Composition for forming solar cell electrode and electrode fabricated using the same
A composition for solar cell electrodes, a solar cell electrode, and a solar cell, the composition including silver powder; glass frit; an organic vehicle; and an epoxy group-containing silicon compound, wherein the glass frit includes bismuth and tellurium, and the organic vehicle includes a cellulose resin.
1. A composition for solar cell electrodes, the composition comprising:
silver powder;
glass frit;
an organic vehicle; and
an epoxy group-containing silicon compound,
wherein:
the glass frit includes bismuth and tellurium,
the organic vehicle includes a cellulose resin, and
the epoxy group-containing silicon compound is present in an amount of about 0.2 wt % to about 0.6 wt %, based on a total weight of the composition.
2. The composition for solar cell electrodes as claimed in claim 1 , wherein the cellulose resin includes hydroxy cellulose, methyl cellulose, ethyl cellulose, or nitrocellulose.
3. The composition for solar cell electrodes as claimed in claim 1 , wherein a weight ratio of the cellulose resin to the epoxy group-containing silicon compound is about 3:7 to about 8:2.
4. The composition for solar cell electrodes as claimed in claim 1 , wherein the glass frit further includes at least one of lithium and zinc.
5. The composition for solar cell electrodes as claimed in claim 1 , wherein the glass frit includes Bi—Te—Li—O glass frit, Bi—Te—Zn—O glass frit, or Bi—Te—Li—Zn—O glass frit.
6. The composition for solar cell electrodes as claimed in claim 1 , wherein the composition includes:
about 60 wt % to about 95 wt % of the silver powder;
about 0.1 wt % to about 20 wt % of the glass frit;
about 1 wt % to about 30 wt % of the organic vehicle; and
the about 0.2 wt % to about 0.6 wt % of the epoxy group-containing silicon compound, all wt % being based on a total weight of the composition.
7. The composition for solar cell electrodes as claimed in claim 1 , further comprising a dispersant, a thixotropic agent, a plasticizer, a viscosity stabilizer, an anti-foaming agent, a pigment, a UV stabilizer, an antioxidant, or a coupling agent.
8. A solar cell electrode prepared from the composition for solar cell electrodes as claimed in claim 1 .
9. A solar cell including the solar cell electrode as claimed in claim 8 .