| With the major boost of the solar cell, it is significant to improve the conversation rate of solar cell. In order to enhance the local resonance field, metal nanoparticles are added to produce the surface plasmon palorition. Therefore, the cross section will increase before the resonance and the path which the inner light of the solar cell pass will raise. In the end,as the increasing absorption of active medium, the origin target that enhancing the light absorption of the solar cell will be achieved.The design structure of this thesis is using the single crystal silicon as the basement and putting the hemispherical Ag nanoparticles on the front side of the solar cell. Moreover, the Finite – Difference Time – Domain(FDTD) is applied to the simulation experiment of the light absorption development. In this design, some proxy such as the diameter of the nanoparticles, the thickness of passivation layer and the incidence angle of light will be changed for observing their effect to the light absorption development. After the simulation experiment, the following conclusions are reached. Firstly, when using 800 nanometers as the silicon basement, 100 nanometers as the height of nanoparticles, 400 nanometers as the diameter of nanoparticles and the inverse ratio of floor space and square area is 0.835 in the unit period of nanoparticles, the light absorption rate is highest and development is 1.862. Secondly, SiO2 passivation layer is added between the silicon basement and the Ag nanoparticles. In this way, it is easy to observe that the light to development has different influence when the thickness of passivation layer changed. When using 450 nanometers as the silicon basement, 90 nanometers as the height of nanoparticles, 90 nanometers as the diameter of nanoparticles and the inverse ratio of floor space and square area is 0.5 in the unit period of nanoparticles, the light absorption rate is highest and development is 1.616. |
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