Efficiency and Stability of MOS Solar Cells prepared by Anodization in DI water

In this thesis, we prepared the oxides of MOS solar cells by anodization technique. First, we investigated the effect of oxide thickness to the efficiency of the solar cells. It is hard to find out the oxide thickness by C-V curves due to the oxide thickness is too thin. Thus, we used the I-V curves to estimate the oxide thickness. We found that the conversion efficiency is higher when the oxide thickness is from 1.4nm to 1.6nm. In chapter 2, we also used the ITO film to replace the aluminum contact. It was expected to take the advantage of ITO with high-transmission of light to improve the efficiency of MOS solar cells. At the end of this chapter, we added a compressive stress to oxide during oxidation by anodization. Then, we investigated the effect of the compressive stress to the MOS solar cells.n chapter 3, we investigated the reliability of MOS solar cells. First, we measure the variation of the efficiency, short-circuit current, and the open-circuit voltage of MOS solar cells. We found that both of efficiency and open-circuit voltage and reduced. However, there was variation for difference in short-circuit current. In section 2, we investigated the reliability of MOS solar cells after NBTI stress. We found that there was slight increase of the short-circuit current, but the conversion efficiency, and the open-circuit voltage are decreased.t the end, we gave a conclusion for the properties and reliability of MOS solar cells. We found that the thinner the oxide thickness is, the higher the conversion efficiency would be. However, both of the replacement for aluminum contact with ITO film and the preparation of oxides by anodization with compressive stress cause the decrease of efficiency. In the reliability of MOS solar cells, as the illumination time is increased, the conversion efficiency and open-circuit voltage are decreased.