Howard, DP; Marchand, P; Gordon, T; Darr, JA; (2016) Sustainable Transparent Conducting Oxide Nanomaterials; Aluminium- and Gallium-Co-Doped Zinc Oxide (AGZO). Journal of Nanoscience and Nanotechnology , 16 (9) pp. 10166-10171. 10.1166/jnn.2016.12839.

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Abstract

Transparent conducting oxide (TCO) nanoparticles based on zinc oxide doped with aluminium and gallium (Al- and Ga-co-doped ZnO, AGZO) were synthesized using a continuous hydrothermal flow synthesis (CHFS) reactor by rapid hydrolysis and dehydration of aqueous metal salt precursors, in the presence of formic acid as an in-process reducing agent. The as-synthesised powders were characterized by powder X-ray diffraction (pXRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The as-synthesised powders were pressed into ceramic compacts and heat treated to ensure phase-pure wurtzite structure. The electrical properties of the materials were evaluated by Hall Probe measurements on the compacts, showing resistivities as low as 4�55×10−2 cm, which represents a very high conductivity for such a pressed disc based on ZnO.

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