Abstract

A new point of view on thermoelectric phenomena as a transport process of non- equilibrium charge carriers is presented. It is shown that Fermi quasilevels which characterise transport in systems far from equilibrium can be nonmonotonic functions of position. The role of recombination in forming thermoelectric phenomena is discussed for the first time. It is shown that in the presence of thermal fields a new term in the expression for recombination appears which depends on the inhomogeneity of the temperature field. If electron and hole temperatures are different, which is typical of semiconductors, then one more new term appears in the expres- sion for recombination proportional to the difference of electron and hole temperatures. A new method for the characterisation of scmiconductor materials connected with the measurement of thcrmopower is proposed. It is shown that nonstationary thermal fields are best suited for this purpose.

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