Nanostructured Ceramic Coatings Enable the Potential of Thermophotovoltaics

The concept of the thermophotovoltaic (TPV) device has been around for more than 50 years.  In that time, its promise of a theoretical conversion efficiency of over 80 percent has been a tantalizing improvement over the still meek conversion efficiencies found in the average commercially available single-junction, silicon-based solar cells that reach just 15 percent.

Despite their theoretical promise, TPV devices haven’t been able to achieve much higher than 8 percent conversion efficiency. The problem has been that the thermal emitter (one of the two main components that make up a TPV device, the other being the photovoltaic diode) has yet to be made of a material that can withstand the temperatures required to make it effective.

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