Modeling of low‐bandgap solar cells for thermophotovoltaic applications

Low‐bandgap solar cells can be used effectively and efficiently for thermophotovoltaic applications. A 0.75 eV bandgap InGaAs solar cell is an ideal device for the Er‐YAG selective emitter with a emission peak around 1.5 μm. Modeling results predict that the InGaAs cell efficiencies of nearly 30% are possible for the Er‐YAG selective emitter source at 1500 K.