Al-doped and pure ZnO thin films elaborated by sol–gel spin coating process for optoelectronic applications

AbstractNeodymium niobate NdNbO4 (NNO) and tantalate NdTaO4 (NTO) thin films (~100 nm) were prepared by sol-gel/spin-coating process on Pb(Zr0.52Ti0.48)O3/Al2O3 substrates with annealing at 1000°C. The precursors of films were synthesized using Nb or Ta tartrate complexes. The XRD results of NNO and NTO films confirmed tetragonal T-NdNbO4 and T-NdTaO4 phases, respectively, with traces of monoclinic MNdNbO4 and M´-NdTaO4. The surface morphology and topography were investigated by SEM and AFM analysis. NTO was smoother with roughness 5.24 nm in comparison with NNO (6.95 nm). In the microstructure of NNO, small spherical (~ 20-50 nm) T-NdNbO4 and larger needle-like particles (~100 nm) of M-NdNbO4 phase were observed. The compact clusters composed of fine spherical T-NdTaO4 particles (~ 50 nm) and cuboidal M´-NdTaO4 particles (~ 100 nm) were found in NTO. The results of this work can contribute to formation of different polymorphs of films for the application in environmental electrolytic thin film devices.

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The effect of solvents and the thickness on structural, optical and electrical properties of ITO thin films prepared by a sol–gel spin-coating process

Journal of Nanostructure in Chemistry ◽

10.1007/s40097-014-0089-y ◽

2014 ◽

Vol 4 (1) ◽

Cited By ~ 12

Author(s):

Mohsen Moradi-Haji Jafan ◽

Mohammad-Reza Zamani-Meymian ◽

Rahmatollah Rahimi ◽

Mahboubeh Rabbani

Keyword(s):

Thin Films ◽

Electrical Properties ◽

Spin Coating ◽

Sol Gel ◽

Coating Process ◽

Optical And Electrical Properties ◽

Spin Coating Process ◽

Effect Of Solvents ◽

Ito Thin Films

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Effects of Annealing Condition on the Preparation of Indium-Tin Oxide (ITO) Thin Films via Sol-Gel Spin Coating Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.492-493.325 ◽

2005 ◽

Vol 492-493 ◽

pp. 325-330

Author(s):

Hyun-Woong Han ◽

Young Hoon Yun ◽

Sung Churl Choi

Keyword(s):

Thin Films ◽

Tin Oxide ◽

Indium Tin Oxide ◽

Spin Coating ◽

Sol Gel ◽

Annealing Process ◽

Coating Process ◽

Spin Coating Process ◽

Ito Thin Films ◽

Surface Morphologies

Indium tin oxide (ITO) thin films were deposited on glass substrates via sol-gel spin coating process from a mixed solution of Indium (Ⅲ) acetylacetonate and Tin (Ⅳ) iso-propoxide. Then, ITO thin films were fired at 500°C, and then annealed at 500°C for 30 min with the sequential annealing process; VacuumN2Ar/H2, N2Ar/H2 and Ar/H2 gas. The effects of the different annealing processes on the surface morphologies and sheet resistance of ITO thin films were investigated. Sheet resistance values of ITO thin films treated under VacuumN2Ar/H2, N2Ar/H2 and Ar/H2 annealing process were 1.25 kohm/sq., 3.18 kohm/sq. and 4.92 kohm/sq., respectively. Actually, the sequential atmosphere gases and non-oxidizing gas, which were used in annealing process influenced the microstructural features or surface morphologies of ITO thin films: grain size and surface roughness. Thus, it was presumed that the sequential annealing condition influenced the densification behavior in the microstructural evolution of ITO thin films.

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Phase Composition of Samarium Niobate and Tantalate Thin Films Prepared by Sol-Gel Method

Powder Metallurgy Progress ◽

10.1515/pmp-2017-0002 ◽

2017 ◽

Vol 17 (1) ◽

pp. 10-20

Author(s):

H. Bruncková ◽

Ľ. Medvecký ◽

E. Múdra ◽

A. Kovalčiková ◽

J. Ďurišin ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Phase Composition ◽

Surface Morphology ◽

Spin Coating ◽

Sol Gel ◽

Coating Process ◽

Spin Coating Process ◽

Afm Analysis ◽

Thin Film Devices

Abstract Samarium niobate SmNbO4 (SNO) and tantalate SmTaO4 (STO) thin films (~100 nm) were prepared by sol-gel/spin-coating process on alumina substrates with PZT interlayer and annealing at 1000°C. The precursors of films were synthesized using Nb or Ta tartrate complexes. The improvement of the crystallinity of monoclinic M′-SmTaO4 phase via heating was observed through the coexistence of small amounts of tetragonal T-SmTa7O19 phase in STO precursor at 1000°C. The XRD results of SNO and STO films confirmed monoclinic M-SmNbO4 and M′-SmTaO4 phases, respectively, with traces of orthorhombic O-SmNbO4 (in SNO). In STO film, the single monoclinic M′-SmTaO4 phase was revealed. The surface morphology and topography of thin films were investigated by SEM and AFM analysis. STO film was smoother with roughness 3.2 nm in comparison with SNO (6.3 nm). In the microstructure of SNO film, small spherical (~50 nm) and larger cuboidal particles (~100 nm) of the SmNbO4 phase were observed. In STO, compact clusters composed of fine spherical SmTaO4 particles (~20-50 nm) were found. Effect of samarium can contribute to the formation different polymorphs of these films for the application to environmental electrolytic thin film devices.

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