JP2000164364A - Organic electroluminescent element and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability preventing the intrusion of water molecule into an element and lowering the heat generation of the element by providing predetermined-shaped magnetic substance members as an inductor arranged to that organic film is positioned inside and outside each other. SOLUTION: Magnetic substance materials are arranged in a hole carrier layer 5 on a hole injection layer 3. A lower electrode 1 is arranged under the magnetic substance materials 4a, 4c, 4e, but the lower electrode 1 is not arranged under the magnetic substance materials 4b, 4d, and a glass board 2 is provided through the hole injection layer 3. Connecting materials 6a, 6b electrically connected to the lower electrode 1 are provided over the magnetic substance materials 4b, 4d. The magnetic substance material and the lower electrode 1 are positioned opposite to each other in the vertical direction so as to functions as an inductor. Since a secondary coil for receiving the power supply and a rectifying circuit and included in the element, intrusion of the impure material such as water molecule and oxygen is prevented, and the deteriorating speed of the element is lowered so as to improve the characteristic and the lifetime of the element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescence device and a method for manufacturing the same, and more particularly, to an organic electroluminescence device capable of supplying electric power in a non-contact manner and a method for manufacturing the same.

[0002]

2. Description of the Related Art Organic electroluminescent devices are
It has a structure in which an organic thin film having strong fluorescence is sandwiched between a pair of electrodes (anode and cathode). When a DC voltage (electric field) is applied between the pair of electrodes, positive charges (hereinafter referred to as holes) are injected from the anode and electrons are injected into the organic thin film from the cathode, and the applied electric field causes holes and electrons to flow through the organic thin film. Moves. Then, the holes and electrons recombine with a certain probability, and the emitted energy excites organic molecules having strong fluorescence, and emits fluorescence when the excited molecules return to the ground state of energy. The rate at which light is extracted to the outside via the excited state is called the quantum yield of light emission, which indicates the conversion efficiency from electric energy to light.

The organic electroluminescent device has characteristics that it exhibits higher luminous efficiency at a lower voltage than other light emitting devices, has high visibility, and has a wide variety of luminescent colors, and is used as a display portion of a flat panel display. Expected.

Conventionally, power is supplied to an organic electroluminescence element by an external power supply circuit electrically connected to an anode and a cathode. FIG. 16 is a schematic configuration diagram of a circuit for supplying a DC voltage from the AC power supply 103 to the organic electroluminescence element 101 via the rectifier circuit 102. Generally, as shown in FIG. 16, it is necessary to electrically extract the organic electroluminescence element 101 to the outside.

[0005]

In general, it has been known that the organic electroluminescent element is deteriorated in element characteristics when it is affected by water molecules, oxygen or the like, and the operating life is shortened. Therefore, it is essential to perform sealing in order to prevent intrusion of water molecules, oxygen, and the like. However, in the related art, since it is necessary to electrically connect the pair of electrodes and the power supply circuit, the organic electroluminescent element cannot be completely covered by sealing. That is, there is a problem that invasion of water molecules, oxygen and the like into the organic electroluminescence element from the external power supply circuit side via the pair of electrodes is unavoidable, and there is a problem that the element is deteriorated. In addition, the organic electroluminescent element has a problem that the organic material is crystallized due to heat generation of the element due to light emission, and the element is deteriorated.

The present invention has been made in view of the above circumstances, and prevents the intrusion of water molecules and the like into an organic electroluminescence element, reduces the heat generation of the element, and improves the durability of the element. It is an object to provide an organic electroluminescence element that can be improved.

[0007]

According to the present invention, a first conductive film as a lower electrode, a plurality of organic films capable of emitting electroluminescence, and a second conductive film as an upper electrode are provided on a transparent substrate. And one of the first and second conductive films has an uneven repetition shape as a cross-sectional structure, and a plurality of organic films, a first film portion located outside the repetition shape, And a second film portion located inside the repetitive shape, wherein the organic film is inside each of the first film portion and the second film portion and alternately located inside and outside the repetitive shape. An organic electroluminescence element is provided, which is provided with a magnetic member having a predetermined shape arranged as described above and thereby functions as an inductor.

