Wearable solar thermoelectric generator driven by unprecedentedly high temperature difference

Title
Wearable solar thermoelectric generator driven by unprecedentedly high temperature difference
Authors
김진상최경진정연수정대한강성범Fredric Kim정명훈이기석손재성백정민
Keywords
thermoelectric; Wearable; solar absorber
Issue Date
2017-10
Publisher
Nano energy
Citation
VOL 40-672
Abstract
Converting body heat into electricity using flexible thermoelectric generators can be useful for self-powered wearable electronic devices. However, the temperature difference that can be obtained by body heat is insufficient, which limits its practical applications. In this study, we present a wearable solar thermoelectric generator driven by a significantly high temperature difference created by introducing a local solar absorber and thermoelectric legs on a polyimide substrate. The solar absorber is a five-period Ti/MgF2 superlattice, in which the structure and thickness of each layer was designed for optimal absorption of sunlight. The thermoelectric legs were prepared by dispenser printing with an ink consisting of mechanically alloyed BiTe-based powders and an Sb2Te3-based sintering additive dispersed in glycerol. Thermoelectric p- and n-type legs have electrical conductivities of similar to 25,000 S m(-1) with Seebeck coefficients of 166.37 and - 116.38 mu V K-1, respectively. When exposed to sunlight, a wearable solar thermoelectric generator comprising 10 pairs of p-n legs has an open-circuit voltage of 55.15 mV and an output power of 4.44 mu W. The temperature difference is as high as 20.9 degrees C, which is much higher than the typical temperature differences of 1.5-4.1 degrees C of wearable thermoelectric generators driven by body heat. The wearable solar thermoelectric generators have been demonstrated on various surfaces exposed to sunlight, such as clothes or windows.
URI
http://pubs.kist.re.kr/handle/201004/66421
ISSN
2211-2855
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE