Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 2, Issue 28, Pages 5651-5659Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4tc00738g
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Funding
- NSFC [51173206, 21161160443]
- National High-Technology Research and Development Program [2011AA050523]
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A new alkylthienyl substituted thieno[2,3-f] benzofuran (TBF)-based polymer (PTBFTDTBT) was synthesized and characterized. PTBFTDTBT had a high molecular weight, good solubility in common organic solvents, broad visible absorption from 300 to 750 nm, and a relatively deep highest occupied molecular orbital level (-5.2 eV). PTBFTDTBT also showed a field hole mobility up to the order of 10(-2) using an organic field effect transistor (OFET) method and an order of 10(-2) using a space-charge-limited current (SCLC) method. With the structure of indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene): polystyrene sulfonate/PTBFTDTBT:PC71BM (1 : 2, w/w)/Ca/Al, a power conversion efficiency of 6.42% was obtained with a high short circuit current (J(sc)) of 13.51 mA cm(-2) and fill factor (FF) of 61%, under the illumination of AM1.5G, at 100 mW cm(-2), without any post-treatment. The study demonstrates that TBF is a promising building block for organic electronics.
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