Fabrication and characterization of ZnO/Zn2TiO4/ZnAl2O4 composite films by using magnetron sputtering with ceramic targets

Cubic Zn2TiO4 films were deposited on MgO (111) single crystal substrates using pulsed laser deposition (PLD). With the assistance of post-annealing process, the best epitaxial Zn2TiO4 film with only (111) single plane was obtained at 950[Formula: see text]C. For the best Zn 2TiO4single crystalline film, the full width at half maximum (FWHM) of the XRD [Formula: see text]rocking curve for the Zn2TiO4(111) diffraction peak was only 0.12[Formula: see text]. From the TEM spectrum, the film had a regular lattice arrangement and strong periodicity. Structural analysis indicated that the out-plane and in-plane epitaxial arrangement of the film/substrate separately were Zn2TiO 4(111)//MgO (111) and Zn2TiO4 [10[Formula: see text]]//MgO <10[Formula: see text]>. The optical properties of the films were investigated in detail. After removing the influence of the transmittance of the substrate, the relative transmittance of the films exceeded 90% and the optical band gap of the films varied between 3.84 and 4.38 eV.

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Nanoparticle-Composed Photosensitive Thin Films Based on ZnO

Dilova,

Dikovska,

Baeva

et al. 2024

Materials

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In this work, atmospheric pulsed laser deposition was used to prepare photosensitive elements. This technology is a practical and relatively inexpensive way of obtaining highly porous nanostructures composed of nanoparticles or nanoaggregates characterized by a large surface-to-volume ratio. Samples were produced via laser nanosecond or picosecond laser ablation of pure ZnO or mixed ZnO-TiO2 targets on quartz substrates with pre-deposited gold electrodes. The structure, morphology, optical, and electrical properties of the nanostructures obtained were studied regarding the sample composition and laser ablation regime applied. The ablation of a mixed ZnO-TiO2 target led to the fabrication of composite samples consisting of ZnO and Zn2TiO4 nanoparticles. The electrical properties of pure and composite samples were studied under exposure to UV light irradiation. It was found that the photosensitive properties of the samples depended on the ablation regime applied. The dark current measured for the nanosecond-deposited samples was a few nA, which was an order of magnitude larger compared to the picosecond-deposited samples. The value of the photogenerated current of the nanosecond-deposited samples was 103-times higher than that of the picosecond-deposited samples. This is due to the lower absorption of the picosecond-deposited samples, as well as to the presence of defect-related radiative recombination in the picosecond-deposited samples, which limits the photocurrent rise. The estimated rise and decay times were longer for the composite samples independently of the deposition regime applied.

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Fabrication and characterization of ZnO/Zn2TiO4/ZnAl2O4 composite films by using magnetron sputtering with ceramic targets

Cited by 3 publications

References 60 publications

Thermodynamic Study of High-Purity TiSi2 Prepared by Directional Solidification

Thermodynamic Study of High-Purity TiSi2 Prepared by Directional Solidification

Fabrication and characterization of monocrystalline Zn₂TiO₄ films on MgO (111) substrates by PLD

Nanoparticle-Composed Photosensitive Thin Films Based on ZnO

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Fabrication and characterization of ZnO/Zn2TiO4/ZnAl2O4 composite films by using magnetron sputtering with ceramic targets

Cited by 3 publications

References 60 publications

Thermodynamic Study of High-Purity TiSi2 Prepared by Directional Solidification

Thermodynamic Study of High-Purity TiSi2 Prepared by Directional Solidification

Fabrication and characterization of monocrystalline Zn2TiO4 films on MgO (111) substrates by PLD

Nanoparticle-Composed Photosensitive Thin Films Based on ZnO

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Product

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Fabrication and characterization of monocrystalline Zn₂TiO₄ films on MgO (111) substrates by PLD