Decoupling effect of electrical and thermal properties of Bi2Te3-polypyrrole hybrid material causing remarkable enhancement in thermoelectric performance

Effects of the Interface between Inorganic and Organic Components in a Bi2Te3–Polypyrrole Bulk Composite on Its Thermoelectric Performance

“…Bi 2 Te 3 –polypyrrole exhibited basically lower carrier concentration and mobility than pristine Bi 2 Te 3 ( Table S3 ), and thus the former displayed higher electrical resistivity than the latter. In our previous work, we suggested the equilibrium band alignment with band-bending potential wells in the interface of Bi 2 Te 3 and polypyrrole by using their energy band structures [ 22 ]. Because of the band bending, the accumulation of electrons and holes possibly occurs at the interfaces, thereby causing the carrier offsetting, which explains the decrease in the carrier concentration in Bi 2 Te 3 –polypyrrole.…”

“…Sample preparations were performed through our procedures described elsewhere [ 22 ]. Bi 2 Te 3 powder was prepared by a conventional pulverization method.…”

Super-high carrier mobilities and excellent thermoelectric performances of Tri–Tri group-VA monolayers

“…To achieve high thermoelectric performance, ongoing efforts in thermoelectric research are focused on improving the power factor S 2 s and reducing the lattice thermal conductivity via molecular design, phononic and electronic transport decoupling, and producing hybrid composites incorporating highly thermoelectric particles. [3][4][5][6] Generally, it is difficult to significantly improve the thermoelectric performance of bulk materials as their three main parameters (S, s, and k) are mutually binding. In the case of two-dimensional (2D) materials, however, their strong quantum confinement effect 7 has great potential to break those complex relationships.…”

Enhancing Seebeck coefficient and electrical conductivity of polyaniline/carbon nanotube–coated thermoelectric fabric

“…Manufacturing nanocomposites is a simple and promising method to optimize the conflicting thermoelectric parameters in order to enhance the transport features in thermoelectric materials by applying multi-improved phonon-scattering models. [20][21][22][23][24][25] The Seebeck coefficient has been enhanced in many nanocomposites due to the energyfiltering effect, but at the cost of significant drop in their electrical conductivity due to excessive high-energy barriers. Therefore, optimizing energy barriers should be seriously considered in manufacturing nanocomposites.…”