JP2012113918A - Light-emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting device having a heat dissipation mechanism and having a structure which does not require a step of removing ink applied on an unnecessary part in forming a light-emitting layer by an application method.SOLUTION: A light-emitting device comprises a support substrate, and a plurality of organic EL elements provided on the support substrate along a predetermined arrangement direction and connected in series. The light-emitting layer extends along the predetermined arrangement direction over the plurality of organic EL elements. Each of a pair of electrodes has an extension part that extends to protrude out of the light-emitting layer in a width direction when seen from one side of the thickness direction of the support substrate. One of the pair of electrodes extends in the arrangement direction from the extension part to one of electrodes of another organic EL element that is adjacent in the arrangement direction, and further has a connection part connected to the one of the electrodes. One of the electrodes includes a heat dissipation part extending from the extension part and/or the connection part in a direction apart from the light-emitting layer rather than an end of the other of the electrodes that forms a pair with the one of the electrodes.

Description

  The present invention relates to a light emitting device and a method for manufacturing the same.

  An organic electroluminescence element (hereinafter, “electroluminescence” may be referred to as “EL”) is a kind of light-emitting element that emits light when a voltage is applied thereto, and a pair of electrodes and a pair of electrodes. And a light emitting layer disposed on the substrate. When a voltage is applied to the organic EL element, holes are injected from the anode and electrons are injected from the cathode. Light emission occurs when these holes and electrons are combined in the light emitting layer.

  A light emitting device in which such organic EL elements are connected in series has been proposed (see, for example, Patent Document 1).

  FIG. 7 is a diagram schematically showing a light emitting device 2 in which a plurality (three in FIG. 7) of organic EL elements 1 are connected in series. FIG. 7A is a plan view of the light-emitting device 2, and FIG. 7B is a cross-sectional view of the light-emitting device 2.

  The light emitting device 2 shown in FIG. 7 includes three organic EL elements 1. These three organic EL elements 1 are arranged on the support substrate 3 along a predetermined arrangement direction X and are connected in series. Each organic EL element 1 includes a pair of electrodes 4 and 5 and a light emitting layer 6 provided between the electrodes. Hereinafter, one electrode disposed near the support substrate 3 out of the pair of electrodes 4 and 5 is referred to as a first electrode 4, and the other electrode disposed farther from the support substrate 3 than the first electrode 4. Is referred to as a second electrode 5. In consideration of the simplicity of the manufacturing process and device characteristics, not only the light emitting layer 6 but also a predetermined layer different from the light emitting layer may be provided between the first and second electrodes 4 and 5.

  As shown in FIG. 7, the first electrodes 4 of the organic EL elements 1 are discretely arranged at a predetermined interval in the arrangement direction X, and thus are not electrically connected to each other. Similarly, the second electrodes 5 of the respective organic EL elements 1 are not electrically connected to each other because they are arranged at a predetermined interval in the arrangement direction X.

  On the other hand, the first electrode 4 and the second electrode 5 of the organic EL element 1 adjacent in the arrangement direction X are connected in contact with each other and are electrically connected. Thus, the plurality of organic EL elements 1 constitutes a series connection. Specifically, the first electrode 4 is one of the arrangement directions X (hereinafter, “one of the arrangement directions X” may be referred to as “left”, and “the other of the arrangement directions X” may be referred to as right). Up to a position where the end (hereinafter also referred to as the left end) overlaps the right end (hereinafter also referred to as the right end) of the second electrode 5 of the organic EL element 1 adjacent to the left. It is formed so as to extend, is connected in contact with the first electrode 4 of the organic EL element 1 adjacent to the left side, and is electrically connected. Thus, the 1st electrode 4 and the 2nd electrode 5 of the organic EL element 1 which adjoin the arrangement direction X are electrically connected, and the some organic EL element 1 comprises a serial connection.

Next, a method for manufacturing the lighting device will be described with reference to FIG.
First, the first electrode 4 is formed on the support substrate 3. Specifically, three first electrodes 4 are discretely formed on the support substrate 3 at predetermined intervals in the arrangement direction X (see FIG. 8A).

  Next, the ink containing the material used as the light emitting layer 6 is apply | coated on the support substrate 3 by the predetermined apply | coating method. In general, it is difficult for the coating method to selectively apply the ink pattern only to the intended portion, so that the ink is also applied to unnecessary portions such as between the first electrodes 4 (see FIG. 8B). For this reason, after applying the ink, a step of removing the ink applied to unnecessary portions is required (see FIG. 8 (3)). The ink can be removed by, for example, a method of wiping ink using a cloth or cotton swab containing a solvent in which the ink is soluble, a laser ablation method, or the like. Thereafter, the second electrode 5 is patterned (see FIG. 8 (4)). As a result, a light emitting device 2 including three organic EL elements 1 connected in series can be manufactured.

JP 2007-257855 A

  The above-described conventional technique has a problem that the number of steps increases because a step of removing ink applied to unnecessary portions is required. Further, when removing the ink applied to unnecessary portions, there is a possibility that foreign matters may be mixed into the light emitting layer.

  As the number of organic EL elements constituting the series connection increases, the amount of heat generated when driving the light emitting device also increases, and the deterioration of the organic EL elements is accelerated by this heat. Therefore, a light emitting device having a mechanism for efficiently radiating generated heat is required.

  Accordingly, an object of the present invention is to provide a light emitting device having a structure that does not require a step of removing ink applied to unnecessary portions when forming a light emitting layer by a coating method, and a heat dissipation mechanism.

The present invention is a light emitting device comprising a support substrate and a plurality of organic electroluminescence elements provided on the support substrate along a predetermined arrangement direction and connected in series,
Each organic electroluminescence element includes a pair of electrodes and a light emitting layer provided between the electrodes,
The light emitting layer extends along the predetermined arrangement direction across the plurality of organic electroluminescence elements,
Each of the pair of electrodes extends so as to protrude from the light emitting layer in a width direction perpendicular to both the thickness direction of the support substrate and the arrangement direction when viewed from one thickness direction of the support substrate. Part
One electrode of the pair of electrodes extends from the extending portion to the other electrode of the organic electroluminescence element adjacent in the arrangement direction and is connected to the other electrode. Further comprising
Any one electrode of the pair of electrodes extends from the extension portion and / or the connection portion in a direction away from the light emitting layer rather than an end portion of the electrode paired with the one electrode. The present invention relates to a light emitting device including a heat radiating unit.

