Glass for diffusion layer in organic LED element, and organic LED element utilizing same
View Patent ↗The present invention relates to a glass for a scattering layer of an organic LED element, which contains, in terms of mol % on the basis of oxides, 0˜20% of P 2 O 5 , 15˜60% of B 2 O 3 , 15˜28% of Bi 2 O 3 and 20˜50% of ZnO, in which a value obtained by dividing the content of P 2 O 5 by the content of ZnO is less than 0.48, the sum of the contents of P 2 O 5 and B 2 O 3 is 30˜60%, the content of P 2 O 5 is 10% or less when the sum of the contents of P 2 O 5 and B 2 O 3 exceeds 50%, and the glass does not substantially contain lead (PbO or Pb 3 O 4 ), Li 2 O, Na 2 O and K 2 O, except for those contained as impurities.
1. A glass for a scattering layer of an organic LED element, which contains, in terms of mol % on the basis of oxides, 0˜20% of P 2 O 5 , 15˜60% of B 2 O 3 , 15˜28% of Bi 2 O 3 and 20˜50% of ZnO,
wherein a value obtained by dividing the content of P 2 O 5 by the content of ZnO is less than 0.48,
the sum of the contents of P 2 O 5 and B 2 O 3 is 30˜60%,
the content of P 2 O 5 is 10% or less when the sum of the contents of P 2 O 5 and B 2 O 3 exceeds 50%, and
the glass does not substantially contain lead (PbO or Pb 3 O 4 ), Li 2 O, Na 2 O and K 2 O, except for those contained as impurities.
2. The glass for a scattering layer of an organic LED element according to claim 1 , wherein, in terms of mol % on the basis of oxides, the sum of the contents of TiO 2 and WO 3 is 0˜12%, the content of ZrO 2 is 0˜5%, and the sum of the contents of MgO, CaO, SrO and BaO is 0˜10%.
3. The glass for a scattering layer of an organic LED element according to claim 1 , wherein a refractive index measured at 25° C. by d line of a He lamp (wavelength of 587.6 nm) is 1.85 or more.
4. The glass for a scattering layer of an organic LED element according to claim 1 , wherein the glass has an average linear expansion coefficient at 50° C.˜300° C. of 60×10 −7 ˜100×10 −7 /° C.
5. The glass for a scattering layer of an organic LED element according to claim 1 , wherein, in terms of mol% on the basis of oxides, the content of P 2 O 5 is 5˜20%.
6. The glass for a scattering layer of an organic LED element according to claim 1 , wherein the glass does not substantially contain P 2 O 5 , except for P 2 O 5 as an impurity.
7. An organic LED element sequentially comprising:
a substrate;
a scattering layer;
a first electrode;
an organic layer; and
a second electrode,
wherein the scattering layer comprises a base material and one or more kinds of scattering materials being dispersed in the base material and having a different refractive index from the base material, and
the base material comprises a glass containing, in terms of mol % on the basis of oxides, 0˜20% of P 2 O 5 , 15˜60% of B 2 O 3 , 15˜28% of Bi 2 O 3 , and 20˜50% of ZnO, in which a value obtained by dividing the content of P 2 O 5 by the content of ZnO is less than 0.48, the sum of the contents of P 2 O 5 and B 2 O 3 is 30˜60%, the content of P 2 O 5 is 10% or less when the sum of the contents of P 2 O 5 and B 2 O 3 exceeds 50%, and the glass does not substantially contain lead (PbO or Pb 3 O 4 ), Li 2 O, Na 2 O and K 2 O, except for those contained as impurities.
8. A glass for a scattering layer of an organic LED element, which contains, in terms of mol % on the basis of oxides, 0˜20% of P 2 O 5 , 15˜60% of B 2 O 3 , 10-37% of Bi 2 O 3 , 5˜50% of ZnO, 0˜20% of SiO 2 , 0˜10% of Al 2 O 3 , 0˜5% of ZrO 2 , 0˜10% of Gd 2 O 3 , 0˜15% of TiO 2 , and 0˜10% of the total of MgO, CaO, SrO and BaO,
wherein a value obtained by dividing the content of P 2 O 5 by the content of ZnO is less than 0.48,
the sum of the contents of P 2 O 5 and B 2 O 3 is 30˜60%,
the content of P 2 O 5 is 10% or less when the sum of the contents of P 2 O 5 and B 2 O 3 exceeds 50%, and
the glass does not substantially contain lead (PbO or Pb 3 O 4 ), Li 2 O, Na 2 O and K 2 O, except for those contained as impurities.
9. The glass for a scattering layer of an organic LED element according to claim 8 , wherein, in terms of mol % on the basis of oxides, the content of P 2 O 5 is 2˜20%.
10. The glass for a scattering layer of an organic LED element according to claim 8 , wherein, in terms of mol % on the basis of oxides, the content of Gd 2 O 3 is 2˜10%.
11. An organic LED element sequentially comprising:
a substrate;
a scattering layer;
a first electrode;
an organic layer; and
a second electrode,
wherein the scattering layer comprises a base material and one or more kinds of scattering materials being dispersed in the base material and having a different refractive index from the base material, and
the base material contains, in terms of mol % on the basis of oxides, 0˜20% of P 2 O 5 , 15˜60% of B 2 O 3 , 10˜37% of Bi 2 O 3 , 5˜50% of ZnO, 0˜20% of SiO 2 , 0˜10% of Al 2 O 3 , 0˜5% of ZrO 2 , 0˜10% of Gd 2 O 3 , 0˜15% of TiO 2 and 0˜10% of the total of MgO, CaO, SrO and BaO, in which a value obtained by dividing the content of P 2 O 5 by the content of ZnO is less than 0.48, the sum of the contents of P 2 O 5 and B 2 O 3 is 30˜60%, the content of P 2 O 5 is 10% or less when the sum of the contents of P 2 O 5 and B 2 O 3 exceeds 50%, and the base material does not substantially contain lead (PbO or Pb 3 O 4 ), Li 2 O, Na 2 O and K 2 O, except for those contained as impurities.