Design And Performance Of Surface Plasmon Perovskite Solar Cells

Solar energy is abundant and inexhaustible.Developing solar photovoltaic power generation is an important renewable energy technology.Under the background of a series of environmental problems such as ecological environment pollution and energy exhaustion,the use of clean energy will play an increasingly important role in the future.Among many Solar Cells,Perovskite Solar Cells(PSCs)are the leading thin-film Solar Cells.The photoelectric conversion efficiency of PSCs rose from3.81% in 2009 to 26.1% in just a few years,far surpassing other new Solar Cells.However,the ultra-thin perovskite layer will cause the problem of low light absorption rate,which will reduce the Power Conversion Efficiency(PCE)of the battery.In order to improve the optical absorption of the active layer,the metal nanopore array structure was introduced into the cell,and the optical absorption rate of the active layer was increased by exciting the isoplasmon on the surface.By using Comsol Multiphysics simulation software and finite element method,two kinds of PSC based on metal nanopore array structure were designed.By scanning and optimizing the parameters of the designed PSC structure,the influence of each parameter on the optical absorption performance of PSC perovskite layer was studied.The main research contents of this paper are as follows:1.Aiming at the problem of insufficient optical absorption in PSC with a thickness of 100 nm in perovskite layer,a PSC based on a unilateral L-shaped Au nanopore array film as a transparent top electrode was designed.The results show that the absorbance of perovskite active layer in the wavelength range of 300 nm-800 nm is up to 67.9% in the PSC based on unilateral L-hole array,which is 8.8% higher than that of the flat cell,when the light is vertically incident.The enhanced optical absorbance is mainly in the band of 550 nm-800 nm.2.A PSC based on a two-sided L-shaped Au nanopore array is designed.The results show that: When the incident light is perpendicular to the device,for the ultra-thin PSC with a thickness of 100 nm perovskite layer,the absorption rate of the active layer in the optimized PSC with two-side L-hole array structure reaches 72.7%in the wavelength range of 300 nm-800 nm,which is 16.5% higher than that of the flat cell structure.Moreover,the designed structure can also achieve the purpose of enhanced absorption for PSC with the thickness of perovskite active layer less than300 nm.The PSC with the hole array with the thickness of perovskite active layer can achieve 93.8% of the absorption rate of the 300 nm active layer thickness of the plate structure3.In real life,the incident Angle of sunlight changes continuously with time,so the vertical incident light shining on the bilateral L-shaped hole array PSC is replaced by oblique incident light.When the oblique angles of TE and TM polarized light are both 60°,the absorbance of the two-sided L-hole array PSC is 68.15%,which is still higher than that of the flat panel cell under the condition of vertical incidence,indicating that the designed cell also has polarization insensitivity and wide-angle absorption.