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
Fabrication and Characterization of Thin Film Transistors based on Sol-Gel Derived Zinc Oxide Channel Layers
TL;DR: In this article, the authors discuss the growth and characterisation of ZnO Channel Layers and the formation of depletion layers at ZnNO-ZnO Interlayer-Interfaces.
Book ChapterDOI
Tools and Techniques
TL;DR: This chapter will delve into the methods used in this dissertation, provide the fundamental basics, and go into more detail about the important aspects of both the theoretical and experimental tools for nanoscale analysis and beyond.
Journal ArticleDOI
Highly efficient cathodoluminescence from undoped ZnO nanophosphor
TL;DR: In this article, a comparison of the cathodoluminescence (CL) of synthesized ZnO to that of commercial ZnOs is made, and the reasons for the enhancement in CL intensity are investigated in detail.
Book ChapterDOI
Non-Calcium Inorganic Materials Fabrication by Surface-Immobilized Organic Molecular Template
TL;DR: Zhang et al. as mentioned in this paper investigated the mediation ability of surface-immobilized organic molecular template for the fabrication of non-calcium materials, such as silicate, barite, copper, iron and gold.
Journal ArticleDOI
Influence of Mn impurity on formation of secondary phases and optical properties of ZnO NPs
R. Lotfi Orimi,K. Khosravi +1 more
TL;DR: ZnO:Mn nanoparticles with various Mn concentrations (1-7%) were synthesized by a simple chemical method at low temperature as discussed by the authors, and structural and optical properties of as synthesized samples were investigated by X-ray diffraction (XRD), UV-vis absorbance, and photoluminescence (PL) spectrophotometers, respectively.
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