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Semiconductors flex thermoelectric power

Description Ductile inorganic semiconductors can help enable self-powered wearable electronics Thermoelectric materials can convert a temperature gradient into electricity or convert electricity into a temperature gradient. They can be used to harvest waste heat and help to reduce the carbon footprint of many applications, ranging from computers to industrial equipment. Because the heat sources usually have a large area, planar thermoelectric generators with series-connected thermoelectric materials can satisfy the requirements. However, these materials—mostly inorganic thermoelectric semiconductors—are normally rigid and brittle, which restricts their application. On page 854 of this issue, Yang et al. (1) report a room-temperature ductile inorganic thermoelectric semiconductor that is flexible. This material opens the door to new applications such as wearable devices that can be powered by converting body heat to electricity.