Determination of the structure, morphology and complex refractive index in ZnO-nanopencils/P3HT hybrid structures

► Flower-shaped ZnO-structures were synthesized via microwave hydrothermal method. ► ZnO-nanopencils were incorporated on the P3HT and blended surface. ► Formation of hexagonal and cone-like structures on the P3HT surface demonstrated an improved morphology. ► The interfacial area and charge transport improved. ► The absorption spectra, refractive index and extinction coefficient shifted to lower photon energies.