Synthesis and Characterisation of Thin Films using Tanners Cassia, Nerium, Basil Leaf Extract Doped with Green Tea Extract Deposited by Single Dip Coating Method

In order to replace the rare and expensive inorganic and organic elements, we preferred plant extract which is very cost effective and eco-friendly and thus can be economic and effective alternative for the large scale synthesis. Herein we report for the first time, the synthesis and characterisation of thin films by using Green Tea, Tanner's cassia, Nerium oleander and Basil leaf extracts were investigated. The extracts were deposited by using dip coating method at �70 oC on glass substrates. The structural and optical properties of the samples were investigated by using XRD and UV-Vis absorption spectroscopy. The effect of the different solvents on the particle size was analysed by using XRD. Band gap energy and other optical constants of thin films were calculated by using UV-Vis absorption spectroscopy. High transmission properties of the prepared samples were proved by using UV-Vis absorption spectroscopy. Also visible photoluminescence (PL) emissions from the synthesized thin films were recorded. The elemental compositions of the samples were analysed by using energy dispersive X-ray analysis (EDAX).