Electron donor-fullerene conjugated molecules for organic photovoltaic cells

摘要

A photovoltaic cell has an active area formed electron donor-fullerene conjugated molecules. The electron donor is formed of a polymer, which is conjugated with an electron acceptor, such as fullerene. By conjugating the fullerene, such as C60, with electron donor moieties, such as that of the polymer, double channels are formed therebetween, whereby one channel provides hole transport and the other channel provides electron transport. As a result, the electronic coupling between the fullerene and the electron donor moiety leads to increased short-circuit current density (Jsc) and increased open-circuit voltage (Voc), resulting in high power conversion efficacy (PCE) in the solar cell.

主权项

1. A photovoltaic cell comprising:
an at least partially light transparent electrode; an active layer disposed upon the at least partially transparent electrode, the active layer formed of a plurality of electron donor molecules, whereby at least one of the plurality of electron donor molecules is linked through conjugation with at least one fullerene molecule, so as to form a first channel of the electron donor and a second channel of the fullerene, such that holes generated in the active layer are transported by the first channel and electrons generated in the active layer are transported by the second channel; and a second electrode disposed upon the active layer, wherein the at least one electron donor molecules linked through conjugation with the at least one fullerene molecule includes the formulawhere each Ar is an electron donor molecule and Full is a fullerene molecule.