Neutral-state black diketopyrrolopyrrole (DPP)-based conjugated polymers with the colour channels a*from -3 to 0 and b* from -2 to -7 are achieved by incorporating an additional donor segment - dialkoxythiophene (DalkOT), which leads to the enhancement in blue-wavelength absorption. The polymers display black-to-transmissive grey electrochromic switching with good redox stability.
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