Abstract
The interaction of light with plasmonic nanostructures can induce electric field intensity either around or at the surface of the nanostructures. The enhanced intensity of the electric field can increase the probability of light absorption in the active layer of solar cells. The absorption edge of perovskite solar cells (PSCs), which is almost 800 nm, can be raised to higher wavelengths with the help of plasmonic nanostructures due to their perfect photovoltaic characteristics. We placed plasmonic nanoparticles (NPs) with different radii (20–60 nm) within the bulk of the perovskite solar cell and found that the Au nanoparticles with a radius of 60 nm increased the absorption of the cell by 20% compared to the bare one without Au nanoparticles. By increasing the radius of the nanoparticles, the total absorption of the cell will increase because of the scattering enhancement. The results reveal that the best case is the PSC with the NP radius of 60 nm.
Highlights
One of the problems of methylammonium lead halide (MAPbI3 ) perovskite solar cells (PSCs) is their low absorption edge, which is around 800 nm
Plasmonic nanostructures have been used to improve the ability of light absorption in the PSC [1,2,3]
A considerable improvement has been shown in the light current of MAPbI3 PSCs by including metallic nanoparticles (NPs) with a diameter of 40–80 nm in which (Au, Ag) shells coated the surface of metal oxides (TiO2, SiO2 )
Summary
One of the problems of methylammonium lead halide (MAPbI3 ) perovskite solar cells (PSCs) is their low absorption edge, which is around 800 nm. They are not able to absorb the near-infrared parts of the solar spectrum. In this regard, different nanostructures have been suggested to enhance light trapping and light absorption in the bulk of the PSC. A considerable improvement has been shown in the light current of MAPbI3 PSCs by including metallic nanoparticles (NPs) with a diameter of 40–80 nm in which (Au, Ag) shells coated the surface of metal oxides (TiO2 , SiO2 ). In [6], the frequency domain time domain (FDTD) method was used to simulate a three-dimensional PSC structure and the absorption enhancement of 6–12% was obtained depending on the thickness of the absorber layer
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