JP2016062858A - Organic electroluminescent element, illumination device, and illumination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic electroluminescent element, an illumination device, and an illumination system having a long life.SOLUTION: An organic electroluminescent element of an embodiment includes a substrate, a first to second electrodes, an organic light-emitting layer, and a first to second auxiliary wiring parts. The second electrode is separated from the first electrode in a first direction. The first electrode is provided between the substrate and the second electrode. The organic light-emitting layer is provided between the first electrode and the second electrode. The first auxiliary wiring part is provided between the substrate and the organic light-emitting layer and extends in a second direction. The second auxiliary wiring part is aligned with and separated from the first auxiliary wiring part in a third direction. The second electrode includes a conductive part extending in the second direction. The conductive part includes a first end part, a second end part, and an intermediate part. The first end part overlaps with at least part of the first auxiliary wiring part. The second end part is separated from the first end part in the third direction and overlaps with at least part of the second auxiliary wiring part. The intermediate part is provided between the first end part and the second end part and overlaps with neither the first auxiliary wiring part nor the second auxiliary wiring part.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to an organic electroluminescent element, an illumination device, and an illumination system.

  In the organic electroluminescence device, an organic light emitting layer is provided between a first electrode (anode) and a second electrode (cathode). By applying a voltage between these electrodes, light is emitted from the organic light emitting layer. There is an illumination device using an organic electroluminescent element as a light source. There is an illumination system including a plurality of organic electroluminescent elements and a control unit that controls the plurality of organic electroluminescent elements. In organic electroluminescent elements, it is desired to extend the life.

JP 2011-249541 A

  Embodiments of the present invention provide a long-life organic electroluminescent element, a lighting device, and a lighting system.

  According to the embodiment of the present invention, the organic electroluminescent device includes a substrate, a first electrode, a second electrode, an organic light emitting layer, a first auxiliary wiring portion, and a second auxiliary wiring portion. The first electrode is light transmissive. The second electrode is separated from the first electrode in the first direction. The first electrode is provided between the substrate and the second electrode. The organic light emitting layer is provided between the first electrode and the second electrode. The first auxiliary wiring part is provided between the substrate and the organic light emitting layer. The first auxiliary wiring portion is electrically connected to the first electrode and extends in a second direction that intersects the first direction. The second auxiliary wiring part is provided between the substrate and the organic light emitting layer. The second auxiliary wiring portion is electrically connected to the first electrode, extends in the second direction, and is separated from the first auxiliary wiring portion in a third direction intersecting the first direction and the second direction. And line up. The second electrode includes a conductive part extending in the second direction. The conductive portion includes a first end portion, a second end portion, and an intermediate portion. The first end portion overlaps at least a part of the first auxiliary wiring portion. The second end portion is separated from the first end portion in the third direction and overlaps at least a part of the second auxiliary wiring portion. The intermediate portion is provided between the first end portion and the second end portion, and does not overlap each of the first auxiliary wiring portion and the second auxiliary wiring portion.

FIG. 1A and FIG. 1B are schematic views illustrating the organic electroluminescent element according to the first embodiment. 1 is a schematic cross-sectional view illustrating a part of an organic electroluminescent element according to a first embodiment. FIG. 3A and FIG. 3B are schematic views illustrating the organic electroluminescent element according to the second embodiment. It is typical sectional drawing which illustrates the organic electroluminescent element which concerns on a reference example. FIG. 5A and FIG. 5B are schematic views illustrating an organic electroluminescent element according to the third embodiment. It is typical sectional drawing which illustrates the organic electroluminescent element which concerns on another reference example. FIG. 7A and FIG. 7B are schematic views illustrating an organic electroluminescent element according to the fourth embodiment. FIG. 8A and FIG. 8B are schematic views illustrating an organic electroluminescent element according to the fifth embodiment. FIG. 9A and FIG. 9B are schematic plan views illustrating the light emitting regions of the organic electroluminescent element. FIG. 10A to FIG. 10C are schematic cross-sectional views illustrating the organic electroluminescent element according to the sixth embodiment. FIG. 11A and FIG. 11B are schematic views illustrating an organic electroluminescent element according to the seventh embodiment. It is typical sectional drawing which illustrates the illuminating device which concerns on 8th Embodiment. FIG. 13A and FIG. 13B are schematic views illustrating the illumination system according to the ninth embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between the parts, and the like are not necessarily the same as actual ones. Further, even when the same part is represented, the dimensions and ratios may be represented differently depending on the drawings.
Note that, in the present specification and each drawing, the same elements as those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.

(First embodiment)
FIG. 1A and FIG. 1B are schematic views illustrating the organic electroluminescent element according to the first embodiment.
FIG. 1A is a schematic plan view illustrating an organic electroluminescent element according to the first embodiment.
FIG. 1B is a schematic cross-sectional view illustrating the organic electroluminescent element according to the first embodiment.
FIG. 1B is a cross-sectional view taken along line A1-A2 of FIG.

  The organic electroluminescent device 110 according to the embodiment includes a first electrode 10, a second electrode 20, an organic light emitting layer 30, an auxiliary wiring layer 40, a substrate 50, a first pad portion 60, and a second pad portion. 70.

  The substrate 50 is light transmissive. The substrate 50 is, for example, a transparent substrate. For the substrate 50, for example, an inorganic material such as alkali-free glass or quartz glass is used. For the substrate 50, a plastic such as polyethylene, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide, polyamide, polyamideimide, liquid crystal polymer, or cycloolefin polymer may be used. A polymer film or the like may be used for the substrate 50. The substrate 50 is, for example, a glass substrate. In order to extract emitted light, it is preferable to use a transparent material. The shape, structure, size, and the like of the substrate 50 are appropriately selected according to the use and purpose.

  The first electrode 10 has an upper surface 10a. The first electrode 10 is light transmissive. The first electrode 10 is, for example, a transparent electrode. In this example, the first electrode 10 is provided on the substrate 50. The first electrode 10 is electrically connected to the second pad part 70.

  Here, the direction perpendicular to the upper surface 10a is taken as the Z-axis direction. One direction parallel to the upper surface 10a is defined as an X-axis direction. A direction perpendicular to the X-axis direction and the Z-axis direction is taken as a Y-axis direction. The X-axis direction and the Y-axis direction are parallel to the upper surface 10a. The X-axis direction and the Y-axis direction are directions perpendicular to the Z-axis direction. The Z-axis direction corresponds to the thickness direction of the first electrode 10.

  The second electrode 20 has light reflectivity, for example. The light reflectance of the second electrode 20 is higher than the light reflectance of the first electrode 10. The second electrode 20 is electrically connected to the first pad unit 60. The second electrode 20 is separated from the first electrode 10 in the first direction. The first electrode 10 is provided between the substrate 50 and the second electrode 20. The second electrode 20 includes a conductive part 21. The conductive portion 21 extends in the second direction. The second direction is a direction that intersects the first direction. In this example, the second electrode 20 includes a plurality of conductive portions 21. Each of the plurality of conductive portions 21 extends in the second direction and is spaced apart in the third direction. The third direction is a direction that intersects the first direction and the second direction. A first opening 22 is provided between each of the plurality of conductive portions 21. In this example, each of the plurality of conductive portions 21 extends in the Y-axis direction and is spaced apart in the X-axis direction. That is, in this example, the first direction is the Z-axis direction. The second direction is the Y-axis direction. The third direction is the X-axis direction.

  The organic light emitting layer 30 has light transmittance, for example. The organic light emitting layer 30 is transparent, for example. The organic light emitting layer 30 is provided between the first electrode 10 and the second electrode 20.

