Origin of Conductive Surface Layer in Annealed ZnO

Authors

David C. Look, Wright State University - Main CampusFollow
B. ClaflinFollow
Helen Smith, Wright State University - Main CampusFollow

Document Type

Article

Publication Date

2008

Abstract

The highly conductive surface layers found in nearly all as-grown or annealed bulk ZnO wafers are studied by temperature-dependent Hall-effect and secondary-ion mass spectroscopy (SIMS) measurements. In this work, we have used annealing in N₂ at 900 degrees C, and forming gas (5% H₂ in N₂) at 600 degrees C, to cause a large enough surface conduction that SIMS measurements can be reliably employed. The increased near-surface donor density, as determined from two-layer Hall-effect modeling, is consistent with an increased near-surface concentration of Al, Ga, and In atoms, resulting from diffusion. There is no evidence for participation of any donors involving H.

Comments

Copyright © 2008, American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters 92.12, and may be found at http://apl.aip.org/

Repository Citation

Look, D. C., Claflin, B., & Smith, H. (2008). Origin of Conductive Surface Layer in Annealed ZnO. Applied Physics Letters, 92 (12), 122108.
https://corescholar.libraries.wright.edu/math/17

DOI

10.1063/1.2903505