Effect of the surface-plasmon-exciton coupling and charge transfer process on the photoluminescence of metal-semiconductor nanostructures

被引：44

作者：

Yin, Jun ^{[1
]}

Yue, Chuang ^{[2
]}

Zang, Yashu ^{[2
]}

Chiu, Ching-Hsueh ^{[3
,4
]}

Li, Jinchai ^{[2
]}

Kuo, Hao-Chung ^{[3
,4
]}

Wu, Zhihao ^{[1
]}

Li, Jing ^{[2
]}

Fang, Yanyan ^{[1
]}

Chen, Changqing ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China

[2] Xiamen Univ, Pen Tung Sah Inst Micronano Sci & Technol, Dept Phys, Xiamen 361005, Peoples R China

[3] Natl Chiao Tung Univ, Dept Photon, Hsinchu 300, Taiwan

[4] Natl Chiao Tung Univ, Inst Electroopt Engn, Hsinchu 300, Taiwan

来源：

NANOSCALE | 2013年 / 5卷 / 10期

基金：

中国国家自然科学基金;

关键词：

ZNO; NANOPARTICLES;

D O I：

10.1039/c3nr00920c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effect of direct metal coating on the photoluminescence (PL) properties of ZnO nanorods (NRs) has been investigated in detail in this work. The direct coating of Ag nanoparticles (NPs) induces remarkable enhancement of the surface exciton (SX) emissions from the ZnO NRs. Meanwhile, the charge transfer process between ZnO and Ag also leads to notable increment of blue and violet emissions from Zn interstitial defects. A thin SiO2 blocking layer inserted between the ZnO and Ag has been demonstrated to be able to efficiently suppress the defect emission enhancement caused by the direct contact of metal-semiconductor, without weakening the surface-plasmon-exciton coupling effect. A theoretical model considering the type of contacts formed between metals, ZnO and blocking layer is proposed to interpret the change of the PL spectra.

引用

页码：4436 / 4442

页数：7

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