Cho, Hyeon Jang, Dongju Yoon, Jinsu Ryu, Yong-Sang Lee, Byeonggeol Lee, Byeongmoon Chung, Seungjun Hong, Yongtaek 2024-01-19T09:31:12Z 2024-01-19T09:31:12Z 2023-06-29 2023-06 2380-8195 https://pubs.kist.re.kr/handle/201004/113666 Stretchablethermoelectric generators (s-TEGs) have beenregardedas promising energy harvesters for self-powered wearable electronics.However, previous s-TEGs show low power generation capacity due totheir high module resistances, originating from the poor electromechanicalinterfaces between rigid-soft components and the high electricalresistances of stretchable interconnects. Herein, we report strategiesto boost thermoelectric performance, which allows us to operate wirelesscommunication systems from body heat by generating a power of 2.6mW. Electromechanically graded interlayers that mediate discrete functionalitiesat the interfaces effectively reduce junction resistances, and solution-basedwelding that transforms scattered networks into mesh-like structuresproduces highly conductive and strain-resilient interconnects, respectively.Soft heat conductors are included to improve thermal interfaces, minimizingthermal impedance of elastomeric substrates. Consequently, the powergeneration capacity is significantly enhanced, exhibiting the highestnormalized power density of 1.48 mu W cm(-2) K-2 among reported high-performance s-TEGs. Our s-TEGsprovide realistic solutions for sustainable self-powered electronics. English American Chemical Society Milliwatt-Scale Body-Heat Harvesting Using Stretchable Thermoelectric Generators for Fully Untethered, Self-Sustainable Wearables Article 10.1021/acsenergylett.3c00243 1 ACS Energy Letters, v.8, no.6, pp.2585 - 2594 ACS Energy Letters 8 6 2585 2594 N scie scopus 001005904000001 2-s2.0-85160905327 Chemistry, Physical Electrochemistry Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article REDUCED CONTACT RESISTANCE DIFFUSION BARRIER SILVER NANOWIRES WELDING PROCESS TRANSPARENT POWER PERFORMANCE MODULES