Conductivity study of nitrogen-doped calcium zinc oxide prepared by spray pyrolysis

Yu Ting Hsu, Wen How Lan*, Kai-Feng Huang, Jia Ching Lin, Kuo Jen Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In this study, the spray pyrolysis method was used to prepare unintentionally doped and nitrogen-doped calcium zinc oxide films by using zinc acetate, calcium nitrate precursor, and ammonium acetate precursor. Morphological and structural analyses were conducted using scanning electron microscopy and X-ray diffraction. The results indicated that film grain size decreased as the nitrogen doping was increased. Both calcium oxide and zinc oxide structures were identified in the unintentionally doped calcium zinc oxide. When nitrogen doping was introduced, the film mainly exhibited a zinc oxide structure with preferred (002) and (101) orientations. The concentration and mobility were investigated using a Hall measurement system. P-type films with a mobility and concentration of 10.6 cm2 V-1 s-1 and 2.8×1017 cm-3, respectively, were obtained. Moreover, according to a temperature-dependent conductivity analysis, an acceptor state with activation energy 0.266 eV dominated the p-type conduction for the unintentionally doped calcium zinc oxide. By contrast, a grain boundary with a barrier height of 0.274-0.292 eV dominated the hole conduction for the nitrogen-doped calcium zinc oxide films.

Original languageEnglish
Pages (from-to)63-66
Number of pages4
JournalPhysica B: Condensed Matter
Volume481
DOIs
StatePublished - 15 Jan 2016

Keywords

  • Calcium zinc oxide
  • Electrical properties
  • Nanocrystalline materials
  • Spray pyrolysis
  • Thin films

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