title: Toward Practical Useful Polymers for Highly Efficient Solar Cells via a Random Copolymer Approach.
abstract: Using benzo[1,2-b:4,5-b']dithiophene and two matched 5,6-difluorobenzo[2,1,3]thiadiazole-based monomers, we demonstrate that random copolymerization of two electron deficient monomers, alternating with one electron rich monomer, forms a successful approach to synthesize state-of-the-art semiconducting copolymers for organic solar cells. Over a range of compositions, these random copolymers provide impressive power conversion efficiencies (PCEs) of about 8.0%, higher than those of their binary parent polymers, and with little batch-to-batch variation. A PCE over 8% could also be achieved when the active layer was deposited from nonhalogenated solvents at room temperature.
authors: Molecular Materials and Nanosystems, Institute for Complex Molecular Systems, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
authors: Chunhui
authors: C
authors: Duan
authors: Department of Physics and Astronomy, Shanghai Jiaotong University , Shanghai 200240, China.
authors: Ke
authors: K
authors: Gao
authors: Molecular Materials and Nanosystems, Institute for Complex Molecular Systems, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands.|Dutch Polymer Institute (DPI) , P.O. Box 902, 5600 AX Eindhoven, The Netherlands.
authors: Jacobus J
authors: JJ
authors: van Franeker
authors: Department of Physics and Astronomy, Shanghai Jiaotong University , Shanghai 200240, China.
authors: Feng
authors: F
authors: Liu
authors: Molecular Materials and Nanosystems, Institute for Complex Molecular Systems, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands.|Dutch Institute for Fundamental Energy Research , De Zaale 20, 5612 AJ Eindhoven, The Netherlands.
authors: Martijn M
authors: MM
authors: Wienk
authors: Molecular Materials and Nanosystems, Institute for Complex Molecular Systems, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands.|Dutch Institute for Fundamental Energy Research , De Zaale 20, 5612 AJ Eindhoven, The Netherlands.
authors: René A J
authors: RA
authors: Janssen