| 摘要 |
PROBLEM TO BE SOLVED: To provide a back junction type solar battery capable of enhancing the photoelectric conversion efficiency.SOLUTION: A solar battery has a first semiconductor layer 3, a second semiconductor layer 5 and an insulation layer 4 disposed between the first and second semiconductor layers 3 and 5. The first semiconductor layer 3 has a first region in which the first semiconductor layer 3 is joined to a semiconductor substrate 2, a second region in which the second semiconductor layer 5 is joined to the semiconductor substrate 2, and a third region in which the insulation layer 4 is provided. The first region has plural first finger portions extending in a y-direction, and a first bus bar portion for connecting one ends of the plural first finger portions. The second region has plural second finger portions extending in the y-direction, and a second bus bar portion for connecting one ends of the plural second finger portions. The first finger portions and the second finger portions are interleaved with each other, and the third region is located in an area where the first semiconductor layer 3 and the second semiconductor layer 5 are overlapped with each other in the first finger portion, and also located at the first bus bar portion.SELECTED DRAWING: Figure 2 |
