Introducing Halide Perovskites as Future Capable Thermoelectric Materials

Halide perovskites have emerged as a promising material class in various energy conversion research fields, including photovoltaics, photodetection, light emission, memristors, ferroelectrics, and photothermal conversion, due to their exceptional optoelectronic and charge carrier transport properties. However, the thermoelectric properties of halide perovskites have received limited attention despite their potential. These materials are classified as phonon glass and electron crystal, exhibiting ultralow thermal conductivity and a superior Seebeck coefficient, coupled with decent mobility and charge carrier tunability. Nevertheless, they face challenges such as instability, poor electrical conductivity, and a low power factor. Among halide perovskites, Pb- and Sn-based materials have demonstrated superior thermoelectric properties. For future thermoelectric applications, reliable synthesis methods and accurate thermoelectric property measurements are essential. In this talk, we introduce perovskites as a new thermoelectric material system and discuss their research potential and future perspectives for energy harvesting and sensor applications.