Large area assemblies of electrochromic nanomaterials

Abstract

Tungsten Trioxide (WO3) nanorods and Vanadium Pentoxide hydrate (V205.nH2O) nanobelts were synthesized by the hydrothermal method. Stability of electrochromic materials suspension used for large area assemblies by cold-spray and drop-casting method was examined by adding suitable common surfactants. Results show that surfactants have the potential to enhance the electrochromic performance of materials deposited by the above methods by allowing a thinner and more homogeneous coating to form on substrates. Finally, factors affecting the morphology of V205.nH2O were also investigated. Results show that it is possible to obtain belt-shaped nanoparticles of V205.nH2O using NH4VO3 and 1.0M HNO3 as precursor under a hydrothermal synthesizing condition of 120oC for 8hrs.