Low Dimensional Organic Compounds as Promising Thermoelectric Materials
نویسندگان
چکیده
The thermoelectric properties of quasi-one-dimensional (Q1D) organic crystals with p-type conduction band are studied. Two main electron-phonon interaction mechanisms and carriers scattering on impurities are taken into account. The relaxation time as a function of carrier energy is analyzed for different values of crystal parameters. It is shown that under certain conditions, when the interference of both electron-phonon interactions is well manifested, the relaxation time takes the form of Lorentzian, the maximum of which is inversely proportional to the impurity concentration and can be very high and sharp, if the crystal is sufficiently pure. The thermoelectric figure of merit is modelled in such Q1D organic crystals as a function of Fermi energy for different parameters and different degree of purity. The highest calculated value of ZT = 21 at room temperature in these p-type crystals is presented.
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