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Issue 40, 2018
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Controllable and large-scale fabrication of flexible ITO-free electrochromic devices by crackle pattern technology

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Abstract

Electrochromic devices (ECDs) presenting reversible color variation are considered as the most promising alternative to traditional smart windows. However, the fabrication of large-scale ECDs with high flexibility and stability is still challenging. In this work, we present a crackle pattern technology for controllable and large-scale fabrication of rectangular Ag network films for indium tin oxide-free (ITO-free) flexible ECDs. This rectangular Ag film exhibits superior mechanical robustness and controllable optoelectronic performance (2.0 Ω sq−1 at 91% transmittance). In the application of WO3 based ECD, the rectangular film presents an ultrafast switching time (0.25/0.18 s for bleaching/coloring) and is thus applicable in flexible displays. Moreover, this device demonstrates a large optical modulation of 76% at 630 nm and sustains 78.9% of its initial modulation even after 20 000 cycles, which is close to the commercial standard for rigid ECDs. The obtained rectangular Ag films are successfully assembled into a flexible all-solid-state ECD (21 × 13 cm2), which can be utilized in smart windows, glasses and other fields that require bending or cutting.

Graphical abstract: Controllable and large-scale fabrication of flexible ITO-free electrochromic devices by crackle pattern technology

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Publication details

The article was received on 24 Jul 2018, accepted on 21 Sep 2018 and first published on 21 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07154C
Citation: J. Mater. Chem. A, 2018,6, 19584-19589
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    Controllable and large-scale fabrication of flexible ITO-free electrochromic devices by crackle pattern technology

    Z. Xu, W. Li, J. Huang, Q. Liu, X. Guo, W. Guo and X. Liu, J. Mater. Chem. A, 2018, 6, 19584
    DOI: 10.1039/C8TA07154C

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