Enhanced electrochromic performance of f-MWCNT-WO3 composite

In the present investigation, the structural, morphological and electrochromic properties of multiwalled carbon nanotubes (MWCNT)-tungsten oxide (WO3) composites were investigated. The WO3 thin films were prepared by patented pulsed spray pyrolysis technique (PSPT) onto ITO coated glass substrates. A reticulated mesh like structure suitable for embedding is achieved by optimizing the deposition parameters. The functionalized MWCNT with 20–30 nm in diameter were embedded by drop casting/micro-injector method into the reticulated mesh-like morphology in WO3 host lattice is exploited for enhanced optical modulation. Enhancement in electrochromic properties in terms of optical modulation (ΔOD), coloration efficiency (CE) and switching times (tb and tc) was studied and reported.

► WO3 thin films by pulsed spray pyrolysis technique (PSPT) onto ITO coated glass substrates.
► Fibrous reticulated mesh-like WO3 offers excellent host material for anchoring CNTs.
► Enhancement in electrochromic properties in terms of optical modulation, coloration efficiency (CE) and switching times (tb and tc) was studied and reported.
► CNT-2 sample exhibits excellent reversibility (99%) and CE (78.6 cm2 C−1).