
164 Semiconductor Device-Based Sensors for Gas, Chemical, and Biomedical Applications
© 2011 by Taylor & Francis Group, LLC
5.8 PROPERTIES OF HYDROGEN IN ZnO
There is particular interest in the properties of hydrogen in ZnO, because of the predictions from
density functional theory and total energy calculations that it should be a shallow donor.
28,30,109,110
The generally observed n-type conductivity, therefore, may at least in theory be explained by the
presence of residual hydrogen from the growth ambient, rather than to native defects such as Zn
interstitials or O vacancies. There is some experimental support for the predicted observations ...