thermophotovoltaic cell

A thermophotovoltaic (TPV) cell (size 1 cm x 1 cm) mounted on a heat sink designed to measure the TPV cell efficiency. To measure the efficiency, the cell is exposed to an emitter and simultaneous measurements of electric power and heat flow through the device are taken. Image: Felice Frankel
A heat engine with no moving parts converts heat to electricity with over 40 percent efficiency