Broadband Solar Energy Absorption in Plasmonic Thin-Film Amorphous Silicon Solar Cell

Abstract

Improving the light absorption in thin-film solar cell is essential for enhancing efficiency and reducing cost. Here, we propose an ultra-broadband amorphous silicon solar cell based on a periodic array of titanium ring-shaped metasurfaces, which achieves more than 90% absorptance in the visible range of the solar spectrum. The surface plasmon resonance supported by the nanoparticles together with the resonance induced by the metal–insulator–metal Fabry–Perot cavity leads to this broadband absorption. The impact of various materials of functional layers and the geometric structure of the nanoparticle on absorption performance is discussed in detail, and super broadband resonance is achieved after optimization. Moreover, the optimized solar cell is tested for different solar incidence angles and it is found that the structure exhibits high absorption efficiency even at large angles. Thus, the proposed solar cell design may be beneficial for most of the photovoltaic applications.

Effect of aquatic and alcoholic extracts Nigella sativa seeds on liver and kidney functions and efficacy in the blood of males albino rats

“…Table (2) shows that the effect of the oral dose of black seed aqueous extract at concentrations of 50, 100 mg / g bw in the blood of male rats for 21 days, Resulted in a significant decrease (p˂0.05) in the values of urea, And a significant increase (p˂0.05) in the values of total protein, albumin and globulin increased the concentration of the water extract compared with the control group values. The reduction of urea was agreed with what he mentioned [18] When using the black bean extract at a concentration of 0.5mg for 25 days in the chicken chicks. The oral dose of black seed extract with concentrations of 50, 100 mg / g body weight in the blood of male rats for 21 days resulted in a significant decrease (p˂0.05) in urea values, And a significant increase (p˂0.05) in the values of total protein, albumin, and globulin increased concentration of the extract compared to the values of control group table (3).…”

Efficient broadband light absorption in thin-film a-Si solar cell based on double sided hybrid bi-metallic nanogratings

“…A key technique for obtaining good light trapping and enhancing the efficiency of solar cells is to engineer the light behavior by using photonic crystals, 4 diffraction gratings, 5 anti-reection coatings, 6 surface texturing, 7 and metallic nanoparticles. 3,8 Plasmonic nanogratings among other structures show a substantial progress as they can be used either as an innovative back reector patterned on a metal mirror [9][10][11][12] and/or on transparent and conductive oxides (TCO), [13][14][15][16] to improve both the optical path length and optical absorption over a broad spectrum. The effective coupling between metallic nanograting modes and the incident light essentially presents an efficient light trapping developing from surface plasmon resonances and their resultant near-eld light concentration.…”

Metamaterials and Metasurfaces: A Review from the Perspectives of Materials, Mechanisms and Advanced Metadevices

“…In the weak absorption spectral domain, solar cells of planar thin-film configuration can benefit from resonance of Fabry–Perot to perform more effectively [ 130 , 188 , 189 , 190 ]. Similarly, spectral width significantly reduces for a thicker solar cell and their number increases, both being disadvantageous.…”