JP2014154269A - Light-emitting element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting element capable of suppressing variations in light emission efficiency among light-emitting elements with more simple configuration.SOLUTION: A light-emitting element 10 includes a conductor pattern 140 provided on a translucent substrate 100. The conductor pattern 140 is arranged apart from a first electrode 110. This conductor pattern 140 is electrically connected to a second electrode 130 without passing through an organic functional layer 120. When brightness is adjusted, the conductor pattern 140 is cut.

Description

  The present invention relates to a light emitting element.

  In recent years, a material using an organic material for a light emitting layer of a light emitting element has been used. In such a light-emitting element, the light-emitting characteristics of the light-emitting layer, for example, light emission efficiency (cd / A) (= luminance / current density) may vary depending on the manufacturing process and the material of the light-emitting layer. .

  Patent Document 1 discloses a light emitting module that suppresses variations in light output. This light emitting module generates a pair of power supply terminals that are formed on a substrate and supplies power to the light emitting element, and an output having a predetermined relationship with the light output of the light emitting element when power is supplied to the power supply terminal. And an output detection terminal. The output detection terminal generates an output having a predetermined relationship with respect to the light output of the light emitting element when power is supplied to the power supply terminal. For this reason, it is said that the light emitting element can be turned on with a desired light output simply by providing a control circuit and performing feedback control for controlling the power supplied to the light emitting element based on the output of the output detection terminal.

JP 2009-54426 A

  In the light emitting module disclosed in Patent Document 1, it is necessary to perform feedback control on the control circuit side, which causes a problem that the device configuration is complicated.

  An example of a problem to be solved by the present invention is to suppress variation in light emission efficiency between light emitting devices with a simpler configuration.

The invention described in claim 1
A light emitting part having a first electrode, a second electrode, an organic functional layer sandwiched between the first electrode and the second electrode and including a light emitting layer,
A conductor pattern provided in parallel in the light emitting portion,
The second electrode covers the first electrode and the conductor pattern,
The conductor pattern is a light emitting element that is spaced apart from the first electrode and is electrically connected to the second electrode.
The invention described in claim 6
A first electrode;
A plurality of auxiliary electrodes provided on the first electrode and having a lower electrical resistance than the first electrode;
A second electrode;
An organic functional layer including a light emitting layer provided between the first electrode and the second electrode;
Among the plurality of auxiliary electrodes, a light emitting element in which some of the auxiliary electrodes are divided.

It is sectional drawing of the light emitting element concerning 1st embodiment, and is sectional drawing of the II direction of FIG. It is a top view which shows arrangement | positioning of the electrode of a light emitting element, and a conductor pattern. 3A and 3B are cross-sectional views of the light-emitting element, in which FIG. 2A is a cross-sectional view in the AA direction in FIG. 2, and FIG. 2B is a cross-sectional view in the BB direction in FIG. It is a figure which shows the relationship between a light emission part and a conductor pattern. It is sectional drawing of the light emitting element of 2nd embodiment, and is sectional drawing of the VV direction of FIG. It is a top view which shows arrangement | positioning of the electrode of a light emitting element, and a conductor pattern. It is sectional drawing of a light emitting element, and is sectional drawing of the VII-VII direction of FIG. It is sectional drawing of the light emitting element concerning an Example, and is sectional drawing of the VIII-VIII direction of FIG. It is a top view which shows arrangement | positioning of the electrode of a light emitting element, and a conductor pattern. 9A is a cross-sectional view of the light-emitting element, FIG. 9A is a cross-sectional view in the direction of AA in FIG. 9, FIG. 9B is a cross-sectional view in the direction of BB in FIG. It is sectional drawing of CC direction of 9.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.
(First embodiment)
The first embodiment will be described with reference to FIGS.
FIG. 1 is a cross-sectional view orthogonal to the substrate surface of the translucent substrate 100 of the light-emitting element 10, and is a cross-sectional view in the II direction of FIG. FIG. 2 is a plan view showing the arrangement of the electrodes 110 and 130 and the conductor pattern 140 of the light emitting element 10. 3 is a cross-sectional view along the longitudinal direction of the conductor pattern 140 of the light-emitting element 10, FIG. 3A is a cross-sectional view along the AA direction of FIG. 2, and FIG. It is sectional drawing along a direction. FIG. 4 is a diagram illustrating a relationship between the light emitting unit and the conductor pattern.

