Modification of single-walled carbon nanotube electrodes by layer-by-layer assembly for electrochromic devices

TR Number
Date
2008-04-01
Journal Title
Journal ISSN
Volume Title
Publisher
American Institute of Physics
Abstract

We have studied the morphological properties and electrochromic (EC) performance of polythiophene multilayer films on single wall carbon nanotube (SWCNT) conductive electrodes. The morphology for different numbers of layer-by-layer (LbL) bilayer on the SWCNT electrode has been characterized with atomic force microscopy and scanning electron microscope, and it was found that the LbL multilayers significantly decrease the surface roughness of the nanoporous nanotube films. The controlled surface roughness of transparent nanotube electrodes could be beneficial for their device applications. We have also fabricated EC devices with LbL films of poly[2-(3-thienyl) ethoxy-4-butylsulfonate/poly(allylamine hydrochloride) on SWCNT electrodes, which not only have high EC contrast but also sustain higher applied voltage without showing any degradation for more than 20 000 cycles, which is not possible in the case of indium tin oxide electrodes. Cyclic voltammetry of the LbL films formed on SWCNT shows higher current at low potential, revealing the feasibility of SWCNT electrode as a good host for electrolyte ion insertion. (C) 2008 American Institute of Physics.

Description
Keywords
Carbon nanotubes, Electrodes, Thin films, Thin film devices, Electrodeposition
Citation
Jain, Vaibhav, Yochum, Henry M., Montazami, Reza, Heflin, James R., Hu, Liangbing, Gruner, George (2008). Modification of single-walled carbon nanotube electrodes by layer-by-layer assembly for electrochromic devices. Journal of Applied Physics, 103(7). doi: 10.1063/1.2891256