Journal ArticleDOI
Photoluminescence and cathodoluminescence studies of stoichiometric and oxygen-deficient ZnO films
Reads0
Chats0
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
More filters
Journal ArticleDOI
Hydrothermal epitaxy of ZnO:Co diluted magnetic semiconducting single crystalline films
TL;DR: ZnO:Co films with room-temperature ferromagnetism have been hydrothermally grown in water at 90°C using a ZnO seed layer on MgAl2O4 (111) substrates.
Journal ArticleDOI
Exciton luminescence of ZnO fine particles
TL;DR: In this paper, annealed ZnO fine particles with ∼20 nm size were investigated at 12 K and the time-resolved photoluminescence spectra were analyzed.
Journal ArticleDOI
ZnO nanorod arrays assembled on activated carbon fibers for photocatalytic degradation: Characteristics and synergistic effects.
Sha Luo,Chunwei Liu,Sui Zhou,Wei Li,Chunhui Ma,Shouxin Liu,Wang Yin,Hero J. Heeres,Weiqing Zheng,Kulathuiyer Seshan,Songbo He +10 more
TL;DR: Outstanding features indicate that activated carbon fibers supported ZnO nanorod arrays have significant potential to be used as catalysts for photodegradation.
Journal ArticleDOI
Concentration Dependence of Optical Properties in Arsenic-Doped ZnO Nanocrystalline Films Grown on Silicon (100) Substrates by Pulsed Laser Deposition
TL;DR: In this article, the As dopant effects on lattice vibrations and electronic transitions of the ZnO nanocrystalline films have been investigated by Raman scattering and photoluminescence spectra at room temperature.
Journal ArticleDOI
Dry etching of bulk single-crystal ZnO in CH 4 /H 2 -based plasma chemistries
Wantae Lim,Lars F. Voss,Rohit Khanna,Brent P. Gila,David P. Norton,Stephen J. Pearton,Fan Ren +6 more
TL;DR: In this article, the effect of inert gas additive (He, Ar, Xe) to CH4/H2 discharges for dry etching of single crystal ZnO was examined.
References
More filters
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.
Related Papers (5)
Green luminescent center in undoped zinc oxide films deposited on silicon substrates
Bixia Lin,Zhuxi Fu,Yunbo Jia +2 more