Fabrication of a solution-processed IGZO/NiO p-n diode

Document Type : Article

Authors

1 Shahid Beheshti University of Medical Sciences, Velenjak, Tehran, Iran

2 Islamic Azad University Science and Research Branch, Hesarak, Tehran, Iran

Abstract

The fabrication of a p-n diode is investigated using a fully solution-processed method. Indium gallium zinc oxide (IGZO) ink was synthesized and deposited on a quartz substrate and annealed to form a thin film serving as an n-type semiconductor. A facile sol-gel method was used to deposit a lithium doped nickel oxide thin film (Li:NiO) as a p-type semiconductor. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to characterize the structural properties of Li:NiO and IGZO films. XRD analysis revealed a polycrystalline bunsenite structure in the Li:NiO films. Nanocrystalline grains were also observed on the surface morphology of the Li:NiO films. The XRD analysis indicated that the IGZO films were amorphous. However, SEM images demonstrate a variety of nanostructures in these films, including hexagons. The Li:NiO molar ratio was optimized to minimize series resistance of the diode. NiO had a carrier density of 7.8E13 cm-3 and mobility of 0.8 cm2/V.s, the highest mobility ever reported in a NiO film to our knowledge. The carrier density of IGZO was 2.5E16 cm-3, and its mobility was 0.95 cm2/V.s. The fabricated diode exhibited a current ratio of 175 in on and off states and a reverse breakdown voltage of 3.5 V.

Keywords

Main Subjects

References

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Scientia Iranica
Volume 31, Issue 21
Transactions on Computer Science & Engineering and Electrical Engineering (D)
November and December 2024
Pages 1963-1970

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History

  • Receive Date: 08 December 2020
  • Revise Date: 27 February 2022
  • Accept Date: 28 June 2023

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