Synthesis and Physical Properties of Zinc-oxide Textured Films by Using a Filtered Preheated Hydrothermal
- Resource Type
- Article
- Authors
- Jijun Qiu; Dong-Myeong Shin; Weizhen He; 김형국; 황윤회; Xiaomin Li; Xiangdong Gao
- Source
- Journal of the Korean Physical Society, 65(9), pp.1423-1429 Nov, 2014
- Subject
- 물리학
- Language
- English
- ISSN
- 1976-8524
0374-4884
Axially (c-axis)-oriented ZnO thick films with a 8.1 μm thickness were fabricated on ZnOseed layer coated substrates by using a filtered preheated hydrothermal solution. The thick filmscomposed of single-crystal ZnO microrods with various diameters were formed by coalescing eachnanorod together along their side surfaces. From the X-ray diffraction result a biaxial stress existswas found to exist in the as-grown thick films, and the stress gradually increased with increasingannealing temperatures from 200 to 550 C due to a degradation in the crystalline quality. Thebiaxial stress is responsible for the red-shift of the optical band gap of the ZnO thick films. Photoluminescenceand Hall results revealed that the optical and the electrical properties of the thick filmswere degenerated after high-temperature annealing (> 200 C), which was due to the introductionof point defects, such as oxygen interstitials and zinc vacancies.