ZnO nanostructures grown on ITO coated glass substrate by hybrid microwave-assisted hydrothermal method

Ana Filip, Viorica Musat, Nicolae Tigau, Silviu Polosan, Ana Pimentel, Sofia Ferreira, Daniela Gomes, Tomás Calmeiro, Rodrigo Martins, Elvira Fortunato

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Over the last decades, zinc oxide nanostructures (NSs) have been studied due to outstanding chemical and physical properties, able to serve a plethora of applications. The growth of NSs on different substrates coated with ITO film allow their direct implementation in various micro-/nano-devices. The microwave-assisted hydrothermal method is a new hybrid approach used for synthesis of oxide NSs due to unique advantages in energy efficiency/high reaction rate and possibility of obtaining different morphologies with size and shape-controlled, which are relevant for some applications. In this paper, we present a simple one step synthesis of ZnO 1D and 2D NSs with homogeneous distribution and orientation perpendicular to substrates covered with ITO film, using a microwave-assisted hydrothermal method. The effect of seed layer treatment on the structure, morphology and optical properties of the obtained NSs have been investigated by X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), UV/VIS/NIR and photoluminescence spectroscopy. The obtained ZnO NSs with 1D and 2D morphologies show high visible transmittance between 80–90 % and band gap energy values between 3.27 and 3.22 eV. The I-V curves and photoluminescence spectra indicate good ohmic contacts on both sides (ITO and Au-top electrodes) and highlight the effect of the thermal treatment of seed layer on the photoluminescence emission and electrical conductivity of the obtained NSs.

Original languageEnglish
Article number164372
JournalOptik
Volume208
DOIs
Publication statusPublished - Apr 2020

Keywords

  • Electrical properties
  • ITO coated glass substrate
  • MW-assisted hydrothermal
  • Optical properties
  • ZnO nanostructures

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