Abstract

In the present scenario, Two-dimensional (2D) materials have emerged as one of the promising candidates for harvesting some fraction of heat available in abundant around us via Thermoelectric (TE) device. Among many of the available 2D materials MXene, graphene, Black Phosphorous (BP) and two-dimensional (2D) metal dichalcogenides (TMDCs) have attracted lot of attention as high-performance materials due to their unique thermal, mechanical and optoelectronic properties owing to their enhanced see beck coefficient. Over the last few years, most of the research has been focused on enhancing the thermoelectric figure of merit (ZT) by material engineering, defect engineering, doping and hetero structure formation. Recent development in film formation, material synthesis and their optimization have provided better device quality, uniform layering and enhanced device performance. Additionally, inclusion of these materials in wearable and flexible electronics has opened new avenues for various applications. The present review provides a detailed discussion of recent development in 2D based thermoelectric devices including device formation, material innovation and fundamentals. Some of the key challenges such as scalability and environment stability has been also discussed. Lastly, we highlighted emerging 2D materials, future direction and innovations towards sustainable, cost effective and multifunctional energy generation solutions.

Keywords:Two-dimensional (2D) materials; Figure of merit (ZT); Seebeck coefficient; Thermoelectric