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- W3010192937 abstract "We present a new strategy for improving the electrochromic properties of single-layered ion gels for electrochromic devices (ECDs) by incorporating octa-hexyl viologen substituted polyhedral oligomeric silsesquioxane (OHV-POSS). Newly synthesized OHV-POSS was included in ion gel compositions containing a poly(vinylidene fluoride) copolymer and ionic liquid to produce a freestanding film. When applied in single-layered ECDs, due to high ionic conductivity and fast charge transfer, the OHV-POSS film exhibited outstanding electrochromic performances with low redox potentials at −1.1 V, high transmittance changes (ΔT) of 56.1%, and a moderate coloration efficiency (CE) of 124.1 cm2/C. When combined with isooctyl polyhedral oligomeric silsesquioxane (IO-POSS), the device performances were remarkably enhanced, exhibiting a ΔT of 67.2% and CE of up to 307.8 cm2/C. In addition, the fabricated device maintained its switching stability for up to >12,000 cycles with a switching speed of 8.6 s. The electrochromic improvement is attributed to the presence of a POSS (Si-O-Si) cross-linkable cage structure featuring robust mechanical properties. In addition, flexible ECDs were fabricated on silver nanowire-PEDOT:PSS composite electrodes, and superb electrochromic performances were achieved with repeated bending cycles (>200 cycles). This study’s results present a promising tool for the material design of high-performance stable ECDs for long-term operation in displays, eyewear, and transmissive windows." @default.
- W3010192937 created "2020-03-13" @default.
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- W3010192937 date "2020-08-01" @default.
- W3010192937 modified "2023-10-11" @default.
- W3010192937 title "Octa-viologen substituted polyhedral oligomeric silsesquioxane exhibiting outstanding electrochromic performances" @default.
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- W3010192937 doi "https://doi.org/10.1016/j.cej.2020.124690" @default.
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