  Further, according to the present invention, the extending portion has a first extending portion extending so as to protrude from the light emitting layer in one of the width directions when viewed from one side in the thickness direction, and a light emitting layer on the other in the width direction. The present invention relates to a light emitting device including a second extending portion extending so as to project from the light emitting device.

  In addition, the present invention relates to a light emitting device in which one electrode provided with the heat radiating unit has a larger value obtained by adding the film thickness to the thermal conductivity than an electrode paired with the one electrode.

The present invention further includes an auxiliary electrode provided in contact with the electrode,
The auxiliary electrode relates to a light emitting device having higher thermal conductivity than an electrode in contact with the auxiliary electrode.

  The present invention also relates to a light emitting device, wherein the heat radiating part has a thermal conductivity of 30 W / (m · K) or more.

  The present invention also relates to a light emitting device, wherein the heat dissipating part has a film thickness of 100 nm or more.

Further, the present invention is a light emitting device comprising a support substrate and a plurality of organic electroluminescence elements that are provided on the support substrate along a predetermined arrangement direction and connected in series, and each organic electroluminescence element is A pair of electrodes and a light emitting layer provided between the electrodes, the light emitting layer extending across the plurality of organic electroluminescent elements along the predetermined arrangement direction, Each of the electrodes has an extending portion extending so as to protrude from the light emitting layer in a width direction perpendicular to both the thickness direction of the support substrate and the arrangement direction when viewed from one thickness direction of the support substrate. And one electrode of the pair of electrodes extends from the extending portion to the arrangement direction to the other electrode of the organic electroluminescence element adjacent to the arrangement direction. The light emitting layer is further connected to the other electrode, and any one of the pair of electrodes is more than the end of the electrode paired with the one electrode. A manufacturing method of a light emitting device, comprising a heat radiating portion extending from the extending portion and / or the connecting portion in a direction away from
The step of forming the light emitting layer by solidly applying the ink containing the material to be the light emitting layer along the predetermined arrangement direction across the plurality of organic EL elements and solidifying the applied coating film. The present invention relates to a method for manufacturing a light emitting device including the same.

  The present invention also relates to a method for manufacturing a light emitting device, wherein the method for applying the ink is a cap coating method, a slit coating method, a spray coating method, or a printing method.

  ADVANTAGE OF THE INVENTION According to this invention, when forming a light emitting layer by the apply | coating method, the structure which does not need the process of removing the ink apply | coated to the unnecessary site | part, and a light-emitting device provided with a thermal radiation mechanism are realizable.

It is a top view which shows the light-emitting device 11 of 1st Embodiment of this invention. 6 is a diagram for explaining a manufacturing process of the light emitting device 11. FIG. 6 is a diagram for explaining a manufacturing process of the light emitting device 11. FIG. It is a figure which shows typically the light-emitting device 31 of 2nd Embodiment. It is a figure which shows typically the light-emitting device 41 of 3rd Embodiment. It is a figure which shows the light-emitting device 61 of 4th Embodiment. It is a figure which shows typically the light-emitting device 2 with which the some organic EL element 1 was connected in series. 5 is a diagram for explaining a manufacturing process of the light emitting device 2. FIG.

1) Configuration of Light-Emitting Device First, the configuration of the light-emitting device will be described first with reference to the drawings. The light emitting device of this embodiment is used for a light source such as a lighting device, a liquid crystal display device, and a scanner. FIG. 1 is a plan view schematically showing a light emitting device 11 according to a first embodiment of the present invention. The light emitting device 11 includes a support substrate 12 and a plurality of organic EL elements 13 provided on the support substrate 12 and connected in series.

  The predetermined arrangement direction X is set in a direction perpendicular to the thickness direction Z of the support substrate 12. That is, the arrangement direction X is set parallel to the main surface of the support substrate 12. In the present embodiment, as shown in FIG. 1, the plurality of organic EL elements 13 are arranged along a predetermined straight line, but may be arranged along a predetermined curve. When a plurality of organic EL elements 13 are arranged along a predetermined curve, the arrangement direction X corresponds to the tangential direction of the predetermined curve.

  The number of organic EL elements 13 provided on the support substrate 12 is appropriately set according to the design. Below, the light-emitting device 11 of the form provided with the three organic EL elements 13 is demonstrated.

  Each organic EL element 13 includes a pair of electrodes 14 and 15 and a light emitting layer 16 provided between the electrodes 14 and 15. One of the pair of electrodes 14 and 15 functions as an anode of the organic EL element 13, and the other electrode functions as a cathode of the organic EL element 13. Hereinafter, of the pair of electrodes 14 and 15, an electrode disposed near the support substrate 12 is referred to as a first electrode 14, and the other electrode disposed apart from the support substrate 12 is referred to as a second electrode 15. .

  At least one light emitting layer 16 is provided between the first and second electrodes 14 and 15. In addition, between the 1st and 2nd electrodes 14 and 15, not only the one light emitting layer 16 but the layer different from a some light emitting layer and a light emitting layer may be provided as needed.

  The light emitting layer 16 extends along the arrangement direction X across the plurality of organic EL elements 13. In the present embodiment, in the plurality of organic EL elements 13 connected in series, from the light emitting layer 16 of the organic EL element 13 provided at one end in the arrangement direction X (left end in FIG. 1), the other end in the arrangement direction X (in FIG. 1). The light emitting layer extending along the arrangement direction X is continuously and integrally formed up to the light emitting layer 16 of the organic EL element 13 provided at the right end). Note that a predetermined layer different from the light emitting layer may be provided between the first and second electrodes 14 and 15 as necessary. In such a form, the predetermined layer includes a plurality of organic EL elements 13. May extend along the arrangement direction X, and may be formed so as to be separated for each organic EL element 13. When a predetermined layer different from the light emitting layer 16 is formed by a coating method, the predetermined layer different from the light emitting layer 16 is arranged across a plurality of organic EL elements 13 like the light emitting layer 16. It preferably extends along the direction X. This is because, as will be described later, a step of removing a layer formed at an unnecessary portion can be omitted.

