Photocurrents at polmeric triads: sensitized redox cascades under forward and reverse bias
Abstract
The anodic photocurrents at the ‘isomeric’ redox-polymer trilayer-film assemblies, {electrode(–0.2 V)/redox1(–0.42 V)/redox2(–0.64 V)/sensitizer(–0.81 V)} and {electrode(–0.2 V)/redox2(–0.64 V)/redox1(–0.42 V)/sensitizer(–0.81 V)}(redox1,2= polymeric diquat homologues, sensitizer = polymeric Ru(bpy)3-derivative), are mainly governed by the sequence of redox1 and redox2, i.e. the forward or reverse bias of the intrinsic redox-type diode.