[0008]

Further, in the organic electroluminescence device of the present invention having such a structure, in particular, the first conductive film has a cross-sectional structure having a repeating pattern of irregularities, and Is formed on a first conductive film, the second film portion of the organic film is formed on a transparent substrate, and alternately formed inside and outside the repeating shape of the first conductive film. A magnetic member of a predetermined shape arranged to be located,
The first conductive film functions as an inductor.

Further, the second conductive film has a cross-sectional structure of a concave and convex repetitive shape, a first film portion of the organic film is formed on the second conductive film, and a second film of the organic film is formed. A magnetic member having a predetermined shape formed on the first conductive film and arranged so as to be alternately located inside and outside the repetitive shape of the second conductive film; and the second conductive film as an inductor. It is characterized by functioning.

Here, the organic film includes a hole injection layer, a hole transport layer, and a light emitting layer. Furthermore, the present invention is characterized in that a rectifier circuit comprising a resistor and a dielectric disposed in parallel between the first conductive film and the second conductive film is formed on the transparent substrate. It is an organic electroluminescence element.

Further, in the present invention, the rectifier circuit is disposed near an end of the transparent substrate, and the surface area a of the portion of the organic film contributing to light emission is 0% with respect to the surface area S of the whole organic electroluminescence element. It is an organic electroluminescent device, wherein 0.5S ≦ a <S.

In the present invention, the transparent substrate serves as a support substrate for the organic electroluminescence element, but is preferably made of a material having a light-transmitting property, and glass, quartz, transparent plastic or the like is used. The first electrode film serving as the lower electrode is preferably made of a conductive material having a light-transmitting property.
An ITD film or the like can be used. The second, which is the upper electrode
The conductive film may be any material having conductivity, and for example, an AlLi alloy can be used. As a connection material for connecting the first conductive film and a connection material for connecting the second conductive film, a conductive material (such as an AlLi alloy) may be used. The magnetic member may be a first conductive film or a second conductive film.
It is necessary to use a material that can function as a so-called inductor when combined with a conductive film. For example, FeCoSiB may be used.

According to the present invention, a first conductive film is divided and deposited in a predetermined pattern on a transparent substrate, and a hole injection layer is deposited on the above structure while leaving only a part of the first conductive film. Performing a step of depositing a magnetic member on the hole injection layer in a predetermined pattern shape, and forming a hole transport layer on the structure, covering the magnetic member, and depositing the hole injection layer. Depositing only a portion of the first conductive film without leaving, and depositing a connection material on the structure so as to connect the portions of the first conductive film on which the hole injection layer is not deposited to each other; An object of the present invention is to provide a method for manufacturing an organic electroluminescent device, comprising: a step of depositing a light emitting layer on the structure in a predetermined pattern shape; and a step of depositing a second conductive film on the structure.

A step of depositing a first conductive film on the transparent substrate, a step of depositing a hole injection layer on the structure, and a step of forming a connection material for connecting the second conductive film on the structure. Depositing a hole transport layer on the above-mentioned structure in a predetermined pattern so as to leave a part of the connection material; and depositing a magnetic member on the hole transport layer. Depositing a light-emitting layer on the magnetic material on the structure, and depositing the hole transport layer while leaving only a part of the connection material where the hole transport layer is not deposited; A step of depositing a conductive film on the structure and dividing the conductive film so as to be connected to a part of the connecting material, thereby providing a method for manufacturing an organic electroluminescent element.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto. Hereinafter, the first
Is also referred to as a lower electrode, and the second conductive film is also referred to as an upper electrode. FIG. 1 is a schematic configuration diagram of a circuit for supplying power to an organic electroluminescence element in a non-contact manner in the present invention. In FIG. 1, the power induction circuit includes an AC power supply 103, an oscillator 104, and a high-frequency power driver 105.
, And a primary coil 106, and the electromagnetic induction circuit includes a secondary coil 107 and a rectifier circuit 102. Electric power is transferred between the primary coil 106 and the secondary coil 107 in a non-contact manner. The present invention is characterized in that the organic electroluminescence element 101 has a configuration including an electromagnetic induction circuit including a secondary coil 107 and a rectifier circuit 102. Further, as described later, the secondary coil is formed by a special arrangement of the magnetic material and the upper and lower electrodes.

