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The study of CdS Concentration on the Optical, Structural, Electrical and
Morphological Properties of CdS/PVA Composite Film
Ain Kartini binti Abd Jalil
Supervisor: Dr. Chan Kok Sheng
Bachelor of Applied Science (Electronics and Instrumentation Physics)
School of Ocean Engineering
Cadmium sulfide (CdS) nanoparticles known as a good semiconductor were
synthesized with polyvinyl alcohol (PVA) matrix in different concentration to
investigate the effect of CdS nanoparticles on structural properties and electrical
conductivity as a conductive polymer. The prepared films were characterized by using
XRD, UV-vis, FTIR, SEM and EIS. The amount concentration of Cd + used strongly
influenced the size of CdS nanoparticles, which were observed by XRD, UV-vis and
SEM. Result of XRD indicated CdS nanoparticles were formed in hexagonal crystal
structure. UV-vis observed the energy band gap was increased when amount of
concentration decrease. SEM showed smaller grains of image when higher
concentration of CdS was used. FTIR showed increase of its intensity since it indicates
the hydroxyl group was the active cites and peaks became broader and strong after
adding the CdS. EIS observed an increasing in electrical conductivity when there was
reduction in particle size of CdS.
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