Optimization of Metal/Insulator/Metal structured emitter for spectrally controlled Metal/Semiconductor/Metal structured thermophotovoltaic cell

Abstract

A spectral emittance of Metal/Insulator/Metal (MIM) structured emitter was optimized for a spectrally controlled Metal/Semiconductor/Metal (MSM) structured thermophotovoltaic (TPV) cell using a Bayesian optimization method. Corresponding to the spectral absorptance of MSM cell around the bandgap wavelength of GaSb semiconductor, an emittance with an almost unity only around the bandgap could be achieved by selecting the adequate structure of MIM emitter.