The light emitting element 10 of this embodiment can be used as a display or a lighting device, for example.
The light emitting element 10 includes a translucent substrate 100, a first electrode 110, an organic functional layer 120, a second electrode 130, and a conductor pattern 140.
The first electrode 110 is a transparent electrode provided on one substrate surface of the translucent substrate 100, and is an anode in this embodiment. For example, the first electrode 110 can be selected from any metal oxide of ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), and SnO ₂ .

A conductor pattern 140 is provided on one substrate surface of the translucent substrate 100. The conductor pattern 140 is spaced apart from the first electrode 110.
The conductor pattern 140 can be selected from any metal oxide of ITO, IZO, and SnO ₂ . Among these, it is preferable that the first electrode 110 is made of the same material.
The conductor pattern 140 is covered with an insulating film 160, and the conductor pattern 140 and an organic functional layer 120 described later are electrically insulated.

The organic functional layer 120 integrally covers the first electrode 110 and the conductor pattern 140. The organic functional layer 120 includes a light emitting layer 123. Specifically, the organic functional layer 120 is formed by stacking a hole injection layer 121, a hole transport layer 122, a light emitting layer 123, an electron transport layer 124, and an electron injection layer 125 in this order. Note that instead of the hole injection layer 121 and the hole transport layer 122, a single layer having the functions of these two layers may be provided. Similarly, instead of the electron transport layer 124 and the electron injection layer 125, a single layer having the functions of these two layers may be provided.
Moreover, the organic functional layer 120 is not limited to these, and may include layers having other functions in addition to the above.

  A second electrode 130 is provided on the surface of the organic functional layer 120 opposite to the surface on the first electrode 110 side. The second electrode 130 integrally covers the first electrode 110 and the conductor pattern 140. The organic functional layer 120 is sandwiched between the second electrode 130 and the first electrode 110. In the present embodiment, the second electrode 130 is a cathode.

Here, the arrangement of the first electrode 110, the second electrode 130, and the conductor pattern 140 will be described with reference to FIGS. Although FIG. 2 is a plan view, hatching is provided so that the arrangement of the first electrode 110 and the conductor pattern 140 can be understood.
On the translucent substrate 100, a power supply terminal (not shown) connected to the first electrode 110 and connected to the anode of the power source is formed. A wiring 171 connected to the power supply terminal is formed on the translucent substrate 110.

  In addition, a power supply terminal (not shown) connected to the second electrode 130 and connected to the cathode of the power source is formed on the translucent substrate 100. A wiring 172 connected to the cathode power supply terminal (not shown) is formed on the translucent substrate 110.

The first electrode 110 is electrically connected to the wiring 171 through a lead line 173 from the wiring 171. On the other hand, the first electrode 110 is separated from the wiring 172.
The lead wire 173 can be made of the same material as the conductor pattern 140. In addition, since a large current flows through the wiring 171 and the wiring 172, it is preferable that the wiring 171 and the wiring 172 are formed of a metal material or a metal material is stacked over an electrode formed of a metal oxide.
As shown in FIG. 3A, there is a region where the organic functional layer 120 is not provided on the end portion of the first electrode 110 on the wiring 172 side. An insulating film is formed so as to cover this region. 161 is provided. The insulating film 161 is formed across the end of the first electrode 110 on the wiring 172 side and the region of the wiring 172 on the first electrode 110 side. The insulating film 161 may be configured integrally with the insulating film 160 that covers the conductor pattern 140 or may be a separate body.

