ナノサイズ網状金属電極を用いた金属-半導体-金属多層膜TPV電池

抄録

Electromagnetic field around metal-semiconductor-metal (MSM) multilayered thermophotovoltaic (TPV) cell was numerically simulated using three dimensional finite difference time domain method to obtain absorptance of MSM multilayer. In the current study, gold and gallium antimony are assumed to be materials of metal and semiconductor layer, respectively. Even if there is no top metal layer, a peak of absorptance was observed because of optical interference inside gallium antimony thin film. Here, the peak wavelength shifted to shorter wavelength region by placing squared cavity array layer called fishnet layer on the gallium antimony layer. Moreover, the wavelength of first peak of optical interference became shorter with decreasing the width of cavity, so that the absorbing spectral intensity of multilayer became suitable for practical power generation.