Single-Crystalline Sodium-Doped p-Type ZnO and ZnMgO Nanowires via Combination of Thin-Film and Nano Techniques

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• 作者：Haiping He ; Shisheng Lin ; Guodong Yuan ; Liqiang Zhang ; Wenfeng Zhang ; Linbao Luo ; Yulin Cao ; Zhizhen Ye ; Shuit Tong Lee
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：October 6, 2011
• 年：2011
• 卷：115
• 期：39
• 页码：19018-19022
• 全文大小：867K
• 年卷期：v.115,no.39(October 6, 2011)
• ISSN：1932-7455

文摘

The p-type doping of ZnO is the key to ZnO-based light-emitting devices and has proven to be difficult. ZnO nanowires (NWs) are an ideal platform for the study of p-type doping due to their high crystal quality and easy growth. In this Article, we demonstrate an innovative approach via the combination of thin-film and nano techniques to fabricate single-crystal p-type ZnO and ZnMgO NWs. Using undoped ZnO NWs as templates, Na-doped ZnO and ZnMgO layers are deposited by pulsed laser deposition, forming core鈥搒hell NWs. Single NW field effect transistors are fabricated to testify the p-type conductivity. It is found that postannealing is crucial to activate the Na acceptor. The present method offers better controllability and reproducibility for fabricating p-type ZnO layers, which are advantageous for optoelectronic applications.