Lee, Dongchan Park, Woomin Kang, Yeong A. Lim, Hyeong Taek Park, Seungbeom Mun, Yeongjun Kim, Jungwon Jang, Kwang-Suk 2024-01-19T10:30:54Z 2024-01-19T10:30:54Z 2023-02-03 2023-01 1944-8244 https://pubs.kist.re.kr/handle/201004/114140 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. English American Chemical Society Substrate-Free Thermoelectric 25 μm-Thick Ag2Se Films with High Flexibility and In-Plane zT of 0.5 at Room Temperature Article 10.1021/acsami.2c20115 1 ACS Applied Materials & Interfaces, v.15, no.2, pp.3047 - 3053 ACS Applied Materials & Interfaces 15 2 3047 3053 N scie scopus 000910912600001 2-s2.0-85146184344 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article; Early Access PERFORMANCE BETA-AG2SE flexible thermoelectrics silver selenide Ag2Se free-standing films in-plane thermal conductivity