WO2015105022A1

WO2015105022A1 - Organic electroluminescent device

Info

Publication number: WO2015105022A1
Application number: PCT/JP2014/084494
Authority: WO
Inventors: 秀謙尾関
Original assignee: コニカミノルタ株式会社
Priority date: 2014-01-07
Filing date: 2014-12-26
Publication date: 2015-07-16
Also published as: JPWO2015105022A1

Abstract

This organic electroluminescent device is configured by being provided with an organic electroluminescent element having a light emitting surface as one surface, and a drive power supply that is provided on the other surface of the organic electroluminescent element, said drive power supply including a flexible quantum cell.

Description

Organic electroluminescence device

The present invention relates to an organic electroluminescence device including an organic electroluminescence element and a driving power source.

In an image display device (display) using an organic electroluminescence (EL) element or the like as a light emitting element, flexibility and cable-less use for mobile applications are required.
As image display devices and the like become flexible and cable-less, a drive power supply that is a power supply needs to be flexible.

Currently, lithium ion batteries, which are the mainstream of secondary batteries, have problems in both high capacity and flexibility. On the other hand, a quantum battery that can be repeatedly charged and discharged has been proposed as a battery that solves these problems (see, for example, Patent Document 1).

International Publication No. 2013/065093

However, an organic electroluminescence device having flexibility by combining an organic electroluminescence element and a secondary battery has not been realized.
In order to solve the above-described problem, in the present invention, an organic electroluminescence device having flexibility is realized.

An organic electroluminescent device of the present invention includes an organic electroluminescent element having a light emitting surface on one surface and a driving power source provided on the other surface of the organic electroluminescent element, and the driving power source is a quantum device having flexibility. Includes batteries.

According to the present invention, an organic electroluminescent device having flexibility can be provided.

It is a figure which shows schematic structure of the organic EL device of 1st Embodiment. It is a figure which shows schematic structure (cross-section structure) of a quantum battery. It is a figure which shows the structure of the charge layer of a quantum battery. It is a band figure for demonstrating the new energy level formed by the photoexcitation structure change. It is a band figure for demonstrating the new energy level formed by the photoexcitation structure change. It is a band figure explaining the charging / discharging function of a quantum battery. It is a band figure explaining the charging / discharging function of a quantum battery. It is a figure which shows the structure of a bipolar type quantum battery. It is a figure which shows schematic structure of the organic EL device of 2nd Embodiment.

Hereinafter, although the example of the form for implementing this invention is demonstrated, this invention is not limited to the following examples.
The description will be given in the following order.
1. Embodiment of organic electroluminescence device (first embodiment)
2. Embodiment of organic electroluminescence device (second embodiment)

<1. Embodiment of Organic Electroluminescence Device (First Embodiment)>
Hereinafter, specific embodiments of the organic electroluminescence (organic EL) device of the present invention will be described.
[Configuration of organic EL device]
In FIG. 1, the schematic block diagram of the organic EL device of this embodiment is shown.
In the organic EL device 10 shown in FIG. 1, the drive power supply 11 is sealed with a sealing material 12, the organic EL element 13 is sealed with a sealing material 14, and the sealing material 12 and the sealing material 14 are bonded to each other. 15 is adhered and configured. The organic EL element 13 and the drive power supply 11 have an arrangement in which the organic EL element 13 and the drive power supply 11 are stacked close to each other via the adhesive layer 15 and the

sealing materials

12 and 14. The organic EL device 10 emits light from the surface (upper surface) opposite to the side close to the drive power supply 11 of the organic EL element 13.
The organic EL device 10 may include other configurations necessary for realizing the organic EL device, such as a drive circuit (not shown) for driving and controlling the organic EL element 13.

The drive power supply 11 can be composed of a thin, sheet-like (planar) quantum battery having flexibility. The details of the drive power supply 11 applicable to the organic EL device 10 and the quantum battery constituting the drive power supply 11 will be described later.
The organic EL element 13 can be constituted by a light emitting element composed of a conventionally proposed organic electroluminescent element (organic EL element, OLED) having sheet-like (planar) flexibility.
As the sealing material 12 and the sealing material 14, a conventionally known sealing material having flexibility can be used. Moreover, the sealing

materials

12 and 14 themselves may contain a material having gas barrier properties, and a film having gas barrier properties may be formed inside the

sealing materials

12 and 14.
Although not shown, the drive power supply 11 and the organic EL element 13 are electrically connected.

