Excitons and surface luminescence of CdS nanoribbons

被引：52

作者：

Ip, KM ^{[1
]}

Wang, CR ^{[1
]}

Li, Q ^{[1
]}

Hark, SK ^{[1
]}

机构：

[1] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 05期

关键词：

D O I：

10.1063/1.1644625

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The morphology and optical properties of CdS nanoribbons were studied by transmission electron microscopy and photoluminescence spectroscopy. The wurtzite-structured nanoribbons have a uniform rectangular cross section and grow along the [120] crystallographic direction. They are enclosed by small indice surfaces and have a highly perfect crystalline interior, free of extended defects. Luminescence peaks assigned to free and bound excitons were observed from these nanoribbons at low temperatures. In addition, a surface related luminescence band was also identified, showing that the proximity of unpassivated surfaces does not lead to dissociation of excitons in CdS nanoribbons of high purity and structural quality, even when their thickness is around 20 nm. (C) 2004 American Institute of Physics.

引用

页码：795 / 797

页数：3

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