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Photoluminescence and cathodoluminescence studies of stoichiometric and oxygen-deficient ZnO films
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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
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High-Voltage, High-Current Electrical Switching Discharge Synthesis of ZnO Nanorods: A New Method toward Rapid and Highly Tunable Synthesis of Oxide Semiconductors in Open Air and Water for Optoelectronic Applications.
Shahab Sharifi Malvajerdi,Masoud Abrari,Vahid Karimi,Mojtaba Shafiee,Saeb Ghollamhosseini,Reza Taheri Ghahrizjani,Morteza Ahmadi,Danhao Wang,Haiding Sun,Mina Soltanmohammadi,Aref Imani,Majid Ghanaatshoar,Seyed Majid Mohseni,Nima Taghavinia +13 more
TL;DR: In this paper, a novel method of oxide semiconductor nanoparticle synthesis is proposed based on highvoltage, high-current electrical switching discharge (HVHC-ESD), which enables the synthesis of ZnO nanorods with ultraviolet (UV) and visible emissions.
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Synthesized zinc oxide nano rods and flowers studies for optical, di-electrical and photocatalytic applications
Hemant K. Verma,Hemant K. Verma,Divya Rehani,Shailesh Narain Sharma,Shailesh Narain Sharma,K.K. Maurya,K.K. Maurya +6 more
TL;DR: In this article, X Ray Diffractometer (XRD) and XRD images showed high crystalline morphology and the formation of nano rods and flowers for photocatalysis and photovoltaics.
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Morphological, structural and optical analysis of green, red and yellow emission bands in new chiral imines with a benzothiophene moiety
O. Portillo-Moreno,R. Palomino-Merino,G. Hernández-Téllez,G.E. Moreno-Morales,M.A. Mora-Ramírez,Efraín Rubio-Rosas,Angel Mendoza,René Gutiérrez-Pérez +7 more
TL;DR: In this article, four enantiopure imines in solid state with different functional groups added in the para-position of the aromatic ring in the chiral moiety were analyzed with the aim of correlating this fact with surface morphology, structural and optical changes of these imines.
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Gallium contents-dependent improved behavior of sol–gel-grown Al: Ga co-doped ZnO nanostructures
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Structural and optical properties of periodically ordered ZnO nanowires
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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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