Thin film-type solar cell

1 . A thin film type solar cell comprising:

a plurality of unit cells serially connected to one another on a substrate, the plurality of unit cells including a plurality of front electrodes, a plurality of semiconductor layers on the plurality of front electrodes, and a plurality of rear electrodes on the plurality of semiconductor layers;

a light transmission part provided in the plurality of unit cells; and

a plurality of separation parts including a first separation part, a second separation part and a third separation part, the plurality of separation parts arranged on the substrate to separate the plurality of unit cells and intersecting with the light transmission part, wherein the first separation part, the second separation part and the third separation part are provided between the plurality of front electrodes or between the plurality of rear electrodes,

wherein the light transmission part is provided in a discontinuous rectilinear structure including at least one disconnection part,

wherein the light transmission part comprises a first light transmission part and a second light transmission part which are apart from each other in a first direction and are parallel to each other,

wherein the first light transmission part comprises a first continuous area, a second continuous area, a third continuous area, a first disconnection part between the first continuous area and the second continuous area, and a second disconnection part between the second continuous area and the third continuous area, and

wherein the second light transmission part comprises a first continuous area, a second continuous area, a third continuous area, a first disconnection part between the first continuous area and the second continuous area, and a second disconnection part between the second continuous area and the third continuous area,

wherein the first separation part, the second separation part and the third separation part are arranged in the first direction, and the first light transmission part and the second light transmission part are arranged in a second direction different from the first direction,

wherein the first continuous area, the second continuous area, the third to sixth continuous area of the first light transmission part and the second light transmission parts intersect with any one of the first separation part, second separation part and to third separation parts while contacting any one of the first separation part, the second separation part and the third separation parts, and

the first disconnection part and second disconnection part of each of the first light transmission part and the second light transmission part are separated from the first separation part, the second separation part and the third separation part by the one or more of the first continuous area, the second continuous area, and the third continuous area of the first light transmission part and the second light transmission part,

wherein the first disconnection part of the first light transmission part and the first disconnection part of the second light transmission part are provided between the first separation part and the second separation part, and the second disconnection part of the first light transmission part and the second disconnection part of the second light transmission part are provided between the second separation part and the third separation part,

wherein a plurality of dot patterns overlaps one another in the first continuous area, the second continuous area and the third continuous area of the first light transmission, and number of the plurality of dot patterns differs in at least two continuous areas among the first continuous area, the second continuous area, and the third continuous area,

wherein the first separation part, the second separation part, the first light transmission part and the second light transmission part define a first active area, and the second separation part, the third separation part, the first light transmission part and the second light transmission part define a second active area adjacent to the first active area, and

wherein the first disconnection part of each of the first light transmission part and the second light transmission part is provided at a boundary of the first active area, and the second disconnection part of each of the first light transmission part and second light transmission part is provided at a boundary of the second active area.

2 . The thin film type solar cell of claim 1 , wherein the number of the plurality of dot patterns in the first continuous area, the number of the plurality of dot patterns in the second continuous area, and the number of the plurality of dot patterns in the third continuous area of each of the first light transmission part and the second light transmission part are different from one another.

3 . The thin film type solar cell of claim 1 , wherein a pattern of the first light transmission part differs from a pattern of the second light transmission part.

4 . The thin film type solar cell of claim 1 , wherein the first continuous area, the second continuous area, the third continuous area, the first disconnection part and the second disconnection part of each of the first light transmission part and the second light transmission part, are provided in a straight line in a second direction, and the second direction is perpendicular to the first direction.

5 . The thin film type solar cell of claim 1 , wherein

the first disconnection part and the second disconnection part of the second light transmission part are provided not to overlap the first disconnection part or the second disconnection part of the first light transmission part.

6 . The thin film type solar cell of claim 1 , wherein the first disconnection part of the first light transmission part and the second disconnection part of the second light transmission part are provided asymmetrically.

7 . The thin film type solar cell of claim 1 , wherein

the plurality of front electrodes, the plurality of semiconductor layers, and the plurality of rear second electrodes are provided on the substrate, and

each light transmission part is provided in a structure where a certain area of a respective semiconductor layer and second electrode are removed.

8 . The thin film type solar cell of claim 1 , wherein a length of the first disconnection part of each of the first light transmission part and the second light transmission part differs from a length of the second disconnection part of each of the first light transmission part and the second light transmission part.