scholarly journals Controlling Phase Purity and Texture of K0.5Na0.5NbO3 Thin Films by Aqueous Chemical Solution Deposition

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2042 ◽  
Author(s):  
Nikolai Helth Gaukås ◽  
Silje Marie Dale ◽  
Trygve Magnus Ræder ◽  
Andreas Toresen ◽  
Randi Holmestad ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Processing ◽  
Chemical Solution Deposition ◽  
Alkali Metals ◽  
Decomposition Temperature ◽  
Chemical Solution ◽  
Secondary Phases ◽  
Solution Deposition ◽  
Phase Purity ◽  
Phase Pure

Aqueous chemical solution deposition (CSD) of lead-free ferroelectric K0.5Na0.5NbO3 (KNN) thin films has a great potential for cost-effective and environmentally friendly components in microelectronics. Phase purity of KNN is, however, a persistent challenge due to the volatility of alkali metal oxides, usually countered by using excess alkali metals in the precursor solutions. Here, we report on the development of two different aqueous precursor solutions for CSD of KNN films, and we demonstrate that the decomposition process during thermal processing of the films is of detrimental importance for promoting nucleation of KNN and suppressing the formation of secondary phases. Based on thermal analysis, X-ray diffraction and IR spectroscopy of films as well as powders prepared from the solutions, it was revealed that the decomposition temperature can be controlled by chemistry resulting in phase pure KNN films. A columnar microstructure with out-of-plane texturing was observed in the phase pure KNN films, demonstrating that the microstructure is directly coupled to the thermal processing of the films.

Lead Free Bi1/2Na1/2TiO3-CoFe2O4 Magnetoelectric Nanoparticulate Composite Thin Films Prepared by Chemical Solution Deposition Method

2018 ◽  
Vol 765 ◽  
pp. 30-33
Author(s):  
Vinod Kumar ◽  
Mintu Tyagi
Keyword(s):  
Thin Films ◽  
Chemical Solution Deposition ◽  
Ferroelectric Properties ◽  
Lead Free ◽  
Nanocomposite Films ◽  
Chemical Solution ◽  
Secondary Phases ◽  
Solution Deposition ◽  
Great Opportunity ◽  
Chemical Solution Deposition Method

Magnetoelectric (1−x) BNT−xCFO nanoparticulate thin films with (x= 0, 0.1, 0.2, 0.3) were fabricated by a chemical solution deposition technique. The X-ray diffraction shows that no other secondary phases are observed. Transmission electron microscope (TEM) revels that CFO nanoparticles were well distributed in matrix of BNT. The nanocomposite films exhibit both good magnetic and ferroelectric properties at room temperature (R-T), as well as enhanced magnetoelectric coupling. The composite withx= 0.2, showed the large value ofMEvoltage coefficient (αE) ~ 163 mV/cmOe. TheseMEcomposites provide a great opportunity as potential lead free systems forMEdevices.

scholarly journals Epitaxial K 0.5 Na 0.5 NbO 3 thin films by aqueous chemical solution deposition

2019 ◽  
Vol 6 (1) ◽  
pp. 180989 ◽  
Author(s):  
Ky-Nam Pham ◽  
Nikolai Helth Gaukås ◽  
Maxim Morozov ◽  
Thomas Tybell ◽  
Per Erik Vullum ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Processing ◽  
Chemical Solution Deposition ◽  
Rapid Thermal Processing ◽  
Secondary Phase ◽  
Epitaxial Films ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Polycrystalline Layer ◽  
Oriented Polycrystalline

We report on an environmentally friendly and versatile aqueous chemical solution deposition route to epitaxial K 0.5 Na 0.5 NbO 3 (KNN) thin films. The route is based on the spin coating of an aqueous solution of soluble precursors on SrTiO 3 single crystal substrates followed by pyrolysis at 400°C and annealing at 800°C using rapid thermal processing. Strongly textured films with homogeneous thickness were obtained on three different crystallographic orientations of SrTiO 3 . Epitaxial films were obtained on (111) SrTiO 3 substrates, while films consisting of an epitaxial layer close to the substrate followed by an oriented polycrystalline layer were obtained on (100) and (110) SrTiO 3 substrates. A K 2 Nb 4 O 11 secondary phase was observed on the surface of the thin films due to the evaporation of alkali species, while the use of an NaCl/KCl flux reduced the amount of the secondary phase. Ferroelectric behaviour of the films was investigated by PFM, and almost no dependence on the film crystallographic orientation was observed. The permittivity and loss tangent of the films with the NaCl/KCl flux were 870 and 0.04 (100-orientation) and 2250 and 0.025 (110-orientation), respectively, at 1 kHz.

