Modelling of 1D triangular Ag-grating for enhanced absorption in thin film solar cell

This paper mainly focuses on Design and Optimization of 1-D triangular grating for Solar cell applications using Silver Metal. The weak light trapping in the active layer of thin film solar cells is a major issue in solar cell technology. Periodic grating is one of the methods used to improve light absorption in the thin film solar cell's substrate. The current study presents the effect of a 1-D triangular grating device on solar cell absorption enhancement. The 5.3a COMSOL RF module is used for the desired geometry comprising silicon (c-Si) crystalline as the substrate. The slit width of grating is optimized using near and far-Field Analysis in the designed structure magnifies the light-trapping process in the thin-film solar cell. For this purpose, the transmission spectrums are analyzed at various slit angles angle (142 degrees-148 degrees), constant film thickness (100 nm), and constant periodicity (700 nm). The optimal value of the slit width is obtained as 350 nm, which is half the periodicity of the grating device. Variation of theta= 144.57 degrees yielded the highest value of electric field which corresponds to lowest value of relative transmission with shortest full width at half maxima peak value of the dip associated with efficient excitation of the Surface plasmons polaritons. The transmission spectra were taken by varying film angle (142 degrees-148 degrees) at normal incidence to observe the acceptable value of film thickness for the optimization of the grating system. Such optimization is quite helpful for improvement in the light absorption hence overall efficiency of thin film solar cells. [GRAPHICS] .

Automated summary

This paper focuses on the design and optimization of a one-dimensional triangular grating for solar cell applications using silver metal. The grating significantly enhances light absorption in thin film solar cells, and optimization of slit width, periodicity, and film thickness can improve the overall efficiency of the solar cells.