Abstract
Hexagonal-phase indium tin oxide nanoparticle (h-ITO NP) is a high-temperature and high-pressure phase, and its preparation is more difficult than the cubic one. In this work, low-resistivity and single hexagonal-phase ITO NPs were synthesized through a binary solvothermal method of deionized water (DI water) and glycerol (GL) at relatively mild conditions combined with post-heat treatment. The effects of experimental parameters such as the volume ratios of DI water and GL, reaction time and temperature on the phase, morphology as well as electrical resistivity of h-ITO NPs were explored systematically. The results showed that the reaction time can be as short as 30 min when the single hexagonal-phase ITO NPs were synthesized at 200 °C. And the h-ITO NPs can also be synthesized when the temperature was as low as 110 °C by an 8-h reaction. The lowest resistivity of 1.258 Ω cm can be reached when the volume ratio of DI water to GL was 1:1, the reaction temperature and time were 200 °C and 8 h, respectively. Moreover, the mechanism of the influence of experimental conditions on the resistivity of ITO NPs was also analyzed.
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This work was financially supported by Beijing Natural Science Foundation (No. 2192041).
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JL conceived and designed the experiments; YM and XZ performed the experiments and analyzed the experimental data; YM, XZ and JL offered helpful discussion in the study and co-wrote the paper.
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Ma, Y., Zhai, X. & Liu, J. Synthesis of hexagonal-phase indium tin oxide nanoparticles by deionized water and glycerol binary solvothermal method and their resistivity. J Mater Sci 55, 3860–3870 (2020). https://doi.org/10.1007/s10853-019-04227-8
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DOI: https://doi.org/10.1007/s10853-019-04227-8