Abstracts Book - IMRC 2018

• SF2-P065
SURFACE MORPHOLOGIES OF ZINC OXIDE THIN FILMS FROM
DIFFERENT INDIUM PRECURSORS
Rajesh Roshan Biswal 1 , Arturo Maldonado Alvarez 2 , Maria de la Luz Olvera Amador 2
1 Instituto Tecnologico Superior de Misantla, , Mexico. 2 Centro de Investigación y de Estudios
Avanzados del IPN - CINVESTAV, Ingenieria electrica, Mexico.
A novel and simple wet chemical process for ZnO:In hexagonal micro-slices is
reported. The size and the shape of the microstructure can be manipulated
easily by the hydrolysis of the precursor solution which is carried out by
controlling the amount of water in the solution. ZnO:In thin film containing
wurtzite particles were synthesized via zinc acetate hydrolyzing in methanol and
acetic acid at a constant molar concentration of 0.2 M using ultrasonic spray
pyrolysis. Three different indium sources, i.e, indium acetate, indium sulphate
and indium chloride were used as the dopant source having concentrations of
1-3 at.% and deposited at substrate temperatures in the 385-445 0 C interval. It
was observed that water content in the starting solution plays a significant role
in determining the surface morphology, which in turn influences the optical and
electrical properties of the films. With the increase in the water content, the
shape of ZnO:In particles varied from irregular, non-uniform particles to regular
hexagonal slices. Moreover, the height of the particles decreased as the volume
of water in the starting solution increased. Finally, with the highest water
content, uniform distribution of hexagonal slices were obtained which clearly
demonstrates that water is crucial in determining the growth and shape of
ZnO:In particles.
Keywords: Zinc oxide, Thin films, Ultrasonic spray pyrolysis
Presenting authors email: rroshanb@itsm.edu.mx