The second electrode 130 extends from the organic functional layer 120 over the insulating film 161 toward the wiring 172 from the first electrode 110 side, and is in direct contact with the wiring 172. By providing the insulating film 161, contact between the end of the first electrode 110 on the wiring 172 side and the end of the second electrode 130 on the wiring 172 side is prevented.
In addition, since the organic functional layer 120 is interposed between the end of the first electrode 110 on the wiring 171 side and the end of the second electrode 130 on the wiring 171 side, these ends are short-circuited. Never do. The end of the first electrode 110 on the wiring 171 side is covered with an insulating film to prevent contact between the end of the first electrode 110 on the wiring 171 side and the end of the second electrode 130 on the wiring 171 side. May be.
That is, the second electrode 130 and the first electrode 110 are not short-circuited and are connected via the organic functional layer 120.

On the other hand, as shown in FIG. 2, the conductor pattern 140 protrudes closer to the wiring 172 than the first electrode 110 and is directly connected to the wiring 172. The conductor pattern 140 is also directly connected to the wiring 171. The conductor pattern 140, for example, can be selected ITO, IZO, from any of the metal oxide SnO _2.

As shown in FIG. 3B, the second electrode 130 extends from the organic functional layer 120 side toward the wiring 172, and the conductor pattern 140 is directly connected to the wiring 172 to which the second electrode 130 is directly connected. You can see that they are touching. Therefore, the second electrode 130 is electrically connected to the conductor pattern 140 and is short-circuited. In other words, the conductor pattern 140 is electrically connected to the second electrode 130 without passing through the organic functional layer 120.
Here, the conductive pattern 140 being electrically connected to the second electrode 130 means that at least a part of the conductive pattern 140 may be directly connected to the second electrode 130, or at least one of the conductive patterns 140. The part may be directly connected to a conductor (for example, the wiring 172) directly connected to the second electrode 130.
FIG. 3B shows the case where the organic functional layer 120 is provided on the conductor pattern 140 for the stability of the manufacturing process. However, the organic functional layer 120 is not necessarily provided on the conductor pattern 140 and is not provided. Even in the case, the same effect can be obtained.

  In such a light emitting element 10, as shown in FIG. 4, the conductor pattern 140 is electrically connected to the light emitting part L composed of the first electrode 110, the second electrode 130, and the organic functional layer 120. It will be arranged in parallel.

Here, a current flow in the light emitting element 10 will be described.
The current supplied from the power source to the wiring 171 is supplied to the first electrode 110 through the lead line 173. Thereafter, the first electrode 110 flows to the second electrode 130 through the organic functional layer 120, and the second electrode 130 flows to the wiring 172.
On the other hand, part of the current supplied from the power source to the wiring 171 flows through the conductor pattern 140 and flows from the conductor pattern 140 to the wiring 172. Since the insulating film 160 is provided on the conductor pattern 140, no current flows from the conductor pattern 140 to the organic functional layer 120.

  When the luminance of the light emitting element 10 is adjusted, the conductor pattern 140 is physically cut. For example, a region surrounded by a dotted line in FIG. 2 in the conductor pattern 140 is physically cut with a laser or the like. As a result, no current flows through the cut conductor pattern 140, and the current flowing through the light emitting portion L, in other words, the organic functional layer 120 increases. Thereby, the organic functional layer 120 emits light more brightly, and the luminance of the light emitting element 10 can be adjusted.

Such a light emitting device 10 can be manufactured as follows.
On the translucent substrate 100, the first electrode 110, the conductor pattern 140, the wirings 171 and 172, and the lead line 173 are formed. For example, the first electrode 110, the conductor pattern 140, the wirings 171 and 172, and the lead line 173 can be provided by forming a film by vapor deposition or sputtering and patterning the film by etching.
Thereafter, an insulating film 160 and an insulating film 161 covering the conductor pattern 140 are provided. Furthermore, the organic functional layer 120 and the second electrode 130 are provided.
Then, if necessary, the conductor pattern 140 is fused with a laser or the like, and the conductor pattern 140 is physically cut.

