• Title
    [International Journal] Development of defects in ZnO/RGO composites under wet chemical synthesis
  • Journal
    Optik
  • Authors
    Han Gil Na, Taek-Kyun Jung, Min Ryou, Ji-Woon Lee, Soong-Keun Hyun, Sung Yong Kang, Ali Mirzaei, Maryam Bonyani, Kyung-Taek Kim, Ho-Joon Choi, Hyoun Woo Kim*, Changhyun Jin*
  • Date
    December, 2017
  • Citation Index
    비 SCI
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  • 운영자
  • 0
  • 114
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  • 글주소
  • 02-20
55ACF0191217B0FAEB84843C6135501D_1.jpg

Keywords: Defects, Growth from solutions, Nanomaterials, Semiconducting materials


Abstract

ZnO/reduced graphene oxide (RGO) heterostructures were fabricated using a simple
two-step wet chemical technique and post-annealing treatment. ZnO nanoparticles with
different sizes (20–200 nm) and shapes were randomly distributed on mono- and/or multilayered
RGO sheets. The microstructures of the ZnO/RGO composites examined using
transmission electron microscopy indicated that the heterostructures are polycrystalline
in nature, implying the possibilities of diverse defects present in the samples. The photoluminescence
spectra examinations revealed the enhancement of defect-level emission
peaks observed at a relatively long wavelength ranges (i.e., 779 nm, 666 nm, and 574 nm) as
compared with the band to band transition observed at relatively short wavelengths (i.e.,378 nm).