Abstracts Book - IMRC 2018

• SB4-P017
SYNTHESIS AND CHARACTERIZATION OF SnO2/TiO2 THIN FILMS
BY SOL-GEL PROCESS FOR OPTOELECTRONIC APPLICATIONS
Hernan Hernandez Carrillo 1 , Maria de la Luz Mota González 1 , Angel Sauceda Carvajal 1 , Gerardo
Gutierrez Heredía 2 , Laura A Carrasco Chavez 1 , Amanda Carrillo Castillo 1
1
Universidad Autónoma de Ciudad Juárez, Departamento de Ingeniería Eléctrica y
Computación, Instituto de Ingeniería y Tecnología, Mexico. 2 Centro de Investigaciones en
Optica, , Mexico.
In this study, the deposition and characterization of SnO2/TiO2 bilayers in
solution are reported. Tin oxide (SnO2) has been synthesized by a sol-gel method
using SnCl2 as Sn precursor. This method offers several advantages such as film
thickness control, homogeneity, low processing cost and low temperature,
which are all ideal for the development of flexible electronic devices. The SnO2
was deposited at 70 °C on glass substrates by spin coating co-deposition. The
titanium oxide (TiO2) films were obtained TiO2 nanoparticles synthesized by solgel
for which titanuim isopropoxide was used as Ti source in water and ethanol.
The obtained nanoparticles were then spun coated on the SnO2 film at 60
°C. We found the nanoparticles size to be dependent on the Ti ion
concentration. FTIR was used to determinate the chemical composition of the
precursor solutions. Ultraviolet-visible spectroscopy (UV-Vis) was used to
determine the absorption edge and the optical band gap. Scanning electron
microscopy (SEM), X ray diffraction (XRD) and phase shifting optical profilometry
were used to study the microstructure of the films. Remarkable changes were
found in terms of optical properties, absorption and transmittance. The bilayer
proves to be a composite with the properties desired in an active layer for
optoelectronic devices.
Acknowledgment:
Al Proyecto CB-2013-01, y PN 2016 3529.
Keywords: SnO2 films, TiO2 nanoparticles, bilayer
Presenting authors email: amanda.carrillo@uacj.mx