Journal ArticleDOI
Photoluminescence and cathodoluminescence studies of stoichiometric and oxygen-deficient ZnO films
TLDR
In this article, the authors examined the spectra of stoichiometric and oxygen-deficient ZnO films grown on sapphire and found that the green and yellow emissions depend on the width of the free-carrier depletion region at the particle surface; the thinner the width, the larger the intensity.Abstract:
Photoluminescence and cathodoluminescence (CL) spectra of stoichiometric and oxygen-deficient ZnO films grown on sapphire were examined. It was found that the intensities of the green and yellow emissions depend on the width of the free-carrier depletion region at the particle surface; the thinner the width, the larger the intensity. Experimental results and spectral analyses suggest that the mechanism responsible for the green (yellow) emission is the recombination of a delocalized electron close to the conduction band with a deeply trapped hole in the single ionized oxygen vacancy Vo+ (the single negatively charged interstitial oxygen ion Oi−) center in the particle.read more
Citations
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Ionoluminescence study of Zn− and O− implanted ZnO crystals: An additional perspective
E.N. Epie,Wei-Kan Chu +1 more
TL;DR: In this article, the role of native point defects on the optical properties of ZnO using ion implantation, rapid thermal annealing (RTA) and ionoluminescence (IL) is presented.
Journal ArticleDOI
Tailorable Au Nanoparticles Embedded in Epitaxial TiO2 Thin Films for Tunable Optical Properties.
Shikhar Misra,Leigang Li,Jie Jian,Jijie Huang,Xuejing Wang,Dmitry Zemlyanov,Ji-Wook Jang,Fabio H. Ribeiro,Haiyan Wang +8 more
TL;DR: The tailorable shape and size of Au NPs embedded in TiO2 matrix present a novel oxide-metal hybrid material platform for optical property tuning and highly efficient plasmonic properties for future oxide-based photocatalytic sensors and devices.
Journal ArticleDOI
Influence of Fe doping on the structural, optical and acetone sensing properties of sprayed ZnO thin films
TL;DR: In this paper, X-ray powder diffraction (XRD), atomic force microscopy (AFM), and scanning electron microscopy were used to analyze ZnO thin films (undoped and Fe-doped) deposited by chemical spray pyrolysis technique.
Journal ArticleDOI
Cost-effective large-scale synthesis of oxygen-defective ZnO photocatalyst with superior activities under UV and visible light
Jing Wang,Jing Wang,Ruosong Chen,Yi Xia,Yi Xia,Guifang Wang,Hongyuan Zhao,Lan Xiang,Sridhar Komarneni +8 more
TL;DR: In this paper, a cost-effective solution method was developed to produce ZnO photocatalyst in large quantity, through the conversion of e-Zn(OH) 2 to znO in NaOH solutions.
Journal ArticleDOI
Effect of annealing on the sub-bandgap, defects and trapping states of ZnO nanostructures
Ruri Agung Wahyuono,Ruri Agung Wahyuono,Ruri Agung Wahyuono,Felix Hermann-Westendorf,Andrea Dellith,Christa Schmidt,Jan Dellith,Jonathan Plentz,Martin Schulz,Martin Schulz,Martin Presselt,Martin Seyring,Markus Rettenmeyer,Benjamin Dietzek,Benjamin Dietzek +14 more
TL;DR: In this article, annealing treatment was applied to different mesoporous ZnO nanostructures prepared by wet chemical synthesis, i.e., nanoflowers (NFs), spherical aggregates (SPs), and nanorods (NRs).
References
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Journal ArticleDOI
Electronic wave functions in semiconductor clusters: experiment and theory
Journal ArticleDOI
Correlation between photoluminescence and oxygen vacancies in ZnO phosphors
TL;DR: By combining electron paramagnetic resonance (EPR), optical absorption, and photoluminescence (PL) spectroscopy, a strong correlation is observed between the green 510 nm emission, the free-carrier concentration, and the density of singly ionized oxygen vacancies in commercial ZnO phosphor powders as mentioned in this paper.
Journal ArticleDOI
Point defects and luminescence centres in zinc oxide and zinc oxide doped with manganese
TL;DR: The green and yellow luminescence centres in ZnO and Mn-doped ZnOs are investigated in this article, and it seems that a VZn · V0 divacancy exists, and that luminecence is due to interstitial zinc and oxygen.
Journal ArticleDOI
Luminescent Transitions Associated With Divalent Copper Impurities and the Green Emission from Semiconducting Zinc Oxide
TL;DR: In this paper, the role of deep acceptor states in electronic processes in covalent solids was investigated and it was found that the transition is an optical charge transfer between a highly shielded localized level of the copper impurity and a level which is strongly perturbed by the valence-band states of the crystal.
Journal ArticleDOI
Identification of the transition responsible for the visible emission in ZnO using quantum size effects
TL;DR: In this article, the emission properties of suspensions of nanocrystalline ZnO particles with different particle sizes were studied and a linear relationship between the energetic maxima of the two emission bands was found.
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