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.
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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|Item Type:||Journal Article|
|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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