High-contrast ratio and long lifetime polymer electrochromic devices (ECDs)

Dai Ning; Chunye Xu; Lu Liu; Calen Kaneko; Minoru Taya

doi:10.1117/12.598936

6 May 2005 High-contrast ratio and long lifetime polymer electrochromic devices (ECDs)

Dai Ning, Chunye Xu, Lu Liu, Calen Kaneko, Minoru Taya

Proceedings Volume 5759, Smart Structures and Materials 2005: Electroactive Polymer Actuators and Devices (EAPAD); (2005) https://doi.org/10.1117/12.598936
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

Abstract

The preparation and characterization of a type of ECD which was based on a cathodic EC polymer film, Poly [3, 3-dimethyl-3, 4-dihydro-2H-thieno [3, 4-b][1, 4] dioxepine] (PProDOT-Me₂) is reported. A typical device was constructed by sandwiching a gel electrolyte between a PProDOT-Me₂ EC film deposited on Indium Tin oxide (ITO) coated glass and a counter electrode which was also ITO glass coated by a Vanadium oxide (V₂O₅) thin film. The ECD has been characterized. Device contrast ratio, measured as Ε%T, was equal to 60%, and ranged from 2% to 62% between the colored and bleached state measured at 580 nm. A lifetime of over 100,000 cycles between the fully oxidized and fully reduced state has been achieved with only 6% change in the transmittance. The switching speed of a 2.5cm x 2.5cm ECD could be reached in 1 second between the bleached and colored state. The device also has a long open circuit memory. It can remain in the bleached or colored state without being energized for 30 days, and the change in transmittance is less than 6% in colored state. The cyclic voltammetry method was used to detect the moisture content in the gel electrolyte. ECDs of various dimensions were also prepared, 2.5cm x 2.5cm, 7.5cm x 7.5cm, 15cm x 15cm and 30cm x 30cm. The largest scale EC polymer device achieved is 30cm x 30cm. Low sheet resistance ITO glass and a thin-film silver deposition frame were applied to overcome the electric potential drop across the ITO glass surface.

Citation Download Citation

Dai Ning, Chunye Xu, Lu Liu, Calen Kaneko, and Minoru Taya "High-contrast ratio and long lifetime polymer electrochromic devices (ECDs)", Proc. SPIE 5759, Smart Structures and Materials 2005: Electroactive Polymer Actuators and Devices (EAPAD), (6 May 2005); https://doi.org/10.1117/12.598936

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available