Characterization of PbS/PVA/GQDs nanocomposite prepared by chemical bath deposition method

¹ Department of Physics, Azarbaijan Shahid Madani University, Tabriz, Iran
² Analytical Chemistry Research Lab., Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran

^a e-mail: m.tohidi@azaruniv.edu

Received: 14 April 2014
Revised: 1 July 2014
Accepted: 1 September 2014
Published online: 10 October 2014

Abstract

This work reports synthesis of PbS quantum dots (QDs) embedded in the poly-vinyl alcohol (PVA) in the presence of graphene quantum dots (GQDs) by the low cost and simple method of chemical bath deposition. The as-synthesized products were characterized by X-ray diffraction, transmission electron microscope and optical studies; absorption and photoluminescence measurements. Results showed that in comparison with GQDs and PbS/PVA, photoluminescence intensity of PbS/PVA/GQDs was improved and this could be attributed to rigidity of the local environment, PVA passivation and energy transformation between GQDs and PbS QDs. These analyses determined good distribution of PbS QDs on GQDs planes which is promising for practical applications in nanotechnology.