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Issue 14, 2017
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A europium ion doped WO3 film with the bi-functionality of enhanced electrochromic switching and tunable red emission

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Abstract

We first doped europium (Eu) ions into WO3 using a hydrothermal method. The effects of Eu ions on the structure, morphology, and electrochromic and photoluminescence performances of WO3 films have been systematically investigated. It is found that a WO3 film doped with Eu ions exhibits the bi-functionality of electrochromic switching and red emission. Compared with an undoped WO3 film, a WO3 film doped with 10%Eu ions shows a remarkably enhanced optical contrast of 80.7% at 680 nm, a faster coloration response of 7.2 s, and more than 3 times higher coloration efficiency of about 57.85 cm2 C−1. Moreover, a WO3 film doped with Eu ions could be excited by 260 nm ultraviolet light and exhibit a tunable red emission as a response to the applied electric field. This novel and bifunctional WO3 film shows potential in preparation of illuminable “smart windows”.

Graphical abstract: A europium ion doped WO3 film with the bi-functionality of enhanced electrochromic switching and tunable red emission

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Publication details

The article was received on 16 Jan 2017, accepted on 09 Mar 2017 and first published on 09 Mar 2017


Article type: Paper
DOI: 10.1039/C7TC00248C
Citation: J. Mater. Chem. C, 2017,5, 3488-3494
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    A europium ion doped WO3 film with the bi-functionality of enhanced electrochromic switching and tunable red emission

    G. Luo, L. Shen, J. Zheng and C. Xu, J. Mater. Chem. C, 2017, 5, 3488
    DOI: 10.1039/C7TC00248C

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