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A Thieno[3,2‐ b ][1]benzothiophene Isoindigo Building Block for Additive‐ and Annealing‐Free High‐Performance Polymer Solar Cells
Author(s) -
Yue Wan,
Ashraf Raja Shahid,
Nielsen Christian B.,
ColladoFregoso Elisa,
Niazi Muhammad R.,
Yousaf Syeda Amber,
Kirkus Mindaugas,
Chen HungYang,
Amassian Aram,
Durrant James R.,
McCulloch Iain
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201501841
Subject(s) - benzothiophene , materials science , crystallinity , annealing (glass) , polymer solar cell , polymer , fabrication , chemical engineering , organic solar cell , solar cell , nanotechnology , organic chemistry , optoelectronics , composite material , chemistry , thiophene , engineering , medicine , alternative medicine , pathology
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.