The structure and optical properties of ZnO nanocrystals dependence on Co-doping levels

Wang, Sha; Li, Ping; Liu, Hui; Li, Jibiao; Wei, Yu

doi:10.1016/j.jallcom.2010.05.183

Cited by 62 publications

(28 citation statements)

References 30 publications

(29 reference statements)

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“…Taken [25], it is also noted that there is some small variation of the spectral line shapes and peak BE indicating that the local electronic structure of the Co impurities in ZnO depends (weakly) on doping concentration. The spin orbit splitting of Co2p is close to literature values [14,26], confirming the absence of metallic phase Co, but decreases slightly with doping ( Table 1). The intensity of the Co2p 3/2 peak for ZC1 with respect to the satellite peak is low due to the small amount of Co embedded into ZnO lattice [23].…”

Section: Xpssupporting

confidence: 87%

“…4c) shows that there is a good fit between the ZC1-4 films and the Co 2+ standard [3,5]. The spectra depict the characteristic peaks for Co2p 3/2 and Co2p 1/2 (Table 1), along with satellite peaks (~795 and ~812 eV) which are specifically connected with the +2 ionic state of Co [14,24]. Taken [25], it is also noted that there is some small variation of the spectral line shapes and peak BE indicating that the local electronic structure of the Co impurities in ZnO depends (weakly) on doping concentration.…”

Section: Xpsmentioning

confidence: 79%

“…Considering next the visible spectral range, we note that while it has been reported that PL decreases with increasing Co doping [37] significant PL persists in Co-doped ZnO samples of various types [14,23,29,38]. Starting at the short-wavelength end of the visible, a violet band, centered at 2.96 eV, due to zinc interstitials (Zn i ) appears in the case of the ZnO film.…”

Section: Photoluminescencementioning

confidence: 80%

“…ZnO has been synthesized in a variety of ways, including pulsed laser deposition [11], chemical vapor transport [12], electrodeposition [13], co-precipitation [14] and solid state reaction [15]. While simpler synthesis techniques that can be performed in ambient environment have the attraction of wider accessibility and low-cost it is, of course, very important that the (doped) ZnO thus produced is of high integrity, displaying comparable properties and competitive functionality with that produced by other means.…”

Section: Introductionmentioning

confidence: 99%

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Solution-based synthesis of cobalt-doped ZnO thin films

et al. 2012

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Publisher rights This is the author's version of a work that was accepted for publication in Thin Solid Films. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Thin Solid Films, Vol. 524, 01/12/2012 General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights.Take down policy The Research Portal is Queen's institutional repository that provides access to Queen's research output. Every effort has been made to ensure that content in the Research Portal does not infringe any person's rights, or applicable UK laws. If you discover content in the Research Portal that you believe breaches copyright or violates any law, please contact openaccess@qub.ac.uk. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT1 Solution-based synthesis of cobalt-doped ZnO thin films Sesha VempatiSchool of Mathematics and Physics, Queen's University Belfast, BT7 1NN, UK, Amitha ShettyMaterials Research Center, Indian Institute of Science, Bangalore -560012, India. P. Dawson*School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, UK, K. K. Nanda and S.B. KrupanidhiMaterials Research Center, Indian Institute of Science, Bangalore -560012, India.Corresponding author: p.dawson@qub.ac.uk AbstractUndoped and cobalt-doped (1-4 wt%) ZnO polycrystalline, thin films have been fabricated on quartz substrates using sequential spin-casting and annealing of simple salt solutions. X-ray diffraction (XRD) reveals a wurzite ZnO crystalline structure with high-resolution transmission electron microscopy showing lattice planes of separation 0.26 nm, characteristic of (002) planes.The Co appears to be tetrahedrally co-ordinated in the lattice on the Zn sites (XRD) and has a charge of +2 in a high-spin electronic state (X-ray photoelectron spectroscopy). Co-doping does not alter the wurzite structure and there is no evidence of the precipitation of cobalt oxide phases within the limits of detection of Raman and XRD analysis. Lattice defects and chemisorbed oxygen are probed using photoluminescence and Raman spectroscopy -crucially, however, this transparent semiconduc...

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Section: Xpssupporting

confidence: 87%

Section: Xpsmentioning

confidence: 79%

Section: Photoluminescencementioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

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Solution-based synthesis of cobalt-doped ZnO thin films

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“…Among these methods, RF magnetron sputtering method has advantages of relatively simplicity and large area deposition and uniformity of the films. Since that the structure and properties of sputtered films are strongly influenced by the gas composition [27,28]. In this paper,.We report our investigation on the structural and magnetic properties of Cu, Co codoped ZnO films, which synthesized by the RF magnetron sputtering using the high purity argon as the sputtering gas.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of room temperature ferromagnetism in Cu, Co codoped ZnO film enhanced by hybridization

Liu

Zhang

et al. 2015

Ceramics International

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Growth and Optical Properties of Nonpolar ($10{\bar {1}}0$) Zn_1‐xCo_xO Epitaxial Film on a γ‐LiAlO₂ Substrate

Lin

et al. 2011

Chemical Vapor Deposition

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The structure and optical properties of ZnO nanocrystals dependence on Co-doping levels

Cited by 62 publications

References 30 publications

Solution-based synthesis of cobalt-doped ZnO thin films

Solution-based synthesis of cobalt-doped ZnO thin films

Comparative study of room temperature ferromagnetism in Cu, Co codoped ZnO film enhanced by hybridization

Growth and Optical Properties of Nonpolar ($10{\bar {1}}0$) Zn_1‐xCo_xO Epitaxial Film on a γ‐LiAlO₂ Substrate

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The structure and optical properties of ZnO nanocrystals dependence on Co-doping levels

Cited by 62 publications

References 30 publications

Solution-based synthesis of cobalt-doped ZnO thin films

Solution-based synthesis of cobalt-doped ZnO thin films

Comparative study of room temperature ferromagnetism in Cu, Co codoped ZnO film enhanced by hybridization

Growth and Optical Properties of Nonpolar ($10{\bar {1}}0$) Zn1‐xCoxO Epitaxial Film on a γ‐LiAlO2 Substrate

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Growth and Optical Properties of Nonpolar ($10{\bar {1}}0$) Zn_1‐xCo_xO Epitaxial Film on a γ‐LiAlO₂ Substrate