Deposition and characterization of CdSe nanoparticles layer on ITO/PET flexible substrate by electrophoretic deposition

CdSe nanoparticles with various sizes were successfully synthesized using hot injection method. UV-vis Spectroscopy (UV-vis) was done to identify the absorption wavelength and then use to calculate the particle size of CdSe nanoparticles. The small nanoparticles were categorized as 2.77 nm, 3.06 nm and 3.52 nm whereas 4.06 nm and 5.43 nm were categorized as big nanoparticles. All these samples were undergone up to 4 times purification. Zeta Potential and Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) were done on these purified CdSe nanoparticles for quantitative analysis. Then these nanoparticle were deposited on the flexible substrate using electrophoretic deposition technique. The deposition efficiency of CdSe nanoparticles was influenced by the applied voltage. The applied voltage for big nanoparticles was larger than the small nanoparticles. When number of purification increases, the applied voltage for small size CdSe nanoparticles showed a decreasing trend whereas big size CdSe ...