Solar cell, solar cell module and photovoltaic system

The utility model is suitable for the technical field of solar cells, and provides a solar cell, a solar cell module and a photovoltaic system. The solar cell comprises a cell substrate, an aluminum oxide layer, a first silicon oxide layer, a silicon nitride layer and a second silicon oxide layer which are sequentially stacked, and the thickness of the aluminum oxide layer ranges from 5 nm to 15 nm. The thickness of the first silicon oxide layer ranges from 1nm to 8nm; the thickness of the silicon nitride layer ranges from 30 nm to 50 nm; the thickness of the second silicon dioxide layer ranges from 50 nm to 100 nm. Therefore, the reflectivity of the solar cell is reduced, and the photoelectric conversion efficiency of the solar cell is improved. 本实用新型适用于太阳能电池技术领域，提供了一种太阳能电池、太阳能电池组件和光伏系统。太阳能电池包括依次层叠设置的电池基片、氧化铝层、第一氧化硅层、氮化硅层和第二氧化硅层，氧化铝层的厚度范围为5nm-15nm；第一氧化硅层的厚度范围为1nm-8nm；氮化硅层的厚度范围为30nm-50nm；第二氧化硅层的厚度范围为50nm-100nm。如此，使得太阳能电池的反射率降低，有利于提高太阳能电池的光电转换效率。