Fullerene surfactants and their use in polymer solar cells

摘要

Fullerene surfactant compounds useful as interfacial layer in polymer solar cells to enhance solar cell efficiency. Polymer solar cell including a fullerene surfactant-containing interfacial layer intermediate cathode and active layer.

主权项

1. A fullerene compound, comprising:
(a) a fullerene group; (b) one or more cationic nitrogen centers covalently coupled to the fullerene group; (c) one or more hydrophilic groups covalently coupled to the fullerene group; and (d) one or more counter ions associated with the cationic nitrogen center, wherein the compound has the structure: wherein F is a fullerene group; B is a N-containing ring having from 5-7 ring atoms; R1 and R2 are independently selected from the group consisting of a polyalkylene oxide and a C1-C20 alkyl optionally substituted with an anionic center; Ar is —C6H5-PEO, wherein —C6H5-PEO is selected from the group consisting of mono-, di-, tri-, and tetra-PEO substituted phenyl, and wherein PEO is a polyethylene oxide; and A− is a counter ion associated with the cationic nitrogen center.