期刊
ACS APPLIED MATERIALS & INTERFACES
卷 15, 期 2, 页码 3047-3053出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c20115
关键词
flexible thermoelectrics; silver selenide; Ag2Se; free-standing films; in-plane thermal conductivity
Thermoelectric Ag2Se films that are free-standing exhibit high thermoelectric performance and superior flexibility compared to films constrained on a substrate. The flexibility of these films was systematically investigated in terms of bending strain, bending radius, thickness, and elastic modulus. A substrate-free, flexible thermoelectric generator was successfully fabricated using these free-standing Ag2Se films, demonstrating their energy-harvesting capacity.
Thermoelectric inorganic films are flexible when sufficiently thin. By removing the substrate, that is, making them free-standing, the flexibility of thermoelectric films can be enhanced to the utmost extent. However, studies on the flexibility of free-standing thermoelectric inorganic films have not yet been reported. Herein, the high thermoelectric performance and flexibility of free-standing thermoelectric Ag2Se films are reported. Free-standing Ag2Se films with a thickness of 25.0 +/- 3.9 mu m exhibited an in-plane zT of 0.514 +/- 0.060 at room temperature. These films exhibited superior flexibility compared to Ag2Se films constrained on a substrate. The flexibility of the Ag2Se films was systematically investigated in terms of bending strain, bending radius, thickness, and elastic modulus. Using free-standing Ag2Se films, a substrate-free, flexible thermoelectric generator was fabricated. The energy-harvesting capacity of the thermoelectric generator was also demonstrated.
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