Optoelectronic devices and coatings therefore

• US 8,350,275 B2
• Filed: 04/01/2011
• Issued: 01/08/2013
• Est. Priority Date: 04/01/2011
• Status: Active Grant

• Current Assignee: SABIC Global Technologies BV (Government of Saudi Arabia)
• Original Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Inventors: Yan, Min, Pickett, James Edward, Northey, Rebecca Suzanne
• Primary Examiner(s): Soward, Ida M
• Application Number:
  US13/078,180
• Publication Number:
  US 20120248496A1
• Time in Patent Office: 648 Days
• Field of Search: 257/13, 257/79, 257/94, 257/E31.11, 257/E33.055
• US Class Current: 257/79
• CPC Class Codes: C08K 5/3475 condensed with carbocyclic rings
• CPC Class Codes: C08K 5/3492 Triazines
• CPC Class Codes: C09D 7/48 Stabilisers against degradation by oxygen, light or heat
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• CPC Class Codes: Y02E 10/52 PV systems with concentrators
• CPC Class Codes: Y02E 10/541 CuInSe2 material PV cells

Abstract

An optoelectronic device assembly can include: a coated element and an electroactive cell on the coated element, wherein the electroactive cell is selected from the group consisting of a light emitting diode and a photovoltaic cell. The coated element can include: transparent thermoplastic substrate and a protective weathering layer. The transparent thermoplastic substrate can include a material selected from the group consisting of aromatic polycarbonate and polyester, and combinations including at least one of the foregoing materials. The protective weathering layer can have a UV absorbance loss rate at 330 nm of less than or equal to 0.15 A/year as estimated from filtered xenon arc exposure and/or having a rate of erosion of less than or equal to 5 μm per year as estimated from filtered xenon arc exposure.

Claims

1. An optoelectronic device assembly comprising:

a coated element comprising

transparent thermoplastic substrate comprising a material selected from the group consisting of aromatic polycarbonate and polyester, and combinations comprising at least one of the foregoing materials, and

a protective weathering layer having UV absorbance loss rate at 330 nm of less than or equal to 0.15 A/year as estimated from filtered xenon arc exposure and/or having a rate of erosion of less than or equal to 5 μ

m per year as estimated from filtered xenon arc exposure; and

an optoelectronic device on the coated element, wherein the optoelectronic device is selected from the group consisting of a light emitting diode and a photovoltaic cell.

2. The assembly of claim 1, wherein the protective weathering layer comprises a UV absorbers selected from the group consisting of 4,6-dibenzoylresorcinol, silylated 4,6-dibenzoylresorcinols, 2,4-diphenyl-6-(2′

-hydroxy-4′

alkoxyphenyl)-1,3,5-triazines, and combinations comprising at least one of the foregoing.

3. The assembly of claim 2, wherein the protective weathering layer further comprises a matrix selected from the group consisting of silicone, poly(meth)acrylates, and combinations comprising at least one of the foregoing.

4. The assembly of claim 1, wherein the protective weathering layer comprises resorcinol polyarylate.

5. The assembly of claim 1, further comprising a barrier coating layer comprising at least one zone substantially organic in composition and at least one zone substantially inorganic in composition.

6. The assembly of claim 1, further comprising a UV-cured acrylic-colloidal silica coating layer.

7. The assembly of claim 1, further comprising a planarizing layer selected from the group consisting of an epoxy based resin, an acrylic based resin, a silicone resin, and a combination comprising at least one of the foregoing.

8. The assembly of claim 7, wherein the planarizing layer has a thickness of 1 nm to 100 μ

m.

9. The assembly of claim 1, wherein the protective weathering layer comprises triazine of the formula:

10. The assembly of claim 9, wherein R₁, R₂, and R₃═

H.

11. The assembly of claim 10, wherein R₄═

C₆H₁₃.

12. The assembly of claim 10, wherein R₄═

CH₂CH₂OOCC₇H₁₅.

13. The assembly of claim 1, wherein the protective weathering layer comprises dibenzoylresorcinol of the formula:

14. The assembly of claim 13, wherein R₅, R₆, and R₇═

H.

15. The assembly of claim 1, wherein the protective weathering layer comprises dibenzoylresorcinol of the formula:

25. The assembly of claim 4, wherein the protective weathering layer comprises a block copolymer comprising polycarbonate and the resorcinol polyarylate.

16. An optoelectronic device assembly comprising:

a coated element, comprising

transparent thermoplastic substrate comprising a material selected from the group consisting of aromatic polycarbonate and polyester, and combinations comprising at least one of the foregoing materials,

a protective weathering layer having UV absorbance loss rate at 330 nm of less than or equal to 0.15 A/year as estimated from filtered xenon arc exposure and/or having a rate of erosion of less than or equal to 5 μ

m per year as estimated from filtered xenon arc exposure; and

a primer located between the weathering layer and the substrate;

an optoelectronic device on the coated element, wherein the optoelectronic device is selected from the group consisting of a light emitting diode and a photovoltaic cell; and

an adhesive located between the optoelectronic device and the substrate.

17. An optoelectronic device assembly comprising:

a coated element comprising

transparent thermoplastic substrate comprising a material selected from the group consisting of aromatic polycarbonate and polyester, and combinations comprising at least one of the foregoing materials, and

a protective weathering layer comprising a block copolymer comprising resorcinol polyarylate and polycarbonate, and wherein the block copolymer has a resorcinol polyarylate block content of greater than or equal to 80 wt % and without an additional UV absorber; and

an optoelectronic device on the coated element, wherein the optoelectronic device is selected from the group consisting of a light emitting diode and a photovoltaic cell.

18. An optoelectronic device assembly comprising:

a coated element comprising

transparent thermoplastic substrate comprising a material selected from the group consisting of aromatic polycarbonate and polyester, and combinations comprising at least one of the foregoing materials, and

a protective weathering layer comprising polycarbonate and greater than or equal to 7 wt % UV absorber; and

an optoelectronic device on the coated element, wherein the optoelectronic device is selected from the group consisting of a light emitting diode and a photovoltaic cell.

19. The assembly of claim 18, wherein the UV absorber comprises triazine.

20. The assembly of claim 19, wherein the UV absorber comprises diphenyltriazine.

21. The assembly of claim 19, wherein the protective weathering layer comprises triazine of the formula:

22. The assembly of claim 21, wherein R₁, R₂, and R₃═

H.

23. The assembly of claim 22, wherein R₄═

C₆H₁₃.

24. The assembly of claim 22, wherein R₄═

CH₂CH₂OOCC₇H₁₅.