| 摘要 |
Provided is a photovoltaic (PV) module by which electric power generation efficiency can be improved by improving light use rate. An encapsulant (202) is permitted to be a first layer (A cover glass (201) and the encapsulant (202) are considered optically equivalent, since their refractive indexes are substantially the same), a light trapping film (300) to be a second layer, an anti-reflective layer (104) to be a third layer, and an n-type layer (103) to be a fourth layer. When the reflective indexes of the layers are expressed as first reflective index (n1), second reflective index (n2), third reflective index (n3) and fourth reflective index (n4), relationship n1<=n2<=n3<=n4 is satisfied. The light trapping film (300) of the second layer, i.e., one layer among the light transmitting layers, has a structured shape on an incident side (300a) where incident light (205) enters. |
