Enhanced dual-band modulation of visible and near-infrared light transmittance in electrochromic composite films based on Preyssler-type polyoxometalates and W₁₈O₄₉

Abstract

The W18O49/[PEI/P5W30]20 film modulated for visible and near infrared light was prepared by layer by layer method on FTO glass substrate, and had significant coloration efficiency (149.78 cm2·C−1), fast response...

Toward Next‐Generation Smart Windows: An In‐depth Analysis of Dual‐Band Electrochromic Materials and Devices

“…For instance, WO 3 's optical modulation properties can be coupled with the structural stability of TiO 2 for improved performance. [72,73,78,181,182] A variety of these multicomponent materials, including inorganic@inorganic composites [68,[71][72][73]78,181] and inorganic@organic composites, [33,74,75] have emerged in recent years.…”

“…In recent years, polyoxometalates (POMs) and W 18 O 49 had been widely studied because they could undergo reversible and stepwise multielectron transfer reactions and exhibit different colors after accepting electrons. [71,72] Compared to NbO x and ITO NCs, POMs and W 18 O 49 have larger optical modulation in the VIS and NIR regions, respectively. Therefore, by combining the two and optimizing the synthesis process, POMs@W 18 O 49 is expected to demonstrate cheaper preparation cost and superior dual-band electrochromic performance than ITO NCs@NbO x .…”

“…This integration successfully enabled the independent modulation of "bright," "cool," and "dark" modes via voltage control, thereby substantiating the potential of dual-band composite constructions. [69] To date, a myriad of composites, encompassing inorganic@inorganic [71][72][73] and inorganic@organic combinations, [33,74,75] have been adeptly tailored to yield dual-band responses. Consequently, the judicious selection of components and the intricate design of structures have ascended as focal points of contemporary research.…”

Bifuntional Materials Containing Preyssler‐type Polyoxometalates and Iron Phenanthroline Stabilized with Poly (Allylamine Hydrochloride) for Electrochromic Energy Storage Devices

“…[12,13] Zhang et al [14] proposed the preparation of amorphous isopolytungstate (IPT) films, which displayed enhanced transmittance modulation, coloration efficiency and stability compared with the crystalline IPT film. Yang et al [15] successfully assembled the W 18 O 49 /[PEI/ P 5 W 30 ] 20 thin film into an electrochromic device that can achieve color reversible conversion at small voltages. In addition, the polyoxometalates has been an ideal electrode materials for energy storage applications due to unique electrochemical redox behavior and high stability in their oxidized and reduced states.…”