Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 18, Pages 15791-15797Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b04752
Keywords
stretchability; flexibility; thermoelectric generator; liquid alloy; interconnect; contact resistance; elastomer packaging
Funding
- Swedish Foundation for Strategic Research [EM11-0002, SE13-0061]
- Swedish Research Council [621-2014-5596]
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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 mu W/cm(2) 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.
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