Wearable thermoelectric power generator : device design and process development = 웨어러블 열전 발전소자 : 소자 설계 및 공정 개발device design and process development

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The conversion of body heat into electrical energy by a thermoelectric (TE) power generator is useful for self-powered wearable mobile electronic systems. Especially, flexible thermoelectric generators (f-TEGs) are emerging as a semi-permanent power source for self-powered sensors, which is an important area of research for the next generation smart network monitoring systems in the Internet-of-things (IoT) era. However, previously reported organic-based flexible TE generators generate low output power that is far below the requirements for wearable electronic devices. Given such reason, researchers have studied submicron or micron scale inorganic thin films due to high power density and flexibility using conventional semiconductor devices processing tools such as DC magnetron sputtering, co-evaporation, or electrodeposition. However, the thin-film thermoelectric device is not able to generate sufficient electric energy for powering the wearable electronic systems due to very low temperature difference across the TE thin film. In addition, conventional TE generators usually have a relatively thick and bulky polymer or ceramic substrate, which causes serious thermal energy loss and limits the flexibility and output. This dissertation focuses on a device design and process development for fabricating a high-performance flexible thermoelectric generator that has high output power density but also excellent flexibility and mechanical stability, to overcome the limitations of commercial bulk-type TEG, and scale-up of the wearable power generator for improving electrical power generation on human body and heat sources. Screening printing technique: synthesis of Cu and TE pastes and subsequent annealing process, novel device design for a high power and flexible device, laser multi-scanning process and ionized defect engineering of a high-performance screen-printed TE thick film will be discussed.
Cho, Byung Jinresearcher조병진researcher
한국과학기술원 :전기및전자공학부,
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학위논문(박사) - 한국과학기술원 : 전기및전자공학부, 2017.2,[x, 134 p. :]


웨어러블▼a유연 열전 발전소자▼a스크린프린팅 기술▼a열전 페이스트▼a셀프서스테이닝 방식 소자 구조▼a유리섬유▼a레이저 멀티 스캐닝 공정▼a비스무스 텔루륨 셀루륨 후막▼a비스무스 안티몬 텔레륨 후막; Wearable▼aFlexible thermoelectric generator▼aScreen printing technique▼aThermoelectric paste▼aSelf-sustaining device structure▼aGlass fabric▼aLaser multi-scanning process▼a$Bi_2Te_{2.7}Se_{0.3}$ thick film▼a$Bi_{0.5}Sb_{1.5}Te_3$ thick film

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