The structure and photoluminescence properties of ZnO nanobelts prepared by a thermal evaporation process

被引:30
作者
Chen, S. J. [1 ]
Wang, G. R. [1 ]
Liu, Y. C. [1 ]
机构
[1] NE Normal Univ, Ctr Adv Optoelect Funct Mat Res, Changchun 130024, Peoples R China
基金
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词
Nanomaterials; Luminescence; Exciton; ZINC-OXIDE; SOLUTION DEPOSITION; GROWTH; FABRICATION; NANORODS; POWDERS;
D O I
10.1016/j.jlumin.2008.10.018
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
ZnO nanobelts had been synthesized by a simple method of thermal evaporation of Zn powders. The morphology, structure and photoluminescence (PL) properties of ZnO nanobelts were studied. The nanobelts had a single-crystal hexagonal structure and grew along the (0001) direction with several micrometers long, 50-400 nm wide and 30-100 nm thick. Photoluminescence measurement showed that the nanobelts had an intensive near-band ultraviolet emission at about 3.3 eV. The obtained experimental data suggest that the ultraviolet PL in ZnO nanobelts originates from the recombination of the acceptor-bound excitons and free extions at room temperature. The absence of the deep level emission indicated very low impurity concentration and high crystalline quality in the ZnO nanobelts. Large-area growth and high quality indicate that the prepared ZnO nanobelts have potential application in optoelectronic devices. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:340 / 343
页数:4
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