Mitigation of Temperature Effects and Performance Enhancement of Perovskite Solar Cells Using Nano-Pyramids Grating

Abstract

For their impressive electrical and optical characteristics, perovskite solar cells (PSCs) have been presented to the nanostructured photovoltaics field as one of the encouraging replacements of both conventional silicon based solar cells (SCs) and thin film SCs. In this paper, we present a study of the performance of CH3NH3PbI3 PSC, as one of the prime candidates of PSCs, at different values of temperature and solar irradiance power with the aid of a 3-D finite element method (FEM) COMSOL Multiphysics simulation indicating the significant reduction of the PSC’s power conversion efficiency (PCE) upon either increasing the operating temperature or decreasing solar irradiance power. Then, we study the effect of electron transporting layer (ETL) grating on the electrical parameter of the cell. Results of the proposed study show that for PSCs with optimal 400nm CH3NH3PbI3 absorber thickness and adjusted thickness of other layers, adding pyramid grating to ETL causes the power conversion efficiency (PCE) to go up to $\mathrm {21.058\%}$ instead of $\mathrm {19.818\%}$ in case of flat layer at room temperature, with short circuit current density ( $\text{J}_{\mathrm {SC}}$ ) of $\mathrm {25.858 mA/}{\mathrm {cm}}^{2}$ , open circuit voltage ( $\text{V}_{\mathrm {OC}}$ ) of $\mathrm {1 Volt}$ and $\mathrm {81.44\%}$ filling factor (FF). Results also indicate that using such periodic structure of ETL can compensate the reduction of PCE caused by temperature increasing.

Keywords

• Nanograting
• layer thickness
• PCE
• perovskite
• solar cells