Influence of Annealing Temperature on Structural and Optical Properties of Undoped and Al-Doped Nano-ZnO Films Prepared by Sol–Gel Method
- Title
- Influence of Annealing Temperature on Structural and Optical Properties of Undoped and Al-Doped Nano-ZnO Films Prepared by Sol–Gel Method
- Author
- 안진호
- Keywords
- ZnO; Al-Doped ZnO; Sol-Gel Method; Annealing Effect; Structural Property; Optical Property
- Issue Date
- 2016-04
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Citation
- SCIENCE OF ADVANCED MATERIALS, v. 8, NO 4, Page. 878-883
- Abstract
- Undoped and Al-doped nano-ZnO thin films are grown on sapphire substrates by a sol gel method. Their structural, morphological, and optical properties have been investigated with respect to post -annealing temperatures of 500 degrees C and 700 degrees C. The undoped and Al-doped nano-ZnO films exhibit a dominant (002) XRD peak. By increasing the annealing temperature of ZnO from 500 degrees C to 700 degrees C, the homogeneously distributed granular nano-grains with 20-40 nm diameter are changed into faceted grains with 30-80 nm. The photoluminescence spectra show strong emission peak around 3.26 eV indicating a direct band gap recombination. ascribed to free exiton emission. The Raman spectra exhibit a strong A(1) (LO) peak and its shift with increasing annealing temperature due to strain of undoped and Al-doped ZnO thin films concurs with the broadening of XRD peak.
- URI
- http://www.ingentaconnect.com/content/asp/sam/2016/00000008/00000004/art00028;jsessionid=nk7a0qanu51b.x-ic-live-03http://hdl.handle.net/20.500.11754/50302
- ISSN
- 1947-2935; 1947-2943
- DOI
- 10.1166/sam.2016.2548
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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