Luminescent Electrochromic Devices for Smart Windows of Energy-Efficient Buildings

Mariana Fernandes, Vânia Freitas, Sónia Pereira, Rita Leones, Maria Manuela Silva, Luís D. Carlos, Elvira Fortunato, Rute A. S. Ferreira, Rosa Rego and Verónica De Zea Bermudez
Additional contact information
Mariana Fernandes: Department of Chemistry and CQ-VR, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
Vânia Freitas: Department of Physics and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
Sónia Pereira: CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
Rita Leones: Department of Chemistry, University of Minho, Gualtar, 4710-057 Braga, Portugal
Maria Manuela Silva: Department of Chemistry, University of Minho, Gualtar, 4710-057 Braga, Portugal
Luís D. Carlos: Department of Physics and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
Elvira Fortunato: CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal
Rute A. S. Ferreira: Department of Physics and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
Rosa Rego: Department of Chemistry and CQ-VR, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
Verónica De Zea Bermudez: Department of Chemistry and CQ-VR, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal

Energies, 2018, vol. 11, issue 12, 1-13

Abstract: 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 −1 ). This hybrid framework was doped with a combination of either, lithium triflate (LiTrif) and erbium triflate (ErTrif 3 ), or LiTrif and bisaquatris (thenoyltrifluoroacetonate) erbium (III) ([Er(tta) 3 (H 2 O) 2 ]). The ECD@LiTrif-[Er(tta) 3 (H 2 O) 2 ] device presents a typical Er 3+ 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 2 C −1 and −8243/+5200 cm 2 C −1 were achieved at 555 nm on the 400th cycle, for ECD@LiTrif-ErTrif 3 and ECD@LiTrif-[Er(tta) 3 (H 2 O) 2 ], respectively.

Keywords: poly(?-caprolatone)/siloxane hybrids; sol–gel; lithium triflate; erbium triflate; erbium ?-diketonate complex; electrochromic devices; NIR-transparent IMO; zero-energy buildings (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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