Abstract
A self-standing all-in-one electrochromic gel utilizing phenyl viologen (PV) and N,N,N′,N′-tetramethyl-1,4-phenylenediamine (TMPD) as the electrochromic materials is prepared by incorporating a thermo-cured cross-linked polymer matrix. The thermal-cured polymer matrix can prevent the agglomeration of PV happening on the electrode surface, resulting in the excellent write–erase ability of the obtained gelated ECD. Moreover, the cross-linker which possesses the long propoxylated arms leads to the easier diffusion for both PV and TMPD in the obtained polymer network. As a result, the obtained ECD exhibits a large transmittance change (ΔT>67% at 620nm) within a short response time (<3.5s) under an extremely low driving voltage (0.5V). Besides, this device remains over 55% of ΔT after 10,000 cycles of switching.
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