  The auxiliary wiring layer 40 includes a first auxiliary wiring portion 41 and a second auxiliary wiring portion 42. The light transmittance of each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is lower than the light transmittance of the first electrode 10. Each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided between the substrate 50 and the organic light emitting layer 30. The first auxiliary wiring part 41 is electrically connected to the first electrode 10 and the second pad part 70. The first auxiliary wiring portion 41 extends in the Y-axis direction. The second auxiliary wiring part 42 is electrically connected to the first electrode 10 and the second pad part 70. The second auxiliary wiring portion 42 extends in the Y-axis direction and is spaced apart from the first auxiliary wiring portion 41 in the X-axis direction. In this example, the auxiliary wiring layer 40 includes a plurality of first auxiliary wiring portions 41 and a plurality of second auxiliary wiring portions 42. Each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided for each of the plurality of conductive portions 21.

  In this example, each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided between the first electrode 10 and the organic light emitting layer 30. Each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided on the upper surface 10 a of the first electrode 10. The 1st electrode 10 may be provided between each of the 1st auxiliary wiring part 41 and the 2nd auxiliary wiring part 42, and the organic light emitting layer 30 (refer below-mentioned FIG.7 (b)). In this case, each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided on the substrate 50. The interval between the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is, for example, constant.

  The auxiliary wiring layer 40 is provided on the upper surface 10 a of the first electrode 10. In the auxiliary wiring layer 40, a second opening 43 is provided between the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42. In this example, the auxiliary wiring layer 40 includes a plurality of second openings 43. Each of the plurality of second openings 43 has a groove shape, for example. In the region corresponding to the plurality of second openings 43, the first electrode 10 does not overlap the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42. In this example, a plurality of portions that do not overlap the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 are provided in the first electrode 10 by the plurality of second openings 43. That is, a portion (non-overlapping portion 10p) of the first electrode 10 that does not overlap the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided.

  The second electrode 20 is provided on the organic light emitting layer 30. The second electrode 20 may include a plurality of conductive portions 21 and a plurality of first openings 22. In this example, each of the plurality of conductive portions 21 extends in the Y-axis direction and is spaced apart in the X-axis direction. Each of the plurality of conductive portions 21 is disposed at a position that overlaps one of the plurality of non-overlapping portions 10p when projected onto a plane (XY plane) parallel to the upper surface 10a.

  Each of the plurality of first openings 22 is disposed between each of the plurality of conductive portions 21. Each of the plurality of first openings 22 has a groove shape extending in the Y-axis direction, for example. Each of the plurality of first openings 22 extends in the Y-axis direction and is spaced apart in the X-axis direction. For example, the second electrode 20 has a stripe shape extending in the Y-axis direction.

  The organic light emitting layer 30 is electrically connected to the first electrode 10 through each of the plurality of second openings 43. For example, the organic light emitting layer 30 is in contact with each of the plurality of non-overlapping portions 10p of the first electrode 10 through each of the plurality of second openings 43. Thereby, the organic light emitting layer 30 is electrically connected to the first electrode 10.

  The organic light emitting layer 30 is electrically connected to the second electrode 20. For example, the organic light emitting layer 30 is in contact with each of the plurality of conductive portions 21. Thereby, the organic light emitting layer 30 is electrically connected to the second electrode 20. Note that in the present specification, the state of being electrically connected includes not only a state of direct contact but also a state in which another conductive member or the like is interposed therebetween.

  A current is passed through the organic light emitting layer 30 using the first electrode 10 and the second electrode 20. Thereby, the organic light emitting layer 30 emits light. For example, when an electric current flows, the organic light emitting layer 30 recombines electrons and holes to generate excitons. The organic light emitting layer 30 emits light using, for example, the emission of light when the exciton is radiation deactivated.

  In the organic electroluminescent element 110, a portion of the organic light emitting layer 30 between the non-overlapping portion 10p and the conductive portion 21 is a light emitting area EA. In this example, the organic light emitting layer 30 includes a plurality of light emitting areas EA between each of the plurality of non-overlapping portions 10 p and each of the plurality of conductive portions 21.

  The light emitting EL emitted from the light emitting area EA is emitted to the outside of the organic electroluminescent element 110 through the first electrode 10. A part of the light emitting EL is reflected by the second electrode 20 and is emitted to the outside through the organic light emitting layer 30 and the first electrode 10. That is, the organic electroluminescent element 110 is a single-sided light emitting type.

  In the organic electroluminescent element 110, external light OL incident from the outside passes through the substrate 50, the first electrode 10, and the organic light emitting layer 30 in the portion between the plurality of conductive portions 21. As described above, the organic electroluminescent element 110 transmits the external light OL incident on the organic electroluminescent element 110 from the outside while emitting the light emission EL. Thus, the organic electroluminescent element 110 has light transmittance. Thereby, in the organic electroluminescent element 110, the background image can be visually recognized through the organic electroluminescent element 110. That is, the organic electroluminescent element 110 is a thin-film or plate-like light source that can be seen through.

  Thus, according to the organic electroluminescent element 110 of the embodiment, a light transmissive organic electroluminescent element can be provided. When the organic electroluminescent element 110 is applied to a lighting device, various new applications are possible due to the function of transmitting a background image in addition to the lighting function.

FIG. 2 is a schematic cross-sectional view illustrating a part of the organic electroluminescent element according to the first embodiment.
As shown in FIG. 2, the organic light emitting layer 30 includes a first layer 31. The organic light emitting layer 30 may further include at least one of the second layer 32 and the third layer 33 as necessary. The first layer 31 emits light including the wavelength of visible light. The second layer 32 is provided between the first layer 31 and the first electrode 10. The third layer 33 is provided between the first layer 31 and the second electrode 20.

The first layer 31 includes, for example, Alq ₃ (tris (8-hydroxyquinolinolato) aluminum), F8BT (poly (9,9-dioctylfluorene-co-benzothiadiazole) and PPV (polyparaphenylene vinylene). A mixed material of a host material and a dopant added to the host material can be used for the first layer 31. As the host material, for example, CBP (4,4′-N , N'-bisdicarbazolyl-biphenyl), BCP (2,9-dimethyl-4,7 diphenyl-1,10-phenanthroline), TPD (4,4'-bis-N-3methylphenyl-N- (Phenylaminobiphenyl), PVK (polyvinylcarbazole), PPT (poly (3-phenylthiophene)), etc. Examples of the dopant material include Fl. pic (iridium (III) bis (4,6-di-fluorophenyl) -pyridinate-N, C2'-picolinate), Ir (ppy) 3 (tris (2-phenylpyridine) iridium) and Flr6 (bis (2, 4-difluorophenylpyridinato) -tetrakis (1-pyrazolyl) borate-iridium (III)) and the like can be used.

For example, the second layer 32 functions as a hole injection layer. The hole injection layer is made of, for example, at least PEDPOT: PPS (poly (3,4-ethylenedioxythiophene) -poly (styrenesulfonic acid)), CuPc (copper phthalocyanine), and MoO ₃ (molybdenum trioxide). Including either The second layer 32 functions as, for example, a hole transport layer. The hole transport layer may be, for example, α-NPD (4,4′-bis [N- (1-naphthyl) -N-phenylamino] biphenyl), TAPC (1,1-bis [4- [N, N— Di (p-tolyl) amino] phenyl] cyclohexane), m-MTDATA (4,4 ′, 4 ″ -tris [phenyl (m-tolyl) amino] triphenylamine), TPD (bis (3-methylphenyl) -N, N′-diphenylbenzidine) and TCTA (4,4 ′, 4 ″ -tri (N-carbazolyl) triphenylamine), etc. The second layer 32 includes, for example, holes. It may have a laminated structure of a layer functioning as an injection layer and a layer functioning as a hole transport layer, and the second layer 32 functions as a layer functioning as a hole injection layer and a hole transport layer. A layer other than the layer may be included.

