Glass compositions and glass frit composites for use in optical applications

A method of making a light emitting diode package comprising:

• sintering a glass frit composite to form a phosphor-containing layer comprising phosphor dispersed in a glass matrix, and
• positioning the phosphor-containing layer such that light from a light emitting diode is transmitted through the phosphor-containing layer,
• wherein the glass frit composite includes glass frit formed by firing a mixture comprising:
• about 20-60 mole % SiO2,
• about 15.8-50 mole % ZnO, and
• about 3-28 mole % B2O3.

A method of making a light emitting diode package comprising:

• sintering a glass frit composite to form a phosphor-containing layer comprising phosphor dispersed in a glass matrix, and
• positioning the phosphor-containing layer such that light from a light emitting diode is transmitted through the phosphor-containing layer,
• wherein the glass frit composite includes glass frit formed by firing a mixture comprising:
• about 20-60 mole % SiO2,
• about 14-50 mole % ZnO, and
• about 3-28 mole % B2O3,
• wherein the glass frit composite contains intentionally added seed material for precipitating phosphor crystals during sintering.