  The first and second electrodes 14 and 15 (a pair of electrodes) have extending portions 17 and 18, respectively. The extending portions 17 and 18 are perpendicular to the thickness direction Z of the support substrate and the arrangement direction X when viewed from one side in the thickness direction Z of the support substrate 12 (hereinafter sometimes referred to as “in plan view”). It extends so as to protrude from the light emitting layer 16 in the width direction Y. The extending portion 17 of the first electrode 14 is formed integrally with the first electrode 14. The extending portion 18 of the second electrode 15 is formed integrally with the second electrode 15. The first electrode 14 and the second electrode 15 (a pair of electrodes) constituting each organic EL element 13 are not configured to contact each other for each organic EL element 13, and the first electrode in a plan view. The extending portion 17 of 14 and the extending portion 18 of the second electrode 15 are arranged so as not to overlap each other. In the present embodiment, the extending portion 17 of the first electrode 14 extends in the width direction Y from the left end portion (hereinafter also referred to as the left end portion) of the portion facing the second electrode 15 in the first electrode 14. Extend. The extending portion 18 of the second electrode 15 extends in the width direction Y from the right end portion (hereinafter sometimes referred to as the right end portion) of the second electrode 15 facing the first electrode 14. Yes. Therefore, the extending portion 17 of the first electrode 14 and the extending portion 18 of the second electrode 15 do not overlap in plan view but are electrically insulated.

  One electrode of the first and second electrodes 14 and 15 (a pair of electrodes) has a connection portion. This connecting portion extends from the extending portion to the other electrode of the organic EL element adjacent in the arrangement direction X in the arrangement direction X, and is connected to the other electrode. The connecting portion is not limited to one electrode of the first and second electrodes 14 and 15 (out of the pair of electrodes), but the other electrode of the first and second electrodes 14 and 15 (out of the pair of electrodes). May also be included. That is, the other of the first and second electrodes 14 and 15 (of the pair of electrodes) also extends in the arrangement direction X from the extending portion to one electrode of the organic EL element adjacent in the arrangement direction X. You may have the connection part connected to this one electrode.

  In the present embodiment, the second electrode 15 corresponding to one of the first and second electrodes 14 and 15 (a pair of electrodes) has a connection portion 19. That is, the second electrode 15 extends rightward from the extending portion 18 of the second electrode 15 to the extending portion 17 of the first electrode 14 (the other electrode) of the organic EL element disposed on the right side. A connection unit 19 is provided. As described above, the connection portion 19 of the second electrode 15 overlaps with the extension portion 17 of the first electrode 14 (the other electrode) of the organic EL element arranged on the right side in a plan view, and directly at the overlapping portion. It is connected to the first electrode 14 (the other electrode).

  The extending portion 18 extending in the width direction Y from the light emitting layer 16 in a plan view is provided in one or the other of the width directions Y, but is preferably provided in both the width directions Y. That is, the extended portions 17 and 18 protrude from the light emitting layer 16 in the width direction Y and the first extending portions 17a and 18a extending so as to protrude from the light emitting layer in one of the width directions in a plan view. It is preferable to include the second extending portions 17b and 18b extending so as to. By providing the extending portions 17 and 18 extending in the width direction Y from the light emitting layer 16 in plan view, the first electrode 14 and the second electrode 15 of the adjacent organic EL element 13 are both in the width direction Y. Will be connected at the end.

  Any one electrode of the pair of electrodes has a heat radiating portion extending in a direction away from the light emitting layer from an end portion of the electrode paired with the one electrode, and the extending portion and / or It extends from the connection.

  In the present embodiment shown in FIG. 1, the second electrode 15 has a heat dissipating part as one of the pair of electrodes. In other embodiments, the first electrode 14 may have a heat dissipation portion.

  The heat dissipating part 20 is provided in one or the other in the width direction Y, but is preferably provided in both the width directions Y. That is, the heat radiating portion 20 includes a first heat radiating portion 20a extending from the light emitting layer 16 to one side in the width direction and a second heat radiating portion 20b extending from the light emitting layer 16 to the other side in the width direction Y in plan view. It is preferable to include. Thus, by providing the heat radiating part 20 extending in the width direction Y from the light emitting layer 16 in plan view, the heat radiating effect can be further improved. In this embodiment shown in FIG. 1 as such a heat radiating portion, the first heat radiating portion 20a extends from the first extending portion 18a and the connecting portion 19 in one of the width directions Y, and the second heat radiating portion 20b is The second extending portion 18b and the connecting portion 19 extend to the other side in the width direction Y.

  The first heat radiating portion 20a extends to one side in the width direction Y rather than one end portion in the width direction Y of the first electrode 14, and the second heat radiating portion 20b is the other in the width direction Y of the first electrode 14. It extends to the other of the width direction Y rather than the edge part. That is, the electrode having the heat radiating portion (second electrode in the present embodiment) has one portion in the width direction Y and / or less than the electrode having the heat radiating portion (first electrode in the present embodiment) by the amount of the heat radiating portion. Or it extends so as to protrude to the other side.

  As described above, the heat dissipation effect of the light-emitting device can be enhanced by providing the heat dissipation unit 20.

  In order to secure a space for providing the heat dissipating part 20, the light emitting device may be increased in size, but for example, by providing the heat dissipating part 20 in an empty space that is unavoidably provided in the design of the light emitting device. The enlargement of the light emitting device can be suppressed. Usually, the organic EL element is not provided on the entire surface of the support substrate, and there may be a space where the heat dissipating part 20 can be provided depending on the design of the wiring or the like. By providing the heat dissipating part 20 in such a space, the enlargement of the apparatus can be suppressed.

  It is preferable that the heat radiating part 20 is composed of a member having high thermal conductivity. In the present embodiment, the heat radiating portion 20 is made of the same material as the electrode formed integrally (the second electrode 15 in the present embodiment), and therefore its thermal conductivity is an electrode formed integrally (the present embodiment). Then, it is the same as the second electrode 15). Therefore, it is preferable that the electrode is composed of a member having high thermal conductivity. Therefore, one electrode (second electrode 15 in the present embodiment) having a heat radiating portion has a greater thermal conductivity than the electrode paired with the one electrode (first electrode 14 in the present embodiment). It is preferable that the integrated value is large.

  The heat radiating part preferably has a thermal conductivity of 30 W / (m · K) or more. In addition, it is preferable that the electrode provided with this thermal radiation part similarly has the heat conductivity of 30 W / (m * K) or more. Thus, the heat dissipation characteristic of a light-emitting device can be improved by comprising an electrode provided with a thermal radiation part with a member with high thermal conductivity. An electrode including a heat radiating part having a thermal conductivity of 30 W / (m · K) or more can be constituted by a thin film containing, for example, aluminum, copper, silver, gold, iron, silicon, and carbon.