FIG. 2 shows an equivalent circuit diagram of the organic electroluminescence device of the present invention. Here, the organic electroluminescence element is a secondary coil 10 shown in FIG.
7 and a rectifier circuit 102. In FIG. 2, the rectifier circuit 102 includes a diode 108, a resistor 109, and a capacitor 110. Electromagnetic induction occurs between the primary coil 106 and the secondary coil 107 included in the organic electroluminescent element, and power is transferred from the power induction circuit of FIG. 1 to the organic electroluminescent element in a non-contact manner.

That is, the electric power supplied by the AC power supply 103 is converted into a high frequency by the oscillator 104, and transferred to the primary coil 106 by the high frequency power driver 105. The organic electroluminescence element receiving power receives the electromagnetic induction generated on the primary coil side in a non-contact manner, and the magnetic material acting as the secondary coil 107 and the lower electrode or the upper electrode change the magnetic field, respectively. And electric power is taken out as a change in the electric field. This electric power is converted to direct current in a rectifier circuit 102 formed of a resistor and a derivative formed in the organic electroluminescence element. This DC power is supplied to the light emitting portion of the organic electroluminescence element, and the element is continuously lit.

Next, the structure of the organic electroluminescence device of the present invention will be described. FIG. 3 is a schematic sectional view of a main part of an embodiment of the organic electroluminescence device of the present invention. Here, a case is shown in which the vertical positional relationship between the lower electrode and the magnetic material is alternately reversed, and a secondary coil is formed by the lower electrode and the magnetic material.

In FIG. 3, an organic luminescence element comprises a glass substrate 2 as a support substrate, an organic thin film layer (3, 5, 7) composed of three layers, a lower electrode 1, three layers, an upper electrode 10, and a magnetic material 4 (4a). 4e) and a resistor and a dielectric (not shown). As shown in FIG. 3, the lower electrode 1 (1a, 1b, 1c) is
(6a, 6b) are electrically connected.

For the lower electrode 1, a transparent electrode material, for example, indium tin oxide (ITO) is used.
An AlLi alloy (hereinafter referred to as AlLi) is used for the connection material 6 and the connection material 6. The organic thin film layer is composed of three layers, a hole injection layer 3, a hole transport layer 5, and a light emitting layer 7, and is formed by performing predetermined patterning. Copper phthalocyanine (CuPb) is used as a material of the hole injection layer 3. As a material of the hole transport layer 5, N, N-bis (3-methylphenyl)-(1,1-biphenyl)-
4,4 diamine (hereinafter referred to as TPD) is used. As a material of the light emitting layer 7, a quinolinol aluminum complex (hereinafter, referred to as Alq ₃ ) is used. However, these materials are only examples, and the present invention is not limited to these materials. For example, alloys described in JP-A-63-295695 and organic compounds described in JP-A-3-152897 can be used. Further, the support substrate is preferably a transparent substrate, and besides glass, transparent plastic, quartz, or the like can be used.

The magnetic material 4 is disposed in the hole transport layer 5 on the hole injection layer 3 as shown in FIG. Here, of the magnetic materials 4 among the magnetic materials 4, 4 c and 4 e, the lower electrode 1 is disposed below the magnetic materials. On the other hand, there is no lower electrode 1 below the magnetic material closed and roughened by reference numerals 4b and 4d, and the glass substrate 2 exists via the hole injection layer 3, and conversely, the lower electrode 1 is provided above the magnetic materials 4b and 4d. 1, a connection material 6a electrically connected to
6b is present.

That is, in the cross section shown in FIG. 3, the vertical positional relationship between the magnetic material 4 and the lower electrode 1 is alternately reversed. The structure having such a positional relationship is equivalent to a structure in which the lower electrode 1 is wound around a magnetic material in a coil shape, and serves as an inductance (that is, the secondary coil 107). As the magnetic material 4, an amorphous magnetic material FeCoSiB is used.
a to 4e are arranged in parallel with each other and formed in a structure extending in a direction perpendicular to the paper surface.

