Fabrication and Study of Low Cost Large Area n type Black Nano grass Crystalline Silicon Solar Cells

Abstract

Texturization of diamond cut crystalline silicon wafers undergoes great difficulty due to deep saw marks all over the surface of the wafer which creates a hindrance to the manufacturing of high-efficiency solar cells. The textural result is not satisfactory by commercial texturization. Surface texturization of diamond cut silicon wafer has been improved after introducing a new method in our work. A small amount of surfactant, along with KOH-IPA solution and curtailing saw damage removal step created better textural result than conventional texturization method. Optimized etching solution exhibited excellent anisotropic etching, which eventually paved to improve solar cell characteristics in comparison to conventional surface texturing. newlineNext surface passivation has great importance to enhance silicon solar cell efficiency. The selection of proper passivation layers on n- and p-type c-Si is a challenging issue. Induced charges of dielectric layers are the predominant parameter to choose the proper passivation layer on n- and p-type silicon. In this work, a suitable choice of different dielectric layers on n-type c-Si Solar cells based on induced charge mechanism and ultimately the impact on the density of states of n-type c-Si Solar cells has been presented by numerical approach. The effect of induced charges of different dielectric layers is elucidated. In the end, Dit (density of states) and minority carrier lifetime (and#964;) have been calculated. Theoretical findings have been validated with experimental results. Solar cells were fabricated using different dielectric layers. The efficiency of the cells varied accordingly. Finally, a combo passivation layer was identified to obtain the best solar cell performance. newlineSilicon nanowire is a promising technology to reduce the reflectance considerably in solar cells. Vertically aligned silicon nanowires exhibit broadband optical absorption in the cell and provide newlinea very potential antireflective layer. It has been known that higher optical absorption leads to the enhance