Patent ID: 8829341

Claim:
A solar cell comprising: a substrate; a rear electrode layer disposed on the substrate; a light absorption layer disposed on the rear electrode layer; and a window layer disposed on the light absorption layer, wherein the window layer comprises: a first transparent conductive layer on the light absorption layer; a nano-particle layer on the first transparent conductive layer; and a second transparent conductive layer on the nano-particle layer; wherein the nano-particle layer comprises: conductive particles; and a host surrounding the conductive particles; wherein a thickness of the nano-particle layer is in a range of 25 nm to 70 nm, wherein a thickness of the first transparent conductive layer is in a range of 20% to 80% of a thickness of the window layer, and wherein a thickness of the second transparent conductive layer is in a range of 20% to 80% of the thickness of the window layer.