Although a rectifier circuit is not shown in FIG. 3, a rectifier circuit composed of a resistor and a derivative is formed at an end of a glass substrate which does not directly contribute to display, as described later. Thus, the organic electroluminescence device of the present invention is constituted. Ta can be used as the material of the resistor, and ZnS can be used as the material of the derivative. Each member constituting the organic electroluminescence element shown in FIG. 3 is patterned into a predetermined shape using a metal mask, and is formed by vacuum evaporation by heating a required material to a predetermined temperature. Vacuum evaporation may be performed using a generally used resistance heating vacuum evaporation apparatus.

Next, the manufacturing process of the organic electroluminescence device of the present invention will be described. FIG. 5 shows a flowchart of the manufacturing process of the organic electroluminescence device of the present invention. Hereinafter, steps 1 to 9 of this flowchart will be described. Step 1: Formation of Lower Electrode 1 (FIG. 6) As shown in FIG. 6, a 5 × 5 mm square glass substrate (made of Matsunami glass) with indium tin oxide (hereinafter abbreviated as ITO) is formed by a well-known photolithographic technique. An ITO pattern is formed. Here, each ITO pattern is formed to have a width of about 160 μm and a length of about 180 μm in the left-right direction on the paper surface and a pitch of 200 μm.

Here, the lower electrode 1 is formed by being divided into a large number of patterns. The patterns arranged in the horizontal direction on the paper are electrically connected by a connecting material 6 in a step 5 described later, and a step 8 is performed. In the lower electrode pattern 11
And 12, the lower electrode patterns 15 and 16, and the lower electrode patterns 13 and 14 are electrically connected.
Are formed such that all the patterns are electrically one line having the same potential.

Next, in steps 2 to 9, the members constituting the organic luminescence element of the present invention are formed by a vacuum evaporation method. In the resistance heating vacuum evaporation apparatus, the substrate prepared in step 1 is set on a substrate holder. Also, a material (CuPc, T) for forming three organic thin film layers on a sublimation material Mo board (manufactured by Nippon Bax Metal).
PD, Alq ₃ ), and a magnetic material 4 (FeCoSiB) on a Mo flat board (manufactured by Nippon Bax Metal).
Lower electrode connecting material 6 (AlLi), resistor 8 material (Ta), derivative 9 material (ZnS) and upper electrode 10
After placing the material (AlLi), vacuum evacuation is started.
Vacuum deposition is performed in a vacuum state of about 10 ⁻⁶ Torr.

Step 2: Deposition of Hole Injection Layer 3 (FIG. 7) The substrate surface formed in FIG. 6 is covered with a metal mask to form a structure pattern as shown in FIG. The injection layer material 3 (CuPc) is heated and deposited at a deposition rate of 0.1 to 0.2 nm / sec to a thickness of about 50 nm. Here, the hole injection layer material 3 is formed so as to open the edge portion of the lower ITO pattern by a width of about 10 μm in order to form the connection material 6 of the lower electrode in a later step. With this deposition, the hole injection layer 3 becomes
It is formed on the lower electrode 1 (3a, 3c, 3e) and on the glass substrate 2 (3b, 3d).

Step 3: Deposition of Magnetic Material 4 (FIG. 8) Here, the surface of the structure formed in step 2 of FIG. 7 is covered with a predetermined metal mask, and the magnetic material 4 (FeCoSi
B) is heated and the deposition rate is 0.1 to 0.2 nm / sec.
Is deposited to a thickness of about 100 nm. In FIG. 8, the magnetic material 4 is formed on the hole injection layer 3 in a rod shape extending in the same direction, that is, perpendicular to the horizontal direction of the paper, and has a width of 20 μm in the horizontal direction of the paper and a pitch of 100 μm in the horizontal direction.
m, length 4 mm. Here, the magnetic material 4a, 4
The lower electrode 1 exists below c and 4e, but does not exist below the magnetic materials 4b and 4d.

