Thickness-dependent growth orientation of F-doped ZnO films formed by atomic layer deposition

Kyung Mun Kang, Yong June Choi, Geun Young Yeom, Hyung Ho Park

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

ZnO thin films were doped with fluorine using atomic layer deposition (ALD) with an in-house F source at a deposition temperature of 140 °C. Structural and morphological properties of the resulting F-doped ZnO (ZnO:F) films were investigated by x-ray diffraction analysis, field emission scanning electron microscopy, and grazing incidence wide-angle x-ray diffraction. During the initial growth stage of up to 200 ALD cycles, no difference was observed between the preferred growth orientations of undoped ZnO and ZnO:F films. However, after 300 ALD cycles, ZnO and ZnO:F films showed (002) and (100) preferred orientation, respectively. This difference in preferred growth orientation arose from the perturbation-and-passivation effect of F doping, which involves F anions filling the oxygen-related defect sites in the ZnO lattice. Ultraviolet photoelectron spectroscopic analyses were carried out to investigate the surface plane dependency of the films' work functions, which confirmed that the ZnO and ZnO:F films had different growth behaviors.

Original languageEnglish
Article number01A144
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume34
Issue number1
DOIs
Publication statusPublished - 2016 Jan 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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