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Doping and de-doping of carbon nanotube transparent conducting films by dispersant and chemical treatment

Authors
Geng, Hong-ZhangKim, Ki KangSong, ChulhoXuyen, Nguyen ThiKim, Soo MinPark, Kyung AhLee, Dae SikAn, Kay HyeokLee, Young SilChang, YoungkyuLee, Young JunChoi, Jae YoungBenayad, AnassLee, Young Hee
Issue Date
Feb-2008
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY, v.18, no.11, pp 1261 - 1266
Pages
6
Journal Title
JOURNAL OF MATERIALS CHEMISTRY
Volume
18
Number
11
Start Page
1261
End Page
1266
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/159400
DOI
10.1039/b717387c
ISSN
0959-9428
1364-5501
Abstract
Single-walled carbon nanotubes (SWCNTs) dispersed with Nafion in a solvent mixture containing de-ionized water and 1-propanol (bisolvent) were sprayed on a poly(ethylene terephthalate) substrate to fabricate flexible transparent conducting films (TCFs). Different SWCNT-to-Nafion ratios were used to optimize the film performance of transparence and sheet resistance. The TCFs were then immersed in nitric acid. These steps resulted in p-type doping due to the presence of Nafion in the SWCNT network and de-doping (removal of doping effect) by the acid treatment. X-Ray photoelectron and Raman spectroscopy confirmed that the de-doping effect occurred with the partial removal of Nafion from the nanotube surface by the nitric acid treatment, which improved the film conductivity by a factor of similar to 4 with negligible change in transmittance.
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