Figure 4From: Fabrication and characterization of WO3/Ag/WO3 multilayer transparent anode with solution-processed WO3 for polymer light-emitting diodesProperties of WO 3 layer. (a) Atomic force microscope (AFM) image of solution-processed WO3 layer surface. (b) Comparison of XRD patterns of WO3 NPs synthesized from an aqueous solution of Na2WO4 and monoclinic phase of WO3. (c) Real part (n) and imaginary part (k) of complex refractive index of WO3 layer.Back to article page