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Electrochromic windows based on luminescent acrylate/ionosilicas
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Resumo(s)
Poly(methyl methacrylate) (PMMA)-based composite films doped with lanthanide-doped sol–gel derived imidazolium-based ionosilicas (IS-Ln) were recently proposed as active layers of luminescent down shifting (LDS) layers, but subsequent work demonstrated also their potential as electrolytes for electrochromic devices (ECDs) with foreseen application in smart windows of energy-efficient buildings. Nevertheless, some challenges remained to be addressed in the latter devices, the most critical one being the poor solubility of PMMA in the ionic liquid used in the formulation of these materials. To avoid this drawback, in the present work we propose novel lanthanide-containing acrylate/ionosilicas (AC/IS-Ln, Ln = Tb3+, Eu3+). The transparent, homogeneous, and luminescent hybrid materials synthesized are characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, atomic force microscopy, contact angle measurements, ionic conductivity, and photoluminescence spectroscopy. Optimized samples are successfully employed as electrolytes in luminescent ECD prototypes. The ECD device doped with AC/IS-Eu shows good cycling stability with reproducible bleaching/coloring over 50 chronoamperometry cycles, high coloration efficiency (CE) values CEin/CEout in the visible (−89/+98 cm2 C−1), and near-infrared (−126/138 cm2 C−1) spectral regions, and outstanding memory effect. Graphical Abstract: (Figure presented.)
Descrição
This work was funded by project I&D&I OBTain, operation no. NORTE-01-0145-FEDER-000084, co-financed by the European Regional Development Fund (FEDER) thought NORTE 2020 (Northern Regional Operational Programme 2014/2020), CENTRO2020 in the scope of the project PLANETa, CENTRO-01-0247-FEDER-181242, SOLPOWINS-Solar-Powered Smart Windows for Sustainable Buildings (PTDC/CTM/4304/2020). DP acknowledges OBTain for post-doc grant BIPD/UTAD/19/2021. RFPP acknowledges FCT-UMinho for the contract in the scope of Decreto-Lei 57/2016 57/2017.
Publisher Copyright:
© The Author(s) 2024.
Palavras-chave
Electrochromic smart windows Luminescent acrylate/ionosilicas Sol–gel Visible and NIR emitting electrolytes Electronic, Optical and Magnetic Materials Ceramics and Composites General Chemistry Biomaterials Condensed Matter Physics Materials Chemistry SDG 7 - Affordable and Clean Energy