Abstract
Doping plays a crucial role in tuning charge transport of organic thermoelectric (TE) materials. A typical n-type organic semiconductors, perylene diimmide (PDI), was used as a dopant to improve the TE performance of PEDOT:PSS films. At 10 wt% PDI content, the electrical conductivity (1500 S cm−1) and Seebeck coefficient (36.7 μV K−1) of PEDOT:PSS/PDI films were improved by 20% and 109%, respectively. The doping may arise from the interaction between the lone-pair electrons of nitrogen in PDI and the polarons of PEDOT. This work offers a new though for developing new dopant to tune TE performance of conducting polymers.
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