Luminescence properties of tetrapod ZnO nanostructures

作者：Wang Fuxue^*; Cai Xiaolong; Yan Dawei; Zhu Zhaomin; Gu Xiaofeng

来源：Chinese Journal of Semiconductors, 2014, 35(6): 063004.

DOI：10.1088/1674-4926/35/6/063004

• Cathodoluminescence spectra
• Chemical vapor deposition methods
• Free-exciton emissions
• Luminescence properties
• Photoluminescence measurements
• Single-crystalline wurtzite
• tetrapod
• ZnO

The tetrapod ZnO nanostructures are synthesized on the Si (100) substrates using the chemical vapor deposition (CVD) method at 1000°C. Each nanostructure has four arms which are about 3-10 μm in length and 0.2-1.5 μm in diameter. Further analyses on structure demonstrate that the tetrapod ZnO nanostructures have single crystalline wurtzite hexagonal structure preferentially oriented in c-axis. The photoluminescence (PL) measurements of the tetrapod ZnO nanostructures revealed a UV peak at 382 nm corresponding to the free exciton emission, and a green peak at 523 nm arising from deep level emission. For comparative analysis, cathodoluminescence (CL) spectra obtained from different regions of an individual tetrapod are investigated. Moreover, a possible growth mechanism of the tetrapod ZnO nanostructures is also discussed based on the experimental results.

• 出版日期2014
• 单位江南大学