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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Cathodoluminescence from a device of carbon nanotube-field emission display with ZnO nanocluster phosphor
Jiji Antony,You Qiang +1 more
TL;DR: In this article, the first time with ZnO nanoclusters as a phosphor for a CNT-FED (carbon nanotube-field emission display) device has been demonstrated, where the CNT cathode is operated in diode mode with beam currents of 10 and 20 mA and low accelerating voltages of 1.7 and 1.8 kV.
Journal ArticleDOI
Photoluminescence and structural properties of Si/SiC core–shell nanowires growth by HWCVD
Nur Fatin Farhanah Binti Nazarudin,Nurul Jannah Binti Mohd Noor,Saadah Abdul Rahman,Boon Tong Goh +3 more
TL;DR: In this article, the effects of the deposition pressure on the optical and structural properties of the nanowires are also discussed, and the results show that the formation of the agglomerated grains attributed to an increasing of the SiC phase at higher deposition pressure.
Journal ArticleDOI
Fabrication of ZnO Thin Films by Sol–Gel Spin Coating and Their UV and White-Light Emission Properties
TL;DR: ZnO thin films have been fabricated by the sol-gel spin-coating technique and annealed under different conditions, and their ultraviolet (UV) and white-light emission properties investigated as discussed by the authors.
Journal ArticleDOI
Hydrogen peroxide treatment on ZnO substrates to investigate the characteristics of Pt and Pt oxide Schottky contacts
TL;DR: In this article, the authors utilized hydrogen peroxide (H2O2) treatment on (0, 0,0, 1) ZnO substrates to investigate the characteristics of Pt and Pt oxide Schottky contacts (SCs).
Journal ArticleDOI
Mesoporous SiO2 thin films containing photoluminescent ZnO nanoparticles and simultaneous SAXS/WAXS/ellipsometry experiments
Natacha Krins,John D. Bass,Béatrice Julián-López,Patrick Evrar,Cédric Boissière,Lionel Nicole,Clément Sanchez,Heinz Amenitsch,David Grosso +8 more
TL;DR: In this article, the formation of ZnO/SiO2 nanocomposite thin films was reported, which are composed of 5 nm sized-wurtzite znO nanoparticles nucleated within vitreous SiO2 which was in the form of either an ordered mesoporous or dense matrix.
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.
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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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