Multiple junction solar cell

A multiple junction solar cell, comprising:

• a first solar cell unit, configured to absorb light waves with a wavelength of 660 nm or below and convert the light waves into electrical energy;
• a second solar cell unit, connected to a first lower surface of the first solar cell unit through a first tunneling junction, and configured to absorb light waves with a wavelength of 600 nm to 900 nm and convert the light waves into electrical energy;
• a third solar cell unit, connected to a second lower surface of the second solar cell unit through a second tunneling junction, and configured to absorb light waves with a wavelength of 900 nm or above and convert the light waves into electrical energy;
• a first anti-reflective coating, on a first upper surface of the first solar cell unit, made of titanium dioxide, and having a thickness of 45 nm to 75 nm;
• a second anti-reflective coating, on the first anti-reflective coating, made of aluminum oxide, and having a thickness of 65 nm to 110 nm;
• an optical adhesive layer, on the second anti-reflective coating, and having a refractive index of 1.52 to 1.58;
• a protective glass, on the optical adhesive layer, and having a refractive index of 1.46 to 1.54 and less than that of the optical adhesive layer;
• and
• a tantalum silicon oxide anti-reflective laminate, comprising at least a first tantalum silicon oxide stacked layer and a second tantalum silicon oxide stacked layer, the first tantalum silicon oxide stacked layer being on the protective glass, the second tantalum silicon oxide stacked layer being on the first tantalum silicon oxide stacked layer, and the tantalum silicon oxide anti-reflective laminate having a thickness of less than 750 nm;
• wherein the multiple junction solar cell has a reflectance of less than 6.5% for the light waves with the wavelength of 600 nm to 900 nm.