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Growth and optical characteristics of high-quality ZnO thin films on graphene layers
- Title
- Growth and optical characteristics of high-quality ZnO thin films on graphene layers
- Authors
- Park, Suk In; Tchoe, Youngbin; Baek, Hyeonjun; Heo, Jaehyuk; Hyun, Jerome K.; Jo, Janghyun; Kim, Miyoung; Kim, Nam-Jung; Yi, Gyu-Chul
- Ewha Authors
- 현가담
- SCOPUS Author ID
- 현가담
- Issue Date
- 2015
- Journal Title
- APL Materials
- ISSN
- 2166-532X
- Citation
- APL Materials vol. 3, no. 1
- Publisher
- AMER INST PHYSICS
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- We report the growth of high-quality, smooth, and flat ZnO thin films on graphene layers and their photoluminescence (PL) characteristics. For the growth of high-quality ZnO thin films on graphene layers, ZnO nanowalls were grown using metalorganic vapor-phase epitaxy on oxygen-plasma treated graphene layers as an intermediate layer. PL measurements were conducted at low temperatures to examine strong near-band-edge emission peaks. The full-width-at-half-maximum value of the dominant PL emission peak was as narrow as 4 meV at T = 11 K, comparable to that of the best-quality films reported previously. Furthermore, the stimulated emission of ZnO thin films on the graphene layers was observed at the low excitation energy of 180 kW/cm(2) at room temperature. Their structural and optical characteristics were investigated using X-ray diffraction, transmission electron microscopy, and PL spectroscopy. (C) 2015 Author(s).
- DOI
- 10.1063/1.4905488
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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