Mechanism of Na-doped p-type ZnO films: Suppressing Na interstitials by codoping with H and Na of appropriate concentrations

被引：42
作者：
Lin, S. S. [1 ]
He, H. P. [1 ]
Lu, Y. F. [1 ]
Ye, Z. Z. [1 ]
机构：
[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 09期
基金：
中国国家自然科学基金;
关键词：
ROOM-TEMPERATURE; ACCEPTOR; LITHIUM; DONOR; EMISSION;
D O I：
10.1063/1.3254221
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Hydrogen is codoped with sodium into ZnO films. X-ray photoelectron spectroscopy and secondary ion mass spectroscope indicate that the Na concentration decreases as the substrate temperature increases. Hall-effect tests reveal a transition from n-type to p-type conduction when the growth temperature increases, which is explained by the suppression of Na interstitials by codoping with H and Na of appropriate concentrations. An insulating intended Na-H codoped sample shows reduced resistivity and p-type conductivity after annealing at 550 degrees C, which may be due to dissociation of Na-Zn-H complexes. The realization of p-type ZnO by Na-H codoping may explain the discrepancies in behavior of Na in ZnO and suggests the potential of Na-H codoping method [E.-C. Lee and K. J. Chang. Phys. Rev. B 70, 115210 (2004)]. (D 2009 American Institute of Physics. [doi: 10.1063/1.3254221]
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页数：5
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