High throughput screening of stability and thermoelectric properties


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PDF High throughput screening of stability and thermoelectric properties

The phase stability electronic structure and transport properties of binary 3d 4d and 5d transition metal silicides are investigated using highthroughput 

  • What is the zT of thermoelectric materials?

    Thermoelectric materials generate electricity from temperature gradients.
    The dimensionless figure of merit, ZT = S2ρ1κ1T, is calculated from the Seebeck coefficient (S), electrical resistivity (ρ), and thermal conductivity (κ).

  • Although HTS offers the advantages of finding hits with activity even in the range of 30 to 1 nM, it suffers the drawback of generating many false positive hits.
    So there is a high failure rate between the number of hits and the number of authentic lead compounds.

  • What are the properties of good thermoelectric materials?

    Thus good thermoelectric materials have band gaps large enough to have only a single carrier type but small enough to sufficiently high doping and high mobility (which leads to high electrical conductivity).
    In a semiconductor at high enough temperature electrons will have enough energy to excite across the band gap.

  • How do you measure thermoelectric properties?

    The zT is difficult to directly measure in experiments, but can be calculated using measured S, σ, and κ.
    S and σ can be directly measured at both low and high temperatures.
    The κ below room temperature can also be directly measured by using instruments such as the physical property measurement system (PPMS).

  • Based on the objective relationship among the molar Gibbs free energy (Gm), the chemical potential, the Fermi level, the electronegativity (X) and the TE  Autres questions
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