Abstract
We observed the green and orange-red light emission from the single strand of doped and de-doped poly(3,4-ethylenedioxythiophene) (PEDOT) nanowires, respectively, by means of the laser confocal microscope photoluminescence (PL) experiments. Light-emitting PEDOT nanowires were electrochemically synthesized and the doping level of the systems was electrochemically controlled through cyclic voltammetry in a solution of 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6) ionic liquid. From the ultraviolet and visible absorbance spectra, we observed the bipolaron band and the π-π* transition peaks for the doped and de-doped PEDOT nanowires, respectively. The PL intensity of the de-doped PEDOT single nanowire was 2-3 times higher than that of the doped one. Comparing the PL intensities of the fresh and aged PEDOT single nanowire, we observed the relatively long-term stable light emission from the PEDOT nanowires.
Original language | English |
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Pages (from-to) | 90-94 |
Number of pages | 5 |
Journal | Synthetic Metals |
Volume | 158 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 2008 Feb |
Bibliographical note
Funding Information:The work was supported in part by the Korea Research Foundation (J03602), Hyundai-Kia Chaired Professor Fund (Korea University), and the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (No. R0A-2007-000-20053-0).
Keywords
- Confocal microscope
- Nanowire
- Photoluminescence
- Poly(3,4-ethylenedioxythiophene)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry