The effects of thermal annealing in NH3 -ambient on the p-type ZnO films

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Abstract

Thermal annealing in NH3-ambient was carried out to form p-type ZnO films. The properties were examined by X-ray diffraction (XRD), Hall-effect measurement, photoluminescence (PL), and secondary ion mass spectrometry (SIMS). Electron concentrations in ZnO films were in the range of 1015-1017/cm3 with thermal annealing in NH3-ambient. The activation thermal annealing process was needed at 800 {ring operator}C under N2-ambient to obtain p-type ZnO. The electrical properties of the p-type ZnO showed a hole concentration of 1.06×1016/cm3, a mobility of 15.8 cm2/V s, and a resistivity of 40.18 Ω cm. The N-doped ZnO films showed a strong photoluminescence peak at 3.306 eV at 13 K, which is closely related to neutral acceptor bound excitons of the p-type ZnO. The incorporation of nitrogen was confirmed in the SIMS spectra.

Original languageEnglish
Pages (from-to)62-67
Number of pages6
JournalSuperlattices and Microstructures
Volume42
Issue number1-6
DOIs
StatePublished - Jul 2007

Keywords

  • Annealing
  • NH
  • p-type doping
  • ZnO

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