Electrochromic Property of MoO3 Thin Films Deposited by Chemical Vapor Transport Synthesis

Abstract

The transmittance of electrochromic MoO3 thin films by chemical vapor transport (CVT) deposition and post-annealing on indium tin oxide (ITO) glass reached 80% with low reflectivity. Optical analysis demonstrated a 3.60 eV band gap energy in MoO3 thin film. Transmittance changes of 50% between coloration and decoloration (similar to 30 and similar to 80%) at 533 nm under the bias change frequency revealed reversible electrochromic properties and stability. A coloration efficiency of the annealed MoO3 thin film was 23.7 cm(2)/C. Coloration responsibility was predominant with reliable performances by bias change. (C) 2011 The Japan Society of Applied Physics