Method for manufacturing solar cell module provided with an edge space
The solar cell module having a preferable edge space that prevents characteristics of a solar cell such as conversion efficiency from being deteriorated without making processes complicated is provided. In a method for manufacturing a solar cell module including a substrate glass, a first layer formed on the substrate glass and a second layer formed on the first layer, the method includes a step of forming a first edge space having a first width by removing the first layer and the second layer by the first width from an end part of the glass substrate and a step of forming a second edge space by removing only the second layer by a second width from the end part of the glass substrate, and the width of the second edge space is larger than the width of the first edge space.
1. A method for manufacturing a solar cell module comprising a glass substrate, a first layer formed on the glass substrate and a second layer formed on the first layer, the method comprising:
a step of forming a second edge space having a second width by removing only the second layer by the second width from an end part of the glass substrate; and
a step of forming a first edge space having a first width by removing the first layer by the first width from an end part of the glass substrate,
wherein
the first layer is harder than the second layer,
the width of the second edge space is larger than the width of the first edge space,
the second layer is divided into a plurality of cells by a plurality of division grooves that divide the second layer,
the first edge space is formed on a peripheral edge of the glass substrate such that a length-wise direction of the first edge space runs parallel to the entire peripheral edge of the glass substrate so as to be perpendicular to the division grooves,
the second edge space is formed on the peripheral edge of the glass substrate such that a length-wise direction of the second edge space runs parallel to the entire peripheral edge of the glass substrate,
the second edge space is perpendicular to the division grooves and intersects the division grooves,
the step of forming the first edge space is carried out after the step of forming the second edge space,
the plurality of division grooves that divide the second layer are formed prior to the steps of forming the first and second edge spaces, and
a top surface and a side surface of the glass substrate form the peripheral edge of the glass substrate.
2. A method for manufacturing a solar cell module according to claim 1 , wherein the width of the first edge space is 10 mm or more, and the width of the second edge space is larger by 0.1 mm or more than the width of the first edge space.
3. A method for manufacturing a solar cell module according to claim 1 , wherein the first layer comprises a first electrode including molybdenum.
4. A method for manufacturing a solar cell module according to claim 1 , wherein the second layer comprises:
a CIS layer formed on the first layer;
a buffer layer formed on the CIS layer; and
a second electrode layer formed on the buffer layer.
5. A method for manufacturing a solar cell module according to claim 1 , wherein the step of forming the second edge space is carried out by removing the second layer by using a second laser.
6. A method for manufacturing a solar cell module according to claim 1 , wherein the step of forming the second edge space is carried out by removing the second layer by using a mechanical scribe.
7. A method for manufacturing a solar cell module according to claim 1 , wherein the step of forming the first edge space is carried out by removing the first layer by using a first laser.
8. A method for manufacturing a solar cell module according to claim 1 , wherein the step of forming the first edge space is carried out by removing the first layer by using a sandblaster.