Optics and Photonics Society of Iran

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In this paper, the finite-difference-time-domain method (FDTD) was used. At first, for any of glass, transparency conductive oxide and titanium dioxide layers, the optimum thickness for maximum light transmission and the best thickness of active layer for more absorption was calculated for investigation of optical effects. After designing cell structure with optimum thickness, the absorption power was calculated in different distances in cell and the minimum absorption power occurred in 200 nm at the beginning of the active layer. The core-shell structure in the form of same-center-spheres by 50, 70, 66 and 70 nm radius for gold, silver, aluminum, and alumina, respectively, with center-to-center distance 142 nm was set in the solar cell active layer. In the following, optical properties were studied by set the core-shell structures in 200 nm at the beginning of the active layer. Light absorption in the solar cell with core-shell structure was more than the solar cell without core-shell structure. Amount of light absorption, electron-hole pair generation and short circuit current density for aluminum-alumina core-shell structure was more than the gold-silver core-shell structure. 

Keywords: aluminum-alumina core-shell structure, gold-silver core-shell structure, perovskite solar cell, simulation

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