Flexible electrochromic devices prepared on ultra-thin ITO glass

Schott, Marco; Niklaus, Lukas; Müller, Christoph Michael; Bozkaya, Begüm; Giffin, Guinevere A.

doi:10.1039/d1ma00376c

Cited by 7 publications

(1 citation statement)

References 35 publications

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“…The use of ultrathin glass as the substrate for electrochromic application has been recently investigated by Schott et al and was the only reported example to date. [59] Unlike ITO on polymer substrates, which would usually give very different properties than its glass counterpart, ultrathin ITO glass offer a new possibility to directly transfer the electrochromic performance from a rigid device to a flexible one. To demonstrate the compatibility of the ultrathin glass with the ionogel, a curved eyes protector has been fabricated as shown in Figure 5a,b which exhibited essentially similar spectroelectrochemical performance as the rigid P-WO 3 device (Figure S19, Supporting Information).…”

Section: Flexible Electrochromic Eye Protector and Displaysmentioning

confidence: 99%

Rapidly Photocurable Solid‐State Poly(ionic liquid) Ionogels For Thermally Robust and Flexible Electrochromic Devices

Poh

et al. 2022

Advanced Materials

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Formation of ionogels through in situ polymerization can effectively improve electrolyte processability; however, the curing process has been slow and oxygen‐sensitive. Considering the low oxygen solubility of poly(ionic liquid)s (PILs), in situ polymerized ionogels are designed to realize excellent electrolytes. Herein, two in situ polymerized ionogels (PIL A & PIL B) are formulated, and they can be rapidly photocured within a minute. The ionogels are highly transparent, stretchable, and exhibit excellent physicochemical stability, including thermal, electrochemical, and air stability, allowing them to perform in various conditions. Benefitting from these properties, two high‐performance electrochromic devices (ECDs) are assembled, with iron‐centered coordination polymer (FeCP) and tungsten oxide (P‐WO3) electrochromic materials, achieving high color contrast (45.2% and 56.4%), fast response time (1.5/1.9 and 1.7/6.4 s), and excellent cycling endurance (>90% retention over 3000 cycles). Attributed to the thermal robustness of the ionogels, the ECDs can also be operated over a wide temperature range (−20 to 100 °C). With the use of deformable substrates (e.g., ultrathin ITO glass), curved electrochromic eye protector and flexible electrochromic displays are realized, highlighting their potential use in futuristic wearables.

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Section: Flexible Electrochromic Eye Protector and Displaysmentioning

confidence: 99%