Polythiophene/poly(3,4-ethylenedioxythiophene) (PTh/PEDOT) nanocomposites with luminescent characteristics and high thermoelectric (TE) performance were successfully synthesized by two-step oxidative polymerization in aqueous medium. First, PTh nanoparticles (NPs) were synthesized by use of FeCl 3/H2O2 as catalyst/oxidant system with poly(4-styrene sulfonic acid) (PSSA) as surfactant. PTh/PEDOT nanocomposites were then synthesized by in situ oxidative polymerization of 3,4-ethylenedioxythiophene (EDOT) on the surface of PTh NPs. The composition of the nanocomposites was controlled by varying the concentration of EDOT. Electron microscopy imaging and dynamic light scattering experiments confirmed the nanocomposites had a PTh core and a PEDOT shell/matrix. Finally, the TE performance of the PTh/PEDOT nanocomposites was investigated. The electrical conductivity and power factor of the nanocomposites were found to increase from 0.0001 S/cm to 475 S/cm and from 0.001 μW/mK2 to 22.9 μW/mK2, respectively, at the optimum PEDOT concentration.
Bibliographical noteFunding Information:
This research was supported by: the Nanomate-rial Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology (MEST) (Grant Numbers 2008-2002380 and 2012-0006227); the Pioneer Research Center Program through NRF funded by the Ministry of Science, ICT and Future Planning (MSIP) (Grant Number 2010-0019550); the Priority Research Centers Program through NRF funded by MEST (Grant Number 2009-0093823); NRF funded by MSIP (Grant Number 2007-0056091); and the Converging Center Program through MEST (Grant Number 2010K001430).
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Materials Chemistry