The third layer 33 can include, for example, a layer that functions as an electron injection layer. The electron injection layer includes, for example, at least one of lithium fluoride, cesium fluoride, and a lithium quinoline complex. The third layer 33 can include, for example, a layer that functions as an electron transport layer. The electron transport layer may be, for example, Alq ₃ (tris (8 quinolinolato) aluminum (III)), BAlq (bis (2-methyl-8-quinolinato) (p-phenylphenolato) aluminum), Bphen (vasophenanthroline), and 3TPYMB (tris [3- (3-pyridyl) -mesityl] borane) and the like. The third layer 33 may have a stacked structure of, for example, a layer that functions as an electron injection layer and a layer that functions as an electron transport layer. The third layer 33 may include a layer different from the layer functioning as an electron injection layer and the layer functioning as an electron transport layer.

  For example, the light emitted from the organic light emitting layer 30 is substantially white light. That is, the light emitted from the organic electroluminescent element 110 is white light. Here, “white light” is substantially white, and includes, for example, white light such as red, yellow, green, blue, and purple.

  The first electrode 10 includes, for example, an oxide containing at least one element selected from the group consisting of In, Sn, Zn, and Ti. For the first electrode 10, for example, indium oxide, zinc oxide, tin oxide, indium tin oxide (ITO) film, fluorine-doped tin oxide (FTO), or conductive glass containing indium zinc oxide is used. A film (eg, NESA) manufactured by the above, gold, platinum, silver, copper, or the like can be used. The first electrode 10 functions as an anode, for example. For the first electrode 10, a transparent or translucent conductive material is usually used. The first electrode 10 is formed using, for example, a vacuum deposition method, a sputtering method, an ion plating method, a plating method, a coating method, or the like.

  The second electrode 20 includes, for example, at least one of aluminum and silver. For example, an aluminum film is used for the second electrode 20. Further, an alloy of silver and magnesium may be used as the second electrode 20. Calcium may be added to this alloy. The second electrode 20 functions as, for example, a cathode. The second electrode 20 is provided, for example, in a thin line shape or a lattice shape that cannot be visually recognized. The thin line shape or the lattice shape that cannot be visually recognized is provided, for example, with a line width and interval of about 100 micrometers (μm) / 100 μm or about 100 μm / 500 μm.

  The first electrode 10 serves as a cathode, the second electrode 20 serves as an anode, the second layer 32 functions as an electron injection layer or an electron transport layer, and the third layer 33 functions as a hole injection layer or a hole transport layer. You may let them.

  The thickness (length in the Z-axis direction) of the first electrode 10 is, for example, not less than 10 nanometers (nm) and not more than 500 nm. More preferably, it is 50 nm or more and 200 nm or less. The thickness of the organic light emitting layer 30 is, for example, not less than 50 nm and not more than 500 nm. The thickness of the second electrode 20 (conductive portion 21) is, for example, not less than 10 nm and not more than 300 nm.

  The pattern shape of the second electrode 20 may be, for example, a comb blade shape. That is, the second electrode 20 may include a plurality of conductive portions 21 that extend in the Y-axis direction and are spaced apart in the X-axis direction and portions that connect the conductive portions 21.

  The conductivity of the auxiliary wiring layer 40 is higher than the conductivity of the first electrode 10. The auxiliary wiring layer 40 has light reflectivity, for example. The light reflectance of the auxiliary wiring layer 40 is higher than the light reflectance of the first electrode 10. The auxiliary wiring layer 40 is, for example, a metal wiring. For example, the auxiliary wiring layer 40 functions as an auxiliary electrode that transmits a current flowing through the first electrode 10. Thereby, in the organic electroluminescent element 110, for example, the amount of current flowing in the direction parallel to the upper surface 10a of the first electrode 10 can be made uniform. For example, the in-plane light emission luminance can be made more uniform.

  The auxiliary wiring layer 40 includes at least one element selected from the group consisting of Mo, Ta, Nb, Al, Ni, and Ti, for example. As the auxiliary wiring layer 40, for example, a mixed film containing an element selected from this group may be used. A laminated film containing these elements may be used as the auxiliary wiring layer 40. For the auxiliary wiring layer 40, for example, a laminated film of Nb / Mo / Al / Mo / Nb may be used. For example, the auxiliary wiring layer 40 functions as an auxiliary electrode that suppresses the potential drop of the first electrode 10. The auxiliary wiring layer 40 may function as a lead electrode for supplying current.

  The auxiliary wiring layer 40 includes, for example, a plurality of auxiliary wiring portions in a thin line or lattice shape. The plurality of auxiliary wiring portions are preferably formed to have a line width that is not visible. As a result, it is possible to impart transparency to a region in the vicinity of the auxiliary wiring portion where the auxiliary wiring portion does not exist. As a result, the background of the area where the auxiliary wiring portion does not exist is transmitted and appears to be transparent to human vision.

  In the embodiment, the conductive portion 21 includes a first end portion 21a, a second end portion 21b, and an intermediate portion 21c. The first end portion 21 a overlaps at least a part of the first auxiliary wiring portion 41. The second end 21b is separated from the first end 21a in the X-axis direction. The second end portion 21 b overlaps at least a part of the second auxiliary wiring portion 42. The intermediate part 21c is provided between the first end part 21a and the second end part 21b. The intermediate portion 21 c does not overlap with each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42. In this example, the intermediate part 21c becomes the light emitting area EA.

  As shown in FIG. 1B, for example, water or oxygen (hereinafter referred to as water or the like) enters the element from the first edge portion ed1 of the second electrode 20 on the cathode side. The organic light emitting layer 30 deteriorates due to water or the like entering the element, and a non-light emitting region is generated. The deterioration of the organic light emitting layer 30 is particularly noticeable in the vicinity of the first end 21a and the second end 21b when the second electrode 20 is formed in a stripe shape. The deterioration of the organic light emitting layer 30 causes uneven light emission (non-uniformity) on the light emitting surface. As a result, the lifetime of the element may be reduced.

According to the embodiment, the first end 21 a and at least a part of the first auxiliary wiring part 41 overlap, and the second end 21 b and at least a part of the second auxiliary wiring part 42 overlap. Thereby, deterioration can be made inconspicuous in the organic light emitting layer 30 in the vicinity of the first end 21a and the second end 21b. That is, the deteriorated portion in the vicinity of the first end portion 21 a and the second end portion 21 b is difficult to be visually recognized by the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42. Thereby, generation | occurrence | production of the light emission nonuniformity in a light emission surface can be suppressed apparently. As a result, the lifetime of the element can be extended.
An organic electroluminescent element having a plurality of first regions in which the first electrode 10, the organic light emitting layer 30, and the second electrode 20 are stacked, and a non-light emitting second region provided between the plurality of first regions. In this case, the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 may be provided in the vicinity of the boundary in contact with the second region in the first region.

The portion where the first end portion 21a and the first auxiliary wiring portion 41 overlap and the portion where the second end portion 21b and the second auxiliary wiring portion 42 overlap include, for example, an element structure, an auxiliary wiring material, and a process. By selecting etc., non-light emission can be achieved. It can also emit light. For example, when Al is used as the material of the auxiliary wiring, Al is oxidized by O ₂ plasma or UV ozone. Thereby, no light emission occurs. When Mo / Al / Mo is used as the material of the auxiliary wiring, it is similarly oxidized. Thereby, molybdenum oxide becomes an injection layer and emits light. From the viewpoint of device lifetime, either non-light emission or light emission may be used. From the viewpoint of light emission loss, non-light emission is more preferable.

  Thus, according to the embodiment, the element lifetime can be extended while maintaining the light emission area ratio and the transmittance as much as possible. According to the embodiment, a long-life organic electroluminescence device can be provided.

