Temperature dependent photoluminescence characteristics of nanocrystalline ZnO films grown by sol–gel technique

Mandal, Saptarshi; Goswami, Monalisha; Das, Kaustuv; Dhar, A.; Ray, S. K.

doi:10.1016/j.tsf.2008.05.016

Cited by 47 publications

(20 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The intensity of all diffraction peaks increases with increasing annealing temperature. This increment is ascribed to the impacts of disorders or defects removed by the annealing process; removal of these defects decreases the strain and improves add atom mobility, thereby enhancing the crystallization quality of ZnO by providing an abundant supply of thermal energy (Mandal et al, 2008).…”

Section: 2experimental Detailsmentioning

confidence: 99%

ZnO QDs Deposited on Si by Sol-Gel Method: Role of Annealing Temperature on Structural and Optical Properties

Al-Azawi

Al-Asedy²,

Bidin³

et al. 2016

MAS

View full text Add to dashboard Cite

Zinc acetate, propanol, and ethanolamine are used to synthesize ZnO quantum dots (QDs) via the sol-gel method. Spin coating at 220°C is then employed to prepare ZnO thin films consist of QDs. The effects of thermal annealing temperature on the structural and optical properties of the samples are investigated. The prepared QDs are characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and photoluminescence spectroscopy (PL). XRD patterns reveal the crystalline nature of samples existing in the hexagonal wurtzite phase. Increasing annealing temperatures bring about changes to the crystal orientation through the c-axis and increase the size of the QDs from ~10 nm to ~22 nm; this increment can be explained by a coarsening mechanism and the Ostwald ripening process. The observed broadening of X-ray peaks confirms the evolution of crystalline phases in the ZnO QDs. Quantitative analysis of size-dependent strain effects is performed through the Williamson-Hall model. The QD mean size estimated from FESEM and XRD displays high consistency. Room-temperature PL peaks of 3.37ev are attributed to the radiative recombination of electrons and holes from the ZnO QDs/Si interface.

show abstract

Section: 2experimental Detailsmentioning

confidence: 99%

ZnO QDs Deposited on Si by Sol-Gel Method: Role of Annealing Temperature on Structural and Optical Properties

Al-Azawi

Al-Asedy²,

Bidin³

et al. 2016

MAS

View full text Add to dashboard Cite

show abstract

“…[57][58] The facile one-step route to the fabrication of ZnO toroidal nanostructures based on complementary BCP self-assembly and sol-gel process can be extended further to generate hybrid ZnO nanoring arrays. One example is the decoration of the ZnO nanorings with Au nanoparticles (NPs), in which the Au NPs are incorporated by immersing the hybrid ZnO/BCP film in an aqueous solution of HAuCl 4 and subsequent reduction.…”

Section: Full Papermentioning

confidence: 99%

Ultrahigh Density Arrays of Toroidal ZnO Nanostructures by One‐Step Cooperative Self‐Assembly Processes: Mechanism of Structural Evolution and Hybridization with Au Nanoparticles

Jang¹,

Yang

Jang³

et al. 2011

Chemistry A European J

View full text Add to dashboard Cite

A quick protocol for the fabrication of ultrahigh density arrays of toroidal ZnO nanostructures with tailored structures on a substrate surface is presented based on the one-step spin coating of a common solution composed of inverse micelles of polystyrene-block-poly(4-vinyl pyridine) copolymers (PS-b-P4VP) and sol-gel precursors without the need of conventional complex lithographic techniques. ZnO toroids decorated with gold nanoparticles are also obtained by subsequent loading and reduction of metallic precursors. It was elucidated that the diethanolamine moiety in the sol-gel precursors, which induces selective swelling and structural reorganization of the P4VP core blocks, plays a key role in the generation of toroidal nanostructures. Toroidal ZnO nanostructures embedded in a PS-b-P4VP matrix films or arrays of pure wurtzite ZnO nanorings are obtained by calcination under inert atmosphere. The structural parameters of the toroidal nanostructures such as the width, height, diameter of the rims as well as the spacing of their 2D arrays are controlled by employing PS-b-P4VP with different molecular weight and varying the mixing protocols.

show abstract

“…Many researchers have prepared zinc oxide thin films using the sol-gel process [9][10][11]. Most authors have focussed their attention on the effect of annealing temperature on the crystallization and their optical properties, and have considered high temperatures for the drying cycle [12][13][14]. In our knowledge, there has not been any investigation on the effects of drying condition on the physical behaviour of ZnO films.…”

Section: Introductionmentioning

confidence: 99%

Influence of drying conditions on the optical and structural properties of sol–gel-derived ZnO nanocrystalline films

Pakdel

Ghodsi

2011

Pramana - J Phys

View full text Add to dashboard Cite

Zinc oxide nanothin films were prepared on glass substrate by sol-gel dip-coating method using zinc acetate dihydrate, methanol, and monoethanolamine as precursor, solvent, and stabilizer, respectively. The relationship between drying conditions and the characteristics of ZnO nanocrystalline films (c-axis orientation, grain size, roughness and optical properties) was studied. The films were dried in an oven at different temperatures and by IR radiation. Then, the films were annealed at 500 • C in a furnace. The chemical composition, transmission spectra, structure, and morphology of the samples were studied using infrared (IR) and UV-visible spectroscopy, X-ray diffraction (XRD), and atomic force microscopy (AFM), respectively. The XRD results show that the drying conditions affect the orientation of crystallization along the (0 0 2) plane. AFM images show that the thicknesses of the films decrease from 128 to 93 nm by changing the drying conditions. The photoluminescence (PL) of ZnO nanothin films shows the UV emission at near band edge and broad green radiation at about 465 nm wavelength.

show abstract

Temperature dependent photoluminescence characteristics of nanocrystalline ZnO films grown by sol–gel technique

Cited by 47 publications

References 35 publications

ZnO QDs Deposited on Si by Sol-Gel Method: Role of Annealing Temperature on Structural and Optical Properties

ZnO QDs Deposited on Si by Sol-Gel Method: Role of Annealing Temperature on Structural and Optical Properties

Ultrahigh Density Arrays of Toroidal ZnO Nanostructures by One‐Step Cooperative Self‐Assembly Processes: Mechanism of Structural Evolution and Hybridization with Au Nanoparticles

Influence of drying conditions on the optical and structural properties of sol–gel-derived ZnO nanocrystalline films

Contact Info

Product

Resources

About