Next, the effect of this embodiment is demonstrated.
As described above, in the present embodiment, the conductor pattern 140 is electrically arranged in parallel with the light emitting portion L, and the second electrode 130 and the conductor pattern 140 are short-circuited. Therefore, by electrically cutting the conductor pattern 140, the current flowing through the light emitting portion L can be adjusted, and the luminance of the light emitting element 10 can be adjusted.
In addition, since the conductor pattern 140 is electrically connected to the second electrode 130 without passing through the organic functional layer 120, the organic functional layer 120 does not emit light on the conductor pattern 140. Therefore, even if the conductor pattern 140 is cut, the luminance on the conductor pattern 140 does not change, the emission intensity of the organic functional layer 120 on the first electrode 110 is increased, and the luminance of the entire light emitting element 10 can be increased.
Since the luminance of the light emitting element 10 can be adjusted by cutting the conductor pattern 140, the luminance can be easily adjusted. In addition, since the luminance can be adjusted by cutting the conductor pattern 140, the element configuration of the light emitting element 10 can be simplified as compared with the case where the control circuit is provided and the luminance is adjusted as in Patent Document 1.

  The second electrode 130 integrally covers the first electrode 110 and the conductor pattern 140. Thereby, formation of the 2nd electrode 130 becomes easy.

  Furthermore, the conductor pattern 140 and the first electrode 110 can be formed simultaneously by configuring the conductor pattern 140 with the same material as the first electrode 110. Thereby, complication of a manufacturing process can be suppressed.

(Second embodiment)
With reference to FIGS. 5-7, the light emitting element 20 of this embodiment is demonstrated.
FIG. 5 is a cross-sectional view of the light-emitting element 20, and is a cross-sectional view in a direction orthogonal to the longitudinal direction of the auxiliary electrode 150. FIG. 6 is a plan view of the light emitting element 20, and is a diagram showing a positional relationship between the first electrode 110, the auxiliary electrode 150, the wirings 171, 172, and the second electrode 130. 5 is a cross-sectional view in the VV direction of FIG. FIG. 7 is a cross-sectional view in the VII-VII direction of FIG.

The light emitting element 20 includes a translucent substrate 100, a first electrode 110, an auxiliary electrode 150, an organic functional layer 120, and a second electrode 130. The light emitting element 20 does not include the conductor pattern 140. Other points are the same as in the first embodiment.
A plurality of auxiliary electrodes 150 are arranged in stripes on the first electrode 110. The auxiliary electrode 150 has a smaller electrical resistance than the first electrode 110. Similar to the first electrode 110, the auxiliary electrode 150 is not short-circuited to the second electrode 130.
Each of the auxiliary electrodes 150 is covered with an insulating film 160. However, the first electrode 110 is exposed between the insulating films 160 covering the auxiliary electrode 150, and the exposed first electrode 110 is in direct contact with the organic functional layer 120.

As shown in FIGS. 6 and 7, the end portion (one end portion in the longitudinal direction) of the auxiliary electrode 150 on the wiring 171 side is directly connected to the wiring 171 and is made of the same material as the wiring 171. Although FIG. 6 is a plan view, hatching is provided so that the arrangement of the auxiliary electrodes 150 can be understood.
The other end in the longitudinal direction of the auxiliary electrode 150 is not connected to the wiring 172. As shown in FIG. 7, an insulating film 161 is provided between the wiring 172 side end of the first electrode 110 and the wiring 172 and between the wiring 172 side end of the auxiliary electrode 150 and the wiring 172. Are provided to prevent a short circuit between the first electrode 110 and the second electrode 130 and a short circuit between the auxiliary electrode 150 and the second electrode 130. The insulating film 161 is formed integrally with the insulating film 160 and is made of the same material.

The other end of the auxiliary electrode 150 on the wiring 171 side extends outward from the first electrode 110. The organic functional layer 120 and the second electrode 130 are not provided on the other end of the auxiliary electrode 150.
In the light emitting element 20, as shown in FIG. 6, the other end of some of the auxiliary electrodes 150 is physically cut with a laser or the like.

