In:
Applied Physics Letters, AIP Publishing, Vol. 88, No. 9 ( 2006-02-27)
Abstract:
To improve the dynamic response of a solid-state electrochromic (EC) device, a new concept has been introduced into the EC operation. The device is composed of an indium tin oxide-coated glass substrate, a thin amorphous WO3 film, a thin SiO2 film, a thin amorphous Ta2O5 film, and a semitransparent top contact. The EC coloration and bleaching are measured by transient evolution in the optical transmittance under a positive or negative bias voltage Vb. The experimental results show that the response time at which the transmittance becomes 70% of the initial value reaches 100ms at Vb=3V. From voltammometric analyses, it is suggested that the inserted thin SiO2 film acts as a barrier for holes and electrons against diffusion or leakage, and that both the production rate of protons at the SiO2∕Ta2O5 interface and their subsequent intercalation into the WO3 film are significantly accelerated. This approach is promising for the development of practical solid-state inorganic thin-film EC devices, such as a smart window and paperlike passive display.
Type of Medium:
Online Resource
ISSN:
0003-6951
,
1077-3118
Language:
English
Publisher:
AIP Publishing
Publication Date:
2006
detail.hit.zdb_id:
211245-0
detail.hit.zdb_id:
1469436-0
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