Thermoelectric and Electrical Properties of Metal Intercalated Bilayer Graphene
Most thermoelectric materials that convert waste heat into electric power are inorganic materials, which poses problems in terms of flexibility and environmental load. Graphene is a carbon material with a two-dimensional structure and is expected to be a new thermoelectric material because it has peculiar electrical characteristics while having flexibility. In this study, as a result of investigating the thermoelectric properties of high-quality bilayer graphene synthesized by plasma CVD, the Seebeck coefficient was 70 μV/K and the power factor was 2,960 mW/mK^2. In addition, as a result of an experiment in which potassium was electrochemically intercalated into two-layer graphene, the Seebeck coefficient was improved, but the electrical conductivity was reduced. A slight negative shift of the Dirac point was seen in the measurement of electrical properties.