Influence of Mg on the Structural and Optical Properties of LiNbO3 Thin Films Grown by Polymeric Precursor Method

2005 ◽  
Vol 498-499 ◽  
pp. 342-349
Author(s):  
A.Z. Simões ◽  
V. Bouquet ◽  
F. Moura ◽  
A. Ries ◽  
M.A. Zaghete ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Precursor Solution ◽  
Polymeric Precursor ◽  
X Ray Diffraction ◽  
Oriented Growth ◽  
Precursor Method ◽  
Diffraction Patterns ◽  
Mg Doped ◽  
Magnesium Addition

A polymeric precursor solution was used to deposit pure and Mg doped LiNbO3 thin films on sapphire substrates by spin-coating. The effects of magnesium addition on crystallinity, morphology and optical properties of the annealed films were investigated. X-ray diffraction patterns indicate the oriented growth of the films. Phi-scan diffraction evidenced the epitaxial growth with two in-plane variants. AFM studies show that the films are very homogeneous, dense and present smooth surfaces. The refractive index and optical losses obtained by the prism coupling method were influenced by the magnesium addition.

scholarly journals Microstructural, structural and optical properties of nanoparticles of PbO-CrO3 pigment synthesized by a soft route

Cerâmica ◽  
2015 ◽  
Vol 61 (357) ◽  
pp. 118-125 ◽  
Author(s):  
V. D. Araújo ◽  
M. R. B. Andreeta ◽  
L. J. Q. Maia ◽  
R. M. Nascimento ◽  
F. V. Motta ◽  
...  
Keyword(s):  
Optical Properties ◽  
Diffuse Reflectance ◽  
Microstructural Properties ◽  
Polymeric Precursor ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Precursor Method ◽  
X Ray ◽  
Diffraction Patterns ◽  
Good Agreement

PbCrO4 and Pb2CrO5 particles were synthesized by the polymeric precursor method. Structural and microstructural properties of the particles were characterized by scanning electron microscopy with field emission gun, X-ray diffraction, and Raman spectroscopy techniques. The diffuse reflectance technique was employed to study the optical properties in the 400-700 nm range. The optical bandgap of the samples was obtained indirectly. Colorimetric coordinates L*, a*, b* were calculated for the pigment powders as a function of the heat treatment (400-700 ºC). The powders displayed colors ranging from green to red. X-ray diffraction patterns showed the presence of monoclinic PbCrO4 phase in green samples, while red powders had a monoclinic Pb2CrO5 phase structure. The Raman spectra of the PbCrO4 and Pb2CrO5 powders were in good agreement with those reported in the literature. The synthesized compounds can be used as green and red pigments with high thermal stability.

Effect of Deposition Time on Structural and Optical Properties of ZnO Thin Films Deposited by Spray Pyrolysis

2019 ◽  
Vol 397 ◽  
pp. 81-87 ◽  
Author(s):  
Farid Khediri ◽  
Abdelkader Hafdallah ◽  
Mouna Bouhelal
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Deposition Time ◽  
Spray Pyrolysis Technique ◽  
Precursor Solution ◽  
Zno Thin Films ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray

In this work Zinc oxide thin films prepared by spray pyrolysis technique. A set of ZnO thin films were deposited with various deposition times, on glass substrate at 350 °C. The precursor solution is formed with zinc acetate in distilled methanol with 0.1 molarity. The deposition time was ranged from 2 to 8 min. The structural and optical properties of those films were examined by X-ray diffraction (XRD) and ultraviolet-visible spectrometer (UV). X-ray diffraction patterns of the ZnO thin films showed polycrystalline hexagonal wurtzite structure and the preferred orientation was along (002) plane when the grain size varied between 9.66 and 16.67nm. ZnO thin films were highly transparent in the visible with the maximum transmittance of 85% and the optical band gap was found between 3.25 and 3.28 eV.

Optical properties of potassium niobate thin films prepared by the polymeric precursor method

2005 ◽  
Vol 59 (5) ◽  
pp. 598-602 ◽  
Author(s):  
A.Z. Simões ◽  
A. Ries ◽  
C.S. Riccardi ◽  
M.A. Zaghete ◽  
J.A. Varela
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Potassium Niobate ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method

scholarly journals Epitaxially grown LiNbO3 thin films by polymeric precursor method

2000 ◽  
Vol 15 (11) ◽  
pp. 2446-2453 ◽  
Author(s):  
V. Bouquet ◽  
M. I. B. Bernardi ◽  
S. M. Zanetti ◽  
E. R. Leite ◽  
E. Longo ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Optical Transmittance ◽  
Dip Coating ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Chemical Route ◽  
Axis Orientation ◽  
Coating Solution

LiNbO3 thin films were grown on (0001) sapphire substrates by a chemical route, using the polymeric precursor method. The overall process consists of preparing a coating solution from the Pechini process, based on metallic citrate polymerization. The precursor films, deposited by dip coating, are then heat treated to eliminate the organic material and to synthesize the phase. In this work, we studied the influence of the heat treatment on the structural and optical properties of single-layered films. Two routes were also investigated to increase the film thickness: increasing the viscosity of the coating solution and/or increasing the number of successively deposited layers. The x-ray diffraction θ-2θ scans revealed the c-axis orientation of the single- and multilayered films and showed that efficient crystallization can be obtained at temperatures as low as 400 °C. The phi-scan diffraction evidenced the epitaxial growth with two in-plane variants. A microstructural study revealed that the films were crack free, homogeneous, and relatively dense. Finally, the investigation of the optical properties (optical transmittance and refractive index) confirmed the good quality of the films. These results indicate that the polymeric precursor method is a promising process to develop lithium niobate waveguides.

