Co-evaporant Induced Crystalline Donor: Acceptor Blends in Organic Solar Cells

A novel method for crystallizing donor: acceptor blend films of small molecules in organic solar cells is developed. This method utilizes a liquid as a non-sticking co-evaporant during vacuum deposition. Striking enhancement in photocurrent generation is achieved in organic solar cells without exception, based on a variety of blend films produced by this method.