The idea is simple in theory: create a flexible thermoelectric generator that can wrap around hot pipes or other surfaces to gather otherwise lost heat. The full (paywalled) paper is also available.

A thermoelectric material that can be used in wearable devices such as smart clothing and maintains stable thermal energy ...

The device consists of an optimized thermoelectric generator (TEG) placed in thermal contact with the back of a perovskite solar cell with a surface area of 1 cm² by means of a layer of thermal ...