Lu H.-CHsiao L.-YKao S.-YSeino YSantra D.CHo K.-CHiguchi M.KUO-CHUAN HO2021-08-052021-08-05202126376113https://www.scopus.com/inward/record.uri?eid=2-s2.0-85106629771&doi=10.1021%2facsaelm.1c00132&partnerID=40&md5=3887bafc50e0fd7bed318844f6be012fhttps://scholars.lib.ntu.edu.tw/handle/123456789/576750Durable electrochromic devices (ECDs) driven at 0.8 V were successfully fabricated by the complementary chromic combination of Fe(II)-based metallo-supramolecular polymer (polyFe) and Prussian blue analogues (PBAs). PolyFe was synthesized by the 1:1 complexing of Fe(OAc)2 and bis(terpyridyl)benzene and served as a cathodically coloring material. Nickel hexacyanoferrate (NiHCF) was revealed to be the best anodically coloring material among three PBAs. The complementary electrochromic (EC) pair of polyFe and NiHCF enabled a dramatic decrease of the driving voltage down to 0.8 V in the ECD. We fabricated two ECDs with liquid or solid electrolytes (L-ECD and S-ECD, respectively) and compared their EC properties. S-ECD showed a color change from blue-purple (0 V) to light yellow (0.8 V) with a transmittance change (T) of 45.1% at 580 nm; the response times were 0.52 s for coloring and 1.03 s for bleaching; the coloration efficiency reached a high value of 627.5 cm2/C. S-ECD showed better durability than L-ECD in the long term stability test up to 1 0 000 cycles. In addition, a drastic change in transmittance spectrum between 415 and 655 nm in S-ECD aligned with the highest solar irradiance in the visible region. When exposing the S-ECD to solar irradiation, it was calculated that a large solar irradiance (99.6 W/m2) can be attenuated at the colored state (0 V), and only a low power density (0.0243 W/m2) was required to keep at the bleached state (0.8 V). ? 2021 American Chemical Society.Bleaching; Cleaning; Durability; Electrochromic devices; Electrochromism; Energy utilization; Nickel compounds; Solar radiation; Solid electrolytes; Supramolecular chemistry; Coloration efficiencies; Coloring materials; Long-term stability test; Low energy consumption; Metallo-supramolecular; Nickel hexacyanoferrate; Prussian blue analogues; Transmittance spectra; Iron compounds[SDGs]SDG7Bleaching; Cleaning; Durability; Electrochromic devices; Electrochromism; Energy utilization; Nickel compounds; Solar radiation; Solid electrolytes; Supramolecular chemistry; Coloration efficiencies; Coloring materials; Long-term stability test; Low energy consumption; Metallo-supramolecular; Nickel hexacyanoferrate; Prussian blue analogues; Transmittance spectra; Iron compoundsjournal article10.1021/acsaelm.1c001322-s2.0-85106629771