The possibility of ballistic electron transport in dye-sensitized semiconductor nanocrystalline particle aggregates

摘要

A dye-sensitized photoelectrochemical cell made from a nano-porous composite film consisting of tin(IV) and zinc oxides generates exceptionally high photocurrents at an optimum mixing ratio of the two oxides. It is suggested that this phenomenon originates from ballistic transport of electrons injected by the excited dye molecules along the interconnected chains of tin(IV) oxide nanocrystallites to a zinc oxide crystallite.