title: A thieno[3,2-b][1]benzothiophene isoindigo building block for additive- and annealing-free high-performance polymer solar cells.
abstract: A novel photoactive polymer with two different molecular weights is reported, based on a new building block: thieno[3,2-b][1]benzothiophene isoindigo. Due to the improved crystallinity, optimal blend morphology, and higher charge mobility, solar-cell devices of the high-molecular-weight polymer exhibit a superior performance, affording efficiencies of 9.1% without the need for additives, annealing, or additional extraction layers during device fabrication.
authors.affiliation: Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Wan
authors.initials: W
authors.lastname: Yue
authors.affiliation: Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Raja Shahid
authors.initials: RS
authors.lastname: Ashraf
authors.affiliation: Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Christian B
authors.initials: CB
authors.lastname: Nielsen
authors.affiliation: Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Elisa
authors.initials: E
authors.lastname: Collado-Fregoso
authors.affiliation: Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Muhammad R
authors.initials: MR
authors.lastname: Niazi
authors.affiliation: Department of Physics, Government College University, Lahore, 54000, Pakistan.
authors.forename: Syeda Amber
authors.initials: SA
authors.lastname: Yousaf
authors.affiliation: Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Mindaugas
authors.initials: M
authors.lastname: Kirkus
authors.affiliation: Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Hung-Yang
authors.initials: HY
authors.lastname: Chen
authors.affiliation: Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Aram
authors.initials: A
authors.lastname: Amassian
authors.affiliation: Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
authors.forename: James R
authors.initials: JR
authors.lastname: Durrant
authors.affiliation: Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.|Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Iain
authors.initials: I
authors.lastname: McCulloch
keywords: additive free; annealing free; molecular weight; solar cells; thieno[3,2-b][1]benzothiophene isoindigo