VIS–IR Bilateral Modulation of All‐Solid‐State Electrochromic Devices Based on Two Principles: Localized Surface Plasmon Resonance and Ions‐Electrons Dual Circulation

Abstract The based on WO 3 electrochromic devices (ECDs) is developing, but it remains a challenge to design all‐solid‐state ECDs that cover the VIS–IR spectrum with high stability, fast switching rate, and a wide tunable emissivity range. It is important to design ECD that synergistically modulates the smart thermodynamic cover in a wide spectral range. Here, the bilateral modulation process provides a new strategy for the design and fabrication of VIS–IR ECDs. The bilateral modulation of all‐solid‐state ECD with an ITO/Ti‐doped ITO/LiNbO 3 /NiO x /ITO‐glass structure that has a low energy consumption (± 1.5 V) is reported. Its modulation is based on the localized surface plasmon resonance (LSPR) and the traditional electrochromic processes. IR is regulated on the Ti‐doped ITO, VIS is regulated on the NiO x . The Δ ε of the ECD in the range of 1.25–2.5, 3–5, 8–14, 2.5–25, 14–25, and 1.25–28.6 µm are 0.50, 0.51, 0.48, 0.35, 0.33, and 0.32, respectively, and Δ T is 18.9% at 489 nm. It has a fast switching time of 0.5 and 2.7 s, and a cycling life of 10 4 cycles in IR. It also highlights the potential of combining two modulation principles in one ECD to achieve dual‐band modulation of VIS–IR under the same processing voltage.