The standard of flexibility is that the bending radius R is 100 mm or less, preferably the bending radius R is 30 mm to 3 mm.
The organic EL device 10 preferably has a thickness of 3 mm or less.
In the quantum battery having flexibility, the thickness is preferably 2.5 mm or less, more preferably 0.5 mm or less in consideration of the mounting limit to the card standard.

Further, for example, a booster circuit that boosts the electromotive force of the drive power supply 11 and supplies it to the organic EL element 13 can be provided outside the organic EL device 10 as necessary.
If the booster circuit can be composed of a flexible substrate and a thin film circuit, it can be provided inside the organic EL device 10.

In the organic EL device 10 of the present embodiment, the

sealing materials

12 and 14 for sealing the drive power supply 11 and the organic EL element 13 are bonded, and the drive power supply 11 and the organic EL element 13 are electrically connected. Therefore, the organic EL element 13 can be driven by the drive power supply 11 to emit light.
Moreover, since the drive power supply 11 and the organic EL element 13 are both sheet-like and flexible, the organic EL device 10 having flexibility can be realized. Further, it is possible to emit light even when the organic EL device 10 is bent.

[Organic EL device]
The organic EL element 13 applied to the organic EL device 10 has been proposed to have a flexible structure using a transparent flexible film as a substrate. By using this organic electroluminescent element having flexibility, the organic EL device 10 having flexibility can be realized.

A specific example of a preferable layer configuration of the organic EL element 13 applied to the organic EL device 10 is shown below.
(I) Base film / anode / hole injection layer / hole transport layer / light emitting layer / electron transport layer / cathode (ii) Base film / anode / hole injection layer / hole transport layer / light emitting layer / electron Transport layer / electron injection layer / cathode (iii) substrate film / anode / hole injection layer / hole transport layer / light emitting layer / electron transport layer / hole blocking layer / cathode (iv) substrate film / anode / positive Hole injection layer / hole transport layer / light emitting layer / electron transport layer / electron injection layer / hole blocking layer / cathode (v) substrate film / anode / hole injection layer / hole transport layer / electron blocking layer / light emission Layer / electron transport layer / electron injection layer / hole blocking layer / cathode For the base film, a resin film having flexibility is used.
A conventionally well-known material can be used for the material of each layer of each layer structure.
A protective film is preferably formed on the cathode of each layer structure.
Moreover, it is preferable to form a gas barrier film | membrane on the inner surface side of a base film or a protective film.

When the organic EL device 10 is applied to a lighting device that uses the organic EL element 13 as a light emitting element, it is possible to dispose a flexible quantum battery on one side of the light emitting element. When manufacturing the illumination device having this configuration, for example, the organic EL element 13 and the quantum battery are bonded and bonded, or the light emitting element and the quantum battery are stacked and integrated.

[Drive power supply]
Next, the configuration of the drive power supply 11 applied to the organic EL device 10 described above will be described.
The drive power supply 11 is disposed on the non-light emitting surface of the organic EL element 13. The drive power supply 11 can be composed of a single quantum battery or a plurality of quantum batteries.
For example, in order to obtain an output voltage necessary for light emission of the organic EL element 13, a configuration in which a plurality of quantum cells are connected in series may be employed.
In general, an output voltage of at least 2.5 V or more is required for driving an organic EL element. For this reason, when a single quantum cell does not have this output voltage, a plurality of quantum cells can be connected in series to generate an output voltage required for the drive power supply 11.

When a plurality of quantum cells are connected, the quantum cells are arranged in a single layer in a plane parallel to the light emitting surface of the organic EL device 10, or the plurality of quantum cells are perpendicular to the light emitting surface of the organic EL device 10. Laminate in any direction. And the circuit which draws out from the drive power supply 11 by connecting the electrode of each arrange | positioned quantum battery in series is formed.
Thus, for example, even when a quantum battery having an output voltage of about 1.2 to 1.5 V alone is used, 2.5 V or more necessary for light emission of the organic EL element 13 is output from the drive power supply 11. Can do. Furthermore, an output voltage of 6 V or more can be obtained by increasing the number of quantum cells connected in series.

