Thermophotovoltaics (TPV) is the conversion of thermal radiation released by a thermal emitter into electricity by means of a photovoltaic cell.
Power generation with a TPV system can be envisaged for almost any process and an absence of moving parts has the advantage of low maintenance costs. Thermal emission scales with temperature to a power of 4, meaning temperature above 1000 °C is required to generate significant power in such systems.
However, the wide spectral width of thermal radiation limits the efficiency of TPV conversion as only part of the spectrum is accepted by the photovoltaic cell. August’s Paper of the Month by Dyachenko et al., attempts to solve the TPV efficiency problem by designing and using a unique refractory metamaterial as an emitter instead of the traditional structural resonances.