Patternable PEDOT nanofilms with grid electrodes for transparent electrochromic devices targeting thermal camouflage

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This paper reports a new type of transmitting mode electrochromic device that uses the high-contrast electrochromism of poly(3,4-ethylenedioxythiophene) (PEDOT) and operates at long-wavelength infrared (8-12 mu m). To maximize the transmittance contrast and transmittance contrast ratio of the device for thermal camouflage, we control the thickness of the thin PEDOT layer from 25 nm to 400 nm and develop a design of grid-type counter electrodes. The cyclability can be greatly improved by selective deposition of the PEDOT film on grid electrodes as an ion storage layer without any loss of overall transmittance. The device with optimized architectures shows a high transmittance contrast ratio of 83 % at a wavelength of 10 mu m with a response rate under 1.4 s when alternating voltage is applied. Captured images of an LED lamp behind the device prove the possibility of active, film-type camouflage against thermal detection.
Publisher
SPRINGEROPEN
Issue Date
2015-10
Language
English
Article Type
Article
Citation

NANO CONVERGENCE, v.2, no.19, pp.1 - 7

ISSN
2196-5404
DOI
10.1186/s40580-015-0051-9
URI
http://hdl.handle.net/10203/205581
Appears in Collection
MS-Journal Papers(저널논문)
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