Paste composition for electrode and photovoltaic cell
The paste composition for an electrode are constituted with copper-containing particles having a peak temperature of an exothermic peak showing a maximum area in the simultaneous ThermoGravimetry/Differential Thermal Analysis of 280° C. or higher, glass particles, a solvent, and a resin. Further, the photovoltaic cell has an electrode formed by using the paste composition for a photovoltaic cell electrode.
1. A paste composition for an electrode, the paste composition comprising:
copper-containing particles having a peak temperature of an exothermic peak showing a maximum area in a simultaneous ThermoGravimetry/Differential Thermal Analysis of 280° C. or higher;
glass particles;
a solvent; and
a resin,
wherein the copper-containing particles are phosphorus-containing copper alloy particles and the content of phosphorus in the phosphorus-containing copper alloy particles is from 1% by mass to 8% by mass.
2. The paste composition for an electrode according to claim 1 , wherein the glass particles have a glass softening point of 600° C. or lower and a crystallization starting temperature of higher than 600° C.
3. The paste composition for an electrode according to claim 1 , wherein the glass particles comprise diphosphorus pentoxide-divanadium pentoxide-based glass.
4. The paste composition for an electrode according to claim 1 , further comprising silver particles.
5. The paste composition for an electrode according to claim 4 , wherein a content of the copper-containing particles is from 9% by mass to 88% by mass when a total amount of the copper-containing particles and the silver particles is taken as 100% by mass.
6. The paste composition for an electrode according to claim 5 , wherein:
a total content of the copper-containing particles and the silver particles is from 70% by mass to 94% by mass;
a content of the glass particles is from 0.1% by mass to 10% by mass; and
a total content of the solvent and the resin is from 3% by mass to 29.9% by mass.
7. The paste composition for an electrode according to claim 4 , wherein:
a total content of the copper-containing particles and the silver particles is from 70% by mass to 94% by mass;
a content of the glass particles is from 0.1% by mass to 10% by mass; and
a total content of the solvent and the resin is from 3% by mass to 29.9% by mass.
8. The paste composition for an electrode according to claim 1 , further comprising a phosphorus-containing compound.
9. The paste composition for an electrode according to claim 8 , wherein the phosphorous-containing compound is at least one selected from the group consisting of phosphoric acid, ammonium phosphate, phosphoric ester and cyclic phosphazene.
10. A photovoltaic cell having an electrode formed by sintering the paste composition for an electrode according to claim 1 which is provided to a silicon substrate.
11. The paste composition of claim 1 , wherein the copper alloy particles consist of copper and phosphorus.
12. A paste composition for an electrode, the paste composition comprising:
phosphorus-containing copper alloy particles;
glass particles;
a solvent; and
a resin,
wherein the content of phosphorus in the phosphorus-containing copper alloy particles is from 1% by mass to 8% by mass.
13. The paste composition of claim 12 , wherein the copper alloy particles consist of copper and phosphorus.
14. The paste composition for an electrode according to claim 12 , further comprising silver particles.
15. The paste composition for an electrode according to claim 14 , wherein a content of the copper-containing particles is from 9% by mass to 88% by mass when a total amount of the copper-containing particles and the silver particles is taken as 100% by mass.
16. The paste composition for an electrode according to claim 15 , wherein:
a total content of the copper-containing particles and the silver particles is from 70% by mass to 94% by mass;
a content of the glass particles is from 0.1% by mass to 10% by mass; and
a total content of the solvent and the resin is from 3% by mass to 29.9% by mass.
17. The paste composition for an electrode according to claim 14 , wherein:
a total content of the copper-containing particles and the silver particles is from 70% by mass to 94% by mass;
a content of the glass particles is from 0.1% by mass to 10% by mass; and
a total content of the solvent and the resin is from 3% by mass to 29.9% by mass.