Journal
SUPERLATTICES AND MICROSTRUCTURES
Volume 77, Issue -, Pages 91-100Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.spmi.2014.10.036
Keywords
ZnO nanorods; C-60; Core/shell; Heterostructures; Optical; Electrical
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We report a successful synthesis of ZnO/C-60 core/shell-type organic-inorganic hybrid nanorod arrays (NRAs) using simple chemical route. X-ray diffraction pattern (XRD) reveals hexagonal crystal structure of ZnO along with the face-centered cubic (fcc) structure of C-60. Detailed Fourier transform infrared spectroscopy (FTIR) inferred the attachment of C-60 on the surface of ZnO NRAs. HRTEM observation confirmed similar to 3 nm thickness of a very thin C-60 nanocrystals shell layer formation. HRSEM image shows the existence of C-60 on vertically aligned ZnO NRAs. UV-visible absorption spectra have two absorption edges corresponding to the energy band gap values of 3.05 and 1.83 eV which arise due to core ZnO and shell C-60 respectively. Photoluminescence spectra reveal a strong enhancement in the NBE emission and suppression in the deep-level emission on the surface modified ZnO NRAs. The measured electrical resistivity under illumination for ZnO/C-60 core/shell is lower than that of bare ZnO NRAs. (C) 2014 Elsevier Ltd. All rights reserved.
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