Recent Progress in Cu ₂ Se‐Based Thermoelectric Materials

Thermoelectric technology enables direct conversion between heat and electricity, offering great promise for waste heat recovery and electronic cooling. Due to non‐toxicity, earth‐abundant elements, a wide service temperature range, and high thermoelectric performance, Cu 2 Se‐based thermoelectric materials have garnered significant attention. Simultaneously enhancing the thermoelectric performance and stability of Cu 2 Se‐based thermoelectric materials remains a great challenge. Here, a comprehensive overview of recent progress and future prospects for Cu 2 Se‐based thermoelectric materials is presented. This review begins with an introduction to the fundamental properties of Cu 2 Se, including its complex crystal structure and electronic band structure. Subsequently, the latest progress for optimizing the thermoelectric performance of Cu 2 Se is summarized. Next, strategies to enhance the stability of Cu 2 Se materials are discussed. Finally, the future challenges for advancing Cu 2 Se‐based thermoelectric materials are discussed.