Construction of ultrathin perovskite solar cells by different periodic structures

In order to prepare semitransparent and high efficiency ultrathin perovskite solar cells by improving photons absorption efficiency, different periodic structures are introduced and described in ultrathin perovskite solar cells. Perovskite periodic structure modifications are aimed to improve the current of the ultrathin perovskite solar cells, so as to obtain high performance of the ultrathin perovskite solar cells. The COMSOL Multi physics is used to construct the ultrathin perovskite solar cells with different periodic structures of spherical, rectangular and triangular, making the ultrathin devices (with very thin absorption layer) capable of full absorption of incident sunlight. The periodic structures effectively increase the contact area between functional layer and electrodes, thus increasing the current of the device. It is shown that the device current increased with increasing effective contact area. Compared with previous studies, the current of triangle structure solar cells have been increased by 19% compared to the layered structure. In addition, the results of simulations are compared with experiments of the layered structure. It is shown that the current of the prepared device was similar with our simulation results, which confirms the correctness of numerical calculations and robustness of obtained results.