(Second Embodiment)
FIG. 3A and FIG. 3B are schematic views illustrating the organic electroluminescent element according to the second embodiment.
FIG. 3A is a schematic plan view illustrating an organic electroluminescent element according to the second embodiment.
FIG. 3B is a schematic cross-sectional view illustrating an organic electroluminescent element according to the second embodiment.
FIG. 3B is a cross-sectional view taken along line B1-B2 of FIG.

  The organic electroluminescent element 111 according to the embodiment includes a first electrode 10, a second electrode 20, an organic light emitting layer 30, a substrate 50, a first pad portion 60, a second pad portion 70, and an organic insulating layer. 80.

  As a material of the organic insulating layer 80, for example, a polyimide resin or an acrylic resin is used. By providing the organic insulating layer 80, for example, a short circuit between the first electrode 10 and the second electrode 20 can be prevented. In addition, when the second electrode 20 is formed in a predetermined pattern, the metal mask for patterning can be prevented from coming into contact with the organic light emitting layer 30.

  The organic insulating layer 80 includes a first organic insulating part 81, a second organic insulating part 82, and a third opening 83. The first organic insulating part 81 is provided between the first electrode 10 and the organic light emitting layer 30. The first organic insulating portion 81 extends in the Y axis direction. The second organic insulating part 82 is provided between the first electrode 10 and the organic light emitting layer 30. The second organic insulating portion 82 extends in the Y-axis direction, and is spaced apart from the first organic insulating portion 81 in the X-axis direction. For example, the second organic insulating unit 82 overlaps one end of the organic light emitting layer 30 in the X-axis direction. The third opening 83 is provided between the first organic insulating part 81 and the second organic insulating part 82.

  The organic insulating layer 80 is provided on the upper surface 10 a of the first electrode 10. In this example, the organic insulating layer 80 includes a first organic insulating portion 81, a plurality of second organic insulating portions 82, and a plurality of third openings 83. The first organic insulating portion 81 and the plurality of second organic insulating portions 82 constitute a plurality of organic insulating portions. Each of the plurality of organic insulating portions extends in the Y-axis direction parallel to the upper surface 10a and is spaced apart in the X-axis direction.

  Each of the plurality of third openings 83 is located between each of the plurality of organic insulating portions. In this example, each of the plurality of third openings 83 extends in the Y-axis direction and is spaced apart in the X-axis direction. Each of the plurality of third openings 83 has a groove shape, for example. In each region of the plurality of third openings 83, a part of the first electrode 10 does not overlap the first organic insulating part 81 and the second organic insulating part 82. In this example, a plurality of portions of the first electrode 10 do not overlap the first organic insulating portion 81 and the second organic insulating portion 82 by the plurality of third openings 83. That is, the first electrode 10 is provided with a plurality of non-overlapping portions 10p.

  In the embodiment, the conductive portion 21 includes a first end portion 21a, a second end portion 21b, and an intermediate portion 21c. The first end portion 21 a overlaps at least a part of the first organic insulating portion 81. The second end 21b is separated from the first end 21a in the X-axis direction. The second end portion 21 b overlaps at least a part of the second organic insulating portion 82. The intermediate part 21c is provided between the first end part 21a and the second end part 21b. The intermediate part 21c does not overlap with the first organic insulating part 81 and the second organic insulating part 82, respectively. In this example, the intermediate part 21c becomes the light emitting area EA. The second organic insulating part 82 includes a first part 82a, a second part 82b, and a separation part 82c. The second portion 82b is separated from the first portion 82a in the X-axis direction. The separation part 82c is provided between the first part 82a and the second part 82b. That is, the second organic insulating part 82 is separated into two parts by the separation part 82c and is not continuous in the X-axis direction. For example, the organic light emitting layer 30 may be filled in the separation part 82c, and the organic light emitting layer 30 and the first electrode 10 may be in contact with each other.

Here, there is a reference example in which the separation part 82 c is not provided in the second organic insulating part 82.
FIG. 4 is a schematic cross-sectional view illustrating an organic electroluminescent element according to a reference example.
In the organic electroluminescent device 199 according to the reference example, water or the like enters the device from the first edge portion ed1 of the second electrode 20 on the cathode side, as in the first embodiment. Further, water or the like enters the element from the second edge portion ed2 between the organic light emitting layer 30 and the second organic insulating portion 82. Water or the like that has entered from the second edge portion ed2 travels between the organic light emitting layer 30 and the second organic insulating portion 82 and reaches the light emitting area EA. The organic light emitting layer 30 deteriorates due to water or the like entering the element, and a non-light emitting region is generated. The deterioration of the organic light emitting layer 30 is particularly noticeable in the vicinity of the light emitting area EA in addition to the vicinity of the first end 21a and the second end 21b when the second electrode 20 is formed in a stripe shape. Become. The deterioration of the organic light emitting layer 30 causes uneven light emission on the light emitting surface. As a result, the lifetime of the element may be reduced.

  According to the embodiment, as shown in FIG. 3A and FIG. 3B, the first end 21 a and at least a part of the first organic insulating portion 81 overlap, and the second end 21 b and the second end are overlapped. At least a part of the organic insulating part 82 overlaps. The portion where the first end portion 21a and the first organic insulating portion 81 overlap does not emit light. The portion where the second end portion 21b and the second organic insulating portion 82 overlap does not emit light. Thereby, deterioration can be made inconspicuous in the organic light emitting layer 30 in the vicinity of the first end 21a and the second end 21b.

  Furthermore, according to the embodiment, the second organic insulating portion 82 is provided with the separation portion 82c. For example, when a plurality of the first organic insulating portion 81 and the second organic insulating portion 82 are provided, of the first organic insulating portion 81 and the second organic insulating portion 82 provided on the outer edge of the organic electroluminescent element 111, The first organic insulating portion 81 or the second organic insulating portion 82 along the outer edge, or the first organic insulating portion 81 and the second organic insulating portion 82 have a separating portion 82c. Water or the like that has entered from the second edge portion ed2 travels through the second portion 82b and reaches the separation portion 82c. The second organic insulating portion 82 does not exist in the separation portion 82c. For this reason, the invading path is interrupted by the separating portion 82c, and the intruding water or the like is not easily transmitted to the first portion 82a and the light emitting area EA. Further, for example, the organic light emitting layer 30 is filled in the separation part 82c. Since the organic light emitting layer 30 is thinner than the second organic insulating portion 82, the diffusion of moisture is delayed. Thereby, deterioration in the peripheral part of the light emission area EA can be reduced. Thereby, generation | occurrence | production of the light emission nonuniformity in a light emission surface can be suppressed apparently. As a result, the lifetime of the element can be extended.

  Thus, according to the embodiment, the element lifetime can be extended while maintaining the light emission area ratio and the transmittance as much as possible. According to the embodiment, a long-life organic electroluminescence device can be provided.

(Third embodiment)
FIG. 5A and FIG. 5B are schematic views illustrating an organic electroluminescent element according to the third embodiment.
FIG. 5A is a schematic plan view illustrating an organic electroluminescent element according to the third embodiment.
FIG. 5B is a schematic cross-sectional view illustrating an organic electroluminescent element according to the third embodiment.
FIG.5 (b) is the C1-C2 sectional view taken on the line of Fig.5 (a).

  The organic electroluminescent device 112 according to the embodiment includes a first electrode 10, a second electrode 20, an organic light emitting layer 30, an auxiliary wiring layer 40, a substrate 50, a first pad portion 60, and a second pad portion. 70 and an organic insulating layer 80.

  The first electrode 10 is light transmissive. The first electrode 10 is electrically connected to the second pad part 70. The second electrode 20 includes a conductive portion 21 that extends in the Y-axis direction. The conductive part 21 is electrically connected to the first pad part 60. The light reflectance of the second electrode 20 is higher than the light reflectance of the first electrode 10.

