• Aucun résultat trouvé

Correlation between structural and opticalproperties of SiO2/TiO2multibilayers processedby sol-gel technique and applied toBraggreflectors

N/A
N/A
Info
Télécharger
Protected

Academic year: 2021

Partager "Correlation between structural and opticalproperties of SiO2/TiO2multibilayers processedby sol-gel technique and applied toBraggreflectors"

Copied!
1
0
0

Chargement.... (Voir le texte intégral maintenant)

Texte intégral

(1)

Materials Science: An Indian Journal

Volume 9, Issue 3, 2013, Pages 113-118

Correlation between structural and optical properties of SiO2/TiO2multibilayers processed

by sol-gel technique and applied toBragg reflectors

H.Sedrati, R.Bensaha, M.Brahimi, H.DEHDOUH, H.Bensouyad, F.Abbas, B.Toubal

Abstract: SiO2 and TiO2 thin layers processed by sol-gel technique have been deposited,alternatively, on glass substrates and Si (111) wafer. Dip-coatedmultibilayerswere characterized by different experimental techniques:XRD,SEM, FTIRandUV-VIS-NIR.

The obtainedX-ray diffraction patterns analysishave shown that our films crystallize in anatase and rutile phases whateveris the number of bilayers and the corresponding grain sizes increasefrom 5.48 nmto 16.11 nm. The SEMmicrograph shows that our layers arehomogeneous without any visual cracks. The FTIR spectra have shownthat the vibration of Si-O-Ti bonds becomes intense by the increase in thenumber of bilayers. This increase, on the on hand, decreases the transmissioncoefficient from 4.58% to 0.55% and increases the width of the stopband shown in UV-VIS-NIR spectra. On the other hand, the band-gap decreasesfrom3.73 eV to 3.59 eV. In addition, a pseudo band-gap is locatedbetween 300 nmand 400 increasing from1.76 eVto 2.29 eV.? 2013 Trade Science Inc. - INDIA

Keywords : Sol-gel;, Anatase;, Rutile;, Stop band;, Si-O-Ti;, Band-gap.

Centre de Recherche en Technologies Industrielles - CRTI - www.crti.dz

Powered by TCPDF (www.tcpdf.org)

Références

Télécharger maintenant ( PDF - 1 Page - 7.89 KB )

Documents relatifs

3D simulation of pinch and welding using form 3D

L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB.

NEUTRON DIFFRACTION AND STRUCTURE OF THE ADSORBED PHASES

- Study of physisorption by neutron diffraction is discussed critically, especially in relation to our previous results for krypton or graphite.. It is shown that

STUDY OF STRUCTURAL , OPTICAL AND ELECTRICAL PROPERTIES OF ZnO THIN FILMS PREPARED BY SOL-GEL TECHNIQUE

c Spectrometry Department, Nuclear Technical Division, Nuclear Research Centre of Algiers, 2 Bd, Frantz Fanon, BP 399, Algiers 16000,

Electrochemical, Structural, and opticalproperties of Tin oxide thin films

Abstract : ABSTRACT SnO2 thin films were electrodeposited on fluorine tin oxide substrate in nitric acid solution.. The films were found uniform, adherent to the substrate

Qualitative and Quantitative Assessment of ? and ? Phases in Duplex Stainless Steel Weldments by the X-Ray Diffraction Technique

The first weldment realized by gas tungsten arc welding process GTAW with ER2209 electrode, the second weldment by shielded metal arc welding process SMAW with E2209-15 electrode?.

Qualitative and Quantitative Assessment of γ and δ Phases in Duplex Stainless Steel Weldments by the X-Ray Diffraction Technique

The X-ray diffraction technique is one of the methods used to study the microstructural evolution of steels in the different area of weldment, base metal BM, heat affected zone HAZ

Electrochemical, Structural, and OpticalProperties of SnO2 thin films

It is shown that the band gap was found to increase from 4 eV to 4.036 eV after heat treatment at 600°C.Electrochemical results obtained in aqueous medium: KOH, KI, LiClO4 and

STRUCTURAL AND OPTICAL PROPERTIES OF ZnO THIN FILMS PREPARED BY SOL-GEL PROCESS

The structural and optical properties of ZnO thin films have been investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and spectroscopy UV-visible..