High-Performance Flexible Thermoelectric Power Generator Using Laser Multiscanning Lift-Off Process
journal contributionposted on 2016-11-17, 00:00 authored by Sun Jin Kim, Han Eol Lee, Hyeongdo Choi, Yongjun Kim, Ju Hyung We, Ji Seon Shin, Keon Jae Lee, Byung Jin Cho
Flexible thermoelectric generators (f-TEGs) are emerging as a semipermanent power source for self-powered sensors, which is an important area of research for next-generation smart network monitoring systems in the Internet-of-things era. We report in this paper a f-TEG produced by a screen-printing technique (SPT) and a laser multiscanning (LMS) lift-off process. A screen-printed TEG was fabricated on a SiO2/a-Si/quartz substrate via the SPT process, and the LMS process completely separated the rigid quartz substrate from the original TEG by selective reaction of the XeCl excimer laser with the exfoliation layer (a-Si). Using these techniques, we fabricate a prototype f-TEG composed of an array of 72 TE couples that exhibits high flexibility at various bending radii, together with excellent output performance (4.78 mW/cm2 and 20.8 mW/g at ΔT = 25 °C). There is no significant change in the device performance even under repeated bending of 8000 cycles.
Read the peer-reviewed publication
XeCl excimer lasera-Si8000 cyclesquartz substratedevice performance72 TE couplesself-powered sensorsLaser Multiscanning Lift-Off ProcessInternet-of-things erascreen-printed TEGLMS processlaser multiscanningmWSPT processΔ Tsemipermanent power sourceThermoelectric Power Generatorscreen-printing techniquenetwork monitoring systemsexfoliation layerlift-off processprototype f-TEG