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Issue 1, 2016
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Inkjet-printed all solid-state electrochromic devices based on NiO/WO3 nanoparticle complementary electrodes

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Abstract

Nanostructured thin films are important in the fields of energy conversion and storage. In particular, multi-layered nanostructured films play an important role as a part of the energy system for energy saving applications in buildings. Inkjet printing is a low-cost and attractive technology for patterning and deposition of multi-layered nanostructured materials on various substrates. However, it requires the development of a suitable ink formulation with optimum viscosity, surface tension and evaporation rate for various materials. In this study, a versatile ink formulation was successfully developed to prepare NiO and WO3 nanostructured films with strong adhesion to ITO coated glass using inkjet printing for energy saving electrochromic applications. We achieved a high performance electrochromic electrode, producing porous and continuous electrochromic films without aggregation. The NiO film with 9 printed layers exhibits an optical modulation of 64.2% at 550 nm and a coloration efficiency (CE) of 136.7 cm2 C−1. An inkjet-printed complementary all solid-state device was assembled, delivering a larger optical modulation of 75.4% at 633 nm and a higher CE of 131.9 cm2 C−1 among all solid-state devices. The enhanced contrast is due to the printed NiO film that not only performs as an ion storage layer, but also as a complementary electrochromic layer.

Graphical abstract: Inkjet-printed all solid-state electrochromic devices based on NiO/WO3 nanoparticle complementary electrodes

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Publication details

The article was received on 09 Oct 2015, accepted on 13 Nov 2015 and first published on 16 Nov 2015


Article type: Paper
DOI: 10.1039/C5NR06995E
Citation: Nanoscale, 2016,8, 348-357

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    Inkjet-printed all solid-state electrochromic devices based on NiO/WO3 nanoparticle complementary electrodes

    G. Cai, P. Darmawan, M. Cui, J. Chen, X. Wang, A. L. Eh, S. Magdassi and P. S. Lee, Nanoscale, 2016, 8, 348
    DOI: 10.1039/C5NR06995E

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