Light-emitting device and input/output device

• US 9,859,300 B2
• Filed: 04/30/2015
• Issued: 01/02/2018
• Est. Priority Date: 05/02/2014
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Nakamura, Daiki, Ikeda, Hisao, Toyotaka, Kouhei
• Primary Examiner(s): Jahan, Bilkis
• Assistant Examiner(s): Barzykin, Victor
• Application Number:
  US14/700,652
• Publication Number:
  US 20150318339A1
• Time in Patent Office: 978 Days
• CPC Class Codes: H01L 27/12 the substrate being other than a semiconductor body, e.g. an insulating body
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H10K 2102/00 Constructional details relating to the organic devices covered by this subclass
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/818 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/127 comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates
• CPC Class Codes: H10K 59/1315 comprising structures specially adapted for lowering the resistance
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

To provide a light-emitting device or an input/output device with little unevenness in display luminance or high reliability and to provide an input/output device with high detection sensitivity, a light-emitting device is configured to include a first substrate, a light-emitting element over the first substrate, a first conductive layer over the light-emitting element, a first insulating layer over the first conductive layer, a second conductive layer over the first insulating layer, and a second substrate over the second conductive layer. The light-emitting element includes a first electrode over the first substrate, a layer containing a light-emitting organic compound over the first electrode, and a second electrode over the layer containing a light-emitting organic compound. The second electrode is electrically connected to the first and second conductive layers. The first conductive layer and the second electrode transmit light emitted from the light-emitting element. The resistance of the second conductive layer is lower than that of the second electrode.

Claims

1. A light-emitting device comprising:

a first substrate;

a light-emitting element over the first substrate;

a first conductive layer over the light-emitting element;

a first insulating layer over the first conductive layer;

a second conductive layer over the first insulating layer; and

a second substrate over the second conductive layer,

wherein the light-emitting element comprises a first electrode over the first substrate, a light-emitting layer over the first electrode, and a second electrode over the light-emitting layer,

wherein the second electrode, the first conductive layer, and the second conductive layer are electrically connected to each other,

wherein the first insulating layer comprises an opening,

wherein the first conductive layer and the second conductive layer are directly connected to each other in the opening, and

wherein the first conductive layer and the second electrode are configured to transmit light emitted from the light-emitting element.

2. The light-emitting device according to claim 1,

wherein a resistance of the second conductive layer is lower than a resistance of the second electrode.

3. The light-emitting device according to claim 1,

wherein the first conductive layer comprises a metal oxide layer, and

wherein the second conductive layer comprises a metal layer.

4. The light-emitting device according to claim 1, further comprising a bonding layer between the light-emitting element and the first conductive layer.

5. The light-emitting device according to claim 1, wherein the first substrate and the second substrate are flexible.

6. The light-emitting device according to claim 1, further comprising a first transistor between the first substrate and the light-emitting element,

wherein the first transistor is electrically connected to the light-emitting element.

7. The light-emitting device according to claim 1, further comprising a coloring layer between the first insulating layer and the first conductive layer,

wherein the coloring layer overlaps with the light-emitting element.

8. The light-emitting device according to claim 1, further comprising a first light-blocking layer between the first insulating layer and the first conductive layer,

wherein the first light-blocking layer overlaps with the second conductive layer.

9. The light-emitting device according to claim 1, further comprising a second light-blocking layer between the second substrate and the first conductive layer,

wherein the second light-blocking layer overlaps with the second conductive layer.

10. The light-emitting device according to claim 1, further comprising a second insulating layer,

wherein an end portion of the first electrode is covered by the second insulating layer, and

wherein the first conductive layer is in contact with the second electrode in a region overlapping with the first insulating layer.

11. An input/output device comprising:

the light-emitting device according to claim 1; and

a sensor portion comprising a capacitor,

wherein the light-emitting device and the sensor portion overlap with each other.

12. An input/output device comprising:

a first substrate;

a first transistor over the first substrate;

a light-emitting element over the first transistor;

a first conductive layer over the light-emitting element;

a first insulating layer over the first conductive layer;

a second conductive layer over the first insulating layer;

a second substrate over the second conductive layer; and

a second transistor and a capacitor between the first conductive layer and the second substrate,

wherein the first transistor and the light-emitting element are electrically connected to each other,

wherein the second transistor and the capacitor are electrically connected to each other,

wherein the first conductive layer overlaps with the light-emitting element,

wherein the first conductive layer is configured to transmit light emitted from the light-emitting element,

wherein the first insulating layer comprises an opening,

wherein the first conductive layer and the second conductive layer are directly connected to each other in the opening,

wherein the second conductive layer is formed on a same plane as a gate electrode or source and drain electrodes of the second transistor, and

wherein the second conductive layer comprises a same material as a material of the gate electrode or the source and drain electrodes of the second transistor.

13. The input/output device according to claim 12, further comprising a bonding layer between the light-emitting element and the first conductive layer.

14. The input/output device according to claim 12,

wherein the light-emitting element comprises a first electrode over the first substrate, a light-emitting layer over the first electrode, and a second electrode over the light-emitting layer, and

wherein the second electrode is electrically connected to the first conductive layer.

15. The input/output device according to claim 12,

wherein the light-emitting element is configured to emit light toward the second substrate.

16. The input/output device according to claim 12,

wherein the first conductive layer comprises a metal oxide layer, and

wherein the second conductive layer comprises a metal layer.

17. The input/output device according to claim 12,

wherein the first conductive layer is configured to be supplied with a predetermined potential.

18. The input/output device according to claim 12, wherein the first substrate and the second substrate are flexible.

19. The input/output device according to claim 12, further comprising a coloring layer between the first insulating layer and the first conductive layer,

wherein the coloring layer overlaps with the light-emitting element.

20. The input/output device according to claim 12, further comprising a first light-blocking layer between the first insulating layer and the first conductive layer,

wherein the first light-blocking layer overlaps with the second conductive layer.

21. The input/output device according to claim 12, further comprising a second light-blocking layer between the second substrate and the first conductive layer,

wherein the second light-blocking layer overlaps with the second conductive layer.