An international research group has designed an innovative solar cell design. By using a top absorber consisting of methylammonium lead iodide (MAPbI3), a lead halide perovskite, and a bottom absorber consisting of FA0.5MA0.5Pb0.5Sn0.5I3, a perovskite material, the cell maximizes light absorption over a broad spectrum.
An international research team has developed a novel design for inverted fully perovskite double-layer solar cells. The design includes two-layer heterojunctions with different perovskite materials, allowing for better absorption in several regions of the light spectrum.
Researchers also used SCAPS-1D sun- cell capacitance dance phardwarewhich is a thin film solar cell simulation tool developed by Ghent University in Belgium for simulating multiple cells.
“By varying the parameters of the damping layers and the working of the contacts, we demonstrate better performance for the proposed device,” the researchers said. “Furthermore, we demonstrate that cell temperature plays a significant role in the functioning of this bilayer cell.”
They said that the thickness of the two layers has a significant effect on the performance of the two-layer cell, and the thickness of the broadband suppression layer should be thinner than that of the narrow bandgap.
“The best thickness for MAPbI3 and FA0.5Mon0.5Pb0.5Sn0.5I3 is 100 nm and 600 nm, they said.
The scientists designed a solar cell with a substrate made of fluorine-doped tin oxide (FTO), A hole transporting material (HTM) based on PEDOT:PSS, two absorbers, an electron acceptor made of phenyl C61 butyric acid methyl ester (PCBM) and a metal contact made of aluminum (Al).
Through simulations under normal lighting conditions, the research team found that the cell could achieve a power conversion efficiency of 24.83%, an open-circuit voltage of 0.9V, and a short-circuit current density of 34.76mA/cm.2and a fill factor of 79.4%.
The scientists presented the new cell technology in the paper “Performance analyzes of a highly efficient inverted all-perovskite double-layer solar cell,” published recently Scientific reports. The research group includes researchers from Tabriz University in Iran and Bilkent University in Turkey.