Thermoelectric Effect in Graphene-Based Three-Terminal Junction

Abstract

This paper presents the thermoelectric properties of graphene-based three-terminal junction on SiO2/Si substrate. The device demonstrates rectified output voltage while applying electrical (AC/DC) signal or temperature gradient at the input terminals. The voltage detection sensitivity of 736.38 mV/mW and noise equivalent power of 26 pW/Hz1/2 is achieved at 15 V. At the temperature gradient of 150 K, the proposed device exhibits a thermal voltage of 0.83 mV at the output terminal. Accordingly, Seebeck coefficient of 82 and 123 VK1 is obtained at 300 and 450 K, respectively. The results are further validated by the analytical model and are well in agreement with the simulation results obtained utilizing Silvaco TCAD software. The results suggest that the proposed G-TTJ can be realised for future energy harvesting applications in addition to microwave/THz detection.