Stabilization of the surface of ZnO films and elimination of the aging effect

Khabibulla A. Abdullin*, Maratbek T. Gabdullin, Sultan K. Zhumagulov , Guzal A. Ismailova , Lesya V. Gritsenko , Yevgeniya Y. Kedruk, Mojtaba Mirzaeian

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Downloads (Pure)

Abstract

Zinc oxide is a promising multifunctional material. The practical use of nano- and polycrystalline ZnO devices faces a serious problem of instability of electrical and luminescent characteristics, due to the adsorption of oxygen by the surface during aging. In this paper, the aging effect in ZnO films and nanorod arrays was studied. It was found that ZnO samples demonstrate different behavior of the degradation process, which corresponds to at least two different types of adsorbing surface sites for O2, where O2 adsorption is of a different nature. The first type of surface sites is rapidly depassivated after hydrogen passivation and the aging effect takes place due to these centers. The second type of surface sites has a stable structure after hydrogen passivation and corresponds to HO–ZnO sites. The XPS components of these sites include the Zn2p3/2 peak at 1022.2 ± 0.2 eV and Zn2p1/2 peak at 1045.2 ± 0.2 eV, with a part of the XPS O1s peak at 531.5 ± 0.3 eV. The annealing transforms the first type of site into the second one, and the subsequent short-term plasma treatment in hydrogen results in steady passivation, where the degradation of characteristics is practically reduced to zero.
Original languageEnglish
Article number6535
Number of pages14
JournalMaterials
Volume14
Issue number21
DOIs
Publication statusPublished - 30 Oct 2021

Keywords

  • ZnO
  • chemical bath deposition
  • hydrogen plasma treatment
  • aging effect
  • surface stabilization

Fingerprint

Dive into the research topics of 'Stabilization of the surface of ZnO films and elimination of the aging effect'. Together they form a unique fingerprint.

Cite this