In the driving power source 11, the stacked capacity of the quantum batteries can be increased in capacity with a smaller main area than in the case of a single layer. For this reason, it is preferable to have a configuration in which a plurality of quantum cells are stacked. Even when a plurality of quantum cells are stacked, it is possible to satisfy the flexibility required for the organic EL device 10 by using a quantum cell having a configuration described later.

In addition, generally used lithium ion secondary batteries have high heat generation, and when a plurality of layers are stacked, particularly when three or more layers are stacked, the heat dissipation of the batteries stacked in the center is a problem. Become. For this reason, it is difficult to realize a laminated structure using a lithium ion secondary battery.
In the quantum battery described later, the heat generation is low, and even when three or more layers are stacked, a problem due to heat generation hardly occurs. For this reason, it becomes possible to stack | stack the quantum battery of the quantity required in order to satisfy | fill the characteristics of the drive power supply 11, such as a capacity | capacitance required by the organic EL device 10, and an output voltage.

[Quantum battery]
Next, the configuration of the quantum battery applied to the drive power supply 11 will be described.
FIG. 2 shows a schematic configuration (cross-sectional structure) of the quantum battery 20. The quantum battery 20 is a secondary battery based on a charging principle in which a photoexcitation structure change technique is adopted for the charging layer 22 and can be repeatedly charged and discharged.

A quantum battery 20 shown in FIG. 2 includes a conductive first electrode 21 using a metal material having passive characteristics, a charge layer 22 for charging energy, a p-type metal oxide semiconductor layer 23, and a first electrode 21. The conductive second electrode 24 using a metal material having passive characteristics is laminated.

(electrode)
The first electrode 21 and the second electrode 24 may be functionally provided with a conductive film, and may be made of a highly conductive metal such as copper, copper alloy, nickel, aluminum, silver, gold, zinc, or tin. It is possible to use. Among these, copper is inexpensive and suitable as an electrode material. The first electrode 21 and the second electrode 24 are provided with a metal layer having a passive characteristic in order to prevent deterioration due to oxidation of the electrode caused by a thermal process at the time of manufacturing a battery or aging.

Passivity is a state of a metal that corrodes at an extremely slow rate despite the fact that the metal electrochemical column is in a base (active) position, and is the basis of the corrosion resistance of the metal material. Metals that are highly polarized by a small anodic current are passivated by approaching the behavior of electrochemically fairly noble (inactive) metals. In this case, the oxide film as the corrosion product comes to have a protective property and is given corrosion resistance.

The corrosion region can be examined by an anodic polarization curve in which a potential is applied to the electrode in the positive direction so that an oxidation reaction occurs. When the potential is low, the current increases with the potential, and when exceeding a certain potential, the current rapidly decreases and continues in a certain potential range, and then rises again. The potential region where the initial current rises is called the active state region, the potential region where the current is kept at a low value is called the passive region, and the potential region where the current increases again is called the overpassive region. In this passive region, a passive oxide film with a thickness of several nanometers, which is rich in protection, is produced.

In the passive zone, the current is reduced, i.e. the conductivity is disturbed, but usually the electrode is protected to prevent contact with the atmosphere, and the oxidation of the electrode occurs locally It is. Therefore, the oxidation is locally suppressed, the electrode is prevented from being deteriorated, and a quantum battery that can be used for a long time even after repeated charge and discharge is possible.
Specific examples of the metal material having passive characteristics include chromium, nickel, titanium, and molybdenum, or an alloy containing at least one kind of chromium, nickel, titanium, and molybdenum.

(Charging layer)
Next, the configuration of the charging layer 22 of the above-described quantum battery 20 will be described. FIG. 3 shows the configuration of the charge layer 22 of the quantum battery.
The charging layer 22 shown in FIG. 3 has a configuration filled with an n-type metal oxide semiconductor 25 covered with an insulating coating 26. The charge layer 22 has a function of storing energy when the n-type metal oxide semiconductor 25 is irradiated with ultraviolet rays to cause a photoexcitation structure change.

