Photovoltaic device e.g. solar cell comprises nano-structured template made from first charge transfer-material, second charge-transfer material coating the wall of template elements leaving additional space and third material in the space

摘要

A photovoltaic device comprises a nano-structured template made from n-type first charge transfer-material; a p-type second charge-transfer material conformally coating at least one wall of the template elements leaving additional space; and a third material in the additional space. The third material is a p-type or conducting material that volumetrically interdigitates with the second charge-transfer material. A photovoltaic device comprises a nano-structured template made from n-type first charge transfer-material; a p-type second charge-transfer material conformally coating at least one wall of the template elements leaving additional space; and a third material in the additional space. The third material is a p-type or conducting material that volumetrically interdigitates with the second charge-transfer material. A lowest unoccupied molecular orbital (LUMO) or conduction band of the first charge-transfer material differs from a LUMTO or conduction band of the second charge-transfer material by less than 1 eV. A light absorbance of at least one charge transfer material is greater than 10 3>/cm at the peak of the absorption spectrum. The nano-structured template has template elements of 1 - 500 nm in diameter with a template element density of 10 1> 2> - 10 1> 6> elements/m 2>. An independent claim is included for making a photovoltaic device involving (a) forming a nanostructured template from a first charge-transfer material; (b) coating the walls of the template elements with a second charge-transfer material in a way that leaves additional space; and (c) filling the additional space with a third charge-transfer material that includes elongated structures that interdigitated the second charge transfer material. The second charge-transfer material has complementary charge-transfer properties with respect to the first charge-transfer material.