Substrate for device having an organic light-emitting diode

Patent metadata

Field	Value
Publication number	US-10084144-B2
Application number	US-201414770190-A
Country	US
Kind code	B2
Filing date	Feb 24, 2014
Priority date	Feb 25, 2013
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

A diffusing substrate for a device having an organic light-emitting diode including a sheet of glass coated on one of the surfaces thereof with a layer including a vitreous material, such that the vitreous material has a chemical composition including the following components, which vary within the weight limits defined below:

Bi 2 O 3
60-85% 

B 2 O 3
5-12% 

SiO 2
6-20% 

MgO + ZnO
0-9.5%  

Al 2 O 3
0-7%

Li 2 O + Na 2 O + K 2 O
0-5%

CaO
0-5%

BaO
0-20%.

First claim

The invention claimed is:

1. A scattering substrate for a device having an organic light-emitting diode comprising a sheet of glass coated on one of the faces thereof with a layer comprising a vitreous material, such that said vitreous material has a chemical composition comprising the following constituents, which vary within the weight limits defined hereinafter:

Bi 2 O 3
60-85% 

B 2 O 3
5-12%

SiO 2
6-10%

MgO + ZnO
0-9.5% 

Al 2 O 3
0-7

Li 2 O + Na 2 O + K 2 O
0.02-5%  

CaO
 0-5%

BaO
 0-20%,

wherein a glass transition temperature Tg of glass constituting the vitreous material is in a range from 440 to 480° C.

2. The scattering substrate as claimed in claim 1 , wherein the weight content of Bi 2 O 3 is included in a range of from 65% to 80%.

3. The scattering substrate as claimed in claim 2 , wherein the weight content of Bi 2 O 3 is included in a range of from 68% to 75%.

4. The scattering substrate as claimed in claim 1 , wherein the weight content of ZnO is at most 8%.

5. The scattering substrate as claimed in claim 4 , wherein the weight content of ZnO is less than 5%.

6. The scattering substrate as claimed in claim 1 , wherein the weight content of SiO 2 is included in a range of from 7% to 9%.

7. The scattering substrate as claimed in claim 1 , wherein the sum of the weight contents of MgO and ZnO is included in a range of from 2% to 9%.

8. The scattering substrate as claimed in claim 1 , wherein the sum of the weight contents of CaO and MgO is included in a range of from 0.5% to 4%.

9. The scattering substrate as claimed in claim 1 , wherein the chemical composition of the vitreous material comprises the oxides TiO 2 and/or SnO 2 .

10. The scattering substrate as claimed in claim 9 , wherein the TiO 2 content is at least 0.5% or 1% and at most 5%.

11. The scattering substrate as claimed in claim 10 , wherein the TiO 2 content is at most 2%.

12. The scattering substrate as claimed in claim 9 , wherein the SnO 2 content is at least 0.2% or 0.5% and at most 5%.

13. The scattering substrate as claimed in claim 12 , wherein the SnO 2 content is at most 3%.

14. The scattering substrate as claimed in claim 1 , wherein the layer comprising a vitreous material also comprises scattering elements chosen from particles and cavities.

15. The substrate as claimed in claim 14 , wherein the particles are chosen from aluminum particles, zirconia particles, silica particles, titanium dioxide particles, calcium carbonate particles and barium sulfate particles.

16. The substrate as claimed in claim 1 , wherein the layer comprising a vitreous material consists of said vitreous material, and wherein the sheet of glass scatters light or a scattering layer is placed under the layer comprising a vitreous material.

17. The scattering substrate as claimed in claim 1 , wherein an electrically conductive layer is placed on the layer comprising a vitreous material.

18. A device having an organic light-emitting diode, comprising a scattering substrate as claimed in claim 17 .

19. The scattering substrate as claimed in claim 1 , wherein the sum Li 2 O+Na 2 O+K 2 O is 0.05-5%.

20. The scattering substrate as claimed in claim 1 , wherein the weight content of Al 2 O 3 is 1-4%.

21. The scattering substrate as claimed in claim 19 , wherein the only alkali metal oxide present in the chemical composition is Na 2 O.

22. A glass frit of which the chemical composition comprises the following constituents, which vary within the weight limits defined hereinafter:

Bi 2 O 3
65-85% 

B 2 O 3
5-12% 

SiO 2
6-10% 

MgO + ZnO
0-9.5%  

Al 2 O 3
0-5%

Li 2 O + Na 2 O + K 2 O
0.02-5% 

CaO
0-5%

CaO + MgO
≥0.5

BaO
0-20%, 

wherein a glass transition temperature Tg of glass constituting the vitreous material is in a range from 440 to 480° C.

23. The glass frit as claimed in claim 22 , wherein the sum Li 2 O+Na 2 O+K 2 O is 0.05-5%.

24. The glass frit as claimed in claim 23 , wherein the only alkali metal oxide present in the chemical composition is Na 2 O.

25. The glass frit as claimed in claim 22 , wherein the weight content of SiO 2 is included in a range of from 7% to 9%.

Assignees

• Saint Gobain

Inventors

• Raguenet Bérangère

Classifications

• C03C17/04

  by fritting glass powder · CPC title

• C03C4/20

  for chemical resistant glass · CPC title

• C03C17/3417

  all coatings being oxide coatings · CPC title

• C03C3/064 Primary

  containing boron · CPC title

• C03C8/02

  Frit compositions, i.e. in a powdered or comminuted form · CPC title