Examples of the material of the n-type metal oxide semiconductor 25 used for the charging layer 22 include titanium dioxide, stannic oxide, and zinc oxide. These metal oxides can be produced by decomposing metal aliphatic acid salts. For the production of metal oxides, metal aliphatic acid salts that are converted to metal oxides by combustion in an oxidizing atmosphere are used.

In addition to silicone, mineral oil, magnesium oxide (MgO), silicon dioxide (SiO ₂ ) may be used for the insulating coating 26 as an inorganic insulator, and thermoplastic resins such as polyethylene and polypropylene are used as the insulating resin. Further, a thermosetting resin such as a phenol resin or an amino resin may be used.

(Energy level)
In the charging layer 22, the n-type metal oxide semiconductor 25 irradiated with ultraviolet rays forms a new energy level due to the change of the photoexcitation structure. The photoexcited structure change is a phenomenon in which the interstitial distance of a substance excited by light irradiation changes, and this photoexcited structure change occurs in the n-type metal oxide semiconductor 25 which is an amorphous metal oxide. Use materials with properties.
Hereinafter, the formation state of the new energy level of the charge layer 22 due to the change in the photoexcitation structure will be described using a band diagram in an example in which the n-type metal oxide semiconductor 25 is titanium dioxide and the material of the insulating film is silicone.

4 and FIG. 5, in a configuration in which a silicone 34 as an insulating coating 26 exists between a copper metal 30 as the first electrode 21 and a titanium dioxide 32 as the n-type metal oxide semiconductor 25. It is a band figure explaining the state in which the new energy level 44 was formed by the photoexcitation structure change. In this band diagram, a new energy level 44 is formed in the band gap of the n-type metal oxide semiconductor 25 due to the photoexcited structure change phenomenon of the titanium dioxide 32. The conduction band 36 has a barrier due to an insulating layer made of silicone 34.

FIG. 4 shows a state in which an ultraviolet ray 38 is irradiated on a structure having an insulating layer made of silicone 34 between titanium dioxide 32 and copper 30. When the ultraviolet rays 38 are irradiated to the titanium dioxide 32 coated with an insulating film, the electrons 42 in the valence band 40 of the titanium dioxide 32 are excited to the conduction band 36. In the vicinity of the interface with the copper 30, the electrons 42 pass through the insulating layer of the silicone 34 with a certain probability and temporarily move to the copper 30.

The photoexcited structural change of the titanium dioxide 32 occurs in the absence of the electrons 42, and the interatomic distance of the site from which the electrons 42 of the valence band 40 are removed changes. At this time, the energy level 44 has moved to the band gap in the Fermi level 46. As a result, an energy level 44 is formed in the band gap in the Fermi level 46.
Formation of the energy level 44 due to the photoexcitation structure change of the titanium dioxide 32 occurs continuously while the ultraviolet ray 38 is irradiated.

FIG. 5 shows a state in which the above-described phenomenon occurs repeatedly while the ultraviolet ray 38 is irradiated, and a large number of energy levels 44 are formed in the band gap. However, the electrons 42 to be trapped in these energy levels 44 are excited by the ultraviolet rays 38 and moved to the copper 30. The energy level 44 in the band gap in the absence of electrons thus generated remains even after the ultraviolet irradiation is finished.

The role of the silicone 34 as an insulating layer is to create a barrier between the copper 30 and the titanium dioxide 32 and allow the excited electrons 42 to pass through the tunnel effect to form an energy level 44 in the band gap in the absence of electrons. It is. The electrons 42 that have moved to the copper 30 remain on the copper 30 due to the charging potential around the silicone 34.

In the quantum battery 20, the p-type metal oxide semiconductor layer 23 is further stacked on the charging layer 22 to form a blocking layer, and the second electrode 24 is provided thereon. The principle of the secondary battery having such a structure will be described with reference to band diagrams shown in FIGS.

In the following description, the charging layer 22 made of silicone 34 and titanium dioxide 32 and the p-type made of nickel oxide 50 sandwiched between the first electrode 21 made of copper 30 and the second electrode 24 made of copper 48. The quantum battery 20 having a configuration including the metal oxide semiconductor layer 23 will be described as an example.

