Composition for forming solar cell electrode and solar cell electrode prepared using the same
A composition for solar cell electrodes, a solar cell electrode, and a method of manufacturing a solar cell, the composition including a conductive powder; a glass frit; and an organic vehicle, wherein the conductive powder includes a first silver powder having a cross-sectional particle porosity of about 0.1% to about 6%.
1. A composition for solar cell electrodes, the composition comprising:
a conductive powder;
a glass frit; and
an organic vehicle, wherein the conductive powder includes a first silver powder having a cross-sectional particle porosity of 0.1% to 4%;
wherein the conductive powder further includes a second silver powder that is different from the first silver powder; and
wherein: the first silver powder is present in an amount of about 30 wt % to about 95 wt %, and the second silver powder is present in an amount of about 5 wt % to about 70 wt %, all wt % being based on a total weight of the conductive powder.
2. The composition as claimed in claim 1 , wherein the first silver powder has an average particle diameter of about 0.5 μm to about 3.5 μm.
3. The composition as claimed in claim 1 , wherein the first silver powder has an average pore size of about 10 nm to about 300 nm.
4. The composition as claimed in claim 1 , wherein the composition includes:
about 60 wt % to about 95 wt % of the conductive powder;
about 0.1 wt % to about 20 wt % of the glass frit; and
about 1 wt % to about 30 wt % of the organic vehicle, all wt % being based on a total weight of the composition.
5. A solar cell electrode formed from the composition for solar cell electrodes as claimed in claim 1 .
6. The solar cell electrode as claimed in claim 5 , wherein the first silver powder has an average particle diameter of about 0.5 μm to about 3.5 μm.
7. The solar cell electrode as claimed in claim 5 , wherein the first silver powder has an average pore size of about 10 nm to about 300 nm.
8. The solar cell electrode as claimed in claim 5 , wherein the composition includes:
about 60 wt % to about 95 wt % of the conductive powder;
about 0.1 wt % to about 20 wt % of the glass frit; and
about 1 wt % to about 30 wt % of the organic vehicle, all wt % being based on a total weight of the composition.
9. The solar cell electrode as claimed in claim 5 , wherein the solar cell electrode is prepared by:
applying the composition for solar cell electrodes onto a substrate; and
baking the substrate having the composition thereon.
10. A method of manufacturing a solar cell, the method comprising:
applying the composition for solar cell electrodes as claimed in claim 1 onto a substrate; and
baking the substrate having the composition thereon.
11. A composition for solar cell electrodes, the composition comprising: a conductive powder;
a glass frit; and
an organic vehicle,
wherein the conductive powder includes:
a first silver powder having a cross-sectional particle porosity of about 0.1% to about 6%, and
a second silver powder different from the first silver powder and having a cross-sectional particle porosity of less than 0.1%.
12. The composition as claimed in claim 11 , wherein the first silver powder has a cross-sectional particle porosity of 0.1% to less than 5%.
13. The composition as claimed in claim 11 , wherein the first silver powder has a cross-sectional particle porosity of 0.1% to 4%.