Novel hybrid based on a poly[Ni(salen)] film and WO3 nanoparticles with electrochromic properties

The WO3@poly[1] nanocomposite showed more favourable EC properties in LiClO4/CH3CN than the pristine film. For typical coverages (Γ  = 0.06-0.10 μmol cm−2) the composite showed lower switching times (τ = 1.3 − 3.6 s), higher optical contrast (ΔT ≈ 31%, an improvement of ca. 40%) and better colouration efficiencies (in the range η = 104 − 115 cm2C−1, improvement of ca. 13 − 22%).