Luminescent Electrochromic Device Based on a Biohybrid Electrolyte Doped With a Mixture of Potassium Triflate and a Europium beta-diketonate Complex

An amorphous poly(epsilon-caprolactone) (PCL(530))/siloxane hybrid doped with potassium triflate (KCF3SO3) and Eu(btfac)(3)phen (where btfac(-) is 4,4,4-trifluoro-1-phenyl-2,4-butanedionate and phen is 1,10-phenantroline) was synthesized by the sol-gel method. This hybrid exhibits a maximum and cons...

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Detalhes bibliográficos
Autor principal: Fernandes, M. (author)
Outros Autores: Botas, A. M. P. (author), Leones, R. (author), Pereira, S. (author), Silva, M. M. (author), Ferreira, R. A. S. (author), Carlos, L. D. (author), Fortunato, E. (author), Rego, R. (author), de Zea Bermudez, V. (author)
Formato: article
Idioma:eng
Publicado em: 1000
Assuntos:
POLY(EPSILON-CAPROLACTONE)/SILOXANE
ENERGY
Texto completo:http://hdl.handle.net/10773/19453
País:Portugal
Oai:oai:ria.ua.pt:10773/19453
Descrição
Resumo:An amorphous poly(epsilon-caprolactone) (PCL(530))/siloxane hybrid doped with potassium triflate (KCF3SO3) and Eu(btfac)(3)phen (where btfac(-) is 4,4,4-trifluoro-1-phenyl-2,4-butanedionate and phen is 1,10-phenantroline) was synthesized by the sol-gel method. This hybrid exhibits a maximum and constant absolute emission quantum yield value of 0.26 +/- 0.03 under excitation within 330-360 nm. The performance of a prototype ECD based on a glass/ITO/WO3/electrolyte/NiO/ITO/glass incorporating this material is very encouraging. The device exhibited switching time around 50 s, an optical density change of 0.06, and a coloration efficiency of 23 cm(2)C(-1) in the 2nd cycle. This work demonstrates that the combined use of an ionic salt and a lanthanide complex as active species of an ECD's electrolyte offers attractive new prospects for the fabrication of light emitting electrochromic windows.

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