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https://hdl.handle.net/1822/84605
Título: | Sol-gel derived di-ureasil based ormolytes for electrochromic devices |
Autor(es): | Nunes, Paulo Joaquim Pereira, Rui Francisco Gonçalves Pinto Fernandes Pereira, Sónia Silva, Maria Manuela Fortunato, Elvira Zea Bermudez, Verónica de Fernandes, Mariana |
Palavras-chave: | Sol-gel Di-ureasil electrolytes Lithium tetrafluoroborate 1-butyl-3-methylimidazolium chloride Electrochromic devices |
Data: | 2023 |
Editora: | Multidisciplinary Digital Publishing Institute (MDPI) |
Revista: | Energies |
Citação: | Nunes, P.J.; Pereira, R.F.P.; Pereira, S.; Silva, M.M.; Fortunato, E.; Bermudez, V.d.Z.; Fernandes, M. Sol-Gel Derived Di-Ureasil Based Ormolytes for Electrochromic Devices. Energies 2023, 16, 426. https://doi.org/10.3390/en16010426 |
Resumo(s): | Two di-ureasils incorporating oxyethylene segments with average molecular weights Y = 600 and 900 g mol<sup>−1</sup>, prepared by the sol-gel method, and doped with the ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) and lithium tetrafluoroborate (LiBF<sub>4</sub>) salt were prepared. The as-obtained films are translucent, flexible, and hydrophobic, and have a low level of nanoscale surface roughness. The ionic conductivity values exhibited by an optimized sample are 8.10 × 10<sup>−5</sup> and 2.8 × 10<sup>−4</sup> S cm<sup>−1</sup> at room temperature and 55 °C, respectively. The main goal of the work was to employ the electrolytes in prototype electrochromic devices (ECDs) with the [glass/a-IZO/a-WO<sub>3</sub>/d-U(Y)LiBF<sub>4</sub>-[Bmim]Cl/c-NiO/a-IZO/glass], noted as ECD1 for Y = 600 and ECD2 for Y = 900, where a-WO<sub>3</sub> and c-NiO stand for amorphous tungsten oxide and crystalline nickel oxide, respectively. At 555 nm the ECD1 device exhibited the highest coloration efficiency for coloring (CE<sub>in</sub> = −420.621 cm<sup>2</sup>·C<sup>−1</sup>), the highest optical density value (∆(OD) = 0.13) and good cycling stability. In this article, the results of a preliminary evaluation of hybrid electrolytes, produced by a sol-gel process, as multi-functional components in prototype electrochromic devices are reported. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/84605 |
DOI: | 10.3390/en16010426 |
e-ISSN: | 1996-1073 |
Versão da editora: | https://www.mdpi.com/1996-1073/16/1/426 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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energies-16-00426.pdf | 3,11 MB | Adobe PDF | Ver/Abrir |
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