Infiltrating semiconducting polymers into self-assembled mesoporous titania films for photovoltaic applications

Interpenetrating networks of organic and inorganic semiconductors are attractive for photovoltaic cells because electron transfer between the two semiconductors splits excitons. In this paper we show that films of titania with a uniform distribution of pore sizes can be made using a block copolymer as a structure-directing agent, and that 33% of the total volume of the film can be filled with a semiconducting polymer.