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Influence of Thermal Annealing to Material Properties of TiO2, ZnO, and TiO2/ZnO Bilayer Films by Sol-Gel Method

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Title Influence of Thermal Annealing to Material Properties of TiO2, ZnO, and TiO2/ZnO Bilayer Films by Sol-Gel Method
 
Creator Gareso, Paulus Lobo
Juarlin, Eko
Heryanto, Heryanto
Taba, Paulina
Aryanto, Didik
 
Subject Sol-gel method
Thermal annealing
TiO2/ZnO bilayer thin films
 
Description 218-226
This study reported on the material properties of TiO2, ZnO, and TiO2/ZnO bilayer thin films fabricated by sol-gel spin
coating technique after annealing. ZnO thin films were prepared by dissolving zinc acetate dehydrated into a solvent of
ethanol and diethanolamine (DEA) was later added. Meanwhile, for TiO2 films, titanium tetraisopropoxide (TTIP) was
dissolved into ethanol and an acetate acid was added. Afterwards all film samples were annealed at different temperatures in
the range of 400 – 600 oC for 60 minutes. For TiO2/ZnO bilayer thin films, the structural properties showed that after
annealing at 600 oC, the X-RD peak intensity was more pronounced compared to at 400 and 500 oC. This indicated that the
amorphous phase of the films decreased after annealing at 600 oC. Furthermore, the crystallite sizes of the films increase as
the annealing temperature increased to 600 oC, while the strain reduces at this temperature. In the case of (UV-Vis)
spectroscopy, it was seen that after annealing the transmittance value of the TiO2/ZnO bilayer increase. The band gap energy
of the films consists of low and high energy. The low energy which is around 3.30 eV refers to the transitions of valenceconduction
band in ZnO films and high energy was around 3.60 eV corresponding to the impurity transitions. In addition,
the refractive index (n), the extinction coefficient (k), and the real and imaginary part of dielectric constant were determined
from the transmittance and absorbance spectra results. Based on the SEM results indicate that there was no cluster in the
surface of TiO2/ZnO bilayer thin films.
 
Date 2022-04-07T11:20:09Z
2022-04-07T11:20:09Z
2022-03
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscair.res.in/handle/123456789/59496
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJPAP Vol.60(03) [March 2022]