Thin Film ZnO Coated on FTO/TiO2 as an Anti Reflection Coating for Enhancing Visible Light Harversting in Dye Sensitized Solar Cells System

ZnOmaterial has unique electrical and optical properties that many important applications, including as an anti-reflection coating in dye sensitized solar cells. Flat anti-reflective coatings (ARC) made of ZnO on top to improve the optical properties of the coating. In this study, ZnO nanoparticle were coated with TiO2 nanolayers by a simple wet chemical route. TiO2 nanorods coated ZnO nanoparticle was synthesized by two step i.e. (1) base hydrolysis and polymerization of TiO2 (2) ZnO nanoparticle were coated with a TiO2 layer. The TiO2 coated ZnO prepared was characterized by X-ray diffraction (XRD), Reflectance spectroscopy, SEM and TEM. ZnO annealed at a temperature of 400 degrees C have the greatest crystal size than annealedat a temperature of 500 degrees C and 600 degrees C. While, the Reflectance (%R)properties shows that the higher annealing temperature of ZnO preparations, the higher of %R value of ZnO thin layer. The ZnO prepared by annealed at 400 degrees C gain a good performance of the lowest reflectance value. The difference properties are due to differences of light scattering resulting from the crystal size effect. The crystals size that have a good performance as an anti-reflection is around 20 nm, result study of ZnO annealed at 400 degrees C. TEM nanograph shows that the synthesized ZnO have spherical morphology. The optimum performance ofDSSCs was conducted using the photoanode ZnO-coated TiO2 at present 10%APTMS as surface modifier anchor dye group. Bythe addition of ARC we have been capable improve cell performance so that cells achieve an efficiency of 1.13%. (C) 2016 The Authors. Published by Elsevier B.V.