| abstract |
Compositions suitable for manufacture of high-efficiency organic photovoltaic devices, and methods of preparing the compositions, are provided. Polythiophene-fullerene conjugates, wherein a conductive polythiophene polymer, such as a regioregular polythiophene, and a fullerene derivative, are constructed with defined spacing between the electron donor polythiophene and electron acceptor fullerene. Photovoltaic devices containing films including the inventive compositions can provide improved photoefficiencies for solar electrical generation with the flexible, relatively inexpensive, organic photovoltaic materials described herein. |