Ultrafast electrochromic windows based on redox-chromophore modified nanostructured semiconducting and conducting films

被引：277

作者：

Cummins, D ^{[1
]}

Boschloo, G ^{[1
]}

Ryan, M ^{[1
]}

Corr, D ^{[1
]}

Rao, SN ^{[1
]}

Fitzmaurice, D ^{[1
]}

机构：

[1] Univ Coll Dublin, Dept Chem, Dublin 4, Ireland

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 48期

关键词：

D O I：

10.1021/jp001763b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Described is the construction of an ultrafast electrochromic window. One electrode of this window is based on a transparent nanostructured TiO2 (anatase) film (4.0 mum. thick) supported on conducting glass (F-doped tin oxide, 10 Ohm cm(-2), 0.5 mum thick) and modified by chemisorption of a monolayer of the redox chromophore bis(2-phosphonoethyl)-4,4'-bipyridinium dichloride. The other electrode is based on a transparent nanostructured SnO2 film (3.0 mum thick) supported on conducting glass (F-doped tin oxide, 10 Ohm cm-2, 0.5 mum thick) and modified by chemisorption of a monolayer of the redox chromophore [beta-(10-phenothiazyl)propoxy]phosphonic acid. The electrolyte used is LiClO4 (0.2 mol dm(-3)) in gamma -butyrolactone. The excellent performance of a 2.5 cm x 2.5 cm window over 10 000 electrochromic test cycles-switching times (coloring and bleaching) of less than 250 ms, coloration efficiency of 270 cm(2) C-1, steady-state currents (colored and bleached) of less than 6 muA cm(-2), and memory of greater than 600 s (time required for low end transmittance to increase by 5%)-suggest a practical technology.

引用

页码：11449 / 11459

页数：11

共 29 条

[11] SURFACE CHELATION OF SEMICONDUCTORS AND INTERFACIAL ELECTRON-TRANSFER [J].