Composition for solar cell electrodes and electrode fabricated using the same

摘要

A composition for solar cell electrodes includes a conductive powder, a glass frit, an organic vehicle and a thixotropic agent, and has a first thixotropic index (TI I) of about 1.5 to about 4 as represented by the following Equation 1, and a second thixotropic index (TI II) of about 4 to about 8 as represented by the following Equation 2, both the first thixotropic index and the second thixotropic index being measured at 23° C. by a rotary viscometer. [Equation 1] TI I=(viscosity at 1 rpm/viscosity at 10 rpm) [Equation 2] TI II=(viscosity at 10 rpm/viscosity at 100 rpm).

主权项

1. A composition for a solar cell electrode, the composition comprising:
a conductive powder; a glass frit; an organic vehicle; and a thixotropic agent, wherein the organic vehicle and the thixotropic agent, and amounts thereof, are selected such that the composition has a first thixotropic index (TI I) of 1.5 to 2 as represented by the following Equation 1, and a second thixotropic index (TI II) of about 4 to about 8 as represented by the following Equation 2, such that the first thixotropic index is lower than the second thixotropic index, both the first thixotropic index and the second thixotropic index being measured at 23° C. by a rotary viscometer
TI I =(viscosity at 1 rpm/viscosity at 10 rpm)  [Equation 1]TI II =(viscosity at 10 rpm/viscosity at 100 rpm)  [Equation 2].