Step 4: Deposition of Hole Transport Layer 5 (FIG. 9) The surface of the structure formed in Step 3 of FIG. 8 is covered with a predetermined metal mask, the hole transport material TPD is heated, and the deposition rate is 0.1. Vapor deposition is performed at a thickness of about 50 nm at about 0.2 nm / sec. The hole transport layer material 5 is also formed by opening the edge portion of the ITO pattern by a width of about 10 μm.
In FIG. 9, the hole transport layer 5 is formed on the hole injection layer 3, and the magnetic material 4 located on the hole injection layer 3 is embedded in the hole transport layer 5.

Step 5: Deposition of connection material 6 for lower electrode (FIG. 10) The surface of the structure formed in step 4 of FIG. 9 is covered with a predetermined metal mask, and connection material 6 (AlLi) for the lower electrode is heated. Then, a film thickness of about 50 nm is deposited at a deposition rate of 1 nm / sec. The connection material 6 has a width of 60 μ in the horizontal direction on the paper.
m, a pitch of 100 μm, and is formed so as to cover an opening portion (a portion having a width of 10 μm) of the ITO pattern.

In FIG. 10, the connection material 6a is formed so as to connect the lower electrodes 1a and 1b in a bridge shape, and the connection material 6b is formed so as to connect the lower electrodes 1b and 1c in a bridge shape. Thereby, the lower electrodes 1a, 1b, 1c
Are connected so as to be electrically at the same potential via the connection materials 6a and 6b. Further, as shown in FIG. 10, at the same time as the deposition of the connection material 6 for the lower electrode,
The derivative electrode 21 is formed. The same material AlLi as the lower electrode connection material 6 may be used for the derivative electrode 21.

Step 6: Vapor Deposition of Light Emitting Layer 7 (FIG. 11) The surface of the structure prepared in Step 4 of FIG. 10 is covered with a predetermined metal mask, and the light emitting layer material 7 (Al
q ₃₎ was heated and evaporation rate 0.1 to 0.2 nm / se
In step c, a film is deposited to a thickness of about 50 nm. In FIG. 11, the light emitting layer 7 is patterned on the hole transport layer 5 and the connection material 6 in a direction perpendicular to the extending direction of the magnetic material 4 (the left-right direction on the paper).

Step 7: Deposition of Resistor 8 (FIG. 12) The surface of the structure formed in Step 6 of FIG. 11 is covered with a predetermined metal mask, and Ta to be the resistor 8 is heated. A film is deposited at a thickness of about 10 nm at a rate of 1 to 0.2 nm / sec. In FIG. 12, the resistor 8 is a glass substrate 2
Is deposited at a width of about 5 μm and a length of about 4 mm in the left-right direction on the paper in parallel with the dielectric electrode 21.

Step 8: Deposition of Dielectric 9 (FIG. 12) After the resistor 8 is formed in Step 9, ZnS to be the dielectric 9 is heated using a predetermined metal mask for forming a dielectric, and the deposition rate is increased. 1 μm at 1-10 nm / sec
Deposit to the extent. In FIG. 12, a dielectric material 9 has a width 1 in the left-right direction of the drawing on the dielectric electrode 21 created in step 5.
It is deposited with a thickness of about 25 μm and a length of about 4 mm. In addition, dielectric 9
The insulating cover 22 is formed at a position as shown in FIG. 12 in order to prevent unnecessary conduction with other parts at the same time as the vapor deposition of. Here, the insulating cover 22 is made of the same material Zn as the derivative 9.
S is used.

Step 9: Deposition of the upper electrode 10 (FIG. 13) The surface of the structure formed in Step 8 of FIG. 12 is covered with a metal mask for forming the upper electrode 10, and AlLi to be the upper electrode is heated, and the deposition rate is increased. 150 nm film thickness at 1 nm / sec
about m. In FIG. 13, the upper electrode 10 is deposited on the entire upper part of the light emitting organic thin film layer except for the region where the resistor 8 and the dielectric 9 exist.

