ENHANCED THERMOELECTRIC PROPERTIES OF TIN SELENIDE-BASED FLEXIBLE POLYMER COMPOSITES

Abstract

In this study, we have investigated the thermoelectric properties of Tin Selenide (SnSe) and fabricated polymer based thin films doped with SnSe. SnSe was synthesized using the Solvothermal synthesis method. The structural properties were studied using XRD, FTIR spectroscopy and the thermoelectric properties were studied using the bridge method and the four probe method within the temperature range 270K - 420K. The mean resistance of the sample in a thin pelleted form is 1037 ± 18 Ohm. The sample was found to be thermally stable up to 1073K using TGA. The peak value of electrical conductivity was found out to be 0.115 S/cm at 352K. The Seebeck coefficient of the sample was also found out to be stable within the given temperature range with an optimized value of 0.184 mV/K with a power factor of 1.324 x 10-3 µWm-1 K-2. The thin films were synthesized using the Drop-Casting method. The structural properties were studied using XRD and FTIR and the thermoelectric properties were studied using the bridge method and the four probe method within the temperature range 270K - 420K. The results certify the capability of SnSe as a promising base material for Thermoelectric devices and the stability of the power factor over low temperature range also promises real world applications.