  Moreover, it is preferable that the film thickness of a thermal radiation part is 100 nm or more. Similarly, the electrode provided with this heat radiation part preferably has a film thickness of 100 nm or more. Thus, by increasing the film thickness of the electrode including the heat radiating portion, the thermal conductivity can be increased, and heat can be efficiently diffused to the heat radiating portion. From the viewpoint of heat dissipation characteristics, an upper limit is not particularly set for the film thickness of the electrode provided with the heat radiating portion, but considering the time required for forming the electrode provided with the heat radiating portion, the upper limit of the film thickness is 200 μm. Degree.

  As shown in FIG. 1, in the present embodiment, the second electrode 15 includes a heat radiating portion. However, as described above, the first electrode 14 may include a heat radiating portion. As described above, which electrode of the pair of electrodes includes the heat dissipation portion is not particularly limited, but the electrode including the heat dissipation portion is preferably selected according to the type of the organic EL element.

  Organic EL elements include (1) a bottom emission type and (2) a top emission type. The bottom emission type organic EL element emits light to the outside through the support substrate, and the top emission type organic EL element emits light to the outside from the side opposite to the support substrate. In the bottom emission type organic EL element, since light is emitted through the first electrode 14, the first electrode 14 is composed of an electrode exhibiting light transmittance, while the second electrode is composed of an electrode that reflects normal light. The In the top emission type organic EL element, since light is emitted through the second electrode, the second electrode 15 is constituted by an electrode exhibiting light transmittance, while the first electrode 14 is constituted by an electrode reflecting normal light. Is done.

  In general, the value obtained by adding the film thickness to the thermal conductivity is higher for the electrode exhibiting opaqueness than for the electrode exhibiting optical transparency, and therefore, the electrode exhibiting opaqueness may include a heat radiating portion. preferable. Therefore, in the bottom emission type organic EL element, since the second electrode is usually composed of an electrode that does not transmit light, it is preferable that the second electrode includes a heat dissipation portion. On the other hand, in a top emission type organic EL element, since the first electrode is usually composed of an electrode that does not transmit light, it is preferable that the first electrode includes a heat dissipation portion.

  The first electrode 14 of the organic EL element 13 arranged on the leftmost side among the plurality of organic EL elements 13 constituting the series connection and the second electrode of the organic EL element 13 arranged on the rightmost side are: It is electrically connected to a power supply unit (not shown) via a predetermined wiring. As a result, power is supplied from the power supply unit to the plurality of organic EL elements 13 constituting the series connection, and each organic EL element emits light.

  Each organic EL element 13 is supplied with power from the connecting portion. In the present embodiment, the organic EL elements 13 are supplied with power from both ends in the width direction Y by providing the extending portions 17 and 18 extending in the width direction Y from the light emitting layer 16 in plan view. The brightness of the organic EL element 13 decreases due to a voltage drop as the distance from the power supply portion increases. In the present embodiment, the luminance decreases with a voltage drop as the distance from the extending portions 17 and 18 in the width direction Y, that is, the central portion in the width direction Y decreases, but each organic EL element 13 has both end portions in the width direction Y. Therefore, the influence of the voltage drop can be suppressed as compared with the element configuration that is fed from one end in the width direction Y, and hence the luminance unevenness can be suppressed.

2) Manufacturing method of light-emitting device The manufacturing method of the light-emitting device of this invention is light emission provided with a support substrate and the several organic electroluminescent element provided on the said support substrate along the predetermined sequence direction, and connected in series. Each organic electroluminescence element includes a pair of electrodes and a light emitting layer provided between the electrodes, the light emitting layer straddling the plurality of organic electroluminescence elements, the predetermined arrangement direction Each of the pair of electrodes extends from the light emitting layer in a width direction perpendicular to both the thickness direction of the support substrate and the arrangement direction when viewed from one thickness direction of the support substrate. An extending portion extending so as to protrude, and one electrode of the pair of electrodes is the other of the organic electroluminescence elements adjacent in the arrangement direction The electrode further includes a connection portion extending in the arrangement direction from the extension portion to the electrode and connected to the other electrode, and any one of the pair of electrodes includes the one electrode and A heat-radiating part extending in a direction away from the light-emitting layer rather than an end part of a pair of electrodes extends from the extending part and / or the connecting part, The step of forming the light emitting layer by solidly applying the ink containing the material to be the light emitting layer along the predetermined arrangement direction across the plurality of organic EL elements and solidifying the applied coating film. Including.

  Hereinafter, a method for manufacturing the light emitting device will be described with reference to FIGS. First, the support substrate 12 is prepared. When the 1st electrode 14 consists of an electrode which shows a light transmittance, the board | substrate which shows a light transmittance is used for the support substrate 12. FIG. In the case where the second electrode 15 is made of a light transmissive electrode, the support substrate 12 can be either a light transmissive substrate or a non-light transmissive substrate. In this step, a support substrate 12 on which a drive circuit (not shown) for driving the organic EL element 13 is formed in advance may be prepared.

  Next, the 1st electrode 14 is pattern-formed on the support substrate 12 (refer FIG. 2). In the case of a bottom emission type element, a light transmissive electrode material is used for the first electrode.

  For example, a conductive film is formed on the support substrate 12 by sputtering or vapor deposition, and then the first electrode 14 is patterned by patterning the conductive film into a predetermined shape by photolithography. Note that the first electrode 14 may be pattern-formed only at a predetermined portion by a mask vapor deposition method or the like without performing a photolithography process. Alternatively, the first electrode 14 may be formed by coating an ink containing a conductive material by a predetermined coating method and solidifying the coating film. Alternatively, the second electrode 14 may be formed by transferring a conductive thin film by a laminating method. Moreover, you may prepare the support substrate 12 in which the 1st electrode 14 was formed previously.

  Next, the light emitting layer 16 is formed on the support substrate 12 (see FIG. 3). For example, the light emitting layer 16 may be formed by continuously applying an ink containing a material to be the light emitting layer 16 along the arrangement direction X across the plurality of organic EL elements 13 and solidifying the applied coating film. it can.

  Examples of the ink application method include a cap coating method, a slit coating method, a spray coating method, a printing method, an ink jet method, and a nozzle printing method. Among these methods, a large area can be efficiently applied. Possible cap coating methods, slit coating methods, spray coating methods and printing methods are preferred.

  Next, the second electrode 15 is formed on the support substrate 12. In the step of forming the second electrode 15, it is preferable that the connecting portion 19 and the heat dissipation portion 20 are also formed in the same step. The film formation method of the second electrode 15 includes a vapor deposition method, and a pattern can be formed using a metal mask or the like. Alternatively, the second electrode 14 may be formed by coating ink containing a conductive material by a predetermined coating method and solidifying the coating film. Alternatively, the second electrode 14 may be formed by transferring a conductive thin film by a laminating method.