In FIG. 13, the upper electrode 10
Simultaneously with the formation of the electrode 2 using the electrode material AlLi.
3, 24, 25 and 26 are deposited. Here, the electrode 23
Is a dielectric electrode formed on the dielectric 9. The electrodes 24 and 25 connect a resistor and a dielectric in parallel with the lower electrode 17 and the upper electrode 10. Electrode 26
Is for electrically connecting the lower electrodes 11 and 12 and, although not shown, similarly forms electrodes for connecting the lower electrodes 13 and 14 and the lower electrodes 15 and 16. In each of the above steps 2 to 9, the film thickness and the deposition rate are monitored by a quartz oscillation type film thickness meter.

FIG. 13 is a perspective view of an organic electroluminescence device completed by the above-described manufacturing process. When electric power is supplied to a secondary coil composed of the magnetic material 4 and the lower electrode 1 by electromagnetic induction using an external electrode induction circuit as a source, the electric field changes between the upper electrode 10 and the lower electrode 1. This change is converted into a DC voltage by the rectifier circuit including the resistor 8 and the dielectric 9, and the light emission phenomenon is continuously caused in the organic thin film.

FIG. 14 is a sectional view of the device taken along line AA 'in FIG. 13, and FIG. 15 is a sectional view of the device taken along line BB' in FIG. In FIGS. 14 and 15, horizontal arrows shown at the bottom of the figures indicate light emission ranges. The light emission range is an area where light emitted in the organic thin film layers (3, 5, 7) passes through the glass substrate 2 and is emitted below the substrate.

14 and 15, the glass substrate 2, the lower electrode 1, the hole injection layer 3, the hole transport layer 5, the light emitting layer 7, and the upper electrode 10 are stacked in this order from the bottom, as viewed in the vertical direction. The portion becomes the light emission range. The light emitting range in which these layers are stacked plays the role of the diode 108 shown in FIG. That is, the light emission range forms a part (diode portion) of the rectifier circuit 102.

However, when the element is viewed in the vertical direction, the other parts are the magnetic material 4 or the connection material 6 of the lower electrode.
Light is not emitted outside. That is,
Glass substrate 2, lower electrode 1, hole injection layer 3, magnetic material 4, hole transport layer 5, light emitting layer 7, region in which upper electrode 10 is laminated in this order, glass substrate 2, lower electrode 1, hole injection layer 3, Magnetic material 4, hole transport layer 5, connecting material 6,
The region in which the light emitting layer 7 and the upper electrode 10 are laminated in this order, the region in which the glass substrate 2, the lower electrode 1, the hole injection layer 3, the hole transport layer 5, the connection material 6, the light emitting layer 7, and the upper electrode 10 are laminated in this order are , A non-light emitting area.

In this embodiment, the surface area a of the portion contributing to light emission can be set to 50% or more (0.5S ≦ a <S) with respect to the surface area S of the entire organic electroluminescence element. Also, in the design of the structure of the organic electroluminescence element of the present invention, if the arrangement and size of the magnetic material are set so that the area of the non-light emitting area is sufficiently smaller than the light emitting area, the element becomes visually It appears to be emitting light.

As described above, 5 × 5 mm as shown in FIG.
An organic electroluminescent device was formed on a corner substrate. When the voltage induced between the upper and lower electrodes by electromagnetic induction was 10 V, green light emission with a luminance of 500 cd / m ² could be obtained.

FIGS. 3 and 6 to 13 show an organic electroluminescent element of a type in which a secondary coil is formed by the lower electrode 1 and the magnetic material 4, but the present invention is not limited to this. The secondary coil may be formed by the body material 4.

FIG. 4 is a schematic sectional view of a main part of another embodiment of the organic electroluminescence device of the present invention. Here, a case is shown in which the vertical positional relationship between the upper electrode 10 and the magnetic material 4 is alternately reversed to form a secondary coil. Although the rectifier circuit including the resistor 8 and the dielectric 9 is omitted in FIG. 4, a rectifier circuit is provided at an end on the glass substrate 2 as shown in FIG.