  The auxiliary wiring layer 40 includes a first auxiliary wiring portion 41 and a second auxiliary wiring portion 42. The light transmittance of each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is lower than the light transmittance of the first electrode 10. The first auxiliary wiring part 41 is electrically connected to the first electrode 10 and the second pad part 70. The first auxiliary wiring portion 41 extends in the Y-axis direction. The second auxiliary wiring part 42 is electrically connected to the first electrode 10 and the second pad part 70. The second auxiliary wiring portion 42 extends in the Y-axis direction and is spaced apart from the first auxiliary wiring portion 41 in the X-axis direction. In this example, each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided between the first electrode 10 and the organic light emitting layer 30. Each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided on the first electrode 10.

  In this example, the second electrode 20 includes a plurality of conductive portions 21. Each of the plurality of conductive portions 21 is spaced apart in the X-axis direction. Each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided for each of the plurality of conductive portions 21.

  The organic insulating layer 80 includes a first organic insulating part 81 and a second organic insulating part 82. The first organic insulating part 81 is provided between the first auxiliary wiring part 41 and the organic light emitting layer 30. The first organic insulating portion 81 extends in the Y axis direction. The second organic insulating part 82 is provided between the second auxiliary wiring part 42 and the organic light emitting layer 30. The second organic insulating portion 82 extends in the Y-axis direction, and is spaced apart from the first organic insulating portion 81 in the X-axis direction. For example, the second organic insulating unit 82 overlaps one end of the organic light emitting layer 30 in the X-axis direction.

  In the embodiment, the conductive portion 21 includes a first end portion 21a, a second end portion 21b, and an intermediate portion 21c. The first end portion 21 a overlaps at least a part of the first organic insulating portion 81. The second end 21b is separated from the first end 21a in the X-axis direction. The second end portion 21 b overlaps at least a part of the second organic insulating portion 82. The intermediate part 21c is provided between the first end part 21a and the second end part 21b. The intermediate portion 21c overlaps at least a part of each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 and does not overlap each of the first organic insulating portion 81 and the second organic insulating portion 82.

  That is, the first auxiliary wiring portion 41 is disposed so as to protrude from the first organic insulating portion 81 toward the center of the intermediate portion 21c. The second auxiliary wiring portion 42 is disposed so as to protrude from the second organic insulating portion 82 toward the center of the intermediate portion 21c. In the auxiliary wiring layer 40, a second opening 43 is provided between the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42. In the organic insulating layer 80, a third opening 83 is provided between the first organic insulating portion 81 and the second organic insulating portion 82. The width of the second opening 43 is narrower than the width of the third opening 83. The width of the second opening 43, that is, the interval between the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is the light emitting area EA.

Here, there is another reference example in which the second auxiliary wiring portion 42 does not protrude from the second organic insulating portion 82.
FIG. 6 is a schematic cross-sectional view illustrating an organic electroluminescent element according to another reference example.
In the organic electroluminescent element 299 according to another reference example, water or the like enters the element from the first edge portion ed1 of the second electrode 20 on the cathode side, as in the first embodiment. Further, water or the like enters the element from the second edge portion ed2 between the organic light emitting layer 30 and the second organic insulating portion 82. Water or the like that has entered from the second edge portion ed2 travels between the organic light emitting layer 30 and the second organic insulating portion 82 and reaches the light emitting area EA. The organic light emitting layer 30 deteriorates due to water or the like entering the element, and a non-light emitting region is generated. The deterioration of the organic light emitting layer 30 is particularly noticeable in the vicinity of the light emitting area EA in addition to the vicinity of the first end 21a and the second end 21b when the second electrode 20 is formed in a stripe shape. Become. The deterioration of the organic light emitting layer 30 causes uneven light emission on the light emitting surface. As a result, the lifetime of the element may be reduced.

  According to the embodiment, as shown in FIG. 5A and FIG. 5B, the first end 21 a and at least a part of the first organic insulating portion 81 overlap, and the second end 21 b and the second end are overlapped. At least a part of the organic insulating part 82 overlaps. The portion where the first end portion 21a and the first organic insulating portion 81 overlap does not emit light. The portion where the second end portion 21b and the second organic insulating portion 82 overlap does not emit light. Thereby, deterioration can be made inconspicuous in the organic light emitting layer 30 in the vicinity of the first end 21a and the second end 21b.

  Furthermore, according to the embodiment, the intermediate portion 21c overlaps at least a part of each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42, and each of the first organic insulating portion 81 and the second organic insulating portion 82. Does not overlap. Water or the like that has entered from the second edge portion ed2 travels through the second organic insulating portion 82 and reaches the second auxiliary wiring portion 42. The second auxiliary wiring portion 42 is a metal such as Al, for example. For this reason, the water etc. which penetrate | invaded stops at the 2nd auxiliary wiring part 42, and become difficult to be transmitted to the light emission area EA. Thereby, deterioration in the peripheral part of the light emission area EA can be reduced. Thereby, generation | occurrence | production of the light emission nonuniformity in a light emission surface can be suppressed apparently. As a result, the lifetime of the element can be extended.

The portion where the first end portion 21a and the first auxiliary wiring portion 41 overlap and the portion where the second end portion 21b and the second auxiliary wiring portion 42 overlap include, for example, an element structure, an auxiliary wiring material, and a process. By selecting etc., non-light emission can be achieved. It can also emit light. For example, when Al is used as a material for the auxiliary wiring, Al is oxidized by O ₂ plasma, UV ozone, or the like. Thereby, no light emission occurs. When Mo / Al / Mo is used as the material of the auxiliary wiring, it is similarly oxidized. Thereby, molybdenum oxide becomes an injection layer and emits light. From the viewpoint of device lifetime, either non-light emission or light emission may be used. From the viewpoint of light emission loss, non-light emission is more preferable.

  Thus, according to the embodiment, the element lifetime can be extended while maintaining the light emission area ratio and the transmittance as much as possible. According to the embodiment, a long-life organic electroluminescence device can be provided.

(Fourth embodiment)
FIG. 7A and FIG. 7B are schematic views illustrating an organic electroluminescent element according to the fourth embodiment.
FIG. 7A is a schematic plan view illustrating an organic electroluminescent element according to the fourth embodiment.
FIG. 7B is a schematic cross-sectional view illustrating an organic electroluminescent element according to the fourth embodiment.
FIG.7 (b) is D1-D2 sectional view taken on the line of Fig.7 (a).

  The organic electroluminescent element 113 according to the embodiment includes a first electrode 10, a second electrode 20, an organic light emitting layer 30, an auxiliary wiring layer 40, a substrate 50, a first pad portion 60, and a second pad portion. 70 and an organic insulating layer 80. In the embodiment, both the auxiliary wiring layer and the organic insulating layer are included.

  In this example, the first electrode 10 is provided between each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 and the organic light emitting layer 30. Each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided on the substrate 50. The first electrode 10 is provided on each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42.

  In the embodiment, the conductive portion 21 includes a first end portion 21a, a second end portion 21b, and an intermediate portion 21c. The first end portion 21 a overlaps at least a part of the first organic insulating portion 81. The second end 21b is separated from the first end 21a in the X-axis direction. The second end portion 21 b overlaps at least a part of the second organic insulating portion 82. The intermediate part 21c is provided between the first end part 21a and the second end part 21b. The intermediate portion 21c overlaps at least a part of each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 and does not overlap each of the first organic insulating portion 81 and the second organic insulating portion 82.

  That is, the first auxiliary wiring portion 41 is disposed so as to protrude from the first organic insulating portion 81 toward the center of the intermediate portion 21c. The second auxiliary wiring portion 42 is disposed so as to protrude from the second organic insulating portion 82 toward the center of the intermediate portion 21c. In the auxiliary wiring layer 40, a second opening 43 is provided between the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42. In the organic insulating layer 80, a third opening 83 is provided between the first organic insulating portion 81 and the second organic insulating portion 82. The width of the second opening 43 is narrower than the width of the third opening 83. In this example, the width of the third opening 83, that is, the interval between the first organic insulating portion 81 and the second organic insulating portion 82 is the light emitting area EA.

