Patent ID: 7479596
Filing Date: 2009-01-20
Classification: H01L,Y02E,Y02P

Abstract:
1. A solar cell comprising a first electrode layer, a second electrode layer, a p-type semiconductor layer disposed between the first electrode layer and the second electrode layer, and a layer A disposed between the second electrode layer and the p-type semiconductor layer, wherein the layer A comprises Zn, Mg, O, and at least one element M selected from Ca, Sr, Ba, Al, In, and Ga; wherein a content of the element M in the layer A is in the range of 0.01 to 3 atom percent; wherein a ratio of atom numbers between Zn, Mg, and O comprised in the layer A satisfies an expression Zn:Mg:O=(1−x):x:1, where x is a numerical value that satisfies an expression 0.05≦×≦0.35; and wherein a photoelectromotive force is generated due to light that is incident from the second electrode layer side.