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학술지 Bistable Mirror/transparent Reversibly Electrodeposited Devices with TiO2 as the Mediator
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저자
한지수, 성치훈, 송주희, 아칠성, 김주연, 류호준, 황치선, 김태엽
발행일
202003
출처
Solar Energy Materials & Solar Cells, v.206, pp.1-8
ISSN
0927-0248
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.solmat.2019.110343
협약과제
19HB3300, 저저항 유연전극 기반 탈부착형 차량용 전기변색 소자 개발, 김태엽
초록
Reversible electrodeposition (RED) devices exhibit both transparent and mirror states, allowing light penetration and reflection. Therefore, the incident light transmission regulates the radiant heat generation. However, the low bistability of these devices is the main limitation to their application in windows since it causes continue energy consumption to maintain the mirror state; this is mainly due to the presence of Cu ions in the electrolyte, which is the main dissolution agent of the deposited Ag metal. Thus, we used a three-layered TiO2 counter electrode as an electrochemical reaction mediator and eliminated the Cu ions. In addition, the Ag thin film pre-deposited on the working electrode effectively enhanced the bistability. The combination of three-layered TiO2 and the pre-deposited Ag film allowed a reflectance of 78% and enhanced the mirror-state maintenance of the mirror state. After switching off the voltage, the retained reflectance was 17% at three-layered TiO2 more than twice larger than that at one-layered TiO2 (7%). The bistability and reflectance increase in the proposed RED devices with respect to those based on a Cu-containing electrolyte.
키워드
Bistability, Electrochromism, Reversible electrodeposition, Silver, Switchable mirror, TiO nanostructure 2
KSP 제안 키워드
Ag film, Ag thin film, Cu ions, Heat generation, Light penetration, Light transmission, Radiant heat, State maintenance, Switchable mirror, Working electrode, and reflection