Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 137, Issue 22, Pages 6979-6982Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b00945
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Funding
- Major State Basic Research Development Program from the Ministry of Science and Technology [2013CB933501, 2015CB856505]
- National Natural Science Foundation of China
- Beijing Natural Science Foundation [2144049]
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Three n-type polymers BDPPV, ClBDPPV, and FBDPPV which exhibit Outstanding electrical conductivities when mixed with an n-type dopant, N-DMBI ((4-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)phenyl)dimethylamine), in solution. High electron mobility and an efficient doping process endow FBDPPV with the highest electrical conductivities of 14 S cm(-1) and power factors up to 28 mu W m(-1) K-2, which is the highest thermoelectric (TE) power factor that has been reported for solution processable n-type conjugated polymers. Our investigations reveal that introduction of halogen atoms to the polymer backbones has a dramatic influence on not only the electron mobilities but also the doping levels, both of which are critical to the electrical conductivities. This work suggests the significance of rational modification of polymer structures and opens the gate for applying the rapidly developed organic semiconductors with high carrier mobilities to thermoelectric field.
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