Paper Title
The Role of Polyvinylpyrrolidoneon The Morphological and Optical Characteristics of Cadmium Oxide Filmssynthesized by Silar Method

Abstract
In this study, nanostructured cadmium oxide (CdO) films having various Polyvinylpyrrolidone (PVP) concentration have been grown on glass substrates by using successive ionic layer adsorption and reaction (SILAR) method. All deposited films were annealed at 350 °C for an hour in an air atmosphere to convert Cd(OH)2 into CdO. In order to reveal the effect of PVP on the morphological variations of CdO films,metallurgical microscope (MM) was used. The CdO films deposited with the aid of PVP surfactant exhibited different surface morphological features.Optical characteristics of CdO films such as transmittance and optical band gap values were evaluated by UV-Vis spectroscopy. The absorption edges of CdO films were shifted depending on the PVP concentration. Thus, optical absorption studies showed that optical band gap values were found to alter with the increase in the PVP concentration of the precursor solution.The average transmittance of all deposited films had also altered with the increasing PVP concentration. As a result, the addition of PVP organic surfactant significantly affects the growth mechanism of SILAR deposited CdO films. Keywords - Organic Surfactant, CdO Films, PVP, SILAR.