  Here, as in the first embodiment, water or the like enters the element from the first edge portion ed1 of the second electrode 20 on the cathode side. Further, water or the like enters the element from the second edge portion ed2 between the organic light emitting layer 30 and the second organic insulating portion 82. Water or the like that has entered from the second edge portion ed2 travels between the organic light emitting layer 30 and the second organic insulating portion 82 and reaches the light emitting area EA. The organic light emitting layer 30 deteriorates due to water or the like entering the element, and a non-light emitting region is generated. The deterioration of the organic light emitting layer 30 is particularly noticeable in the vicinity of the light emitting area EA in addition to the vicinity of the first end 21a and the second end 21b when the second electrode 20 is formed in a stripe shape. Become. The deterioration of the organic light emitting layer 30 causes uneven light emission on the light emitting surface. As a result, the lifetime of the element may be reduced.

  According to the embodiment, as shown in FIGS. 7A and 7B, the first end 21 a and at least a part of the first organic insulating portion 81 overlap, and the second end 21 b and the second end are overlapped. At least a part of the organic insulating part 82 overlaps. The portion where the first end portion 21a and the first organic insulating portion 81 overlap does not emit light. The portion where the second end portion 21b and the second organic insulating portion 82 overlap does not emit light. Thereby, deterioration can be made inconspicuous in the organic light emitting layer 30 in the vicinity of the first end 21a and the second end 21b.

  Furthermore, according to the embodiment, the intermediate portion 21c overlaps at least a part of each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42, and each of the first organic insulating portion 81 and the second organic insulating portion 82. Does not overlap. Water or the like that has entered from the second edge portion ed2 travels through the second organic insulating portion 82 and enters the peripheral portion of the light emitting area EA. However, the peripheral portion of the light emitting area EA overlaps with each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42. For this reason, deterioration of the peripheral part of the light emitting area EA can be made inconspicuous. That is, the deteriorated portion in the peripheral portion of the light emitting area EA is hardly visually recognized by the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42. Thereby, generation | occurrence | production of the light emission nonuniformity in a light emission surface can be suppressed apparently. As a result, the lifetime of the element can be extended.

  Thus, according to the embodiment, the element lifetime can be extended while maintaining the light emission area ratio and the transmittance as much as possible. According to the embodiment, a long-life organic electroluminescence device can be provided.

(Fifth embodiment)
FIG. 8A and FIG. 8B are schematic views illustrating an organic electroluminescent element according to the fifth embodiment.
FIG. 8A is a schematic plan view illustrating an organic electroluminescent element according to the fifth embodiment.
FIG. 8B is a schematic cross-sectional view illustrating an organic electroluminescent element according to the fifth embodiment.
FIG. 8B is a cross-sectional view taken along line E1-E2 of FIG.

  The organic electroluminescent device 114 according to the embodiment includes a first electrode 10, a second electrode 20, an organic light emitting layer 30, an auxiliary wiring layer 40, a substrate 50, a first pad unit 60, and a second pad unit. 70 and an organic insulating layer 80. In the embodiment, both the auxiliary wiring layer and the organic insulating layer are included.

  In the embodiment, the first auxiliary wiring portion 41 is located on the center side (center portion) of the organic light emitting layer 30 in the X-axis direction. The second auxiliary wiring portion 42 is located on the end side in the X-axis direction of the organic light emitting layer 30. The area of the first region r1 where the intermediate portion 21c and the first auxiliary wiring portion 41 do not overlap is larger than the area of the second region r2 where the intermediate portion 21c and the second auxiliary wiring portion 42 do not overlap. That is, the first region r1 and the second region r2 are part of the light emitting region EA. The first auxiliary wiring portion 41 does not exist in the portion corresponding to the first region r1. The second auxiliary wiring portion 42 does not exist in the portion corresponding to the second region r2. Each of the first region r1 and the second region r2 is preferably provided near the center of the organic light emitting layer 30 in the Y-axis direction.

  The end side of the organic light emitting layer 30 is deteriorated faster than the central portion of the organic light emitting layer 30. For this reason, the area of the first region r1 in the central portion is made larger than the area of the second region r2 on the end side. That is, the pattern of the light emitting area EA is changed according to the deterioration state of each part of the organic light emitting layer 30. At the end portion side where deterioration is relatively fast, the area of the second region r2 is reduced (light emission area is reduced). The second region r2 is a light emitting region where the intermediate portion 21c and the second auxiliary wiring portion 42 do not overlap. On the other hand, the central portion of the relatively slow deterioration increases the area of the first region r1 (increases the light emission area). The first region r1 is a light emitting region where the intermediate portion 21c and the first auxiliary wiring portion 41 do not overlap.

  The light emitting area EA may be reduced by the portion where the intermediate portion 21c and the first auxiliary wiring portion 41 overlap and the portion where the intermediate portion 21c and the second auxiliary wiring portion 42 overlap. On the other hand, according to the embodiment, the pattern of the light emitting area EA is changed according to the deterioration state of each part of the organic light emitting layer 30. Thereby, the light emission area EA can be increased and the light emission loss can be reduced.

FIG. 9A and FIG. 9B are schematic plan views illustrating the light emitting regions of the organic electroluminescent element.
FIG. 9A is a schematic plan view illustrating the light emitting region of a full-emission organic electroluminescent element.
FIG. 9B is a schematic plan view illustrating the light emitting region of the stripe light emitting organic electroluminescent element.

  As shown in FIG. 9A, the whole surface light emission type organic electroluminescent element includes a light emitting part 201 and an outer peripheral part 202. The entire surface of the light emitting unit 201 emits light. The light emitting unit 201 is not given light transmittance. For example, even if the outer peripheral portion 202 deteriorates by about 100 μm, it does not matter much.

  As shown in FIG. 9B, the stripe light emission type organic electroluminescent element includes a light emitting part 203 and an outer peripheral part 204. The light emitting unit 203 emits light in a stripe shape. The light emitting portion 203 is given light transparency. Since the light emitting portion 203 has a stripe shape, the ratio of the outer peripheral portion 204 to the light emitting area increases. For this reason, deterioration due to intrusion of water or the like becomes remarkable in the outer peripheral portion 204.

  According to the above-described embodiments, deterioration of the outer peripheral portion 204 due to intrusion of water or the like can be made inconspicuous.

(Sixth embodiment)
FIG. 10A to FIG. 10C are schematic cross-sectional views illustrating the organic electroluminescent element according to the sixth embodiment.
As shown in FIG. 10A, the organic electroluminescent element 115 is obtained by patterning the first electrode 10 and the organic light emitting layer 30 on the substrate 50. That is, the first electrode 10 and the organic light emitting layer 30 are not continuous, and are subjected to desired patterning.

  As shown in FIG. 10B, the organic electroluminescent element 116 is obtained by patterning the first electrode 10 and the organic light emitting layer 30 on the substrate 50. That is, the first electrode 10 and the organic light emitting layer 30 are not continuous, and are subjected to desired patterning. The end structure of the element is different from the example of FIG. That is, the first end 21 a extends to the end of the first organic insulating portion 81. The second end portion 21 b extends to the end of the second organic insulating portion 82. Thereby, the 2nd electrode 20 becomes a substitute of passivation and is more preferable.

  As shown in FIG. 10C, the organic electroluminescent element 117 is obtained by patterning the first electrode 10 and the organic light emitting layer 30 on the substrate 50. That is, the first electrode 10 and the organic light emitting layer 30 are not continuous, and are subjected to desired patterning. The arrangement of the auxiliary wiring portion is different from the example of FIG. That is, in the example of FIG. 10A, each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided below the first electrode 10. In the example of FIG. 10C, each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided on the first electrode 10.

