NDLI: Growth behaviors and characteristics of low temperature spin-sprayed ZnO and Al-doped ZnO microstructures

Content Provider	Springer Nature Link
Author	Obi, Ogheneyunume Zhou, Ziyao Beghun, Shawn Nan, Tianxiang Stoute, Stephen Liu, Ming Lou, Jing Yang, Xi Gao, Yuan Li, Ming Xing, Xing Sun, Nian X. Warzywoda, Juliusz Sacco, Albert Guo, Ting Nan, Cewen
Copyright Year	2013
Abstract	The influence of growth parameters of the spin-spray technique upon the microstructure and electrical and optical properties of ZnO and Al-doped ZnO microstructures was investigated. This investigation was carried out by varying the pH and concentration of the solutions utilized. With increasing pH from 9 to 12, the ZnO films changed from membrane-like microstructures at a pH of 9 to single crystal ZnO rods with hexagonal ends at the pH of 10, and to polycrystal ZnO needle-like tips with random crystalline orientation at the pH of 12. Varying the concentration of the solution brought about a dramatic change in the crystal growth behavior and crystalline orientation, with the least concentration producing rods more uniform and oriented in the c-axis direction. The optical absorption dependence of the ZnO microstructures was also studied by ultraviolet visible spectrophotometer. This investigation will enable optimized low temperature (<100 °C) fabrication of ZnO films by the spin-spray technique with controllable microstructure and properties based on their processing conditions. Furthermore, the influence of Al doping on the electric property, optical property microstructures of the Al-doped ZnO thin films was examined. Increase in Al concentration from 0 to 2 % further reduced the resistivity of the ZnO films by 3 orders of magnitudes from 3.4 × 10$^{4}$ to 14 Ω cm; while the Hall mobility increases from 1 to 140 cm$^{2}$/V s at the same time. The optical photoluminescence measurement of Al-doped ZnO thin films in ultra violet (UV) was also demonstrated.
Starting Page	2058
Ending Page	2066
Page Count	9
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	24
Issue Number	6
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2013-01-09
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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