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Energy saving electrochromic windows were achieved by controlling the interfacial charge transfer using low-HOMO level ( E HOMO < −5 eV) π-conjugated polymers (CPs) as bistable electrochromic films and an ionic liquid as the electrolyte layer. It provided a long bistability (>90 min) at the voltage-off state with a high coloration efficiency (879 cm ² C ⁻¹ ).
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Shin et al. (2015) studied this question.
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