Optical and Excitonic Properties of Crystalline ZnS Nanowires: Toward Efficient Ultraviolet Emission at Room Temperature

被引：114

作者：

Chen, Rui ^{[1
]}

Li, Dehui ^{[1
]}

Liu, Bo ^{[1
]}

Peng, Zeping ^{[1
]}

Gurzadyan, Gagik G. ^{[1
]}

Xiong, Qihua ^{[1
,2
]}

Sun, Handong ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Math & Phys Sci, Div Phys & Appl Phys, Singapore 637371, Singapore

[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Div Microelect, Singapore 639798, Singapore

来源：

NANO LETTERS | 2010年 / 10卷 / 12期

关键词：

Nanowire; ZnS; photoluminescence; exciton; PHOTOLUMINESCENCE PROPERTIES; RAMAN-SCATTERING; GROWTH; GAP; LUMINESCENCE; DEPENDENCE; CONSTANTS; SPECTRA; ENERGY;

D O I：

10.1021/nl102987z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A systematic investigation into the excitonic properties of wurtzite ZnS nanowires (NVs) is presented Under optical excitation the ZnS NWs exhibit Strong ultraviolet (UV) emission Optical transition from free exciton A fide exciton-B and shallow level emission are observed and analyzed through power-dependent and temperature dependent photoluminescence spectroscopy measurements performed from 10 to 300 K The excitonic transition and coupling strength of exciton longitudinal optical phonon were directly determined from the evolution of exciton peak energy and peak width broadening Our studies indicate that free excitons in ZnS nanowires are very stable suggesting a great promise for high efficiency light emitting devices and lasers In the UV region Finally, the carrier dynamics of the ZnS NWs were measured and analyzed for the first time by ultrafast spectroscopy

引用

页码：4956 / 4961

页数：6

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