Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/60831
Título: | Luminescent electrochromic devices for smart windows of energy-efficient buildings |
Autor(es): | Fernandes, Mariana Freitas, Vânia Pereira, Sónia Leones, Rita Silva, Maria Manuela Carlos, Luís D. Fortunato, Elvira Ferreira, Rute A. S. Rego, Rosa Bermudez, Verónica De Zea |
Palavras-chave: | poly(epsilon-caprolatone) siloxane hybrids sol-gel lithium triflate erbium triflate erbium -diketonate complex electrochromic devices NIR-transparent IMO zero-energy buildings Poly(ε-caprolatone)/siloxane hybrids |
Data: | 17-Dez-2018 |
Editora: | Multidisciplinary Digital Publishing Institute |
Revista: | Energies |
Resumo(s): | To address the challenges of the next generation of smart windows for energy-efficient buildings, new electrochromic devices (ECDs) are introduced. These include indium molybdenum oxide (IMO), a conducting oxide transparent in the near-infrared (NIR) region, and a NIR-emitting electrolyte. The novel electrolytes are based on a sol-gel-derived di-urethane cross-linked siloxane-based host structure, including short chains of poly (ε-caprolactone) (PCL(530) (where 530 represents the average molecular weight in g mol<sup>−1</sup>). This hybrid framework was doped with a combination of either, lithium triflate (LiTrif) and erbium triflate (ErTrif<sub>3</sub>), or LiTrif and bisaquatris (thenoyltrifluoroacetonate) erbium (III) ([Er(tta)<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>]). The ECD@LiTrif-[Er(tta)<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>] device presents a typical Er<sup>3+</sup> NIR emission around 1550 nm. The figures of merit of these devices are high cycling stability, good reversibility, and unusually high coloration efficiency (CE = ΔOD/ΔQ, where Q is the inserted/de-inserted charge density). CE values of −8824/+6569 cm<sup>2</sup> C<sup>−1</sup> and −8243/+5200 cm<sup>2</sup> C<sup>−1</sup> were achieved at 555 nm on the 400th cycle, for ECD@LiTrif-ErTrif<sub>3</sub> and ECD@LiTrif-[Er(tta)<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>], respectively. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/60831 |
DOI: | 10.3390/en11123513 |
ISSN: | 1996-1073 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
energies-11-03513.pdf | 3,29 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons