Surface Passivation Effect on the Photoluminescence of ZnO Nanorods

被引：99

作者：

Chen, Cong ^{[1
]}

He, Haiping ^{[1
]}

Lu, Yangfan ^{[1
]}

Wu, Kewei ^{[1
]}

Ye, Zhizhen ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 13期

基金：

国家教育部博士点专项基金资助;

关键词：

ZnO nanorods; Al2O3; coating; hydrogen plasma; photoluminescence; surface passivation; LUMINESCENCE;

D O I：

10.1021/am401418b

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report an investigation of the impact of surface passivation on the optical properties of ZnO nanorods. Al2O3 coating and hydrogen plasma treatment were used to passivate the surface states. It was found that Al2O3 coating led to the suppression of the deep level emissions, while hydrogen plasma treatment completely quenched the deep level emissions. It was confirmed that the surface states of the as-grown ZnO nanorod arrays indeed contributed to the deep level emissions. Evidence was also provided that shows surface, states have a greater impact on the green emission than the orange emission and may cause the negative thermal quenching behavior. Moreover, the passivation effect was confirmed by the changes of the O 1s and Zn 2p spectra.

引用

页码：6354 / 6359

页数：6

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