Temperature-dependent properties of nearly ideal ZnO schottky diodes

Martin W. Allen, Xiaojun Weng, Joan M. Redwing, Karthik Sarpatwari, Suzanne E. Mohney, Holger von Wenckstern, Marius Grundmann, Steven M. Durbin

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


The current-voltage characteristics of low-idealityfactor (1.09 at 300 K) ZnO Schottky diodes were investigated over the temperature range of 40-423 K. Planar geometry devices were fabricated on the Zn-polar face of a low carrier concentration (n = 1 × 1014 cm-3 hydrothermally grown bulk ZnO single crystal wafer. The current transport was dominated by thermionic emission between 293 and 423 K, provided the ZnO surface was exposed to air. The nearly ideal characteristics of the diodes yielded an experimental Richardson constant of 10 ± 6 A 6 · cm-2 · K-2, close to the theoretical value of 32 A · cm-2 · K-2, and two orders of magnitude larger than previously reported values.

Original languageEnglish (US)
Pages (from-to)2160-2164
Number of pages5
JournalIEEE Transactions on Electron Devices
Issue number9
StatePublished - 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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