Photoluminescence properties: Catalyst-free ZnO nanorods and layers versus bulk ZnO

被引：27
|
作者：
Al-Suleiman, M. [1 ]
Mofor, A. Che [1 ]
El-Shaer, A. [1 ]
Bakin, A. [1 ]
Wehmann, H. -H. [1 ]
Waag, A. [1 ]
机构：
[1] Tech Univ Braunschweig, Inst Semicond Technol, D-38106 Braunschweig, Germany
来源：
APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 23期
关键词：
D O I：
10.1063/1.2399349
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this contribution, we compare the photoluminescence properties of ZnO nanorods and epilayers with those of bulk ZnO. Owing to the high aspect ratio (length of 4-14 mu m, diameter of 80-500 nm), the characterized ZnO nanorods show very good optical properties. Due to the high surface-to-volume ratio in ZnO nanorods, surface excitons dominate at low temperature. The optical properties of nanorod ensembles improve with increasing nanorod length. The photoluminescence emission from free A excitons was intense in the ZnO layer at 13 K. (c) 2006 American Institute of Physics.
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页数：3
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