FIG. 6 is a band diagram when a negative voltage is applied to the copper 48 constituting the second electrode 24 and the copper 30 constituting the first electrode 21 is grounded to 0V.
When a bias electric field (−) is applied to the titanium dioxide 32 having the energy level 44 in the band gap, the electrons 42 of the copper 30 pass through the barrier due to the silicone 34 (tunneling) and move to the titanium dioxide 32. The moved electrons 42 are captured by the energy level 44 existing between the band gaps of the titanium dioxide 32 because the nickel oxide 50 blocks further movement to the copper 48. That is, energy is stored in the charging layer 22 made of titanium dioxide 32, and the charging layer 22 is charged with electrons 42. Since this state is maintained even after the application of the bias electric field is canceled, the quantum battery having this configuration has a function as a secondary battery.

FIG. 7 is a band diagram when a load (not shown) is connected to the copper 30 and the copper 48 and discharged. The electrons 42 trapped in the band gap of the titanium dioxide 32 become free electrons in the conduction band 36. The free electrons move to the copper 30 and flow to the load. This phenomenon is an energy output state and a discharge state. Finally, there is no electron 42 at the energy level 44 in the band gap, and all the energy in the charge layer 22 is used.

As described above, by applying a voltage from the outside, the energy level formed in the band gap of titanium dioxide can be filled with electrons. Then, by connecting a load to the electrode, electrons can be emitted to extract energy. Therefore, it can function as a battery. Moreover, it can be used as a secondary battery by repeating this phenomenon. This is the basic principle of the quantum battery constituting the drive power supply 11 of the organic EL device 10.

Although the principle of the quantum battery as a basic secondary battery has been described above, in principle, the electrons 42 move and stay in the first electrode 21 due to the tunneling effect through the insulating coating 26, and thus the charging layer 22. And the first electrode 21 are extremely important. For this reason, it is important to prevent deterioration in adhesion due to oxidation of the electrode caused by a thermal process and aging during the manufacture of the battery. For this reason, deterioration due to electrode oxidation has a great influence on the quantum battery. For this reason, it is possible to prevent the electrode from being oxidized and to realize a long-life quantum cell by forming the electrode with a metal having passive characteristics and limiting the deterioration of the electrode to partial surface oxidation. .

The second electrode 24 is a laminate through the p-type metal oxide semiconductor layer 23, and the problem from the viewpoint of adhesion in the first electrode 21 is small. Is also an important issue. For this reason, it is an effective means for extending the lifetime of the quantum battery that the second electrode 24 is also made of a metal material having passive characteristics.

The quantum battery having the above-described configuration can obtain only an output voltage of about 1.2 to 1.5 V in a single-layer cell. However, by connecting at least two or more quantum battery cells in series, an organic EL element can be obtained. An output voltage of 2.5 V or more necessary for light emission can be obtained.

[Quantum battery (bipolar type)]
Next, the configuration of a quantum battery having an output voltage necessary for emitting light from the organic EL element 13 in a single cell will be described.
By forming a bipolar quantum battery as shown in FIG. 8, an output voltage necessary for light emission of the organic EL element 13 can be ensured in addition to a method of connecting a plurality of quantum battery cells in series.

A bipolar quantum cell 60 shown in FIG. 8 includes a first electrode 61, a first charge layer 62, a first p-type metal oxide semiconductor layer 63, a second electrode 64, a second charge layer 65, and a second p-type metal oxide semiconductor. The layer 66 and the third electrode 67 are stacked in this order.

In the bipolar quantum battery 60, the first electrode 61, the second electrode 64, and the third electrode 67 have the same configuration as the first electrode 21 and the second electrode 24 in the quantum battery 20 shown in FIG. Can do. Similarly, the 1st charge layer 62 and the 2nd charge layer 65 can be set as the structure similar to the charge layer 22 in the quantum battery 20 shown in the above-mentioned FIG. The first p-type metal oxide semiconductor layer 63 and the second p-type metal oxide semiconductor layer 66 can have the same configuration as the p-type metal oxide semiconductor layer 23 in the quantum battery 20 shown in FIG. .