Influence of pH Value on the Phases, Morphologies and Optical Properties of Sm2S3 Thin Films

2012 ◽  
Vol 512-515 ◽  
pp. 368-371
Author(s):  
Yan Chao Hou ◽  
Jian Feng Huang ◽  
Li Yun Cao ◽  
Jian Peng Wu
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Ph Value ◽  
Visible Spectrum ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
Oriented Growth ◽  
Force Microscopy ◽  
Atomic Force ◽  
Surface Morphologies

Sm2S3 thin films were prepared on Si (100) substrates by liquid phase self–assemble method. The influences of solution pH value on the phases, surface morphologies and optical properties of the as deposited films were investigated. The as–deposited Sm2S3 thin films were characterized by X–ray diffraction (XRD), atomic force microscopy (AFM) and ultraviolet-visible (UV–Vis). Results indicate that Sm2S3 thin film with oriented growth along (105) direction can be obtained at pH value of 3.0, deposition temperature of 80 °C, following deposition for 24 h. The grain sizes of the Sm2S3 first increase and then decrease with increasing pH value. The as–deposited thin films exhibit a dense and crystallinized surface morphology. The film shows good transmittance in visible spectrum and excellent absorbency of ultraviolet light, and the bandgap of the thin films at pH of 3.0 is calculated to be 4.06 eV.

Crystallographic, Dielectric and Optical Properties of SrBi 2 Ta 2 O 9 Thin Films Prepared by the Polymeric Precursor Method

2002 ◽  
Vol 271 (1) ◽  
pp. 259-264 ◽  
Author(s):  
Sônia Maria Zanetti ◽  
Vanessa C. M. Sotilo ◽  
Edson R. Leite ◽  
Elson Longo ◽  
José A. Varela
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Dielectric And Optical Properties

scholarly journals Preparation of 0.055BaZrO3–0.935(K0.45Na0.5Li0.05)NbO3–0.01(Bi0.5Na0.5)TiO3 piezoelectric thin films from precursor solution by Pechini method

2017 ◽  
Vol 07 (02) ◽  
pp. 1750014 ◽  
Author(s):  
Liqiang Liu ◽  
Tomoaki Karaki ◽  
Tadashi Fujii ◽  
Yuichi Sakai
Keyword(s):  
Thin Films ◽  
Preparation Method ◽  
Pechini Method ◽  
Precursor Solution ◽  
Lead Free ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Si Substrates ◽  
Piezoelectric Thin Films

Lead-free piezoelectric thin films of 0.055BaZrO3–0.935(K[Formula: see text]Na[Formula: see text]Li[Formula: see text])NbO3–0.01(Bi[Formula: see text]Na[Formula: see text])TiO3 (BZ–KNLN–BNT) were fabricated on (100)-LaNiO3/SiO2/Si substrates. The Pechini (polymeric precursor) method was carried out to prepare the complicated multi-component precursor solution. This method was suited for controlling the complex components accurately. The films crystallized at 700[Formula: see text]C showed a (100)pc-oriented perovskite structure, whose grain size was about 200[Formula: see text]nm and thickness was about 700[Formula: see text]nm. The Curie temperature [Formula: see text]c of the films was 292[Formula: see text]C that was near to that of the bulk ceramics. The preparation method used in this work provided a possibility for the application of multi-component lead-free piezoelectric films.

scholarly journals Micro-structural, Morphological and Optical Properties of Pure and Metal (Mn & Mg) Doped ZnO Thin Films by Low Cost SILAR Method

2019 ◽  
Vol 31 (4) ◽  
pp. 901-906
Author(s):  
K. Radhi Devi ◽  
G. Selvan ◽  
M. Karunakaran ◽  
K. Kasirajan
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Low Cost ◽  
Zno Thin Films ◽  
X Ray Diffraction ◽  
Silar Method ◽  
Glass Substrates ◽  
Uv Visible ◽  
Doped Zno ◽  
Mg Doped

Pure and metals (Mn & Mg) doped zinc oxide (ZnO, ZnO/Mn and ZnO/Mg) thin films have been successfully grown onto a glass substrates by low cost SILAR method. The structural, morphological, compositional, functional group and optical properties of the prepared films were studied using X-ray diffraction, scanning electron microscope and EDAX, FTIR and UV-visible spectrophotometer, respectively. The structure of the films were found to be hexagonal with polycrystalline in nature with preferential orientation along (002) plane. From Fourier Transform Infrared spectroscopy, the presence of functional groups and its corresponding molecular vibrations were assessed. In UV-visible spectroscopy, the obtained direct optical band gap values 3.46, 3.56 and 3.7 eV for pure, Mn and Mg doped ZnO thin films, respectively. Morphological results showed that the remarkable changes in morphology due to the effect of metal doping. EDAX studies showed that the presence of zinc and oxygen content and also a doping metal ions.

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