Pressure-induced enhancement of thermoelectric performance in palladium sulfide

Thermoelectric materials with the properties of stability and environmental friendly meet the commercial demand in current time. Recent advances in developing thermoelectric materials for power generation always optimize at high temperatures. Different from the method of warming sample leading to the lattice expansion, applying pressure can bring a times enhancement of thermoelectric figure of merit near room temperature through the lattice compression. The obtained almost same figure of merit by two opposite methods points to the great potential for the further improvement of the thermoelectric efficiency.