Structural and optical properties of nitrogen-ion-implanted ZnO nanorods
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- Title
- Structural and optical properties of nitrogen-ion-implanted ZnO nanorods
- Authors
- Park, SH; Lee, YB; Kwak, CH; Seo, SY; Kim, SH; Choi, YD; Han, SW
- Date Issued
- 2008-03
- Publisher
- KOREAN PHYSICAL SOC
- Abstract
- We present a study of the structural and the optical properties of nitrogen-ion-implanted ZnO nanorods. Vertically-aligned ZnO nanorods were synthesized on Al2O3 substrates by using a catalyst-free metal-organic chemical vapor deposition (MOCVD) procedure. Nitrogen ions with an energy of 120 keV and an ion flux of 1 x 10(16) particles/cm(2) were implanted on the vertically-aligned ZnO nanorods. The structural properties were studied by using various techniques, including field emission transmission electron microscopy (FE-TEM), X-ray diffraction (XRD), and X-ray absorption fine structure (XAFS) analyses. The XRD measurements revealed that the crystalline properties of the nitrogen-ion-implanted ZnO nanorods were comparable with those of the as-grown ZnO nanorods. However, the XAFS analysis demonstrated that the bonding lengths of atomic pairs on the c-axis were slightly elongated and that the ion implantation caused an extra structural disorder of Zn-O pairs. The FE-TEM revealed that the nanorods had structurally-damaged spots along the entire length of the nanorods. nom the photoluminescence (PL) spectra, we observed a considerably weak main donor-acceptor transition peak at 3.02 eV in the temperature range of 5-300 K. The blue shift and the intensity decrease of the main transition peak strongly suggest that the implanted nitrogen ions play a role in the optical property changes of the nanorods.
- Keywords
- ZnO; nanorod; hole-doping; structure; ion implantation; ABSORPTION FINE-STRUCTURE; SENSING CHARACTERISTICS; ARRAYS; ELECTROLUMINESCENCE; TEMPERATURE; TRANSISTORS; NANOWIRES; GROWTH
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29339
- DOI
- 10.3938/jkps.52.954
- ISSN
- 0374-4884
- Article Type
- Article
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 52, no. 3, page. 954 - 959, 2008-03
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