Study of Double Layered Antireflection Coating Covered on Triple-Junctions Ⅲ-Ⅴ Solar Cell

• Main Authors: Chun-Chien Cheng, 鄭竣謙
• Other Authors: Tsai-Hsing Lai
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/31575128362974231313

碩士 === 中原大學 === 應用物理研究所 === 94 === The reflectance on the device surface influences greatly the energy conversion efficiency of a solar cell and should be considered as an important role concerned with the practical use of the solar cells. In this study, we frist used the simulation software Film Star to design the TiO2/Al2O3 double-layered antireflection coating and the TiO2/SiO2 double-layered antireflection coating. Then, via the current-voltage characteristics and the spectral response measurements,we investigated the effect of the TiO2/Al2O3 double-layered antireflection coating and the TiO2/SiO2 double-layered antireflection coating on the performance of the solar cells, and compared the corresponding properties with the Si3N4 single-layered antireflection coating. Our results showed that, solar cells with double-layered antireflection coating have improved both the short-circuit current and the energy conversion efficiency of our triple-junction Ⅲ-Ⅴsolar cells. The short-circuit current has been improved by 32% , and the best energy conversion efficiency of 24% can also be achieved. In this study, we also conducted the experiments of the ohmic contacts on the solar cells. The result of our Ni/Au/Ag ohmic contact on the germanium substrate showed that, for annealing temperature of 350℃, annealing time of 20 second, the lowest specific contact resistance, with the value of 3.76×10-5Ω-cm2, had been abtained.