LIGHT EXTRACTION LAYER FORMING GLASS, AND LIGHT EXTRACTION LAYER FORMING GLASS POWDER, METHOD FOR FORMING LIGHT EXTRACTION LAYER, MATERIAL FOR FORMING LIGHT EXTRACTION LAYER, GLASS PASTE FOR FORMING LIGHT EXTRACTION LAYER, GLASS SUBSTRATE FOR ORGANIC EL ELEMENT, ORGANIC EL ELEMENT AND METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR ORGANIC EL ELEMENT WHICH USE SAME

摘要

Provided are a light extraction layer forming glass with which a light extraction layer exhibiting high light extraction efficiency can be formed at a low cost and a glass substrate for an organic EL element using the same. A light extraction layer is formed by using glass having a refraction index nd of 1.80 to 2.20 and, in molar%, 0.1% or more of ZrO2 and an Nb2O5 content of 15% or less, more preferably by using glass comprising, in molar%, 20 to 35% of Bi2O3, 20 to 35% of B2O3, greater than 5% and less than or equal to 35% of SiO2, 0 to 10% of Al2O3, 0 to 10% of ZnO and 1 to 8% of ZrO2.