SOLAR CELL AND SOLAR CELL MODULE
A photoelectric converter generates carriers by photoelectric conversion. A multiple finger electrodes are electrically coupled to the photoelectric converter. The finger electrodes collect carriers generated in the photoelectric converter. The finger electrodes contain a sintering conductive material as an essential ingredient. A bus-bar electrode is electrically coupled to the multiple finger electrodes. The bus-bar electrode collects the carriers from the finger electrodes. The bus-bar electrode contains a thermosetting conductive material as an essential ingredient.
1 . A solar cell comprising:
a photoelectric converter configured to generate carriers by photoelectric conversion;
a plurality of finger electrodes electrically coupled to the photoelectric converter and configured to collect carriers generated in the photoelectric converter, the finger electrodes comprising a sintering conductive material as an essential ingredient; and
a bus-bar electrode electrically coupled to the plurality of finger electrodes and configured to collect the carriers from the finger electrodes, the bus-bar electrode comprising a thermosetting conductive material as an essential ingredient.
2 . The solar cell of claim 1 , wherein the sintering conductive material is ceramic paste.
3 . The solar cell of claim 1 , wherein the sintering conductive material comprises silver paste containing silver powder, glass frit, an organic vehicle, and an organic solvent.
4 . The solar cell of claim 1 , wherein the thermosetting conductive material comprises resin paste with thermosetting resin binder.
5 . The solar cell of claim 1 , wherein the thermosetting conductive material comprises silver paste prepared by dispersing silver grains into an epoxy-based thermosetting resin solution.
6 . A solar cell module comprising:
at least two solar cells, each comprising:
a photoelectric converter configured to generate carriers by photoelectric conversion;
a plurality of finger electrodes electrically coupled to the photoelectric converter and configured to collect carriers generated in the photoelectric converter, the finger electrodes comprising a sintering conductive material as an essential ingredient; and
a bus-bar electrode electrically coupled to the plurality of finger electrodes and configured to collect the carriers from the finger electrodes, the bus-bar electrode comprising a thermosetting conductive material as an essential ingredient;
a tab configured to electrically interconnect the solar cells by electrically connecting the bus-bar electrodes to one another;
an acceptance surface protector provided on an acceptance surface side of the solar cells; and
a back surface protector provided on a back surface side of the solar cells.
7 . The solar cell module of claim 6 , further comprising a conductive adhesive layer formed on the bus-bar electrode, the conductive adhesive layer comprising a resin of conductive particles,
wherein the tab is electrically coupled to the bus-bar electrode through the conductive adhesive layer.