| 摘要 |
A photovoltaic (PV) module in which electric power generation efficiency is enhanced by enhancing light utilization rate. A encapsulant (202) is a first layer, a wavelength conversion type light trapping film (300) is a second layer, an antireflection film (104) is a third layer and an n-type layer is a fourth layer. When the refractive indexed of the layers are expressed as first refractive index (n 1 ), second refractive index (n 2 ), third refractive index (n 3 ) and fourth refractive index (n 4 ), the following relation is satisfied; n 1 ‰¤ n 2 ‰¤ n 3 ‰¤ n 4 . The wavelength conversion type light trapping film (300) of the second layer has one structured surface on the light incident side and has a refractive index of 1.6-2.4. The wavelength conversion type light trapping film is transparent and contains a fluorescent substance. |
