Structural Design of Porphyrins for Binary and Ternary Organic Solar Cells with High Efficiency and Low Energy Loss

Abstract

Porphyrin-based molecules have been explored for a long time as the active materials in dye-sensitized solar cells achieving efficiencies as high as 13%. Nevertheless, until the last few years, this family of molecules has been scarcely explored as donor materials in bulk heterojunction (BHJ) organic solar cells (OSCs).Believing that porphyrin-based molecules should play a more important role in BHJ OSCs we started a few years ago a project in this field using a careful structural optimization. Here I´ll present our last results in this field using porphyrin-based molecules in binary and ternary OSCs, reaching efficiencies close to 10% with low energy loss.