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Journal Article Graphene Electrode Enabling Electrochromic Approaches for Daylight-Dimming Applications
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Authors
Joo Yeon Kim, Nam Sung Cho, Seungmin Cho, Kisoo Kim, Sanghoon Cheon, Kyuwon Kim, Seung-Youl Kang, Seong M. Cho, Jeong-Ik Lee, Ji-Young Oh, Yong-Hae Kim, Hojun Ryu, Chi-Sun Hwang, Sujung Kim, Chil Seong Ah, Tae-Youb Kim
Issue Date
2018-03
Citation
Scientific Reports, v.8, pp.1-8
ISSN
2045-2322
Publisher
Nature Publishing Group
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1038/s41598-018-22274-0
Abstract
For environmental reason, buildings increasingly install smart windows, which can dim incoming daylight based on active electrochromic devices (ECDs). In this work, multi-layered graphene (MLG) was investigated as an ECD window electrode, to minimize carbon dioxide (CO2) emissions by decreasing the electricity consumption for building space cooling and heating and as an alternative to the transparent conductor tin-doped indium oxide (ITO) in order to decrease dependence on it. Various MLG electrodes with different numbers of graphene layers were prepared with environmentally friendly poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonate) (PEDOT:PSS) to produce ECD cells. Tests demonstrated the reproducibility and uniformity in optical performance, as well as the flexibility of the ECD fabrication. With the optimized MLG electrode, the ECD cells exhibited a very fast switching response for optical changes from transparent to dark states of a few hundred msec.
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