The Study On Growth Of GaInP₂/GaAs/Ge Dual-junction Solar Cell And Processing Of Solar Concentrators

In the paper we mainly researched space GaInP2/GaAs/Ge high efficiency tandem cells' making process by home-made low pressure MOCVD technology and new solar concentrators.Firstly, we presented reseached and development of solar cells in China and foreign countries; Secondly, on the basis of fundamental priciples and theories, we discussed some factors of influcing conversion efficiency of solar cells, and analysed the I-V output feature of two-junction tandem cells; Then the design concept of GaInP2/GaAs/Ge two-junction tandem cells was discussed, the detailed aspects of GaInP2/GaAs/Ge tandem cells epitaxy growth by low pressure MOCVD was studied, and some questions on epitaxy growth (such as crystal qualities, interface stress, element interdiffusion, n- and p- type doping et all) were solved; After that, the cell fabrication process was described; Finally, we reseached the hot pressing and mould process technology of an arched line-focus Fresnel lens made by PMMA, designed and fixed new solar concentrators.The research work and the results of the research will provide valuable information to the continued studyof GaInP2/GaAs/Ge tandem cells and related devices.