Here, a current flow in the light emitting element 20 will be described.
The current supplied from the power source to the wiring 171 is supplied to the first electrode 110 through the auxiliary electrode 150. A current flows from the first electrode 110 to the organic functional layer 120, and further flows to the wiring 172 through the second electrode 130.
Here, by cutting the other end of some of the auxiliary electrodes 150, it becomes difficult for current to flow in and around the portion of the first electrode 110 that is in contact with some of the auxiliary electrodes 150. Thereby, the brightness | luminance of a part of organic functional layer 120 falls, and the brightness | luminance of the light emitting element 20 can be reduced. The luminance of the light emitting element 20 can be adjusted by the number of auxiliary electrodes 150 to be cut. Since the luminance of the light emitting element 20 can be adjusted by cutting the auxiliary electrode 150 in this manner, the luminance can be easily adjusted. Further, since the luminance of the light emitting element 20 can be adjusted by cutting the auxiliary electrode 150, the element configuration of the light emitting element 20 is not complicated as compared with the case where a control circuit for adjusting the luminance is provided.

Example 1
Next, Example 1 will be described with reference to FIGS.
FIG. 8 is a cross-sectional view of the light-emitting element 30 and is a cross-sectional view in a direction orthogonal to the longitudinal direction of the auxiliary electrode 150. FIG. 9 is a plan view of the light emitting element 30 and shows a positional relationship among the first electrode 110, the conductor pattern 140A, the auxiliary electrode 150, the wirings 171 and 172, and the second electrode 130. FIG. 10 is a cross-sectional view along the longitudinal direction of the auxiliary electrode 150 of FIG.

  The light emitting element 30 includes an auxiliary electrode 150. Moreover, it has the conductor pattern 140A. In this embodiment, the conductor pattern 140A is connected to the wirings 171 and 172 and short-circuited with the second electrode 130. Further, the auxiliary electrode 150 and the conductor pattern 140A are covered with an insulating film 160. Other points are the same as in the first embodiment.

  The light emitting element 30 includes the translucent substrate 100 as in the above embodiment. The translucent substrate 100 is made of glass, for example.

On the translucent substrate 100, a plurality of first electrodes 110 are spaced apart. On the first electrode 110, an auxiliary electrode 150 made of a material having a lower electrical resistance than the first electrode 110 is provided. At least one auxiliary electrode 150 is provided on each first electrode 110 and is arranged in stripes. As the auxiliary electrode 150, for example, a metal film such as Ag or Al can be used.
Each auxiliary electrode 150 is covered with an insulating film 160. However, the first electrode 110 is exposed between the insulating films 160 and is in direct contact with the organic functional layer 120.

  A conductor pattern 140 </ b> A is provided between the pair of first electrodes 110. The conductor pattern 140 </ b> A is separated from the first electrode 110. In the present embodiment, the conductor patterns 140A and the first electrodes 110 are alternately arranged, and the first electrodes 110 are arranged between the conductor patterns 140A.

The conductor pattern 140 </ b> A includes a first conductor portion 141 and a second conductor portion 142 provided on the first conductor portion 141 so as to overlap the first conductor portion 141.
The first conductor portion 141 can be selected from any metal oxide of ITO, IZO, and SnO ₂ . Among these, it is preferable that the first electrode 110 is made of the same material.

The second conductor portion 142 has a lower electrical resistance than the first conductor portion 141. The second conductor portion 142 is preferably made of the same material as the auxiliary electrode 150.
Here, the conductor pattern 140 </ b> A is covered with the insulating film 160. The insulating film 160 insulates the first conductor portion 141 and the second conductor portion 142 of the conductor pattern 140A from the organic functional layer 120.

The hole injection layer 121 of the organic functional layer 120 is in direct contact with the first electrode 110 exposed between the insulating films 160. A second electrode 130 is provided on the surface of the organic functional layer 120 opposite to the surface on the first electrode 110 side. The organic functional layer 120 and the second electrode 130 integrally cover the plurality of first electrodes 110 and the conductor pattern 140.
The plurality of first electrodes 110 and the plurality of conductor patterns 140 are located in the effective light emitting region of the light emitting element 10.

