Vertically Aligned CdSe and Zn-doped CdSe Nanorod Arrays Grown Directly on FTO Coated Glass: Synthesis and Characterization

Abstract

Vertically aligned nanorod arrays of CdSe and Zn doped CdSe films were grown on FTO coated glass substrate by using cathodic electro deposition method. The composition, crystal structure, surface morphology and optical properties of the as-grown pure CdSe and Zn doped CdSe nanotubular films were examined by using energy dispersive spectroscopy, x-ray diffractometer, field emission scanning electron microscope, UV-Vis-IR spectrophotometer and photoluminescence techniques, respectively. XRD study showed the hexagonal crystal structure without any precipitates related to Zn. SEM images clearly showed end capped vertically aligned nanorods arranged closely. The optical transmittance spectra were recorded within the range of 300-1000 nm. The band gap energy was found to vary between 1.94 and 1.98 eV due to the incorporation of Zn. PL spectra showed a narrow near band gap emission at 1.81 and 1.94 eV for CdSe and Zn doped CdSe nanorod arrays.