Electric-field- and hydrogen-passivation-induced band modulations in armchair ZnO nanoribbons

Kou, Liangzhi, Li, Chun, Zhang, Zhuhua, & Guo, Wanlin (2010) Electric-field- and hydrogen-passivation-induced band modulations in armchair ZnO nanoribbons. Journal of Physical Chemistry C, 114(2), pp. 1326-1330.

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Abstract

We report on the electric-field- and H chemical-absorption-induced band manipulations of armchair ZnO nanoribbons using first-principles calculations. It is shown that the band gap of a semiconducting armchair nanoribbon can be reduced monotonically with increasing transverse field strength, demonstrating a giant Stark effect. The critical field strength to completely close the band gap decreases with increasing ribbon width, while it is almost independent of the stacking thickness. On the other hand, the nanoribbon with the edges fully passivated shows an enhanced gap but a slightly weaker Stark effect. We also observe hydrogentermination-induced metallization of the ribbons when only the edge O atoms are passivated, which results from an n-type doping effect. These findings suggest potential ways of band engineering in armchair ZnO nanoribbons.

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ID Code: 98230
Item Type: Journal Article
Refereed: Yes
DOI: 10.1021/jp909584j
ISSN: 1932-7455
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 29 Aug 2016 03:00
Last Modified: 31 Aug 2016 05:21

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