Next, the positional relationship between the first electrode 110 and the second electrode 130 will be described with reference to FIGS. Although FIG. 9 is a plan view, hatching is provided so that the arrangement of the auxiliary electrode 150 and the conductor pattern 140 can be understood.
As shown in FIG. 9, the first electrode 110 is separated from the wiring 172 and the wiring 171. FIG. 10A is a cross-sectional view taken along the line AA in FIG. 9, and as illustrated in FIG. 10A, an insulating film 161 is disposed between the first electrode 110 and the wiring 172. The insulating film 161 covers the end of the first electrode 110 on the wiring 172 side and covers the end of the wiring 172 on the first electrode 110 side. The second electrode 130 extends from the first electrode 110 side toward the wiring 172 and is in direct contact with the wiring 172 across the insulating film 161, but the insulating film 161 causes the second electrode 130 to A short circuit with one electrode 110 is prevented.

The organic functional layer 120 is disposed between the end of the first electrode 110 on the wiring 171 side and the end of the second electrode 130 on the wiring 171 side, and these end portions do not contact each other. . The end of the first electrode 110 on the wiring 171 side is covered with an insulating film to prevent contact between the end of the first electrode 110 on the wiring 171 side and the end of the second electrode 130 on the wiring 171 side. May be.
Therefore, the second electrode 130 and the first electrode 110 are not short-circuited and are electrically connected via the organic functional layer 120.

Next, the arrangement of the auxiliary electrode 150 will be described with reference to FIGS.
The auxiliary electrode 150 extends along the substrate surface of the translucent substrate 100, but one end portion in the longitudinal direction protrudes from the first electrode 110 toward the wiring 171, and the auxiliary electrode 150 extends to the wiring 171. Connected directly. Note that the other end of the auxiliary electrode 150 does not protrude from the first electrode 110 and is not connected to the wiring 172. Further, the other end of the auxiliary electrode 150 and the wiring 172 are not in contact with each other and are not short-circuited.
FIG. 10B is a cross-sectional view in the BB direction of FIG. 9, but as illustrated in FIG. 10B, between the other end in the longitudinal direction of the auxiliary electrode 150 and the wiring 172. The insulating film 161 is disposed, and the insulating film 161 covers the other end of the auxiliary electrode 150 in the longitudinal direction and the end of the wiring 172 on the auxiliary electrode 150 side. The insulating film 161 may be integrally formed with the insulating film 160 that covers the auxiliary electrode 150 along the longitudinal direction thereof.

  The second electrode 130 extends from the auxiliary electrode 150 side toward the wiring 172 and is in direct contact with the wiring 172 over the insulating film 161. However, the insulating film 161 causes the auxiliary electrode 150 and the second electrode 130 to be in contact with each other. Short circuit with 130 is prevented.

Furthermore, the conductor pattern 140A will be described with reference to FIGS.
The conductor pattern 140 </ b> A extends along the substrate surface of the translucent substrate 100. The second conductor portion 142 is disposed so that both ends of the first conductor pattern 141 in the longitudinal direction overlap the second conductor portion 142. The pair of second conductor portions 142 are disposed on the first conductor pattern 141 so as to be separated from each other.
One second conductor portion 142 has one end in the longitudinal direction connected to the first conductor pattern 141 and the other end connected directly to the wiring 171. The organic functional layer 120, the second electrode 130, and the insulating film 160 are provided on the other end portion in the longitudinal direction of the one second conductor portion 142 in a plan view from the substrate surface side of the translucent substrate 100. Not.

  The other second conductor portion 142 has one end in the longitudinal direction connected to the first conductor pattern 141 and the other end connected directly to the wiring 172.

  In the present embodiment, the wiring 172 is made of a metal film such as Ag or Al, and is integrally formed with the other second conductor portion 142 connected to the wiring 172. Note that the wiring 171 can also be formed of a metal film such as Ag or Al, and may be integrally formed with one second conductor portion 142 or the auxiliary electrode 150 connected to the wiring 171.

