Thin-film diode structures made by the sequential adsorption of redox-active polymers and semiconductor nanoparticles are explored here. In this work, TiO2 nanoparticles and graphite oxide (GO) nanoplatelets are used as electron- and hole-conducting components, respectively, and a [Ru(bpy)3]2+-containing polymer (RuP, see Figure) is used as the redox-active component. The interconnection of the RuP layers via thin GO sheets allows electroactivity to be observed at positive bias.
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Cassagneau et al. (2000) studied this question.