The bipolar quantum battery 60 has a configuration in which two quantum batteries 20 shown in FIG. 2 are stacked while sharing one electrode. That is, the second electrode 64 of the bipolar quantum cell 60 shown in FIG. 8 is sandwiched between the first p-type metal oxide semiconductor layer 63 and the second charge layer 65, so that one is a negative electrode surface and the other is a positive electrode surface. It becomes a functioning bipolar electrode.

The bipolar quantum battery 60 having the configuration shown in FIG. 8 has the same function as when two cells of the quantum battery 20 shown in FIG. 2 are connected in series. For this reason, the cell of the single-layer quantum battery 20 having an output voltage of about 1.2 to 1.5 V is used as the bipolar quantum battery 60, so that the organic EL element 13 emits light with one quantum battery cell. Therefore, it is possible to secure an output voltage necessary for this.

Further, for example, in the bipolar quantum battery 60 shown in FIG. 8, the third electrode 67 is also formed as a bipolar electrode by further stacking a charge layer, a p-type metal oxide semiconductor layer, and an electrode on the third electrode 67. And a higher output quantum battery cell can be configured. As described above, in the bipolar quantum battery 60, for example, a quantum battery cell having a configuration in which three or more charging layers are stacked may be formed according to a required output.
By making the quantum battery used for the drive power supply 11 have a bipolar structure, not only can a higher output be obtained with a single cell, but also the size and height of the quantum battery cell can be reduced due to omission of electrodes and omission of packaging materials. Densification is possible.

(Power supply method)
As a power supply method to the drive power supply 11 applied to the organic EL device 10, wireless power supply of a capacitive coupling type, an electromagnetic induction type, an electric field / magnetic field resonance type, a radio wave reception type, or the like can be used. In the organic EL device 10, when wireless power feeding is performed to the drive power source 11, a power feeding configuration connected to the above-described quantum battery may be provided.

[effect]
By providing a driving power source using a thin and highly flexible planar quantum battery on the non-light emitting surface side of the organic EL element, an organic EL device with high flexibility can be configured. Furthermore, by adopting a configuration in which the cells of the quantum battery used for the driving power source are connected in series or a bipolar structure, the output voltage from the driving power source can be increased to such an extent that the organic EL element can emit light. Therefore, a highly flexible organic EL device can be realized.

In general, a flexible lithium ion secondary battery has an exothermic temperature of 45 ° C. or higher. The exothermic temperature of this lithium ion secondary battery is higher than an appropriate temperature range in which the organic EL element emits light. For this reason, in order to achieve thinning in the organic EL device, when the organic EL element and the lithium ion secondary battery are stacked close to each other, the reduction in the luminous efficiency of the organic EL element, the adverse effect on the life, Performance degradation such as display quality degradation occurs. Therefore, when a lithium ion secondary battery is used for the organic EL device, a design such as increasing the distance between the organic EL element and the drive power supply is required, which causes a reduction in thickness and flexibility.

On the other hand, in the above-described quantum battery, the heat generation temperature is about 20 ° C. For this reason, in an organic EL device provided with this quantum battery as a drive power supply, there is no performance degradation or adverse effect on the design that occurs when a lithium ion secondary battery is used.
Furthermore, the heat generation temperature of the quantum battery of about 20 ° C. is a suitable temperature range in which the organic EL element has good light emission efficiency. For this reason, by arranging the organic EL element so as to be in contact with the quantum battery, the temperature of the organic EL element is led to a suitable temperature range where the luminous efficiency is good, and the temperature of the organic EL element is set within a temperature range where the luminous efficiency is good. It can be stabilized.
Therefore, by disposing the organic EL element so as to be stacked close to the quantum battery, the light emission efficiency of the organic EL element can be improved, and the performance of the organic EL device can be improved.

