Well-defined donor-acceptor rod-coil diblock copolymer based on P3HT containing C60
AssigneeThe Regents of the University of California
InventorsChangduk Yang, Fred Wudl
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Abstract
A method for the synthesis of well-defined rod-coil block copolymers consisting of P3HT donor and C60 acceptor chromophores (P3HT-b-P(SxAy)-C60) in a molecular architecture is reported for use in bulk-heterojunction (BHJ) solar cells. In thin films of the resulting block copolymer, reproducible self-assembly into well-defined “nanofibrils” is observed. This is the first example of a block copolymer containing a C60 derivative that shows exclusively a nanofibrilar structure. A substantial improvement in device performance is achieved when the block copolymer is used as a “surfactant” for controlling the interface morphology of the P3HT:PCBM donor-acceptor phase domains within the composite.
Claims13
An organic photovoltaic device comprising a compound comprising P3HT, PCBM, and P3HT-b-P(SxAy)-C60, wherein S is styrene and A is acrylate, x is the mol ratio of S and y is the mol ratio of A.
The device of clam 1, wherein the device is a bulk-heterojunction solar cell.
A compound comprising P3HT, PCBM, and P3HT-b-P(SxAy)-C60, wherein S is styrene and A is acrylate, x is the mol ratio of S and y is the mol ratio of A.
A diblock copolymer comprising the formula of P3HT-b-P(SxAy)-C60, wherein S is styrene and A is acrylate, x is the mol ratio of S in the copolymer and y is the mol ratio of A in the copolymer, whereby the diblock is sufficiently soluble to be cast as a thin film.
A method for the synthesis of P3HT-b-P(SxAy)-C60 diblock comprising:
- undergoing a living polymerization reaction and
- performing cycloaddition reactions.
Dependencies are inferred from the claim text.