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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Hybrid inorganic-organic light-emitting heterostructure devices based on ZnO
TL;DR: In this paper, a review of hybrid I/O electroluminescent structures based on zinc oxide (ZnO) and conjugated polymers is presented, where four main categories have been investigated, and the structural, electrical and optical characteristics of each group have been carefully scrutinized and compared.
Journal ArticleDOI
Cathodoluminescence and photoluminescence of swift ion irradiation modified zinc oxide-porous silicon nanocomposite
Yogesh Kumar,Manuel Paulino Linares Herrera,Fouran Singh,S.F. Olive-Méndez,D. Kanjilal,Shiv Kumar,Vivechana Agarwal +6 more
TL;DR: In this article, the room temperature cathodoluminescence and photolumininescence of swift ion irradiated (130-MeV Nickel ion) porous silicon zinc oxide nanocomposites are reported.
Journal ArticleDOI
Room temperature ferromagnetism of (Mn,Fe) codoped ZnO nanowires synthesized by chemical vapor deposition
TL;DR: In this paper, the structure and properties of (Mn,Fe) codoped ZnO nanowires were investigated by X-ray, electron microscopy, Raman, photoluminescence, and superconducting quantum interference device magnetometer.
Journal ArticleDOI
Effect of indium incorporation, stimulated by UHV treatment, on the chemical, optical and electronic properties of ZnO thin film
Mahmoud Bedrouni,Bachir Kharroubi,A. Ouerdane,M. Bouslama,M'hamed Guezzoul,Yves Caudano,Kada Belmokhtar Bensassi,M. Bousmaha,M.A. Bezzerrouk,Azzeddine Mokadem,Mahfoud Abdelkrim +10 more
TL;DR: In this article, the authors show the importance of powerful and complementary analysis techniques XPS (X-rays Photoelectron Spectroscopy), AES (Auger Electron Spectrographs), and UPS (UV Photo Electromagnetic Spectrograms) associated with PL (Photoluminescence) to investigate the chemical composition, optical emission, and electronic structure of undoped ZnO (UZO) and in-doped ZNO (IZO) thin films at the contaminated and clean states.
Journal ArticleDOI
Hydrothermal synthesis and photoluminescent properties of ZnO sub-micrometer and micrometer rods
Libo Fan,Hongwei Song,Lixin Yu,Zhongxin Liu,Linmei Yang,Guohui Pan,Xue Bai,Yanqiang Lei,Tie Wang,Zhuhong Zheng,Xianggui Kong +10 more
TL;DR: ZnO sub-micrometer and micrometer rods with hexagonal structure were synthesized by the hydrothermal method and characterized by X-ray diffraction (XRD) patterns, scanning electron microscopy (SEM) images and Raman spectra as mentioned in this paper.
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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