In the film deposited from water on ITO, the ferrocene redox wave resembles that of other reported surface-bound ferrocene-containing polymer films, except that the film in the present study has little peak-to-peak separation and has a relatively fast electrochemical rate constant (k = 30 s -1 ) by ACV, faster than other ferrocene-containing polymers and comparable to ferrocene-bearing alkyl monolayers of only 1-2 nm in thickness. (Figure ) PPBD films deposited both from water and organic solvents should yield fully conjugated structures forming a relatively low barrier to charge carrier movement.