Experimental Investigation Of Solar Cells Based On The Surface Laminated Structure Of Aao Nano - Grating

Due to the relatively high conversion efficiency and lower costs of polycrystalline silicon solar cell, it has become a hot issue in recent years. However, due to the polycrystalline silicon solar cells reflective more surface light, so that silicon absorbs light significantly reduced, and therefore need to design a surface light trapping structure to reduced the surface reflective, to increase the absorption of light. AAO is a periodic nanograting structure, and it had been widely used in the fabrication of ordered nanostructures for their highly ordered nanopore array structure. But recently, it shows a high application potential on light trapping of solar cells.In this paper, a new type of light trapping structure of AAO on the surface is proposed. Our main exploration include:(1) Analysis the light trapping mechanism of AAO in different position. Study the relationship between AAO parameters and solar cell’s light absorption characters with the help of FDTD Solution software. Discuss the influence of AAO’s fabrication error on light trapping. Then optimize the AAO parameters by Simulation. Simulation results show that, the optimum parameters of surface AAO is 90nm for diameter, 200nm for thickness and 100nm for distance.(2) Using two anodizing method prepared different diameter, pore distance and thickness AAO nanograting. By texturing, diffusion, wet etching step, PECVD prepared a thickness of 180um polycrystalline silicon solar cell, and the AAO nanostructures with different parameters adsorbed on the cell surface, the performance of photovoltaic cells were analyzed.(3) The experimental results and FDTD software simulation results, and verify that the surface of the AAO nano-grating light trapping effect.