Assessing the potential of Mg-doped Cr₂O₃ as a novel p-type transparent conducting oxide

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Aoife B KehoeGraeme W Watson

Abstract

One of the current challenges faced by material scientists is the development of a p-type transparent conducting oxide with levels of optical transparency and electronic conductivity to equal those of the universally n-type industry leaders such as Sn-doped In2O3. The discovery of a p-type analogue would allow for the combination of both polarities into a heterojunction, accessing the potential for transparent electronics. In this study, an insulating material, Cr2O3, is investigated both experimentally and computationally to determine if it is a viable p-type host matrix as has been recently proposed in the literature. The geometric and electronic structure are examined by high resolution x-ray diffraction, x-ray photoelectron spectroscopy, and periodic density functional theory (specifically, PBE  +  U). By incorporating Mg and performing a comprehensive defect analysis, the dominant intrinsic and extrinsic carriers in the material are determined, and it is shown that Cr2O3 has the potential to display p-type conductivity when appropriately doped.

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Citations

Oct 28, 2020·ACS Applied Materials & Interfaces·Andrea CrovettoPeter C K Vesborg
Jul 12, 2019··A. K. YadavAshok Bhakar

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