Textured indium tin oxide thin films by chemical solution deposition and rapid thermal processing

2007 ◽  
Vol 515 (7-8) ◽  
pp. 3918-3926 ◽  
Author(s):  
Matthew L. Mottern ◽  
Frode Tyholdt ◽  
Alexander Ulyashin ◽  
Antonius T.J. van Helvoort ◽  
Henk Verweij ◽  
...  
Keyword(s):  
Thin Films ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Thermal Processing ◽  
Chemical Solution Deposition ◽  
Rapid Thermal Processing ◽  
Chemical Solution ◽  
Oxide Thin Films ◽  
Solution Deposition

scholarly journals Chemical Solution Deposition of La-Substituted BiFe0.5Sc0.5O3 Perovskite Thin Films on Different Substrates

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 307
Author(s):  
Diana Griesiute ◽  
Dovydas Karoblis ◽  
Lina Mikoliunaite ◽  
Aleksej Zarkov ◽  
Andrei N. Salak ◽  
...  
Keyword(s):  
Thin Films ◽  
Chemical Solution Deposition ◽  
Cost Effective ◽  
Deposition Process ◽  
Stability Study ◽  
Fused Silica ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Optimal Annealing Temperature ◽  
Xrd Patterns

In the present work, polycrystalline Bi0.67La0.33Fe0.5Sc0.5O3 thin films were synthesized using a simple and cost-effective chemical solution deposition process employing the spin coating technique. In order to check the feasibility of the fabrication of thin films on various types of substrates, the films were deposited on Pt-coated silicon, silicon, sapphire, corundum, fused silica and glass. Based on the results of thermogravimetric analysis of precursor and thermal stability study, it was determined that the optimal annealing temperature for the formation of perovskite structure is 600 °C. It was observed that the relative intensity of the pseudocubic peaks (001)p and (011)p in the XRD patterns is influenced by the nature of substrates, suggesting that the formed crystallites have some preferred orientation. Roughness of the films was determined to be dependent on the nature of the substrate.

The effect of complexing agents in chemical solution deposition of metal chalcogenide thin films

2021 ◽  
Author(s):  
Sucheta Sengupta ◽  
Rinki Aggarwal ◽  
Yuval Golan
Keyword(s):  
Thin Films ◽  
Chemical Solution Deposition ◽  
Metal Ion ◽  
Chemical Deposition ◽  
Review Article ◽  
Complexing Agents ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Metal Chalcogenide ◽  
Chalcogenide Thin Films

This review article gives an overview of different complexing agents used during chemical deposition of metal chalcogenide thin films and their role in controlling the resultant morphology by effective complexation of the metal ion.

An optimized process for fabrication of SrBi2Ta2O9 thin films using a novel chemical solution deposition technique

1999 ◽  
Vol 14 (11) ◽  
pp. 4395-4401 ◽  
Author(s):  
Seung-Hyun Kim ◽  
D. J. Kim ◽  
K. M. Lee ◽  
M. Park ◽  
A. I. Kingon ◽  
...  
Keyword(s):  
Thin Films ◽  
Chemical Solution Deposition ◽  
Low Voltage ◽  
Ferroelectric Properties ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Chemical Solution Deposition Method ◽  
Low Leakage ◽  
Low Leakage Current ◽  
Voltage Saturation

Ferroelectric SrBi2Ta2O9 (SBT) thin films on Pt/ZrO2/SiO2/Si were successfully prepared by using an alkanolamine-modified chemical solution deposition method. It was observed that alkanolamine provided stability to the SBT solution by retarding the hydrolysis and condensation rates. The crystallinity and the microstructure of the SBT thin films improved with increasing annealing temperature and were strongly correlated with the ferroelectric properties of the SBT thin films. The films annealed at 800 °C exhibited low leakage current density, low voltage saturation, high remanent polarization, and good fatigue characteristics at least up to 1010 switching cycles, indicating favorable behavior for memory applications.

Enhanced electrical conductivity of Au–LaNiO3 nanocomposite thin films by chemical solution deposition

RSC Advances ◽  
2015 ◽  
Vol 5 (94) ◽  
pp. 76783-76787 ◽  
Author(s):  
H. L. Wang ◽  
X. K. Ning ◽  
Z. J. Wang
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Electrical Properties ◽  
Chemical Solution Deposition ◽  
Nanocomposite Films ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Nanocomposite Thin Films ◽  
One Step

Au–LaNiO3 (Au–LNO) nanocomposite films with 3.84 at% Au were firstly fabricated by one-step chemical solution deposition (CSD), and their electrical properties were investigated.

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