Paste for solar cell electrode and solar cell
View Patent ↗In a paste for a solar cell light-receiving surface electrode including silver particles, glass frit, resin binder, and thinner, silver particles with a specific surface of 0.20-0.60 m 2 /g are used as the silver particles. The silver particles are preferably included at 80 mass % or more to the total amount of silver particles being included in the paste.
1. A method of producing a light-receiving surface electrode of a solar cell comprising the steps of:
applying a conductive paste on a silicon substrate; wherein the conductive paste comprises silver particles with a specific surface of 0.20-0.60 m 2 /g, and wherein the conductive paste further comprises glass frit, resin binder and thinner; and
firing the applied conductive the applied conductive paste.
2. A method of producing a light-receiving surface electrode of a solar cell of claim 1 , wherein firing temperature is 600-900 degree C. in the firing step.
3. A method of producing a light-receiving surface electrode of a solar cell of claim 1 , wherein firing time is 2-15 minutes in the firing step.
4. A method of producing a light-receiving surface electrode of a solar cell of claim 1 , wherein the above-mentioned silver particles are included at 80 mass % or more of the total amount of silver particles being included in the paste.
5. A method of producing a light-receiving surface electrode of a solar cell of claim 1 , wherein the specific surface of the silver particles is 0.25-0.50 m 2 /g.
6. A method of producing a light-receiving surface electrode of a solar cell of claim 1 , wherein the average particle diameter of the silver particles is 0.1-14 μm.
7. A method of producing a light-receiving surface electrode of a solar cell of claim 1 , wherein the average particle diameter of the silver particles is 2.0 μm.
8. A method of producing a light receiving surface electrode of a solar cell of claim 1 , wherein the content of the silver particles in the paste is 70-90 wt % upon the weight of the paste.
9. A method of producing a light receiving surface electrode of a solar cell of claim 1 , wherein the content of the glass frit is 0.5-10 wt % based upon the weight of the paste.
10. A method of producing a light receiving surface electrode of a solar cell of claim 1 , wherein the softening point of the glass frit is 450-550° C.