| abstract |
The invention provides a solid-state p-n heterojunction comprising an organic p-type material in contact with an n-type material wherein said heterojunction is sensitised by at least one sensitizing agent, characterised in that the device comprises a cathode separated from said n-type material by a porous barrier layer of at least one insulating material. Also provided are optoelectronic devices such as solar cells or photo-sensors comprising such a p-n heterojunction, and methods for the manufacture of such a heterojunction or device. |