  In the light emitting device 11 described above, the first electrode 14 and the second electrode 15 of the adjacent organic EL elements 13 are connected in a region protruding in the width direction Y from the region where the light emitting layer 16 is formed in plan view. As a result, the adjacent organic EL elements 13 are connected in series, so that it is not necessary to connect the first electrode 14 and the second electrode 15 of the adjacent organic EL elements 13 in the region between the organic EL elements 13. For this reason, a light emitting layer or the like may be formed in a region between adjacent organic EL elements 13, whereby a light emitting layer formed in a region between adjacent organic EL elements 13 when forming a light emitting layer by a coating method. The step of removing can be omitted. Therefore, even if it is a coating method such as a cap coat method that is relatively poor at applying a fine pattern, a plurality of organic EL elements 13 connected in series can be easily produced.

  Further, by providing the heat dissipating part 20, heat generated in the light emitting part of the organic EL element can be diffused, and a light emitting device with high heat dissipation characteristics in which a reduction in luminance is suppressed can be realized.

  FIG. 4 is a diagram schematically showing a light emitting device 31 according to the second embodiment of the present invention. Since the light emitting device 31 of the present embodiment is different from the light emitting device 11 of the first embodiment described above only in the shape of the second electrode 15, only the second electrode 15 will be described, and portions corresponding to the first embodiment will be described. The same reference numerals are assigned and duplicate descriptions are omitted.

  In the present embodiment, the second electrode 15 of the organic EL element 13 disposed at the right end further includes a portion 33 extending as a heat radiating portion so as to protrude rightward from the light emitting layer 16. The portion 33 extends to the right from the center of the second electrode 15 in the width direction Y, and also extends to the right from one end and the other end of the second electrode 15 in the width direction Y. It is preferable.

  Moreover, the 2nd electrode 15 of the organic EL element 13 arrange | positioned at a left end is further provided with the site | part 32 where a thermal radiation part is extended also to the left. This portion 32 is a region obtained by extending an end portion in the width direction Y of the first electrode 14 in the width direction Y, and is provided with a predetermined gap from the end portion.

  In this manner, a light emitting device with higher heat dissipation characteristics can be realized by enlarging and disposing the heat dissipation portion in the region where the heat dissipation portion can be disposed.

  As another embodiment, in a form in which the first electrode includes a heat radiating portion, the first electrode of the organic EL element disposed at the left end is a portion extending as a heat radiating portion so as to protrude leftward from the light emitting layer. Is further provided. This part preferably extends leftward from the center of the first electrode in the width direction Y, and also extends leftward from one and the other in the width direction Y of the first electrode. Moreover, the 1st electrode of the organic EL element arrange | positioned at the right end is further equipped with the site | part from which a thermal radiation part is extended also to the right side. This portion is a region obtained by extending the end portion in the width direction Y of the second electrode in the width direction Y, and is provided with a predetermined gap from the end portion.

  FIG. 5 is a diagram schematically showing a light emitting device 41 according to the third embodiment of the present invention. The light emitting device 41 of the present embodiment further includes an auxiliary electrode provided in contact with the first electrode. Since the light emitting device 41 of this embodiment is different from the light emitting device of each of the above embodiments only in the presence or absence of an auxiliary electrode, only the auxiliary electrode will be described, and the same reference numerals will be used for portions corresponding to the above embodiments. In addition, overlapping explanation is omitted. In FIG. 5, the area | region which shows an auxiliary electrode is hatched.

  The auxiliary electrode is provided in contact with at least one of the first electrode 14 and the second electrode 15 (a pair of electrodes). For example, when the auxiliary electrode is provided in contact with the first electrode 14 and the second electrode 15, the auxiliary electrode provided in contact with the first electrode 14 and the auxiliary electrode provided in contact with the second electrode An auxiliary electrode is provided.

  The auxiliary electrode is preferably constituted by a member having a higher thermal conductivity than the electrode in contact with the auxiliary electrode.

  When the auxiliary electrode 42 is provided in contact with only one of the first electrode 14 and the second electrode 15 (a pair of electrodes), of the first electrode 14 and the second electrode 15 (a pair of electrodes) Thus, it is preferable to provide the auxiliary electrode 42 in contact with an electrode having a small value obtained by adding the film thickness to the thermal conductivity.

  In general, the value obtained by adding the film thickness to the thermal conductivity is smaller for the electrode exhibiting optical transparency than for the electrode exhibiting optical transparency, so the auxiliary electrode 42 is provided in contact with the electrode exhibiting optical transparency. It is preferable. Therefore, in the bottom emission type organic EL element, since the first electrode is composed of an electrode exhibiting optical transparency, it is preferable to provide an auxiliary electrode in contact with the first electrode (see FIG. 5). On the other hand, in the top emission type organic EL element, since the second electrode is composed of an electrode exhibiting optical transparency, it is preferable to provide an auxiliary electrode in contact with the second electrode.

  The auxiliary electrode 42 is usually opaque because it has a higher thermal conductivity than the electrode with which the auxiliary electrode 42 is in contact. In the case where the opaque auxiliary electrode 42 is provided in contact with the light transmissive electrode, the auxiliary electrode 42 may block light. Therefore, the auxiliary electrode 42 is preferably provided in a region where the light emitting layer 16 does not emit light in principle in a plan view.

  In principle, the light emitting layer 16 can emit light in a region where the first electrode 14 and the second electrode 15 are opposed to each other in plan view (hereinafter also referred to as a facing region). For this reason, the region that does not emit light in principle corresponds to a region excluding the opposing region of the first electrode 14 and the second electrode 15 in plan view. Therefore, it is preferable that the auxiliary electrode 42 is provided in a region excluding a region where the first electrode 14 and the second electrode 15 are opposed in a plan view.

  As the material for the auxiliary electrode, a material having high thermal conductivity is preferably used, and examples thereof include Al, Ag, Cu, Au, and W. An alloy such as Al—Nd and Ag—Pd—Cu may be used for the auxiliary electrode. The thickness of the auxiliary electrode is appropriately set depending on the required thermal diffusion efficiency, and is, for example, 50 nm to 200 μm. The auxiliary electrode may be constituted by a single layer, or may be a laminate in which a plurality of layers are laminated. For example, a predetermined function is exhibited for the purpose of improving adhesion to the support substrate 12 (glass substrate or the like) or the first electrode 14 (ITO thin film or the like) and protecting the metal surface from oxygen or moisture. The layer may be laminated on a thin film made of a material having high thermal conductivity. For example, a laminated body having a structure in which a thin film made of a material having high thermal conductivity is sandwiched between thin films made of Mo, Mo—Nb, Cr, or the like can be used as the auxiliary electrode.

