Journal ArticleDOI
Spin-coated ZnO thin films using ZnO nano-colloid
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In this paper, thin films of ZnO nano-colloids have been synthesized using a top-down wet chemistry method starting from submicron ZnOs, and a stable suspension is achieved, exhibiting strong optical absorbance and a band edge at 376 nm.Abstract:
Using ZnO nano-colloids, thin films of ZnO have been deposited and characterized. The nano-colloid has been synthesized using a top-down wet chemistry method starting from submicron ZnO particles. The steric stabilization technique is implemented using stearic acid as a capping agent to prevent agglomeration of the ZnO nanoparticles. A stable suspension is achieved, exhibiting strong optical absorbance and a band edge at 376 nm. The simple chemistry enables a uniform film on a variety of substrates using spin coating. Current-voltage (I–V) measurements of ZnO films deposited on quartz after annealing treatment show a resistivity of 1.89×105 Ω · cm.read more
Citations
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Journal ArticleDOI
A theoritical study on spin coating technique
TL;DR: A comprehensive theory of spin coating technique has been reviewed and the basic principles and parameters controlling the process are clearly highlighted, which include spin speed, spin time, acceleration and fume exhaust.
Journal ArticleDOI
Enhanced ultraviolet sensitivity of zinc oxide nanoparticle photoconductors by surface passivation
TL;DR: The PVA layer provided surface passivation of zinc oxide nanoparticles as discussed by the authors, and as a result of PVA coating, enhancement in ultraviolet emission and suppression of parasitic green emission was observed.
Journal ArticleDOI
ZnO nanoparticle surface acoustic wave UV sensor
TL;DR: In this paper, the response to ultraviolet illumination of ZnO nanoparticles deposited on LiNbO3 substrate was investigated using surface acoustic waves (SAWs) in the wide range of UV wavelengths from 280 to 375 nm.
Journal ArticleDOI
Preparation of poly(N-vinylpyrrolidone)-stabilized ZnO colloid nanoparticles
TL;DR: The colloidal ZnO/PVP/methanol solution, apart from the most intense PL band at 356 nm coming from the PVP, exhibits a strong PL band which corresponds to the emission of the free exciton recombination in Zn O nanoparticles.
Journal ArticleDOI
Structural and Optical Properties of Zinc Oxide (ZnO) based Thin Films Deposited by Sol-Gel Spin Coating Method
TL;DR: In this article, the structural and optical properties of ZnO thin films deposited by sol-gel spin coating method have been investigated, and the results showed that the characteristics of the thin films were strongly depend on annealing temperature.
References
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Electron–electron and electron‐hole interactions in small semiconductor crystallites: The size dependence of the lowest excited electronic state
TL;DR: In this paper, the excited electronic states of semiconductor crystallites sufficiently small (∼50 A diam) that the electronic properties differ from those of bulk materials were modeled, and an approximate formula was given for the lowest excited electronic state energy.
Journal ArticleDOI
Electronic wave functions in semiconductor clusters: experiment and theory
Journal ArticleDOI
Low-temperature wafer-scale production of ZnO nanowire arrays.
Lori E. Greene,Matt Law,Joshua E. Goldberger,Franklin Kim,Justin C. Johnson,Yanfeng Zhang,Richard J. Saykally,Peidong Yang +7 more
TL;DR: A low-temperature, large-scale, and versatile synthetic process is needed before ZnO nanowire arrays find realistic applications in solar energy conversion, light emission, and other promising areas, and the ease of commercial scale-up is presented.
Book
Thin Film Solar Cells
K. L. Chopra,S. R. Das +1 more
TL;DR: In this paper, the basic physical processes in solar cell materials are discussed, and the properties of thin films for solar cells are discussed. And the authors propose a novel concept in the design of high efficiency solar cells.
Journal ArticleDOI
Synthesis of zinc oxide nanoparticles with controlled morphology
Lingna Wang,Mamoun Muhammed +1 more
TL;DR: A chemical precipitation method has been used for the synthesis of ZnO nanoparticles with controlled morphology as mentioned in this paper, where the precursor powders were prepared using several precipitation reagents and using ammonium carbamate as a precipitating reagent led to unusual rod shape morphology.
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