Study on anomalous high p -type conductivity in ZnO films on silicon substrate prepared by ultrasonic spray pyrolysis

Jun Liang Zhao, Xiao Min Li, Andŕ Krtschil, Alois Krost, Wei Dong Yu, Yi Wen Zhang, Yan Fei Gu, Xiang Dong Gao

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

N-In codoped ZnO films were prepared by ultrasonic spray pyrolysis. Hall-effect measurements indicate that the films on silicon exhibit anomalous high p -type conductivity, while films on insulating substrates show n -type conductivity. Scanning capacitance microscopy was employed to analyze the microconductivity type of ZnO films. The grains of ZnO film on silicon show n -type conductivity and no significant p -type grains were found. The authors further investigated the microstructure of ZnO film and the band structure of the ZnOSi interface and propose a model of an interface state induced two-dimensional hole gas as the origin of the anomalous high p -type behavior.

Original languageEnglish
Article number062118
JournalApplied Physics Letters
Volume90
Issue number6
DOIs
Publication statusPublished - 2007 Feb 19

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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