Large-Area Electrochromic Devices on Flexible Polymer Substrates with High Optical Contrast and Enhanced Cycling Stability

被引：47

作者：

Macher, Sven ^{[1
]}

Schott, Marco ^{[1
]}

Dontigny, Martin ^{[2
]}

Guerfi, Abdelbast ^{[2
]}

Zaghib, Karim ^{[2
]}

Posset, Uwe ^{[1
]}

Loebmann, Peer ^{[1
]}

机构：

[1] Fraunhofer Inst Silicate Res ISC, Neunerpl 2, D-97082 Wurzburg, Germany

[2] Hydroquebec, Ctr Excellence Transportat Electrificat & Energy, 1806 Boul Lionel Boulet, Varennes, PQ J3X 1S1, Canada

来源：

ADVANCED MATERIALS TECHNOLOGIES | 2021年 / 6卷 / 02期

关键词：

cycling stability; electrochromism; flexible electrochromic devices; PEDOT; Prussian blue; PRUSSIAN BLUE; OXIDE; EIS;

D O I：

10.1002/admt.202000836

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Large-area electrochromic devices (ECDs) based on a cathodically-coloring, side chain-modified poly(3,4-ethylene dioxythiophene) (PEDOT) derivative and anodically-coloring Prussian blue (PB) are assembled by a customized sheet-to-sheet (S2S) lamination process. The ECDs with two complementary switching "half-cells", based on flexible PET-ITO substrates, offer enhanced optical properties in terms of visible light transmission change (4-53%), contrast ratio (CR = 93.4) and color neutrality (L* = 77.9, a* = -5.9, b* = -0.6) in the bleached state. The cycling stability is monitored for up to 10 000 switching cycles (97% charge retention). The reported optical, electrochemical, and in operando (in situ) spectroelectrochemical data are obtained from small laboratory-scale ECDs (active area: 5 x 5 cm(2)). These results, the homogeneity of the large-area devices and the scalability of the S2S lamination process are confirmed by measurements on the large ECDs with an active area of 45 x 65 cm(2). This large-area electrochromic film technology with high optical contrast and enhanced cycling stability offers an excellent perspective for further development and scale-up towards pilot production and the commercialization of flexible ECDs upon their unique materials and processing characteristics.

引用

页数：9

共 36 条

[1] Innovative Combination of Three Alternating Current Relaxation Techniques: Electrical Charge, Mass, and Color Impedance Spectroscopy. Part II: Prussian Blue ⇆ Everitt's Salt Process [J].