TY - JOUR
T1 - Sol-Gel Derived Di-Ureasil Based Ormolytes for Electrochromic Devices
AU - Nunes, Paulo Joaquim
AU - Pereira, Rui Francisco Pinto
AU - Pereira, Sónia
AU - Silva, Maria Manuela
AU - Fortunato, Elvira
AU - Bermudez, Verónica de Zea
AU - Fernandes, Mariana
N1 - Publisher Copyright:
© 2022 by the authors.
PY - 2023/1
Y1 - 2023/1
N2 - Two di-ureasils incorporating oxyethylene segments with average molecular weights Y = 600 and 900 g mol(-1), prepared by the sol-gel method, and doped with the ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) and lithium tetrafluoroborate (LiBF4) 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 x 10(-5) and 2.8 x 10(-4) S cm(-1) at room temperature and 55 degrees C, respectively. The main goal of the work was to employ the electrolytes in prototype electrochromic devices (ECDs) with the [glass/a-IZO/a-WO3/d-U(Y)LiBF4-[Bmim]Cl/c-NiO/a-IZO/glass], noted as ECD1 for Y = 600 and ECD2 for Y = 900, where a-WO3 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 (CEin = -420.621 cm(2)center dot C-1), the highest optical density value ( increment (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.
AB - Two di-ureasils incorporating oxyethylene segments with average molecular weights Y = 600 and 900 g mol(-1), prepared by the sol-gel method, and doped with the ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) and lithium tetrafluoroborate (LiBF4) 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 x 10(-5) and 2.8 x 10(-4) S cm(-1) at room temperature and 55 degrees C, respectively. The main goal of the work was to employ the electrolytes in prototype electrochromic devices (ECDs) with the [glass/a-IZO/a-WO3/d-U(Y)LiBF4-[Bmim]Cl/c-NiO/a-IZO/glass], noted as ECD1 for Y = 600 and ECD2 for Y = 900, where a-WO3 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 (CEin = -420.621 cm(2)center dot C-1), the highest optical density value ( increment (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.
KW - 1-butyl-3-methylimidazolium chloride
KW - Di-ureasil electrolytes
KW - Electrochromic devices
KW - Lithium tetrafluoroborate
KW - Sol-gel
UR - http://www.scopus.com/inward/record.url?scp=85145777156&partnerID=8YFLogxK
U2 - 10.3390/en16010426
DO - 10.3390/en16010426
M3 - Article
AN - SCOPUS:85145777156
SN - 1996-1073
VL - 16
JO - Energies
JF - Energies
IS - 1
M1 - 426
ER -