Luminescence of nanosized ZnO/polyaniline films prepared by self-assembly

ZnO sol was prepared and ZnO monolayer film and nanosized ZnO/polyaniline (PAN) multylayer films were coated on polished Al foil using the layer-by-layer self-assembly method. UV–vis absorbance, reflection and photoluminescence spectroscopy were obtained to investigate the luminescent properties of the samples. The ZnO sol has a single excitation peak in the UV (ultraviolet) region and a single emission peak in the green region. The excitation spectra of ZnO monolayer film and ZnO/PAN multylayer films show a continuous wide band without evident peak, and the emission spectra consist of three parts with peaks in UV, blue and green region, respectively.