Published October 15, 2020 | Version v1
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Injection photodiods based on metal oxide semiconductors

  • 1. D. Ghitu Institute of Electronic Engineering and Nanotechnologies, Republic of Moldova
  • 2. National Center for Materials Study and Testing, Technical University of Moldova, Republic of Moldova


A brief review of our recent research on injection photodiodes based on metal oxide semiconductors deposited onto Si substrates is presented. A series of ZnSnO, NiO, and Zn1-xMgxO thin films are prepared by aerosol spray pyrolysis deposition or sol–gel spin coating on Si substrates with a post-deposition thermal treatment in air at a temperature of 500oC. The morphology of films is studied by scanning electron microscopy and atomic force microscopy, while their elemental composition and crystal structure are determined from energy dispersive X-ray (EDAX) and X-ray diffraction (XRD) analysis, respectively. It is shown that the produced n-ZnSnO/p-Si, n-ZnMgO/p-Si, and p-NiO/n-Si heterojunctions operate as injection photodiodes at a forward bias.



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