Paste composition for solar battery electrode
View Patent ↗It is provided a paste composition for a solar battery electrode, that includes electrically conductive powder, glass frit, and a vehicle, wherein the glass frit is made of glass that comprises, as amounts converted into those of oxides as ratios, Li 2 O within a range from 0.6 to 18 [mol %], PbO within a range from 20 to 65 [mol %], B 2 O 3 within a range from 1 to 18 [mol %], and SiO 2 within a range from 20 to 65 [mol %].
1. A paste composition for a solar battery electrode, that comprises electrically conductive powder, glass frit, and a vehicle, wherein:
the glass frit is made of glass that comprises, as amounts converted into those of oxides as ratios, Li 2 O within a range from 0.6 to 18 mol %, PbO within a range from 30 to 65 mol %, B 2 O 3 within a range from 1 to 18 mol %, and SiO 2 within a range from 20 to 65 mol %.
2. The paste composition for a solar battery electrode of claim 1 , wherein:
the glass frit has an average particle diameter (D50) within a range from 0.3 to 3.0 μm, and
the paste comprises the glass frit at a ratio within a range from 1 to 20 vol to a whole amount of the paste.
3. The paste composition for a solar battery electrode of claim 2 , wherein the electrically conductive powder is silver powder that has an average particle diameter (D50) within a range from 0.3 to 3.0 μm.
4. The paste composition for a solar battery electrode of claim 3 , wherein the silver powder is powder that has a ball shape or a scale shape.
5. The paste composition for a solar battery electrode of claim 4 , wherein:
a viscosity of the paste composition at 25° C. and 20 rpm is within a range from 150 to 250 Pa s, and
a relative viscosity is 3 to 8, that is a value acquired by dividing a viscosity at 10 rpm by a viscosity at 100 rpm.
6. The paste composition for a solar batter electrode of claim 5 , wherein:
the viscosity is within a range from 160 to 200 Pa s, and
the relative viscosity is 3.2 to 6,0.
7. The paste composition for a solar battery electrode of claim 3 , wherein:
a viscosity of the paste composition at 25° C. and 20 rpm is within a range from 150 to 250 Pa s, and
a relative viscosity is 3to 8, that is a value acquired by dividing a viscosity at 10 rpm by a viscosity at 100 rpm.
8. The paste composition for a solar battery electrode of claim 7 , wherein:
the viscosity is within a range from 160 to 200 Pa s, and
the relative viscosity is 3.2 to 6.0.
9. The paste composition for a solar battery electrode of claim 2 , wherein:
a viscosity of the paste composition at 25° C. and 20 rpm is within a range from 150 to 250 Pa s, and
a relative viscosity is 3 to 8, that is a value acquired by dividing a viscosity at 10 rpm by a viscosity at 100 rpm.
10. The paste composition for a solar battery electrode of claim 9 , wherein:
the viscosity is within a range from 160 to 200 Pa s, and
the relative viscosity is 3.2 to 6.0.
11. The paste composition for a solar battery electrode of claim 1 , wherein the electrically conductive powder is silver powder that has an average particle diameter (D50) within a range from 0.3 to 3.0 μm.
12. The paste composition for a solar battery electrode of claim 11 , wherein the silver powder is powder that has a ball shape or a scale shape.
13. The paste composition for a solar battery electrode of claim 12 , wherein:
a viscosity of the paste composition at 25° C. and 20 rpm is within a range from 150 to 250 Pa s, and
a relative viscosity is 3 to 8, that is a value acquired by dividing a viscosity at 10 rpm by a viscosity at 100 rpm.
14. The paste composition for a solar battery electrode of claim 13 , wherein:
the viscosity is within a range from 160 to 200 Pa s, and
the relative viscosity is 3.2 to 6.0.
15. The paste composition for a solar battery electrode of claim 11 , wherein:
a viscosity of the paste composition at 25° C. and 20 rpm is within a range from 150 to 250 Pa s, and
a relative viscosity is 3 to 8, that is a value acquired by dividing a viscosity at 10 rpm by a viscosity at 100 rpm.
16. The paste composition for a solar battery electrode of claim 15 , wherein:
the viscosity is within a range from 160 to 200 Pa s, and
the relative viscosity is 3.2 to 6.0.
17. The paste composition for a solar battery electrode of claim 1 , wherein:
a viscosity of the paste composition at 25° C. and 20 rpm is within a range from 150 to 250 Pa s, and
a relative viscosity is 3 to 8, that is a value acquired by dividing a viscosity at 10 rpm by a viscosity at 100 rpm.
18. The paste composition for a solar battery electrode of claim 17 , wherein:
the viscosity is within a range from 160 to 200 Pa s, and
the relative viscosity is 3.2 to 6.0.