Light management in Perovskite Solar Cells using multiple Gratings

Perovskite Solar Cells are poor absorbers in the near-infrared region of the solar spectrum. In this paper, a novel method is provided to enhance absorption. The method increases the absorption by exciting the plasmonic modes and scattering the light through graded gratings. Since The surface plasmons resonances and light scattering depend on the dimensions of the gratings, by selecting the proper dimensions of graded gratings, they can be excited effectively. The simulation results based on the finite element method (FEM) show absorption enhancement near four-folds in the near-infrared region. The maximum average absorption of 67.1%, short circuit current density of 27.59 mA/cm2, and efficiency of 25.52% is achieved which shows an enhancement of 6.3%, 5.2%, and 4.3%, respectively compared to the reference cell. The behavior of the designed cell under oblique illumination from 0 to 85 degrees indicates that graded gratings increase light absorption up to an angle of 45 degrees. Meanwhile, the cell with graded gratings gives an average absorption near 67% up to the angle of ±45 degrees and is not sensitive to the illumination angle. The proposed structures trap the light inside the cell and thus promise high-efficiency Solar Cells.

Light management in Perovskite Solar Cells using multiple Gratings Keywords:

Thin-Film Solar Cells , Perovskite , Graded Gratings , Absorption , Plasmonic , Scattering