Emission of ZnO:Ag nanorods obtained by ultrasonic spray pyrolysis

Lozada, Erick Velázquez; Torchynska, T. V.; Espínola, J.L. Casas; Millan, B. Perez

doi:10.1016/j.physb.2014.04.083

Cited by 30 publications

(12 citation statements)

References 35 publications

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“…It was shown earlier [18,19] that free exciton emission or its replicas dominate in ZnO NC spectra at room temperature owing to the high free exciton binding energy (60 meV) at 300 K and the fast decay of the PL intensities of bound exciton and donor-accepter pair emissions with increasing temperature in the range of 10-300 K. Thus the high PL intensity and a small halfwidth of 3.14 eV PL band in PL spectra of ZnOþxC mixtures in an initial state at 300 K permit assigning NBE emission to the 2(3) LO phonon replicas of free excitons in ZnO NCs. The nature of IR PL band peaked at 1.57 eV (III) has to be clarified.…”

Section: Resultsmentioning

confidence: 67%

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Photoluminescence trend in mixture of zinc oxide and carbon nanoparticles after mechanical processing

Lozada

Torchynska

Espínola

et al. 2015

Materials Science in Semiconductor Processing

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Section: Resultsmentioning

confidence: 67%

“…Note that in our experiments (presented below) this PL band intensity varies by the same way as the PL intensity of 3.14 eV PL band. Thus we can attribute the IR PL band at 1.57 eV (III) to the second order diffraction peak of 3.14 eV PL band [17][18][19][20]. The comparison of Figs.…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence trend in mixture of zinc oxide and carbon nanoparticles after mechanical processing

Lozada

Torchynska

Espínola

et al. 2015

Materials Science in Semiconductor Processing

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“…PL emission from ZnO:Ag films, formed by nanorods (NRs) as a function of the measurement temperature (10–300 K), was published in 2014 [131]. These films were deposited on soda-lime glass substrates at the deposition temperature of 400 °C and different deposition times (3, 5, and 10 min).…”

Section: Luminescent Materialsmentioning

confidence: 99%

Spray Pyrolysis Technique; High-K Dielectric Films and Luminescent Materials: A Review

2018

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The spray pyrolysis technique has been extensively used to synthesize materials for a wide variety of applications such as micro and sub-micrometer dimension MOSFET´s for integrated circuits technology, light emitting devices for displays, and solid-state lighting, planar waveguides and other multilayer structure devices for photonics. This technique is an atmospheric pressure chemical synthesis of materials, in which a precursor solution of chemical compounds in the proper solvent is sprayed and converted into powders or films through a pyrolysis process. The most common ways to generate the aerosol for the spraying process are by pneumatic and ultrasonic systems. The synthesis parameters are usually optimized for the materials optical, structural, electric and mechanical characteristics required. There are several reviews of the research efforts in which spray pyrolysis and the processes involved have been described in detail. This review is intended to focus on research work developed with this technique in relation to high-K dielectric and luminescent materials in the form of coatings and powders as well as multiple layered structures.

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“…To the adjustment of ZnO NC characteristics the doping by different metals Al [55], Co [56], Ni [57], Cu [58,59], or Ag [60] can be used. Cu atoms are most impotent impurities due to the low toxicity and large source content.…”

Section: Impact Of Cu-doping On the Structure And Emission Propertiesmentioning

confidence: 99%

“…In the earlier mentioned papers [11,[58][59][60][61][62][63], the ZnO NCs were doped by Cu in low concentrations, when Cu atoms substituted Zn atoms in the ZnO crystal lattice. However, the method of Zn etching technology with thermal treatment permits to prepare ZnO:Cu NCs with metallic Cu nanoparticles located at the ZnO NC surface (Figure 19, Table 5).…”

Section: Plasmon-related Effects In Zno Cu Nc Films With Metallic Cu mentioning

confidence: 99%

Emission, Defects, and Structure of ZnO Nanocrystal Films Obtained by Electrochemical Method

Torchynska¹,

Filali²

2017

Thin Film Processes - Artifacts on Surface Phenomena and Technological Facets

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ZnO nanocrystal (NC) films, prepared by electrochemical etching with varying the technological routines, have been studied by means of photoluminescence (PL), scanning electronic microscopy (SEM), energy dispersion spectroscopy (EDS), Raman scattering, and X ray diffraction (XRD) techniques. Raman and XRD studies have confirmed that annealing stimulates the ZnO oxidation and crystallization with the formation of wurtzite ZnO NCs. The ZnO NC size decreases from 250-300 nm down to 40-60 nm with increasing the etching time. Two PL bands connected with the near-band edge (NBE) and defect-related emissions have been detected. Their intensity stimulation with NC size decreasing has been detected. The NBE emission enhancement is attributed to the week quantum confinement and exciton-light coupling with polariton formation in small ZnO NCs. The luminescence, morphology, and crystal structure of ZnO:Cu NCs versus Cu concentration have been investigated as well. The types of Cu-related complexes are discussed using the correlation between the PL spectrum transformations and XRD parameters. It is shown that the plasmon generation in Cu nanoparticles leads to the surface enhanced Raman scattering (SERS) effect and to PL intensity increasing the defect-related PL bands. The comparison of ZnO and ZnO:Cu NC emissions has been done and discussed.

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Emission of ZnO:Ag nanorods obtained by ultrasonic spray pyrolysis

Cited by 30 publications

References 35 publications

Photoluminescence trend in mixture of zinc oxide and carbon nanoparticles after mechanical processing

Photoluminescence trend in mixture of zinc oxide and carbon nanoparticles after mechanical processing

Spray Pyrolysis Technique; High-K Dielectric Films and Luminescent Materials: A Review

Emission, Defects, and Structure of ZnO Nanocrystal Films Obtained by Electrochemical Method

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