Method of forming electrode, electrode manufactured therefrom and solar cell
A method of forming an electrode, an electrode for a solar cell manufactured, and a solar cell, the method including forming a pattern of a finger electrode by: coating a composition for forming a first electrode that includes a conductive powder, an organic vehicle, and a first glass frit that is free of silver and phosphorus, and drying the coated composition for forming a first electrode; forming a pattern of a bus electrode by: coating a composition for forming a second electrode that includes a conductive powder, an organic vehicle, and a second glass fit that includes silver and phosphorus, and drying the coated composition for forming a second electrode; and firing the resultant patterns.
1. A method of forming an electrode, the method comprising:
forming a pattern of a finger electrode by:
coating a composition for forming a first electrode that includes a conductive powder, an organic vehicle, and a first glass frit that is free of silver and phosphorus, and
drying the coated composition for forming a first electrode;
forming a pattern of a bus electrode by:
coating a composition for forming a second electrode that includes a conductive powder, an organic vehicle, and a second glass frit that includes silver and phosphorus, and
drying the coated composition for forming a second electrode; and
firing the resultant patterns.
2. The method of forming an electrode as claimed in claim 1 , wherein the composition for forming the first electrode includes:
about 60 wt % to about 95 wt % of the conductive powder,
about 0.5 wt % to about 20 wt % of the first glass fit, and
a balance amount of the organic vehicle.
3. The method of forming an electrode as claimed in claim 1 , wherein the composition for forming the second electrode includes:
about 60 wt % to about 95 wt % of the conductive powder,
about 0.5 wt % to about 20 wt % of the second glass fit, and
a balance amount of the organic vehicle.
4. The method of forming an electrode as claimed in claim 1 , wherein the second glass frit includes:
about 0.1 mol % to about 5 mol % of silver, and
about 0.1 mol % to about 3 mol % of phosphorus, all mol % being based on a total amount of the second glass frit.
5. The method of forming an electrode as claimed in claim 1 , wherein the second glass fit further includes tellurium and lithium.
6. The method of forming an electrode as claimed in claim 5 , wherein the second glass frit includes:
about 30 mol % to about 60 mol % of tellurium, and
about 3 mol % to about 20 mol % of lithium, all mol % being based on a total amount of the second glass frit.
7. The method of forming an electrode as claimed in claim 5 , wherein the second glass frit has a mole ratio of tellurium to lithium of about 80:20 to about 95:5.
8. The method of forming an electrode as claimed in claim 5 , wherein the second glass frit further includes bismuth, lead, or a combination thereof.
9. An electrode for a solar cell manufactured according to the method as claimed in claim 1 .
10. A solar cell comprising the electrode as claimed in claim 9 .