Probing the Carrier Dynamics of Polymer Composites with Single and Hybrid Carbon Nanotube Fillers for Improved Thermoelectric Performance

The incorporation of carbon nanotubes (CNTs) within polymer hosts offers a great platform for the development advanced thermoelectric (TE) composite materials. Over years, several CNT/polymer formulations have been investigated on an effort to maximize TE performance. Meanwhile, studies focused decay dynamics charged excitons CNTs itself and therefrom derived structures, aiming investigate lifetimes corresponding recombination processes free charge carriers. latter physical phenomena play crucial role in performance various types energy converting scavenging Nevertheless, up this date, there is no systematic study combination parameters critical carrier CNT containing composites. Herein, variety composites with single hybrid fillers based polycarbonate (PC) polyether ether ketone (PEEK) matrices were prepared by melt-mixing small scale. At same loading, addition PC results higher Seebeck coefficients similar conductivities when compared use filler systems. In contrast, systems PEEK composites, power factors could be reached than Moreover, PC-based are studied using ultrafast laser time-resolved transient absorption spectroscopy (TAS), investigation exciton origins transport films. findings reveal interesting links between obtained dynamics.