FIG. 10C is a cross-sectional view in the CC direction of FIG. 9, but the second electrode 130 is formed from the end of the organic functional layer 120 on the wiring 172 side, as shown in FIG. It extends toward the wiring 172 side and is in direct contact with the wiring 172 and the second conductor portion 142. Therefore, the second electrode 130 and the conductor pattern 140A are short-circuited. That is, the conductor pattern 140A is electrically connected to the second electrode 130 without passing through the organic functional layer 120.
The organic functional layer 120 is interposed between the end of the conductor pattern 140A on the wiring 171 side and the end of the second electrode 130 on the wiring 171 side, and these ends are not in contact with each other.

In such a light emitting element 10, the current from the power source is supplied to the auxiliary electrode 150 and the second conductor portion 142 through the wiring 171.
The current from the auxiliary electrode 150 flows to the first electrode 110 and flows to the second electrode 130 through the organic functional layer 120. Thereby, in the organic functional layer 120, a region sandwiched between the first electrode 110 and the second electrode 130 emits light.

  On the other hand, since the conductor pattern 140A is short-circuited with the second electrode 130 and insulated from the organic functional layer 120, the current flowing through the second conductor portion 142 hardly flows to the organic functional layer 120 side. Then, it flows on the conductor pattern 140A. Then, a current flows from the conductor pattern 140A to the wiring 172. Accordingly, the portion of the organic functional layer 120 located on the conductor pattern 140A does not emit light.

Here, in order to adjust the luminance of the light emitting element 10, the conductor pattern 140A is cut. For example, among the pair of second conductor portions 142 of the conductor pattern 140A, the second conductor portion 142 directly connected to the wiring 171 is cut. For example, the second conductor portion 142 can be divided by a laser or the like.
As a result, the current flowing through the conductor pattern 140A is interrupted, and the current flowing through the auxiliary electrode 150 to the first electrode 110 is increased. Therefore, the organic functional layer 120 emits light more brightly, and the luminance of the light emitting element 10 can be adjusted.

Such a light emitting device 10 can be manufactured as follows.
A first electrode 110 and a first conductor portion 141 are provided on the translucent substrate 100. For example, the first electrode 110 and the first conductor portion 141 can be provided by forming a film by vapor deposition or sputtering and patterning the film by etching.
Next, the auxiliary electrode 150, the second conductor portion 142, and the wirings 171 and 172 are provided. For example, the auxiliary electrode 150, the second conductor portion 142, and the wirings 171 and 172 can be provided by forming a film by vapor deposition or sputtering and patterning the film by etching.
After that, insulating films 160 and 161 are provided. The insulating films 160 and 161 can be made of a photosensitive resin such as polyimide, and are patterned into a desired pattern by exposing and developing the photosensitive resin. In each of the embodiments described above, the insulating films 160 and 161 can be made of a photosensitive resin such as polyimide.

Next, the organic functional layer 120 is provided. The organic functional layer 120 may be formed by an evaporation method or may be formed by a coating method.
Thereafter, the second electrode 130 is formed on the organic functional layer 120.

In this example, the same effects as those of the first embodiment can be obtained, and the following effects can be obtained.
In the present embodiment, the first electrodes 110 are arranged between the conductor patterns 140A without arranging the conductor patterns 140A adjacent to each other. Since the first electrode 110 is a light emitting region, the non-light emitting region on the conductor pattern 140A can be made inconspicuous.

  Furthermore, by configuring the first conductor portion 141 of the conductor pattern 140A with the same material as the first electrode 110, the first conductor portion 141 and the first electrode 110 can be formed simultaneously. In addition, by forming the second conductor portion 142 from the same material as the auxiliary electrode 150, the second conductor portion 142 and the auxiliary electrode 150 can be formed simultaneously.

  On the other end in the longitudinal direction of the second conductor portion 142 disposed on the wiring 171 side (on the end on the wiring 171 side) in a plan view from the substrate surface side of the translucent substrate 100, the organic function The layer 120, the second electrode 130, and the insulating film 160 are not provided. When the luminance of the light emitting element 30 is adjusted, the other end portion of the second conductor portion 142 may be cut, so that the conductor pattern 140A can be easily cut.

