Formation of interface defects of ZnO/ZnS core-shell nanowires and its optical properties investigations

被引：0

作者：

Zhao H.-X. ^{[1
]}

Fang X. ^{[1
]}

Wang Y.-B. ^{[1
]}

Fang D. ^{[1
]}

Li Y.-F. ^{[2
]}

Wang D.-K. ^{[1
]}

Wang X.-H. ^{[1
]}

Chu X.-Y. ^{[1
,4
]}

Zhang X.-D. ^{[3
]}

Wei Z.-P. ^{[1
]}

机构：

[1] State Key Laboratory of High Power Semiconductor Laser, Changchun University of Science and Technology, Changchun

[2] College of Physics, Jilin University, Changchun

[3] Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO), Chinese Academy of Sciences, Suzhou

[4] Key Laboratory for Photonic and Electric Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin

来源：

Chinese Optics | 2019年 / 12卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Core-shell nanostructures; Interface defects; Localized states; Photoluminescence;

D O I：

10.3788/CO.20191204.0872

中图分类号：

学科分类号：

摘要：

ZnO/ZnS core-shell nanostructures have great application prospects in optoelectronic area due to their excellent optoelectronic properties. They rely mainly on the binding effect of carriers at the interface of the core-shell structure to more effectively control carrier generation, transmission and recombination processing. In order to discuss the interfacial state of ZnO/ZnS core-shell structure and its corresponding optical properties, ZnO/ZnS core-shell nanowires with different amounts of sulfur powder vulcanization were grown and then characterized using scanning electron microscopy(SEM), transmission electron microscopy(TEM), Photoluminescence spectroscopy(PL). Analysis and discussion were conducted for the structure and optical properties of the ZnO/ZnS core-shell nanowire interface after sulfurization with different amounts of sulfur powder. By analyzing the morphology of the ZnO/ZnS core-shell structure, it was found that ZnS successfully coated ZnO nanowires and with the increase of vulcanization degree, the ZnO core structure was destroyed and defects were introduced at the core-shell interface, resulting in forming ZnO/ZnS core-shell structure with different crystal qualities. The structure affects the optical properties of ZnO/ZnS core-shell nanowires. The results show that when few defects appear at the interface of the ZnO/ZnS core shell, they have a binding effect on the generation and transport of carriers, thus inhibiting the non-radiative composite effect and improving the optical properties of the material. When the interface defects increase, the formed defect energy level reduces the optical properties of the material. © 2019, China Science Publishing & Media LTD. All right reserved.

引用

页码：872 / 879

页数：7

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