Improved zT in Nb₅Ge₃–GeTe thermoelectric nanocomposite

Abstract

Doping high electrical conductivity Nb5Ge3 precipitates into GeTe results in nanoprecipitates phonon scattering, while retaining electrical mobility. As a result, thermoelectric zT of GeTe is drastically enhanced to 2.0 at 723 K.

Potential of Recycled Silicon and Silicon-Based Thermoelectrics for Power Generation

“…However, the effectiveness of these strategies is limited according to the defect type and the wavelengths of phonons [18,[38][39][40][41][42]. Alternatively, other strategies, such as band structure modulation, entropy engineering, and preferential scattering of minority carriers, can be explored, which aim to improve other components of thermal conductivity as well [43][44][45][46][47][48][49][50][51][52][53]. More recently, a fresh perspective on engineering next-generation high-performance thermoelectrics has been reported, which includes low doping, in contrast to the "golden range of carrier concentration" [54,55].…”

Exploring the Impact of the HOMO–LUMO Gap on Molecular Thermoelectric Properties: A Comparative Study of Conjugated Aromatic, Quinoidal, and Donor–Acceptor Core Systems

“…These limitations have led to increased research on organic alternatives, which are more environmentally sustainable and potentially more efficient. , Improving the thermoelectric efficiency of such materials is achieved by simultaneously increasing the electrical conductance ( G ) and Seebeck coefficient ( S ) while keeping the thermal conductance low. , Given that the Seebeck coefficient relates to the gradient of the transmission curve (see eq ), one of the most effective strategies to improve molecular thermopower is to employ quantum interference (QI), i.e., introducing a sharp resonance feature − within the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) gap. However, this is often achieved using destructive QI, which results in reduced electrical conductance.…”

Suppressing Ag2Te nanoprecipitates for enhancing thermoelectric efficiency of AgSbTe2

“…To enhance the efficiency of thermoelectric materials and achieve higher zT values, various strategies including engineering scattering mechanisms, pursuing band convergence, and implementing nanostructuring techniques are employed. [7][8][9][10] Each of these approaches aims to optimize the interplay between S, σ, and κ, ultimately leading to improved thermoelectric performance. [11][12][13][14][15] Furthermore, researchers have explored a range of strategies to effectively reduce lattice thermal conductivity, including the introduction of various types of defects, the manipulation of lattice anharmonicity, the utilization of complex structures, and the application of lattice strain.…”