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JP-2026075885-A - Organic light-emitting device

JP2026075885AJP 2026075885 AJP2026075885 AJP 2026075885AJP-2026075885-A

Abstract

[Problem] To provide a light-emitting device with excellent light extraction efficiency. [Solution] A light-emitting device having a first light-emitting element and a plurality of second light-emitting elements on the main surface of a substrate, wherein the first light-emitting element and the second light-emitting elements each have a first electrode, a light-emitting layer, and a second electrode, the first light-emitting element has a color filter that transmits first light on the second electrode, and the plurality of second light-emitting elements each have a first layer that transmits second light and has a refractive index lower than that of the color filter on the second electrode, characterized in that, in a plan view with respect to the main surface, at least two different sides of the color filter are in contact with the first layer of the plurality of second light-emitting elements. [Selection Diagram] Figure 1

Inventors

  • 日當 翔馬
  • 伊藤 希之

Assignees

  • キヤノン株式会社

Dates

Publication Date
20260511
Application Date
20241023

Claims (20)

  1. The substrate has a first light-emitting element and a plurality of second light-emitting elements on its main surface. The first light-emitting element and the second light-emitting element each have a first electrode, a light-emitting layer, and a second electrode. The first light-emitting element has a color filter that transmits the first light on the second electrode, The plurality of second light-emitting elements are light-emitting devices having a first layer on the second electrode that transmits second light and has a refractive index lower than that of the color filter, A light-emitting device characterized in that, in a plan view with respect to the main surface, at least two different sides of the color filter are in contact with the first layer having the plurality of second light-emitting elements.
  2. The light-emitting device according to claim 1, characterized in that the first layer is made of a transparent resin.
  3. The light-emitting device according to claim 1, characterized in that the first layer is a color filter.
  4. The light-emitting device according to claim 1, characterized in that the first layer consists of air.
  5. The light-emitting device according to claim 1, characterized in that, in a plan view with respect to the main surface, 40% or more of the outer circumference of the color filter is in contact with the first layer.
  6. The light-emitting device according to claim 1, characterized in that when the refractive index of the color filter is n1 and the refractive index of the first layer is n2 , relation (a) is satisfied. (a) n 1 - n 2 >0.2
  7. The first light-emitting element has a first light-emitting region, The light-emitting device according to claim 1, characterized in that, in a cross section perpendicular to the main surface, the point of contact between the color filter and the first layer on the upper surface of the color filter is the first point, the end of the first light-emitting region on the side of the first point is the second point, the line passing through the first point and parallel to the main surface is the first line, the line passing through the first point and perpendicular to the main surface is the second line, the line passing through the second point and parallel to the main surface is the third line, the line passing through the second point and perpendicular to the main surface is the fourth line, the width from the second line to the fourth line is H, the distance between the first line and the third line is V, the refractive index of the color filter is n1 , and the refractive index of the first layer is n2 , satisfies relationship (b). (b) n 2 /n 1 <V/(H 2 +V 2 ) 1/2
  8. The light-emitting device according to claim 1, characterized in that the first light-emitting element and the second light-emitting element are organic light-emitting elements.
  9. The light-emitting device further comprises a third light-emitting element, The third light-emitting element comprises a first electrode, a light-emitting layer, and a second electrode. The third light-emitting element has a second color filter on the second electrode that transmits the third light, The light-emitting device according to claim 1, characterized in that, in a plan view with respect to the main surface, at least two different sides of the second color filter are in contact with the first layer having a plurality of second light-emitting elements.
  10. The light-emitting device according to claim 9, characterized in that the third light-emitting element is an organic light-emitting element.
  11. The light-emitting device according to claim 9, characterized in that, in a plan view with respect to the main surface, the color filter is in contact with two to four of the first layers, and the second color filter is in contact with two to four of the first layers.
  12. The light-emitting apparatus according to claim 9, characterized in that, in a plan view with respect to the main surface, the arrangement of the color filter, the second color filter, and the first layer is a Bayer arrangement, a delta arrangement, or a pentile arrangement.
  13. The light-emitting device according to claim 1, characterized in that the light-emitting material in the light-emitting layer of the first light-emitting element and the light-emitting material in the light-emitting layer of the second light-emitting element are the same compound.
  14. The light-emitting device according to claim 1, characterized in that the light-emitting material in the light-emitting layer of the first light-emitting element and the light-emitting material in the light-emitting layer of the second light-emitting element are different compounds.
  15. The light-emitting device according to claim 1, characterized in that the first light-emitting element and the second light-emitting element have an optical resonator structure.
  16. The light-emitting device according to claim 1, characterized in that the second light has an emission peak in the range of 490 nm to 550 nm.
  17. The light-emitting device according to claim 9, characterized in that the first layer is arranged so as to be surrounded by the color filter and the second color filter.
  18. A display device comprising: a display unit having a light-emitting device according to any one of claims 1 to 17; and a housing on which the display unit is provided.
  19. It has an image sensor that receives light and a display unit that displays the image captured by the image sensor, A photoelectric converter characterized in that the light-emitting device according to any one of claims 1 to 17 is the display unit.
  20. An electronic device comprising a display unit having a light-emitting device as described in any one of claims 1 to 17, a housing on which the display unit is provided, and a communication unit provided in the housing for communicating with the outside.