<2. Embodiment of Organic Electroluminescence Device (Second Embodiment)>
FIG. 9 shows a schematic configuration diagram (cross-sectional view) of an organic electroluminescence (organic EL) device according to the second embodiment of the present invention.
An organic EL device 70 shown in FIG. 9 has a configuration in which an organic EL element 72 is stacked on a drive power supply 71 and the whole is sealed with a sealing material 73.
The organic EL device 70 has an arrangement in which the organic EL element 72 and the drive power supply 71 are stacked close to each other by directly stacking the organic EL element 72 on the drive power supply 71. The organic EL device 70 has a configuration in which a drive power supply 71 is stacked on the non-light emitting surface side of the organic EL element 72 and emits light from a surface (upper surface) opposite to the side adjacent to the drive power supply 71 of the organic EL element 72. It has become.
The organic EL device 70 may include other configurations necessary for realizing this device, such as a drive circuit (not shown) for driving and controlling the organic EL element 72.

The drive power supply 71 can apply the same configuration as that of the organic EL device 10 described in the first embodiment. In addition, for the quantum battery constituting the drive power supply 71, the various quantum battery configurations described in the first embodiment can be used as appropriate.

The organic EL element 72 can be constituted by a light-emitting element composed of an organic electroluminescence element (OLED) having a sheet-like flexibility that has been conventionally proposed.
As the sealing material 73, a conventionally known sealing material having flexibility can be used. Further, the sealing material 73 itself may contain a material having gas barrier properties, and a film having gas barrier properties may be formed inside the sealing material 73.
Although not shown, the drive power supply 71 and the organic EL element 72 are electrically connected.

In the organic EL device 70 of the present embodiment, the organic EL element 72 and the drive power supply 71 are laminated, and the drive power supply 71 and the organic EL element 72 are electrically connected. The element 72 can be driven to emit light.
Moreover, since the drive power supply 71 and the organic EL element 72 are both sheet-like and have flexibility, the organic EL device 70 having flexibility can be realized. Further, it is possible to emit light even when the organic EL device 70 is bent.

[effect]
The organic EL device of the second embodiment has the same effect as that of the first embodiment. Further, the organic EL element and the driving power source are stacked, so that the thickness can be further reduced.
In addition, by directly stacking the organic EL element and the driving power source, heat from the quantum battery constituting the driving power source is more easily transmitted to the organic EL element. For this reason, the effect which makes the luminous efficiency of the organic EL element favorable by the heat_generation | fever of a quantum battery can be acquired more.

The present invention is not limited to the configuration described in the above embodiment, and various modifications and changes can be made without departing from the configuration of the present invention.

DESCRIPTION OF

SYMBOLS

10,70 ...

Organic EL device

11, 71 ... Drive

power supply

12, 14, 73 ... Sealing

material

13, 72 ... Organic EL element, 15 ... Adhesive layer, 20. ..Quantum battery, 21, 61 ... first electrode, 22 ... charge layer, 23 ... p-type metal oxide semiconductor layer, 24,64 ... second electrode, 25 ... n-type Metal oxide semiconductor, 26 ... insulating coating, 30, 48 ... copper, 32 ... titanium dioxide, 34 ... silicone, 36 ... conduction band, 38 ... ultraviolet light, 40 .. Valence band, 42 ... electron, 44 ... energy level, 46 ... Fermi level, 50 ... nickel oxide, 60 ... bipolar quantum cell, 62 ... first charge layer 63 ... first p-type metal oxide semiconductor layer, 65 ... second charge layer, 66 ... second p-type gold The oxide semiconductor layer, 67 ... third electrode

Claims

An organic electroluminescence device having a light emitting surface on one surface;
A driving power source provided on the other surface of the organic electroluminescence element,
The organic electroluminescent device in which the driving power source includes a quantum battery having flexibility.
The organic electroluminescent device according to claim 1, wherein the driving power source has an output voltage of 2.5V or more.
The organic electroluminescent device according to claim 2, wherein the quantum battery has a bipolar electrode.
The organic electroluminescent device according to claim 2, wherein the cells of the quantum battery are connected in series.
The organic electroluminescent device according to claim 2, wherein the driving power source has an output voltage of 6V or more.
The organic electroluminescence device according to claim 1, wherein the organic electroluminescence element and the driving power source are laminated close to each other.
The organic electroluminescent device according to claim 2, wherein the total thickness is 3 mm or less.
The organic electroluminescence device according to claim 2, wherein the bending radius R is 100 mm or less.