Surface electronic structure of nitrogen-doped semiconducting single-walled carbon nanotube networks
- Authors
- Park, Young Ran; Ko, Min Jae; Song, Yoon-Ho; Lee, Cheol Jin
- Issue Date
- 21-10월-2013
- Publisher
- AMER INST PHYSICS
- Citation
- JOURNAL OF APPLIED PHYSICS, v.114, no.15
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF APPLIED PHYSICS
- Volume
- 114
- Number
- 15
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/101853
- DOI
- 10.1063/1.4826206
- ISSN
- 0021-8979
- Abstract
- We investigated the effects of vacuum annealing on the surface electronic structure and the work function of single-walled carbon nanotubes (SWCNTs). We changed the doping type of semiconducting single-walled carbon nanotubes (semi-SWCNTs) from p-type to n-type, and investigated their optical properties. The HNO3 treated p-type SWCNT network was converted to n-type after vacuum annealing due to formation of C-N bond. The C 1s sp(2) binding energy of the vacuum annealed semi-SWCNTs was shifted toward a higher binding energy about 0.42 eV, which indicates a raising Fermi level as much as 0.42 eV compared with the intrinsic semi-SWCNTs. In addition, the work function of the vacuum annealed semi-SWCNT was observed towards lower energies. It is considered that the C-N bonding of semi-SWCNTs creates a donor level near the bottom of the conduction band, thus raising the Fermi level. The ultraviolet photoelectron spectroscopy and X-ray photoelectron spectroscopy revealed that the increased binding energy of C 1s sp(2) and the decreased work function of semi-SWCNTs are caused by n-type doping after vacuum annealing. (C) 2013 AIP Publishing LLC.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.