Description

This invention relates to an organic light-emitting device. An organic light-emitting device (hereinafter also referred to as an "organic EL device," "light-emitting device," or "organic device") is a light-emitting device comprising a pair of electrodes and an organic compound layer containing a light-emitting layer between the pair of electrodes. Organic light-emitting devices are known for their low driving voltage, diverse emission wavelengths, fast response, and the ability to be made thinner and lighter. They are used in thin displays, lighting fixtures, head-mounted displays (HMDs), and other applications. Incidentally, one known method for light-emitting devices is the use of color filters. For example, by having red, green, and blue light-emitting materials in each pixel, and forming color filters for each color on pixels that emit white light, full-color display becomes possible by spectrally separating the white light. Organic light-emitting devices using color filters do not require the formation of an organic compound layer on each individual light-emitting pixel, making it easy to achieve high resolution for the light-emitting pixels. Patent Document 1 describes a configuration in a light-emitting device that includes sub-pixels with a color filter layer and sub-pixels without a color filter layer, in order to improve the light extraction efficiency of the device. Japanese Patent Publication No. 2023-99337 This is a plan view of the light-emitting device of this embodiment.This is a cross-sectional view of the light-emitting device of this embodiment.This is a cross-sectional view of the light-emitting device of this embodiment.This is a plan view of the light-emitting device of this embodiment.This is a plan view of the light-emitting device of this embodiment.This is a plan view of the light-emitting device of this embodiment.This is a plan view of the light-emitting device of this embodiment.This is a plan view of the light-emitting device of this embodiment.This is a plan view of the light-emitting device of this embodiment.This is a plan view of the light-emitting device of this embodiment.This is a schematic diagram illustrating an example of a display device according to one embodiment of the present invention.(a) A schematic diagram showing an example of an imaging device according to one embodiment of the present invention. (b) A schematic diagram showing an example of an electronic device according to one embodiment of the present invention.(a) A schematic diagram showing an example of a display device according to one embodiment of the present invention. (b) A schematic diagram showing an example of a foldable display device.(a) A schematic diagram showing an example of a lighting device according to one embodiment of the present invention. (b) A schematic diagram showing an example of an automobile having a vehicle light fixture according to one embodiment of the present invention. (c) A schematic diagram showing an example of an automobile having a display unit according to one embodiment of the present invention.(a) A schematic diagram showing an example of a wearable device according to one embodiment of the present invention. (b) A schematic diagram showing an example of a wearable device according to one embodiment of the present invention, which includes an imaging device.This is a cross-sectional view of the comparative example light-emitting device.This is a plan view of the comparative example light-emitting device. The embodiments of the present invention will be described in detail below with reference to the attached drawings. Note that the following embodiments do not limit the invention as defined in the claims. While multiple features are described in the embodiments, not all of these features are necessarily essential to the invention, and the features may be combined in any way. Furthermore, in the attached drawings, the same or similar configurations are given the same reference numerals, and redundant descriptions are omitted. Furthermore, in this specification, "top" and "bottom" of the substrate refer to the side of the substrate on which the first electrode is located, and the opposite side, respectively. Also, when it is stated that the first electrode is located on the "top" of the substrate, the substrate and the first electrode do not necessarily need to be in contact. Furthermore, in this specification, when referring to a specific organic light-emitting element 20 among multiple color filters, a subscript is added after the reference number, such as "organic light-emitting element 20 'R'". When any of the elements is acceptable, it is simply indicated as "organic light-emitting element 20 '20'". The same applies to other components. Furthermore, while an "edge" is defined as a line connecting adjacent vertices, the vertices themselves may be rounded. In that case, the intersection point expected by extending the edges that make up a vertex can be conside