Solar cell panel and method for manufacturing the same
Disclosed is a solar cell including: a solar cell including an electrode; a wiring portion electrically connected to the electrode of the solar cell; a connection member positioned between the electrode and the wiring portion at a connection portion of the electrode and the wiring portion to electrically connect the electrode and the wiring portion; and an insulating layer covering the electrode entirely where the connection member is not positioned to insulate the electrode and the wiring portion at a portion other than the connection portion. The insulating layer includes an organic solderability preservative (OSP).
1. A method for manufacturing a solar cell panel, the method comprising:
forming an insulating layer on an electrode of a solar cell;
forming a connection member on the insulating layer to correspond to a connection portion on which the electrode and a wiring portion are to be connected;
performing a heat-treatment on the connection member so as to penetrate through the insulating layer and to be connected to the electrode at the connection portion; and
attaching the wiring portion on the electrode at the connection portion through the connection member.
2. The method according to claim 1 , wherein the insulating layer comprises an organic solderability preservative (OSP), and
wherein the connection member comprises a solder material.
3. The method according to claim 2 , wherein, in the forming of the connection member, a flux for removing the insulating layer or assisting a removal of the insulating layer is positioned adjacent to the insulating layer.
4. The method according to claim 1 , further comprising:
annealing for increasing an adhesion property of the electrode of the solar cell between the forming of the insulating layer and the forming of the connection member.
5. The method according to claim 1 , wherein the insulating layer is formed on an entire portion of the electrode except for a portion where the connection member is formed, after the performing of the heat-treatment.
6. The method according to claim 5 , wherein the connection member comprises a plurality of connection members, each having an island shape to correspond to the connection portion, at the electrode, and
wherein the insulating layer is entirely formed on the electrode except for a portion where the plurality of connection members are positioned, after the performing of the heat-treatment.
7. The method according to claim 1 , wherein a thickness of the insulating layer is equal to or less than a thickness of the connection member.
8. The method according to claim 7 , wherein the thickness of the insulating layer is approximately 10 um or more, and
wherein the thickness of the connection member is approximately 30 um to 70 um.
9. The method according to claim 1 , wherein the forming of the insulating layer is performed by a spraying process, a dispensing process, or a spin coating process, and
wherein the forming of the connection member is performed by a printing process.
10. The method according to claim 2 , wherein the performing of the heat-treatment is a reflow process for melting the solder material of the connection member.
11. The method according to claim 10 , wherein the performing of the heat-treatment is performed at a temperature of approximately 200 to 300° C.
12. The method according to claim 1 , wherein the electrode comprises a nickel-vanadium alloy layer, and
wherein the connection member comprises an acidic material.