Thermoelectric transport in V2O5 thin films
Résumé
The density functional theory and the Boltzmann transport equation were used to calculate the thermoelectric transport coefficients for bulk V 2O5. We performed the structural relaxation for the given compound based on the ABINIT code. The temperature dependence of the Seebeck coefficient as well as of the electrical and thermal electron conductivities of the X-ray and relaxed structures displays an anisotropic behavior while the corresponding traces for both structures present similar values. The simulation results are compared with the electro-optical measurement of the thermoelectric properties of V2O5 thin films obtained by thermal evaporation with different post annealing treatments. A Seebeck coefficient of -218μV/K at T=573K was obtained in the in-plane direction for thin films with thickness less than 100nm. © Published under licence by IOP Publishing Ltd.
Mots clés
Annealing
Boltzmann equation
Density functional theory
Optical data processing
Seebeck coefficient
Temperature distribution
Thermal evaporation
Thermionic emission
Anisotropic behaviors
Boltzmann transport equation
Electro-optical measurements
In-plane direction
Post annealing treatment
Temperature dependence
Thermoelectric properties
Thermoelectric transport
Thin films