(Seventh embodiment)
FIG. 11A and FIG. 11B are schematic views illustrating an organic electroluminescent element according to the seventh embodiment.
FIG. 11A is a schematic transmission plan view illustrating an organic electroluminescent element according to the seventh embodiment.
FIG. 11B is a schematic cross-sectional view illustrating an organic electroluminescent element according to the seventh embodiment.
FIG.11 (b) is F1-F2 sectional view taken on the line of Fig.11 (a).
In order to make the drawing easy to see, some of the components are not shown in the perspective plan view of FIG.

  The organic electroluminescent device 118 according to the embodiment includes a first electrode 10, a second electrode 20, an organic light emitting layer 30, an auxiliary wiring layer 40, a substrate 50, a first pad unit 60, and a second pad unit. 70 and an organic insulating layer 80. In the embodiment, both the auxiliary wiring layer and the organic insulating layer are included.

  In this example, the first electrode 10 is provided between each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 and the organic light emitting layer 30. Each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42 is provided on the substrate 50. The first electrode 10 is provided on each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42.

  In the embodiment, the organic electroluminescent element 118 further includes a plurality of cross auxiliary wiring portions 44. The plurality of auxiliary auxiliary wiring portions 44 intersect with each of the first auxiliary wiring portion 41 and the second auxiliary wiring portion 42. The second electrode 20 further includes a plurality of cross conductive portions 23. The plurality of cross conductive parts 23 cross the conductive part 21. In this example, the auxiliary wiring layer 40 includes a plurality of first auxiliary wiring portions 41 (and a plurality of second auxiliary wiring portions 42) and a plurality of cross auxiliary wiring portions 44 that are orthogonal to each other (lattice Is provided). In the second electrode 20, each of the plurality of conductive portions 21 and each of the plurality of cross conductive portions 23 are provided orthogonal to each other (in a lattice pattern). Also in this case, as in the above-described embodiments, the element lifetime can be extended while maintaining the light emission area ratio and the transmittance as much as possible.

(Eighth embodiment)
FIG. 12 is a schematic cross-sectional view illustrating the lighting device according to the eighth embodiment.
The illumination device 210 according to the embodiment includes, for example, an organic electroluminescent element 130 and a power supply unit 205. The organic electroluminescent device 130 further includes a first substrate 51, a second substrate 52, and a seal part 53.

  As shown in FIG. 12, the first electrode 10 is provided on the first substrate 51. The first substrate 51 is light transmissive. The second substrate 52 faces the first substrate 51. The second substrate 52 is light transmissive. In this example, the configuration of the stacked body is the same as that described for the organic electroluminescent element 112. The configuration of the stacked body may be the configuration described for other organic electroluminescent elements.

  For example, the seal portion 53 is provided in an annular shape along the outer edges of the first substrate 51 and the second substrate 52, and bonds the first substrate 51 and the second substrate 52 together. Thereby, the stacked body is sealed by the first substrate 51 and the second substrate 52. In the organic electroluminescent element 130, the distance in the Z-axis direction between the first substrate 51 and the second substrate 52 is defined by the seal portion 53. This configuration can be realized, for example, by including a granular spacer (not shown) in the seal portion 53. For example, a plurality of granular spacers are dispersed in the seal portion 53, and the distance between the first substrate 51 and the second substrate 52 is defined by the diameters of the plurality of spacers.

  In the organic electroluminescent element 130, the thickness of the seal portion 53 (the length along the Z-axis direction) is, for example, 1 μm or more and 100 μm or less. More preferably, it is 5 μm or more and 20 μm or less, for example. Thereby, for example, intrusion of moisture can be suppressed. For example, the thickness of the seal portion 53 is substantially the same as the diameter of the spacer dispersed in the seal portion 53.

  In the organic electroluminescent element, there is a configuration in which a concave portion for accommodating the laminate is provided in the second substrate 52. With this configuration, it is difficult to form the second substrate 52. For example, the cost of the organic electroluminescent element is increased.

  On the other hand, in the organic electroluminescent element 130 according to the present embodiment, the distance between the first substrate 51 and the second substrate 52 is defined by the seal portion 53. Thereby, for example, a flat plate-like second substrate 52 can be used. For example, the formation of the second substrate 52 can be facilitated. An increase in cost of the organic electroluminescent element 130 can be suppressed.

  The space between the stacked body and the second substrate 52 is filled with, for example, an inert gas. A desiccant or the like may be provided between the stacked body and the second substrate 52. The space between the stacked body and the second substrate 52 may be, for example, an air layer. The space between the stacked body and the second substrate 52 may be filled with, for example, a liquid acrylic resin or an epoxy resin. Calcium oxide or barium oxide may be added to the acrylic resin or epoxy resin as a drying material.

  For example, a glass substrate or a resin substrate is used for the first substrate 51 and the second substrate 52. For the seal portion 53, for example, an ultraviolet curable resin or the like is used.

The power supply unit 205 is electrically connected to the first electrode 10 and the second electrode 20. The power supply unit 205 supplies current to the organic light emitting layer 30 through the first electrode 10 and the second electrode 20.
According to the embodiment, a long-life lighting device can be provided.

(Ninth embodiment)
FIG. 13A and FIG. 13B are schematic views illustrating the illumination system according to the ninth embodiment.
As illustrated in FIG. 13A, the illumination system 311 according to the embodiment includes, for example, an organic electroluminescent element 130 and a control unit 301.

  The control unit 301 is electrically connected to each of the plurality of organic electroluminescent elements 130 and controls turning on / off of each of the plurality of organic electroluminescent elements 130. For example, the controller 301 is electrically connected to the first electrode and the second electrode of each of the plurality of organic electroluminescent elements 130. Accordingly, the control unit 301 individually controls lighting / extinguishing of the plurality of organic electroluminescent elements 130.

As shown in FIG. 13B, in the illumination system 312, each of the plurality of organic electroluminescent elements 130 is connected in series. The controller 301 is electrically connected to the first electrode of one organic electroluminescent element 130 among the plurality of organic electroluminescent elements 130. The control unit 301 is electrically connected to the second electrode of another organic electroluminescent element 130 among the plurality of organic electroluminescent elements 130. Accordingly, the control unit 301 collectively controls lighting / extinguishing of the plurality of organic electroluminescent elements 130. As described above, the control unit 301 may individually control lighting and extinction of each of the plurality of organic electroluminescent elements 130, or may control them collectively.
According to the embodiment, a long-life lighting system can be provided.

  According to the embodiment, it is possible to provide a long-life organic electroluminescence element, a lighting device, and a lighting system.

  In the present specification, “vertical” and “parallel” include not only strictly vertical and strictly parallel, but also include, for example, variations in the manufacturing process, and may be substantially vertical and substantially parallel. is good.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. For example, included in a substrate, a first electrode, a second electrode, an organic light emitting layer, a first auxiliary wiring section, a second auxiliary wiring section, and a power supply section included in the lighting device, the lighting system, included in the organic electroluminescent element With respect to the specific configuration of each element such as a control unit, the present invention is similarly implemented by appropriately selecting from a well-known range by those skilled in the art, and within the scope of the present invention as long as similar effects can be obtained. Is included.

  Moreover, what combined any two or more elements of each specific example in the technically possible range is also included in the scope of the present invention as long as the gist of the present invention is included.

  In addition, based on the organic electroluminescent element, the illuminating device, and the illumination system described above as the embodiments of the present invention, all organic electroluminescent elements, the illuminating device, and the illuminating system that can be implemented by a person skilled in the art appropriately changing the design Is within the scope of the present invention as long as it includes the gist of the present invention.

