The best thermoelectric
The best thermoelectric
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DOI：
10.1073/pnas.93.15.7436
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发表时间：
1996-07-23
影响因子：
11.1
通讯作者：
Sofo, JO
中科院分区：
文献类型：
--
作者：
Mahan, GD;Sofo, JO
什么样的电子结构能为热电材料提供最大的品质因数？为了回答这个问题，我们将电导率、热电势和热导率写为单个函数（输运分布）的积分，然后我们推导出输运分布的数学函数，该函数给出最大的优值，发现三角形输运分布使热电性能最大化，这一结果表明，要使热电效率达到最大，参与输运过程的电子能量分布必须很窄。
What electronic structure provides the largest figure of merit for thermoelectric materials? To answer that question, we write the electrical conductivity, thermopower, and thermal conductivity as integrals of a single function, the transport distribution, Then we derive the mathematical function for the transport distribution, which gives the largest figure of merit, A delta-shaped transport distribution is found to maximize the thermoelectric properties, This result indicates that a narrow distribution of the energy of the electrons participating in the transport process is needed for maximum thermoelectric efficiency, Some possible realizations of this idea are discussed.