Organic photovoltaic devices comprising fullerenes and derivatives thereof
AssigneesPlextronics, Inc., Nano-C, Inc.
InventorsDarin W. LAIRD, Reza STEGAMAT, Henning RICHTER, Viktor VEJINS, Lawrence T. SCOTT, Thomas A. LADA, II
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Abstract
Photovoltaic cells comprising an active layer comprising, as p-type material, conjugated polymers such as polythiophene and regioregular polythiophene, and as n-type material at least one fullerene derivative. The fullerene derivative can be C60, C70, or C84. The fullerene also can be functionalized with indene groups. Improved efficiency can be achieved.
Claims21
1-75. (canceled)
A composition comprising at least one p-type material and at least one n-type material, wherein the n-type material comprises a fullerene derivative represented by:
- F*-(R)n
- and solvates, salts, and mixtures thereof,
- wherein n is at least 1,
- F* comprises a fullerene having a surface which comprises six-membered and five-membered rings;
- and
- R is optionally substituted o-quinodimethane which is covalently bonded to the fullerene by two bonds.
Dependencies are inferred from the claim text.