In FIG. 4, the magnetic materials 4f to 4j
Is formed above the hole transport layer 5 and in the light emitting layer 7. The upper electrode 10 (10a, 10b, 10
c) is formed on the light emitting layer 7 but is formed on the hole injection layer 3 in the connection material 19 (19a, 19b).
Electrically connected by Connection materials 19a, 19b
May be made of the same material as the upper electrode 10 (for example, AlLi).

In this structure, the magnetic material 4f, 4h, 4
j is located below the upper electrode 10, but the magnetic material 4g,
4i is above the upper electrode 10. That is, the positional relationship between the magnetic material 4 and the upper electrode 10 in the vertical direction is alternately reversed, but this can serve as a secondary coil. 4 is different from the manufacturing process of FIG. 5 in that the lower electrode 1 is formed, the hole injection layer 3 is deposited,
Deposition of connection material 19 for upper electrode, deposition of hole transport layer 5, deposition of magnetic material 4, deposition of luminescent layer 7, upper electrode 1
0 may be performed in the order of vapor deposition.

The organic electroluminescence device of the present invention which emits light by electromagnetic induction is not required to connect a peripheral circuit such as a power supply circuit to the device. In addition, the present invention can be used for a display unit of a portable information terminal, an information card, and the like, and in particular, can be used for a display device that does not include a primary battery that is consumed due to a chemical change.

[0048]

According to the present invention, since the organic electroluminescence element includes the secondary coil receiving power supply and the rectifier circuit, it is not necessary to provide a power supply circuit for light emission outside the element. Since the organic electroluminescence device can be manufactured by an integrated vacuum process, the intrusion of impurities such as water molecules and oxygen into the device can be prevented, the deterioration rate of the device can be reduced, the device characteristics can be improved, and the device characteristics can be improved. Long life can be realized.

Further, since the magnetic material contained in the organic electroluminescence device of the present invention functions as a heat sink, heat generation of the device can be suppressed and the durability of the device can be improved. Furthermore, the organic electroluminescence device of the present invention includes a rectifier circuit, and a direct current is supplied to a light emitting portion of the device, so that continuous light emission is possible.

Further, by changing the materials and shapes of the magnetic material, electrodes, resistors, and dielectrics integrally formed in the element, the light emission luminance is changed, and the frequency of the external magnetic field capable of emitting light is selected. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a circuit for supplying power to an organic electroluminescence element in a non-contact manner.

FIG. 2 is an equivalent circuit diagram of the organic electroluminescence element of the present invention.

FIG. 3 is a schematic cross-sectional view of a main part of an organic electroluminescence element according to an embodiment of the present invention.

FIG. 4 is a schematic sectional view of a main part of an organic electroluminescence element according to another embodiment of the present invention.

FIG. 5 is a flowchart of a manufacturing process of the organic electroluminescence device according to one embodiment of the present invention.

FIG. 6 is a perspective view of a step 1 of manufacturing an electroluminescence element according to an embodiment of the present invention.

FIG. 7 is a perspective view illustrating a step 2 of manufacturing the electroluminescent element according to the embodiment of the present invention.

FIG. 8 is a perspective view of a step 3 of manufacturing the electroluminescent element according to the embodiment of the present invention.

FIG. 9 is a perspective view illustrating a step 4 of manufacturing the electroluminescent element according to the embodiment of the present invention.

FIG. 10 is a perspective view illustrating a step 5 of manufacturing the electroluminescent element according to the embodiment of the present invention.

FIG. 11 is a perspective view illustrating a step 6 of manufacturing the electroluminescent element according to the embodiment of the present invention.

FIG. 12 is a perspective view of an electroluminescent element according to an embodiment of the present invention, in manufacturing steps 7 and 8.

FIG. 13 is a perspective view illustrating a step 9 of manufacturing the electroluminescent element according to the embodiment of the present invention.

FIG. 14 is a sectional view taken along line AA ′ of FIG. 13 according to the present invention;
FIG. 2 is a cross-sectional view of the organic electroluminescence element cut in FIG.

FIG. 15 is a cross-sectional view taken along line BB ′ of FIG. 13 according to the present invention;
FIG. 2 is a cross-sectional view of the organic electroluminescence element cut in FIG.

