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Paper Details

Synthesis and Electroluminescence of Manganese Activated ZnSe/PVA Nanocomposite

Nitendra Kumar Gautam1, 2, Sahid Shamim Naik1, R.K. Kuraria2, S.R. Kuraria2 and M. Ramrakhiani1

Journal Title:Journal of Chemical, Biological and physical sciences

Mn doped ZnSe nanoparticles in polyvinyl alcohol (PVA) matrix were prepared by single step solution method. All the ZnSe:Mn/PVA film samples were prepared by changing PVA loading. X-Ray Diffraction (XRD) technique was used to characterize the final product. It was found by absorption spectra that the absorption edge was shifted towards lower wavelengths with increasing loading of PVA in ZnSe:Mn/PVA nanocomposite. PVA acts as a capping agent so when there was increase in PVA loading the particles were capped and hence smaller ZnSe:Mn nanoparticles were obtained. For Electroluminescence (EL) study of ZnSe:Mn/PVA films were deposited onto the conducting glass plates and EL cells were prepared by using aluminum foil as an electrode and conducting glass plate itself acted as second electrode. The EL brightness of the cell with different PVA loading was recorded at various frequencies. EL started at threshold voltage and then EL brightness increased with the applied voltage. At any particular voltage higher brightness was obtained for smaller particle size and higher frequency. It was observed that there was linear relation between current and voltage for all samples. It was found that samples having smaller particle size shows better EL and impedance was also lower for them.