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Stretchable Thermoelectric Generators Metallized with Liquid Alloy

Seung Hee Jeong ; Francisco Javier Cruz ; Si Chen (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Laurent Gravier ; Johan Liu (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Zhigang Wu ; Klas Hjort ; Shi Li Zhang ; Zhi Bin Zhang
ACS Applied Materials and Interfaces (19448244). Vol. 9 (2017), 18, p. 15791-15797.
[Artikel, refereegranskad vetenskaplig]

Conventional thermoelectric generators (TEGs) are normally hard, rigid, and flat. However, most objects have curvy surfaces, which require soft and even stretchable TEGs for maximizing efficiency of thermal energy harvesting. Here, soft and stretchable TEGs using conventional rigid Bi2Te3 pellets metallized with a liquid alloy is reported. The fabrication is implemented by means of a tailored layer-by-layer fabrication process. The STEGs exhibit an output power density of 40.6 ?W/cm2 at room temperature. The STEGs are operational after being mechanically stretched-and-released more than 1000 times, thanks to the compliant contact between the liquid alloy interconnects and the rigid pellets. The demonstrated interconnect scheme will provide a new route to the development of soft and stretchable energy-harvesting avenues for a variety of emerging electronic applications.

Nyckelord: contact resistance; elastomer packaging; flexibility; interconnect; liquid alloy; stretchability; thermoelectric generator

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Denna post skapades 2017-06-14.
CPL Pubid: 249813


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