FIG. 16 is a schematic configuration diagram of a conventional circuit for supplying power to an organic electroluminescence element.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lower electrode 2 Glass substrate 3 Hole injection layer 4 Magnetic material 5 Hole transport layer 6 Connection material of lower electrode 7 Light emitting layer 8 Resistor 9 Dielectric 10 Upper electrode 11, 12, 13, 14, 15, 16, 17 Lower part Electrode 19 Connection material for upper electrode 21 Dielectric electrode 22 Insulating cover 23 Dielectric electrode 24 Electrode connecting lower electrode 17, dielectric electrode 21 and resistor 8 25 Upper electrode 10, dielectric electrode 23 and resistor 8 26 for connecting the lower electrodes 11 and 12

Claims (8)

[Claims] 1. A first or second conductive film comprising a first conductive film as a lower electrode, a plurality of organic films capable of emitting electroluminescence, and a second conductive film as an upper electrode on a transparent substrate. Either one of the films has a repeating structure of irregularities as a cross-sectional structure, and a plurality of organic films,
A first film portion located outside the repeating shape, and a second film portion located inside the repeating shape,
The organic film includes a magnetic member of a predetermined shape arranged inside each of the first film portion and the second film portion and alternately positioned inside and outside the repeating shape,
An organic electroluminescence device characterized by that it functions as an inductor. 2. The method according to claim 1, wherein the first conductive film has a repetitive uneven shape as a cross-sectional structure, a first film portion of the organic film is formed on the first conductive film, and a second film portion of the organic film is formed. A film member is formed on a transparent substrate, and a magnetic member having a predetermined shape arranged alternately inside and outside the repetitive shape of the first conductive film, and the first conductive film as an inductor. The organic electroluminescent device according to claim 1, which functions. 3. A method according to claim 1, wherein the second conductive film has a repetitive uneven shape as a cross-sectional structure, and a first film portion of the organic film is formed of a second film.
A predetermined film formed on the conductive film, wherein the second film portion of the organic film is formed on the first conductive film, and arranged alternately inside and outside the repetitive shape of the second conductive film; The organic electroluminescence device according to claim 1, wherein the magnetic member having the shape and the second conductive film function as an inductor. 4. The organic electroluminescence device according to claim 1, wherein the organic film comprises a hole injection layer, a hole transport layer, and a light emitting layer. 5. A rectifier circuit comprising a resistor and a dielectric disposed in parallel between a first conductive layer and a second conductive layer on the transparent substrate. 4. The organic electroluminescence device according to 3 or 4. 6. A surface area a of a portion of the organic film that contributes to light emission, wherein the rectifier circuit is disposed near an end of a transparent substrate.
Is the surface area S of the entire organic electroluminescence element.
6. The organic electroluminescent device according to claim 5, wherein 0.5S ≦ a <S. 7. A step of depositing a first conductive film in a predetermined pattern shape on a transparent substrate, and a step of depositing a hole injection layer on the structure except for a part of the first conductive film. Depositing a magnetic member in a predetermined pattern on the hole injection layer; and forming a hole transport layer on the structure, covering the magnetic member, and forming a first conductive layer on which the hole injection layer is not deposited. Depositing only a part of the film, depositing a connection material on the structure to connect parts of the first conductive film where the hole injection layer is not deposited, and The method for manufacturing an organic electroluminescent device according to claim 4, comprising a step of depositing a predetermined pattern on the structure and a step of depositing a second conductive film on the structure. 8. A step of depositing a first conductive film on a transparent substrate, and a step of depositing a hole injection layer on the structure.
Depositing a connection material for connecting the second conductive film in a predetermined pattern on the structure; and forming a hole transport layer on the structure in a predetermined pattern so as to leave a part of the connection material. A step of depositing a magnetic material on the hole transport layer in a predetermined pattern shape, a step of depositing the light emitting layer on the magnetic material on the structure, and the hole transport layer being deposited. 5. The method according to claim 4, further comprising the steps of: evaporating the second conductive film while leaving only a part of the connection material that does not exist; A method for manufacturing an organic electroluminescence element.