Light-emitting device, lighting device, substrate, and manufacturing method of substrate

Patent metadata

Field	Value
Publication number	US-9401498-B2
Application number	US-201213409889-A
Country	US
Kind code	B2
Filing date	Mar 1, 2012
Priority date	Mar 4, 2011
Publication date	Jul 26, 2016
Grant date	Jul 26, 2016

Abstract

To provide a substrate which is light and has high reliability and high light extraction efficiency from an organic EL element. To provide a substrate which includes a protective layer in a resin layer, an uneven structure on a light incident surface, and an opening which surrounds the uneven structure and through which the protective layer is exposed. To provide a light-emitting device which includes a resin layer provided with an uneven structure on a light incident surface over a protective layer, and a light-emitting element in the protective layer and a counter substrate which are bonded with a sealant. The protective layer and the resin layer have a property of transmitting visible light. The light-emitting element includes a light-transmitting first electrode over a resin layer, a layer containing a light-transmitting organic compound over the first electrode, and a second electrode over the layer containing a light-transmitting organic compound.

First claim

What is claimed is:

1. A light-emitting device comprising:
a resin layer comprising an uneven structure at a top side of the resin layer;
a protective layer over the resin layer; and
a light-emitting element over the protective layer, the light-emitting element comprising a plurality of light-emitting regions which are separated from each other by partitions,
wherein the uneven structure comprises projections each having a pitch,
wherein each of the plurality of light-emitting regions overlaps with the projections,
wherein each width of the plurality of light-emitting regions is smaller than the pitch, and
wherein the partitions are positioned so as to overlap ends of the projections.

2. The light-emitting device according to claim 1 , further comprising:
a planarization layer over the uneven structure,
wherein a refractive index of the planarization layer is greater than or equal to 1.6, and
wherein the light-emitting element is over the planarization layer.

3. A lighting device comprising the light-emitting device according to claim 1 in a light-emitting portion.

4. The light-emitting device according to claim 1 , wherein the light-emitting element comprises a light-emitting layer including an organic compound having a light-emitting property.

5. A light-emitting device comprising:
a first resin layer comprising a first uneven structure at a bottom side of the first resin layer;
a protective layer over the first resin layer;
a second resin layer over the protective layer, the second resin layer comprising a second uneven structure at a top side of the second resin layer; and
a light-emitting element over the second resin layer, the light-emitting element comprising a plurality of light-emitting regions which are separated from each other by partitions,
wherein the first uneven structure comprises projections each having a pitch,
wherein each of the plurality of light-emitting regions overlaps with the projections,
wherein each width of the plurality of light-emitting regions is smaller than the pitch, and
wherein the partitions are positioned so as to overlap ends of the projections.

6. The light-emitting device according to claim 5 , further comprising:
a planarization layer over the second uneven structure,
wherein a refractive index of the planarization layer is greater than or equal to 1.6, and
wherein the light-emitting element is over the planarization layer.

7. A lighting device comprising the light-emitting device according to claim 5 in a light-emitting portion.

8. The light-emitting device according to claim 5 , wherein the light-emitting element comprises a light-emitting layer including an organic compound having a light-emitting property.

9. A light-emitting device comprising:
a substrate;
a light-emitting element over the substrate, the light-emitting element comprising a plurality of light-emitting regions which are separated from each other by partitions;
a first resin layer over the light-emitting element,
the first resin layer comprising a first uneven structure at a bottom side of the first resin layer;
a protective layer over the first resin layer; and
a second resin layer over the protective layer, the second resin layer comprising a second uneven structure at a top side of the second resin layer,
wherein the second uneven structure comprises projections each having a pitch,
wherein each of the plurality of light-emitting regions overlaps with the projections,
wherein each width of the plurality of light-emitting regions is smaller than the pitch, and
wherein the partitions are positioned so as to overlap ends of the projections.

10. The light-emitting device according to claim 9 , wherein the light-emitting element comprises a light-emitting layer including an organic compound having a light-emitting property.

11. A lighting device comprising the light-emitting device according to claim 9 in a light-emitting portion.

12. A light-emitting device comprising:
a first resin layer, the first resin layer comprising a first uneven structure at a bottom side of the first resin layer;
a first protective layer over the first resin layer;
a second resin layer over the first protective layer, the second resin layer comprising a second uneven structure at a top side of the second resin layer;
a light-emitting element over the second resin layer, the light-emitting element comprising a plurality of light-emitting regions which are separated from each other by partitions;
a third resin layer over the light-emitting element,
the third resin layer comprising a third uneven structure at a bottom side of the third resin layer;
a second protective layer over the third resin layer; and
a fourth resin layer over the second protective layer, the fourth resin layer comprising a fourth uneven structure at a top side of the fourth resin layer,
wherein each of the first uneven structure and the fourth uneven structure comprises projections each having a pitch,
wherein each of the plurality of light-emitting regions overlaps with the projections,
wherein each width of the plurality of light-emitting regions is smaller than the pitch, and
wherein the partitions are positioned so as to overlap ends of the projections.

13. The light-emitting device according to claim 12 , wherein the light-emitting element comprises a light-emitting layer including an organic compound having a light-emitting property.

14. A lighting device comprising the light-emitting device according to claim 12 in a light-emitting portion.

Assignees

• Tanaka Koichiro
• Nishido Yusuke
• Semiconductor Energy Lab

Inventors

• Tanaka Koichiro
• Nishido Yusuke

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H05B45/60

  Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED] · CPC title

• H10K50/858

  comprising refractive means, e.g. lenses · CPC title

• H10K50/844

  Encapsulations · CPC title