Ambipolar behaviors of hydrogen-incorporated ZnO nanowires
Ambipolar behaviors of zinc oxide nanowires (ZnO NWs) are obtained for the first time by controlled annealing in hydrogen ambient. Optimum annealing can create p-type acceptors into ZnO NWs while maintaining the n-type donors from the as-grown samples. We found that such optimum condition must be one that is more than sufficient to eliminate the green photoluminescence (PL) band of the as-grown ZnO NWs. All of these can be explained by an ab initio model of Zn vacancy-hydrogen complexes, which can served as the donor, acceptor, or green PL quencher depending on the number of hydrogen atoms involved.
The Journal of Physical Chemistry C
Prasad, A., Pandey, A., Kunapuli, V., Bergstrom, P. L., & Yap, Y. K. (2012). Ambipolar behaviors of hydrogen-incorporated ZnO nanowires. The Journal of Physical Chemistry C, 116 (14). http://dx.doi.org/10.1021/jp3003118