  In addition, although each embodiment mentioned above has shown the light-emitting device by which one series connection was comprised by the some organic EL element, even if it is a light-emitting device by which the some series connection was comprised by the some organic EL element, this book The invention can be suitably applied. Further, the present invention can be suitably applied even to a light-emitting device configured by using both serial connection and parallel connection.

  FIG. 6 is a view showing a light emitting device 61 according to the fourth embodiment of the present invention. The light emitting device 61 of the present embodiment is a light emitting device having a configuration in which two rows of serial connections are connected in parallel. Each series connection includes three organic EL elements connected in series. In two rows of series connections, one end and the other end are electrically connected and connected in parallel.

  Like the light-emitting device 61, depending on the size of the support substrate and the arrangement of the organic EL elements, the heat dissipating part may be installed only in a place where the heat dissipating part can be installed.

  In a light-emitting device in which one series connection is configured by a plurality of organic EL elements, the voltage of a drive source that drives the elements increases as the number of organic EL elements increases. The supply voltage required for the source can be moderately suppressed.

  Below, the structure of the support substrate 12 and the organic EL element 13 is demonstrated in detail.

  As described above, not only the light emitting layer 16 but also a predetermined layer different from the light emitting layer 16 may be further provided between the first and second electrodes 14 and 15. Examples of the layer provided between the cathode and the light emitting layer include an electron transport layer, an electron injection layer, and a hole blocking layer.

  The hole blocking layer has a function of blocking hole transport. In the case where the electron injection layer and / or the electron transport layer have a function of blocking hole transport, these layers may also serve as the hole blocking layer.

  Examples of the layer provided between the anode and the light emitting layer include a hole injection layer, a hole transport layer, and an electron block layer. When both the hole injection layer and the hole transport layer are provided between the anode and the light-emitting layer, the layer in contact with the anode is called a hole injection layer, and the layers other than the hole injection layer are positive. It is called a hole transport layer.

  The hole injection layer has a function of improving hole injection efficiency from the anode. The hole transport layer has a function of improving hole injection from a layer in contact with the surface on the anode side. The electron blocking layer has a function of blocking electron transport. When the hole injection layer and / or the hole transport layer has a function of blocking electron transport, these layers may also serve as an electron blocking layer.

  The electron injection layer and the hole injection layer may be collectively referred to as a charge injection layer, and the electron transport layer and the hole transport layer may be collectively referred to as a charge transport layer.

An example of a layer structure that can be taken by the organic EL element of the present embodiment is shown below.
a) anode / light emitting layer / cathode b) anode / hole injection layer / light emitting layer / cathode c) anode / hole injection layer / light emitting layer / electron injection layer / cathode d) anode / hole injection layer / light emitting layer / Electron transport layer / electron injection layer / cathode e) anode / hole injection layer / hole transport layer / light emitting layer / cathode f) anode / hole injection layer / hole transport layer / light emitting layer / electron injection layer / cathode g ) Anode / hole injection layer / hole transport layer / light emitting layer / electron transport layer / electron injection layer / cathode h) Anode / light emitting layer / electron injection layer / cathode i) Anode / light emitting layer / electron transport layer / electron injection Layer / Cathode (Here, the symbol “/” indicates that the layers sandwiching the symbol “/” are laminated adjacently.
same as below. )

The organic EL element of this embodiment may have two or more light emitting layers. In any one of the layer configurations of a) to i) above, when the laminate sandwiched between the anode and the cathode is referred to as “structural unit A”, the configuration of the organic EL element having two light emitting layers is obtained. The layer configuration shown in j) below can be given. Note that the two (structural unit A) layer structures may be the same or different.
j) Anode / (structural unit A) / charge generation layer / (structural unit A) / cathode

Here, the charge generation layer is a layer that generates holes and electrons by applying an electric field.
Examples of the charge generation layer include a thin film made of vanadium oxide, indium tin oxide (abbreviated as ITO), molybdenum oxide, or the like.

Further, when “(structural unit A) / charge generation layer” is “structural unit B”, the organic EL element having three or more light-emitting layers can have the layer configuration shown in the following k).
k) Anode / (Structural unit B) x / (Structural unit A) / Cathode

  The symbol “x” represents an integer of 2 or more, and “(structural unit B) x” represents a stacked body in which the structural unit B is stacked in x stages. A plurality of (structural units B) may have the same or different layer structure.

  In addition, you may comprise the organic EL element which laminated | stacked the several light emitting layer directly, without providing a charge generation layer.

<Support substrate>
As the support substrate, one that is not chemically changed in the process of manufacturing the organic EL element is suitably used. For example, glass, plastic, a polymer film, a silicon plate, and a laminate of these are used. A drive substrate in which a drive circuit for driving the organic EL element is formed in advance may be used as the support substrate. When a bottom emission type organic EL element configured to emit light through a support substrate is mounted on the support substrate, a substrate exhibiting light transmittance is used as the support substrate.

<Anode and cathode>
At least one of the anode and the cathode is composed of a translucent electrode. As the electrode exhibiting light transmittance, a transparent conductive resin such as metal oxide such as ITO or ZTO, polyaniline or a derivative thereof, polythiophene or a derivative thereof may be used. Such an electrode having optical transparency can be formed by a vacuum deposition method, a sputtering method, an ion plating method, a printing method using ink, an ink jet method, or the like.

  An electrode having high thermal conductivity is used as one of the anode and the cathode. Usually, an electrode material having high thermal conductivity is used as an opaque electrode. As described above, aluminum, copper, silver, gold, iron, silicon, carbon, or the like can be used as the electrode material having high thermal conductivity. Examples of a method for manufacturing an electrode having high thermal conductivity include a vacuum deposition method, a sputtering method, and a laminating method in which a metal thin film is thermocompression bonded.

<Hole injection layer>
As the hole injection material constituting the hole injection layer, metal oxides such as vanadium oxide, molybdenum oxide, ruthenium oxide and aluminum oxide, phenylamine compounds, starburst amine compounds, phthalocyanine systems, amorphous carbon, Examples thereof include polyaniline and polythiophene derivatives.