  Furthermore, in this embodiment, the conductor pattern 140A and the organic functional layer 120 are electrically insulated by the insulating film 160. Thereby, in the state which has not cut | disconnected the conductor pattern 140A, the area | region on the conductor pattern 140A can be reliably made into the non-light-emitting area | region among the organic functional layers 120. FIG. When the organic functional layer 120 on the conductor pattern 140A emits a slight amount of light without cutting the conductor pattern 140A, the organic functional layer 120 on the conductor pattern 140A emits light by cutting the conductor pattern 140A. The non-light-emitting state is brought about from the state where the light has been emitted. In the organic functional layer 120 on the conductor pattern 140A, the luminance is lowered. Therefore, it is necessary to adjust the luminance of the entire light emitting element 10 in consideration of the lowering of the luminance. It will be difficult to make an accurate adjustment. On the other hand, if the organic functional layer 120 on the conductor pattern 140A is previously set as a non-light emitting region in a state where the conductor pattern 140A is not cut, it is easy to adjust the luminance of the entire light emitting element 10.

  Moreover, since the brightness | luminance of each light emitting element 30 can be adjusted, even if it connects the several light emitting element 30 in series, the brightness | luminance of each light emitting element 30 can be made comparable.

As mentioned above, although embodiment and the Example were described with reference to drawings, these are illustrations of this invention and can also employ | adopt various structures other than the above.
For example, in Example 1, the conductor pattern 140A is covered with the insulating film 160, but the insulating film 160 may not be provided. In this case, the conductor pattern 140A is in direct contact with the organic functional layer 120.

In the second embodiment and Example 1, the organic functional layer 120 may not be on the conductor patterns 140 and 140A. For example, in the second embodiment, an organic functional layer may be provided between the insulating films 160 so as not to cover the insulating film 160.
Similarly, also in Example 1, an organic functional layer may be provided between the insulating films 160 so as not to cover the insulating film 160.

  Furthermore, in addition to the case where the hole injection layer 121 is in direct contact with the first electrode 110, another layer may be provided between the hole injection layer 121 and the first electrode 110.

DESCRIPTION OF SYMBOLS 10 Light emitting element 20 Light emitting element 30 Light emitting element 100 Translucent substrate 110 1st electrode 110 Translucent substrate 120 Organic functional layer 121 Hole injection layer 122 Hole transport layer 123 Light emitting layer 124 Electron transport layer 125 Electron injection layer 130 1st Two electrodes 140 Conductor pattern 140A Conductor pattern 141 First conductor part 142 Second conductor part 150 Auxiliary electrode 160 Insulating film 161 Insulating film 171 Wiring 172 Wiring 173 Lead line L Light emitting part

Claims (6)

A light emitting part having a first electrode, a second electrode, an organic functional layer sandwiched between the first electrode and the second electrode and including a light emitting layer,
A conductor pattern provided in parallel in the light emitting portion,
The second electrode covers the first electrode and the conductor pattern,
The light emitting element, wherein the conductive pattern is spaced apart from the first electrode and is electrically connected to the second electrode. The light emitting device according to claim 1,
The said conductor pattern is a light emitting element provided with the 1st conductor part comprised with the same material as said 1st electrode. The light emitting device according to claim 2,
On the first electrode, an auxiliary electrode having a lower electrical resistance than the first electrode is provided,
The said conductor pattern is a light emitting element provided with the said 1st conductor part and the 2nd conductor part which was provided so that it overlapped with the said 1st conductor part, and was comprised with the same material as the said auxiliary electrode. In the light emitting element as described in any one of Claims 1-3,
A light emitting device in which the conductor pattern is covered with an insulating film. In the light emitting element as described in any one of Claims 1-4,
A light emitting device in which the conductor pattern is divided. A first electrode;
A plurality of auxiliary electrodes provided on the first electrode and having a lower electrical resistance than the first electrode;
A second electrode;
An organic functional layer including a light emitting layer provided between the first electrode and the second electrode;
A light emitting device in which some of the plurality of auxiliary electrodes are divided.

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