  In addition, in the category of the idea of the present invention, those skilled in the art can conceive of various changes and modifications, and it is understood that these changes and modifications also belong to the scope of the present invention. .

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... 1st electrode, 10a ... Upper surface, 10p ... Non-overlapping part, 20 ... 2nd electrode, 21 ... Conductive part, 21a ... 1st edge part, 21b ... 2nd edge part, 21c ... Middle part, 22 ... 1st Opening 23, crossed conductive portion, 30 ... organic light emitting layer, 31 ... first layer, 32 ... second layer, 33 ... third layer, 40 ... auxiliary wiring layer, 41 ... first auxiliary wiring portion, 42 ... first 2 Auxiliary wiring part 43 ... Second opening 44 ... Crossing auxiliary wiring part 50 ... Substrate 51 ... First substrate 52 ... Second substrate 53 ... Sealing part 60 ... First pad part 70 ... First 2 pads, 80 ... organic insulating layer, 81 ... first organic insulating part, 82 ... second organic insulating part, 82a ... first part, 82b ... second part, 82c ... separation part, 83 ... third opening, 110-118, 130, 199, 299 ... organic electroluminescent element, 20 , 203 ... light-emitting unit, 202, 204 ... outer peripheral portion, 205 ... power supply unit, 210 ... lighting device, 301 ... controller, 311, 312 ... lighting system

Claims (16)

A substrate,
A light transmissive first electrode;
A second electrode spaced apart from the first electrode in a first direction, wherein the first electrode is provided between the substrate and the second electrode;
An organic light emitting layer provided between the first electrode and the second electrode;
A first auxiliary wiring portion provided between the substrate and the organic light emitting layer, the first auxiliary wiring being electrically connected to the first electrode and extending in a second direction intersecting the first direction. And
A second auxiliary wiring portion provided between the substrate and the organic light emitting layer, electrically connected to the first electrode, extending in the second direction, the first direction and the second direction; A second auxiliary wiring portion that is spaced apart from the first auxiliary wiring portion in a third direction intersecting with
With
The second electrode includes a conductive portion extending in the second direction,
The conductive part is
A first end overlapping at least a portion of the first auxiliary wiring portion;
A second end spaced apart from the first end in the third direction and overlapping at least a portion of the second auxiliary wiring portion;
An intermediate portion provided between the first end portion and the second end portion and not overlapping each of the first auxiliary wiring portion and the second auxiliary wiring portion;
An organic electroluminescent device comprising: The light reflectance of the second electrode is higher than the light reflectance of the first electrode,
2. The organic electroluminescent element according to claim 1, wherein the light transmittance of each of the first auxiliary wiring portion and the second auxiliary wiring portion is lower than the light transmittance of the first electrode.   3. The organic electroluminescent element according to claim 1, wherein each of the first auxiliary wiring portion and the second auxiliary wiring portion is provided between the first electrode and the organic light emitting layer.   3. The organic electroluminescent element according to claim 1, wherein the first electrode is provided between each of the first auxiliary wiring portion and the second auxiliary wiring portion and the organic light emitting layer. A substrate,
A light transmissive first electrode;
A second electrode spaced apart from the first electrode in a first direction, wherein the first electrode is provided between the substrate and the second electrode;
An organic light emitting layer provided between the first electrode and the second electrode;
A first organic insulating portion provided between the first electrode and the organic light emitting layer and extending in a second direction intersecting the first direction;
Provided between the first electrode and the organic light emitting layer, extends in the second direction, and is spaced apart from the first organic insulating part in the third direction intersecting the first direction and the second direction. A second organic insulating part;
With
The second electrode includes a conductive portion extending in the second direction,
The conductive part is
A first end overlapping at least a portion of the first organic insulating portion;
A second end spaced apart from the first end in the third direction and overlapping at least a portion of the second organic insulating portion;
An intermediate portion that is provided between the first end portion and the second end portion and does not overlap each of the first organic insulating portion and the second organic insulating portion;
Including
The second organic insulating part is
A first part;
A second portion spaced from the first portion in the third direction;
A separation part provided between the first part and the second part;
An organic electroluminescent device comprising:   The organic electroluminescent element according to claim 5, wherein the light reflectance of the second electrode is higher than the light reflectance of the first electrode. A substrate,
A light transmissive first electrode;
A second electrode spaced apart from the first electrode in a first direction, wherein the first electrode is provided between the substrate and the second electrode;
An organic light emitting layer provided between the first electrode and the second electrode;
A first auxiliary wiring portion provided between the substrate and the organic light emitting layer, the first auxiliary wiring being electrically connected to the first electrode and extending in a second direction intersecting the first direction. And
A second auxiliary wiring portion provided between the substrate and the organic light emitting layer, electrically connected to the first electrode, extending in the second direction, the first direction and the second direction; A second auxiliary wiring portion that is spaced apart from the first auxiliary wiring portion in a third direction intersecting with
A first organic insulating portion provided between the first auxiliary wiring portion and the organic light emitting layer and extending in the second direction;
A second organic insulating portion provided between the second auxiliary wiring portion and the organic light emitting layer, extending in the second direction, and arranged spaced apart from the first organic insulating portion in the third direction;
With
The second electrode includes a conductive portion extending in the second direction,
The conductive part is
A first end overlapping at least a portion of the first organic insulating portion;
A second end spaced apart from the first end in the third direction and overlapping at least a portion of the second organic insulating portion;
Provided between the first end and the second end, and overlaps at least a part of each of the first auxiliary wiring portion and the second auxiliary wiring portion, and the first organic insulating portion and the second end An intermediate part that does not overlap with each of the organic insulation parts;
An organic electroluminescent device comprising: The light reflectance of the second electrode is higher than the light reflectance of the first electrode,
The organic electroluminescence device according to claim 7, wherein the light transmittance of each of the first auxiliary wiring portion and the second auxiliary wiring portion is lower than the light transmittance of the first electrode.   9. The organic electroluminescent element according to claim 7, wherein each of the first auxiliary wiring portion and the second auxiliary wiring portion is provided between the first electrode and the organic light emitting layer.   The organic electroluminescent element according to claim 7 or 8, wherein the first electrode is provided between each of the first auxiliary wiring portion and the second auxiliary wiring portion and the organic light emitting layer. The first auxiliary wiring portion is located at a central portion in the third direction of the organic light emitting layer,
The second auxiliary wiring part is located on an end side in the third direction of the organic light emitting layer,
The area of the first region where the intermediate portion and the first auxiliary wiring portion do not overlap each other is larger than the area of the second region where the intermediate portion and the second auxiliary wiring portion do not overlap. The organic electroluminescent element as described in any one. The first end portion extends to an end of the first organic insulating portion,
The organic electroluminescent element according to claim 7, wherein the second end portion extends to an end of the second organic insulating portion. The second electrode includes a plurality of the conductive parts,
Each of the plurality of conductive portions is spaced apart in the third direction,
Each of the said 1st auxiliary wiring part and the said 2nd auxiliary wiring part is an organic electroluminescent element as described in any one of Claims 7-12 provided with respect to each of these conductive parts. A plurality of crossing auxiliary wiring parts intersecting with each of the first auxiliary wiring part and the second auxiliary wiring part;
The organic electroluminescent element according to claim 13, wherein the second electrode further includes a plurality of cross conductive portions that cross the conductive portion. The organic electroluminescent element according to any one of claims 1 to 14,
A power supply unit electrically connected to the first electrode and the second electrode, and supplying a current to the organic light emitting layer through the first electrode and the second electrode;
A lighting device comprising: A plurality of organic electroluminescent elements according to any one of claims 1 to 14,
A controller that is electrically connected to each of the plurality of organic electroluminescent elements and controls lighting / extinction of each of the plurality of organic electroluminescent elements;
With lighting system.

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