  Examples of the method for forming the hole injection layer include film formation from a solution containing a hole injection material. For example, a hole injection layer can be formed by coating a film containing a hole injection material by a predetermined coating method and solidifying the solution.

  Solvents used for film formation from solution include chlorine solvents such as chloroform, methylene chloride and dichloroethane, ether solvents such as tetrahydrofuran, aromatic hydrocarbon solvents such as toluene and xylene, and ketones such as acetone and methyl ethyl ketone. Examples thereof include solvents, ester solvents such as ethyl acetate, butyl acetate, and ethyl cellosolve acetate, and water.

  The film thickness of the hole injection layer is appropriately set in consideration of required characteristics and process simplicity, and is, for example, 1 nm to 1 μm, preferably 2 nm to 500 nm, and more preferably 5 nm to 200 nm.

<Hole transport layer>
As the hole transport material constituting the hole transport layer, polyvinylcarbazole or a derivative thereof, polysilane or a derivative thereof, a polysiloxane derivative having an aromatic amine in a side chain or a main chain, a pyrazoline derivative, an arylamine derivative, a stilbene derivative, Triphenyldiamine derivative, polyaniline or derivative thereof, polythiophene or derivative thereof, polyarylamine or derivative thereof, polypyrrole or derivative thereof, poly (p-phenylene vinylene) or derivative thereof, or poly (2,5-thienylene vinylene) or Examples thereof include derivatives thereof.

  Among these, hole transport materials include polyvinyl carbazole or derivatives thereof, polysilane or derivatives thereof, polysiloxane derivatives having aromatic amine compound groups in the side chain or main chain, polyaniline or derivatives thereof, polythiophene or derivatives thereof, poly Polymeric hole transport materials such as arylamine or derivatives thereof, poly (p-phenylene vinylene) or derivatives thereof, or poly (2,5-thienylene vinylene) or derivatives thereof are preferred, and polyvinylcarbazole or derivatives thereof are more preferred. , Polysilane or a derivative thereof, and a polysiloxane derivative having an aromatic amine in the side chain or main chain. In the case of a low-molecular hole transport material, it is preferably used by being dispersed in a polymer binder.

  Examples of the method for forming the hole transport layer include film formation from a solution containing a hole transport material. For example, a hole transport layer can be formed by coating a film containing a hole transport material by a predetermined coating method and solidifying the solution. In the case of a low molecular hole transport material, a film may be formed using a solution in which a polymer binder is further mixed.

  Solvents used for film formation from solution include, for example, chlorinated solvents such as chloroform, methylene chloride and dichloroethane, ether solvents such as tetrahydrofuran, aromatic hydrocarbon solvents such as toluene and xylene, and ketones such as acetone and methyl ethyl ketone. Examples thereof include ester solvents such as system solvents, ethyl acetate, butyl acetate, and ethyl cellosolve acetate.

  As the polymer binder to be mixed, those that do not extremely inhibit charge transport are preferable, and those that weakly absorb visible light are preferably used. For example, polycarbonate, polyacrylate, polymethyl acrylate, polymethyl methacrylate, polystyrene, poly Examples thereof include vinyl chloride and polysiloxane.

  The film thickness of the hole transport layer is appropriately set in consideration of required characteristics and process simplicity, and is, for example, 1 nm to 1 μm, preferably 2 nm to 500 nm, and more preferably 5 nm to 200 nm. .

<Light emitting layer>
The light emitting layer is usually formed of an organic substance that mainly emits fluorescence and / or phosphorescence, or an organic substance and a dopant that assists the organic substance. For example, a dopant is added in order to improve luminous efficiency and change the emission wavelength. The organic substance contained in the light emitting layer may be a low molecular compound or a high molecular compound. Since a high molecular compound having a generally higher solubility in a solvent than a low molecular compound is preferably used in the coating method, the light-emitting layer preferably contains a high molecular compound, and the number average molecular weight in terms of polystyrene as the high molecular compound Preferably contain 10 ³ to 10 ⁸ compounds. Examples of the light emitting material constituting the light emitting layer include the following dye materials, metal complex materials, polymer materials, and dopant materials.

(Dye material)
Examples of dye-based materials include cyclopentamine derivatives, tetraphenylbutadiene derivative compounds, triphenylamine derivatives, oxadiazole derivatives, pyrazoloquinoline derivatives, distyrylbenzene derivatives, distyrylarylene derivatives, pyrrole derivatives, thiophene ring compounds. Pyridine ring compounds, perinone derivatives, perylene derivatives, oligothiophene derivatives, oxadiazole dimers, pyrazoline dimers, quinacridone derivatives, coumarin derivatives, and the like.

(Metal complex materials)
Examples of the metal complex material include rare earth metals such as Tb, Eu, and Dy, or Al, Zn, Be, Ir, Pt, etc. as a central metal, and oxadiazole, thiadiazole, phenylpyridine, phenylbenzimidazole, quinoline. Examples include metal complexes having structures as ligands, such as iridium complexes, platinum complexes and other metal complexes that emit light from triplet excited states, aluminum quinolinol complexes, benzoquinolinol beryllium complexes, benzoxazolyl zinc A complex, a benzothiazole zinc complex, an azomethylzinc complex, a porphyrin zinc complex, a phenanthroline europium complex, and the like can be given.

(Polymer material)
As polymer materials, polyparaphenylene vinylene derivatives, polythiophene derivatives, polyparaphenylene derivatives, polysilane derivatives, polyacetylene derivatives, polyfluorene derivatives, polyvinyl carbazole derivatives, the above dye materials and metal complex light emitting materials are polymerized. You can give things.

  Among the light emitting materials, examples of the material that emits blue light include distyrylarylene derivatives, oxadiazole derivatives, and polymers thereof, polyvinylcarbazole derivatives, polyparaphenylene derivatives, and polyfluorene derivatives. Of these, polymer materials such as polyvinyl carbazole derivatives, polyparaphenylene derivatives, and polyfluorene derivatives are preferred.

  Examples of materials that emit green light include quinacridone derivatives, coumarin derivatives, and polymers thereof, polyparaphenylene vinylene derivatives, polyfluorene derivatives, and the like. Of these, polymer materials such as polyparaphenylene vinylene derivatives and polyfluorene derivatives are preferred.

