A thieno[3,2-b][1]benzothiophene isoindigo building block for additive- and annealing-free high-performance polymer solar cells.
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.
['Yue|Wan|W|', 'Ashraf|Raja Shahid|RS|', 'Nielsen|Christian B|CB|', 'Collado-Fregoso|Elisa|E|', 'Niazi|Muhammad R|MR|', 'Yousaf|Syeda Amber|SA|', 'Kirkus|Mindaugas|M|', 'Chen|Hung-Yang|HY|', 'Amassian|Aram|A|', 'Durrant|James R|JR|', 'McCulloch|Iain|I|']
thieno[3,2-b][1]benzothiophene isoindigo solar cells molecular weight additive free annealing free