Inorganic‐based printed thermoelectric materials and devices

One of the simplest ways to generate electric power from waste heat is thermoelectric (TE) energy conversion. So far, most of the research on thermoelectrics has focused on inorganic bulk TE materials and their device applications. However, high production costs per power output and limited shape-conformity hinder applications of state-of-the-art thermoelectric devices. In recent years, printed thermoelectrics has emerged as an exciting pathway for their potential in the production of low-cost shape-conformable thermoelectric devices. Although several inorganic bulk TE materials with high performance were successfully developed, achieving high performance in inorganic-based printed TE materials is still a challenge. Nevertheless, significant progress has been made in printed thermoelectrics in recent years. In this review article, we start with an introduction signifying the importance of printed thermoelectrics followed by a discussion of theoretical concepts of thermoelectricity, from fundamental transport phenomena to device efficiency. Afterward, we summarize the general process of inorganic TE ink formulation and elaborate on the current development of the inorganic and hybrid inks with the mention of their TE properties and their influencing factors. ... mehrIn the end, we highlight thermoelectric devices with different architecture and geometries by documenting their performance and fabrication techniques.