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Enhancing thermoelectric properties of nanostructure Ga-doped ZnO prepared by microwave-hydrothermal synthesizing with comparing to calculation results
Author(s)
Date Issued
January 1, 2019
Type
Article
Abstract
In this work, Zn1-xGaxO, (x=0, 0.01, 0.02 and 0.03) powders were prepared using the hydrothermal method with accelerated-microwave heating system. The nanostructure Zn1-xGaxO were successfully fabricated via microwave heating method with presenting of the anisotropic hexagonal prism shape in perpendicular to c-axis and self-aggregated nano-particle. The Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) technique reveled the nanostructure particle size sample of the ZnO and the Ga-doped ZnO as in the range of 80-100 nmand 50-100 nm, respectively. The computer simulation showed the thermoelectric properties of ZnO enhancing by doping Gallium ZnO. The experimental results of thermoelectric properties for nanostructures Ga-doped ZnO nanomaterials was enhanced electrical conductivity and reduced thermal conductivity. The Seebeek value of the Ga-doped ZnO nanomaterials was difference from the ZnO-based. All ZT value of the Gadoped ZnO nanomaterials were higher than that the ZnO-based. The highest ZT value of 0.08 was obtained from2%Ga-doped ZnO at 773 K. The nanostructure of the Zn1-xGaxOnanomaterials were completely prepared by the hydrothermal-microwave heating with enhancing thermoelectric properties. The Ga-doped ZnO nanomaterials are potential materials for moderate temperature thermoelectric applications.
Citation
Materials Research Express, 6(4), 2019