dy-doped ZnO nanoparticles are a promising material for DMS application and have potential applications in optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Influence of Co and Dy Doping on the Optical and Magnetic Properties of ZnO Nanoparticles for DMS Application

Thangeeswari

Murugasen

Velmurugan

2015

J Supercond Nov Magn

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“…Huang et al reported that a tensile strain produces a decrease in band gap whereas a compressive strain can result in an increase in band gap. [70,71].Renet al, suggested that higher defect concentrations in the film contribute to higher energy absorption edges [72].Itis found that the band gap energy of the P1 and P3 films are blue shifted with Pr doping. But the band gap energy shows a reduction in heavily doped film (P5).…”

Section: Resultsmentioning

confidence: 99%

Influence of Pr Doping on the Structural, Morphological, Optical, Luminescent and Non-linear Optical Properties of RF-Sputtered ZnO Films

Sreedharan

Vinodkumar

Navas

et al. 2015

JOM

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“…The increase of band gap energy is due to the reason that, when Dy ions doped into ZnO host matrices, the Fermi level shifts closer to higher level of conduction band (Burstein-Moss effect) [30,31]. Fig.…”

Section: Uv-vis Diffuse Reflectance Spectra (Uv-vis Drs)mentioning

confidence: 97%

Influence of Dy dopant on structural and photoluminescence of Dy-doped ZnO nanoparticles

Jayachandraiah

Kumar

Krishnaiah³

et al. 2015

Journal of Alloys and Compounds

103

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Properties of Dy-doped ZnO nanocrystalline thin films prepared by pulsed laser deposition

Cited by 68 publications

References 35 publications

Influence of Co and Dy Doping on the Optical and Magnetic Properties of ZnO Nanoparticles for DMS Application

Influence of Co and Dy Doping on the Optical and Magnetic Properties of ZnO Nanoparticles for DMS Application

Influence of Pr Doping on the Structural, Morphological, Optical, Luminescent and Non-linear Optical Properties of RF-Sputtered ZnO Films

Influence of Dy dopant on structural and photoluminescence of Dy-doped ZnO nanoparticles

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