Characterisation of Spray Deposited MnO2 Thin Films

Abstract

Manganese dioxide is a low band gap, high optical constant semiconductor that exhibits ferroelectric properties. This material has in recent years had a variety of applications, particularly as an electrode, in electrochemical and electrochromic batteries, in fuel cells as well as in energy efficient device applications. Like most of the pure oxide crystals, undoped MnO2 is normally an electrical, insulator. Manganese dioxide is prepared by spray pyrolysis technique due to simple, inexpensive and reproducible property. Complementary investigation such as X-Ray Diffraction, SEM are used to study structural and morphology of MnO2 thin film Microstructural studies indicate that powders were crystalline in nature. It was found that grain size for the preferential orientation is in the order of nanometer.