Examples of materials that emit red light include coumarin derivatives, thiophene ring compounds, and polymers thereof, polyparaphenylene vinylene derivatives, polythiophene derivatives, and polyfluorene derivatives. Among these, polymer materials such as polyparaphenylene vinylene derivatives, polythiophene derivatives, and polyfluorene derivatives are preferable.
(Dopant material)
Examples of the dopant material include perylene derivatives, coumarin derivatives, rubrene derivatives, quinacridone derivatives, squalium derivatives, porphyrin derivatives, styryl dyes, tetracene derivatives, pyrazolone derivatives, decacyclene, phenoxazone, and the like. In addition, the thickness of such a light emitting layer is usually about 2 nm-200 nm.

  The light emitting layer is formed, for example, by film formation from a solution. For example, a light emitting layer is formed by applying a solution containing a light emitting material by a predetermined application method and further solidifying the solution. Examples of the solvent used for film formation from a solution include the same solvents as those used for forming a hole injection layer from the aforementioned solution.

<Electron transport layer>
As an electron transport material constituting the electron transport layer, an oxadiazole derivative, anthraquinodimethane or a derivative thereof, benzoquinone or a derivative thereof, naphthoquinone or a derivative thereof, anthraquinone or a derivative thereof, tetracyanoanthraquinodimethane or a derivative thereof, Examples include fluorenone derivatives, diphenyldicyanoethylene or derivatives thereof, diphenoquinone derivatives, or metal complexes of 8-hydroxyquinoline or derivatives thereof, polyquinoline or derivatives thereof, polyquinoxaline or derivatives thereof, polyfluorene or derivatives thereof, and the like.

  Examples of the method for forming the electron transport layer include a vapor deposition method and a film formation method from a solution. In the case of forming a film from a solution, a polymer binder may be used in combination.

  The film thickness of the electron transport layer is appropriately set in consideration of required characteristics and process simplicity, and is, for example, 1 nm to 1 μm, preferably 2 nm to 500 nm, more preferably 5 nm to 200 nm.

<Electron injection layer>
The material constituting the electron injection layer includes alkali metal, alkaline earth metal, an alloy containing at least one of alkali metal and alkaline earth metal, oxide of alkali metal or alkaline earth metal, halide, carbonic acid A salt or a mixture of these substances can be used. Examples of alkali metals, alkali metal oxides, halides, and carbonates include lithium, sodium, potassium, rubidium, cesium, lithium oxide, lithium fluoride, sodium oxide, sodium fluoride, potassium oxide, potassium fluoride , Rubidium oxide, rubidium fluoride, cesium oxide, cesium fluoride, lithium carbonate, and the like. Examples of alkaline earth metals, alkaline earth metal oxides, halides and carbonates include magnesium, calcium, barium, strontium, magnesium oxide, magnesium fluoride, calcium oxide, calcium fluoride, barium oxide, Examples thereof include barium fluoride, strontium oxide, strontium fluoride, and magnesium carbonate. An electron injection layer may be comprised by the laminated body which laminated | stacked two or more layers, for example, LiF / Ca etc. can be mentioned. The electron injection layer is formed by vapor deposition, sputtering, printing, or the like. The thickness of the electron injection layer is preferably about 1 nm to 1 μm.

DESCRIPTION OF SYMBOLS 1 Organic EL element 2 Light-emitting device 3 Support substrate 4 1st electrode 5 2nd electrode 6 Light-emitting layer 11 Light-emitting device 12 Support substrate 13 Organic EL element 14 1st electrode 15 2nd electrode 16 Light-emitting layer 17, 18 Extension part 19 Connection Part 20 Heat radiation part 31 Light emitting device 32,33 Site 41 Light emitting device 42 Auxiliary electrode 61 Light emitting device

Claims (8)

A light emitting device comprising: a support substrate; and a plurality of organic electroluminescence elements provided on the support substrate along a predetermined arrangement direction and connected in series,
Each organic electroluminescence element includes a pair of electrodes and a light emitting layer provided between the electrodes,
The light emitting layer extends along the predetermined arrangement direction across the plurality of organic electroluminescence elements,
Each of the pair of electrodes extends so as to protrude from the light emitting layer in a width direction perpendicular to both the thickness direction of the support substrate and the arrangement direction when viewed from one thickness direction of the support substrate. Part
One electrode of the pair of electrodes extends from the extending portion to the other electrode of the organic electroluminescence element adjacent in the arrangement direction and is connected to the other electrode. Further comprising
Any one electrode of the pair of electrodes extends from the extension portion and / or the connection portion in a direction away from the light emitting layer rather than an end portion of the electrode paired with the one electrode. A light emitting device including a heat radiating unit.   The extension portion, as viewed from one side in the thickness direction, has a first extension portion that extends from the light emitting layer to one side in the width direction, and projects from the light emitting layer to the other side in the width direction. The light emitting device according to claim 1, further comprising a second extending portion that extends.   The light emitting device according to claim 1, wherein one electrode including the heat radiating unit has a larger value obtained by integrating the film thickness to the thermal conductivity than an electrode paired with the one electrode. An auxiliary electrode provided in contact with the electrode;
The light emitting device according to claim 1, wherein the auxiliary electrode has higher thermal conductivity than an electrode in contact with the auxiliary electrode.   The light-emitting device according to claim 1, wherein the heat dissipation unit has a thermal conductivity of 30 W / (m · K) or more.   The light-emitting device according to claim 1, wherein the heat dissipation portion has a thickness of 100 nm or more. A light-emitting device comprising a support substrate and a plurality of organic electroluminescence elements provided in series along a predetermined arrangement direction and connected in series, each organic electroluminescence element comprising a pair of electrodes, A light-emitting layer provided between the electrodes, the light-emitting layer extending along the predetermined arrangement direction across the plurality of organic electroluminescence elements, and the pair of electrodes, An extension portion extending so as to protrude from the light emitting layer in a width direction perpendicular to both the thickness direction of the support substrate and the arrangement direction when viewed from one thickness direction of the support substrate, One electrode of the electrodes extends in the arrangement direction from the extending portion to the other electrode of the organic electroluminescence element adjacent in the arrangement direction, The electrode further includes a connection portion connected to the electrode, and any one of the pair of electrodes is in a direction away from the light emitting layer than an end portion of the electrode paired with the one electrode. A method for manufacturing a light emitting device comprising a heat radiating part extending from the extending part and / or the connecting part,
The step of forming the light emitting layer by solidly applying the ink containing the material to be the light emitting layer along the predetermined arrangement direction across the plurality of organic EL elements and solidifying the applied coating film. A manufacturing method of a light emitting device including the same.   The method for manufacturing a light-emitting device according to claim 7, wherein a method of applying the ink is a cap coating method, a slit coating method, a spray coating method, or a printing method.

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