Solar cell and solar cell panel including the same

A solar cell panel comprising:

• a solar cell comprising a semiconductor substrate;
• an electrode formed on a first surface of the semiconductor substrate, the electrode comprising a plurality of finger lines formed to extend in a first direction while being parallel and six (6) or more bus electrodes formed to extend in a second direction crossing the first direction;
• and
• six (6) or more leads disposed on the bus electrodes, respectively,
• wherein each of the bus electrodes comprises a plurality of pad sections arranged to be spaced apart from one another in the second direction and a line section connecting the plurality of pad sections in the second direction wherein the line section has a smaller width than a width of the plurality of pad sections in the first direction,
• wherein the plurality of pad sections comprise:
• first pad sections having a length in the second direction greater than a width of any of the plurality of finger lines, wherein the first pad sections are disposed at opposite ends of the bus electrodes in the second direction, and
• second pad sections having a length in the second direction greater than the width of any of the plurality of finger lines, and wherein the second pad sections are disposed at an inside region of the bus electrode to be spaced apart from the first pad sections,
• wherein a first edge distance between one of the first pad sections and a first edge of the solar cell adjacent thereto is greater than a distance between a first outermost finger line of the plurality of finger lines and the first edge of the solar cell adjacent thereto,
• wherein a width in the first direction of the first pad sections is greater than a width in the first direction of the second pad sections or the length in the second direction of the first pad sections is greater than the length in the second direction of the second pad sections,
• wherein each of the leads has a width greater than a width of the line section,
• wherein each of the leads includes a first section disposed on the bus electrodes, and a second section that is connected to the first section, the second section including a bent portion that has an arc shape convex toward a front surface of the solar cell and that has a part extending from a connection point with the first section in a direction away from the solar cell, wherein the bent portion is spaced apart from the front surface of the solar cell in thickness direction;
• wherein each of the leads has a core and a solder coating layer on an outer surface of the core,
• wherein a width of the core is uniform and a width of the solder coating layer of a portion of the leads in contact with the plurality of pad sections is extended, so that the portion of the leads in contact with the plurality of pad sections has a width larger than a width of other portions of the leads,
• wherein the width of the solder coating layer of the portion of the leads in contact with the plurality of pad sections is equal to or smaller than the width of the plurality of pad sections, and
• wherein a first thickness of the solder coating layer of the portion of the leads in contact with the plurality of pad sections is greater between a first outer surface of the core and each pad section than a second thickness of the solder coating layer on a second outer surface of the core opposite the core from the first outer surface of the core.