CN109585524B - Lighting device and manufacturing method thereof - Google Patents
Lighting device and manufacturing method thereof Download PDFInfo
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- CN109585524B CN109585524B CN201910009024.6A CN201910009024A CN109585524B CN 109585524 B CN109585524 B CN 109585524B CN 201910009024 A CN201910009024 A CN 201910009024A CN 109585524 B CN109585524 B CN 109585524B
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- organic electroluminescent
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- electroluminescent device
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/155—Surface emitters, e.g. organic light emitting diodes [OLED]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
- F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
- F21S41/645—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices by electro-optic means, e.g. liquid crystal or electrochromic devices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
- G02F1/157—Structural association of cells with optical devices, e.g. reflectors or illuminating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
- F21Y2115/15—Organic light-emitting diodes [OLED]
Abstract
The invention relates to the technical field of illumination, in particular to an illumination device and a manufacturing method thereof. So as to prolong the service life of the organic electroluminescent device when the organic electroluminescent device is used as a light source. The embodiment of the invention provides a lighting device, which comprises a substrate and an organic electroluminescent device arranged on the substrate; further comprising: the electrochromic device is arranged on one side of the light emitting surface of the organic electroluminescent device, and the contact surfaces of the electrochromic device and the organic electroluminescent device are mutually insulated; the electrochromic device comprises an electrochromic layer, and the electrochromic layer covers the light emitting surface of the organic electroluminescent device; the light transmittance of the electrochromic device when the electrochromic device is electrified is smaller than that of the electrochromic device when the electrochromic device is not electrified.
Description
Technical Field
The present disclosure relates to lighting technologies, and particularly to a lighting device and a manufacturing method thereof.
Background
An OLED (Organic Light-Emitting Diode) has the advantage of self-luminescence and is applied in the field of illumination, such as the current OLED car Light, and the like, and the OLED device is used as a Light source to realize the illumination of an automobile system.
Disclosure of Invention
The present invention provides a lighting device and a method for manufacturing the same, which is used to prolong the service life of an organic electroluminescent device used as a light source.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, embodiments of the present invention provide a lighting device, including a substrate, and an organic electroluminescent device disposed on the substrate; further comprising: the electrochromic device is arranged on one side of the light emitting surface of the organic electroluminescent device, and the contact surfaces of the electrochromic device and the organic electroluminescent device are mutually insulated; the electrochromic device comprises an electrochromic layer, and the electrochromic layer covers the light emitting surface of the organic electroluminescent device; the light transmittance of the electrochromic device when the electrochromic device is electrified is smaller than that of the electrochromic device when the electrochromic device is not electrified.
Optionally, the electrochromic device is black in color when energized.
Optionally, the electrochromic device further includes a first transparent electrode and a second transparent electrode stacked on both sides of the electrochromic layer.
Optionally, the material of the electrochromic layer comprises iridium oxide.
Optionally, the organic electroluminescent device includes an anode, a light emitting layer, and a cathode sequentially disposed on the substrate, and a light emitting direction of the organic electroluminescent device is from the anode to the cathode; the electrochromic device is arranged on one side of the organic electroluminescent device far away from the substrate.
Optionally, the light emitting layer includes a blue light emitting layer, a red light emitting layer and a green light emitting layer which are stacked; and a charge transport material layer disposed between each adjacent two of the layers.
Optionally, the organic electroluminescent device further comprises a hole injection layer disposed between the light-emitting layer and the anode, and an electron injection layer disposed between the light-emitting layer and the cathode.
Optionally, the hole injection layer further comprises a hole transport material, and the electron injection layer further comprises an electron transport material; alternatively, the first and second electrodes may be,
the organic electroluminescent device further includes a hole transport layer disposed between the hole injection layer and the anode, and an electron transport layer disposed between the electron injection layer and the cathode.
Optionally, the lighting device is a vehicle lamp.
In another aspect, an embodiment of the present invention provides a method for manufacturing a lighting device, including: forming an organic electroluminescent device on a substrate; fixing an electrochromic device on one side of a light-emitting surface of the organic electroluminescent device, wherein the contact surfaces of the electrochromic device and the organic electroluminescent device are mutually insulated; the electroluminescent device comprises an electroluminescent layer, and the electroluminescent layer covers the light emitting surface of the organic electroluminescent device; the light transmittance of the electrochromic device when the electrochromic device is electrified is smaller than that of the electrochromic device when the electrochromic device is not electrified.
The embodiment of the invention provides a lighting device and a manufacturing method thereof, which combines an organic electroluminescent device and an electrochromic device together, utilizes the characteristic that the color of the electrochromic device changes when the electrochromic device is electrified so as to lead the light transmittance to change, because the electrochromic device is arranged on one side of the light-emitting surface of the organic electroluminescent device and the electrochromic layer covers the light-emitting surface of the organic electroluminescent device, and the light transmittance of the electrochromic device when the electrochromic device is electrified is less than that of the electrochromic device when the electrochromic device is not electrified, so that in the daytime, the organic electroluminescent device is turned off, and the light transmittance of the external light is reduced by electrifying the electrochromic device, therefore, the damage to the organic electroluminescent device caused by the irradiation of the external light to the organic electroluminescent device is avoided, and the service life of the organic electroluminescent device is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an illumination device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another lighting device provided in the embodiment of the present invention;
fig. 3 is a schematic diagram of the operation of an organic electroluminescent device and an electrochromic device in a lighting device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electrochromic device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an organic electroluminescent device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another organic electroluminescent device provided in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
When the OLED device is used as a light source for illumination of an automobile system, since the automobile is often exposed to sunlight, the material and structure of the OLED device itself are easily damaged when being irradiated by sunlight, thereby reducing the service life of the OLED device.
The embodiment of the invention provides a lighting device, which is shown in fig. 1 and fig. 2, and comprises a substrate 1, an organic electroluminescent device 2 arranged on the substrate 1, and an electrochromic device 3 arranged on one side of a light-emitting surface of the organic electroluminescent device 2, wherein the contact surfaces of the electrochromic device 3 and the organic electroluminescent device 2 are mutually insulated; the electrochromic device 3 comprises an electrochromic layer 31, the electrochromic layer 31 covers the light-emitting surface of the organic electroluminescent device 2, and the light transmittance of the electrochromic device 3 when the electrochromic device is powered on is smaller than that of the electrochromic device 3 when the electrochromic device is not powered on.
Electrochromism refers to a phenomenon in which optical properties (reflectivity, transmittance, absorption, and the like) of a material undergo a stable and reversible color change under the action of an applied electric field, and is visually represented as a reversible change in color and transparency.
The embodiment of the invention provides a lighting device, by combining an organic electroluminescent device 2 and an electrochromic device 3 together, and utilizing the characteristic that the color of the electrochromic device 3 changes when the electrochromic device 3 is electrified, so that the light transmittance changes, because the electrochromic device 3 is arranged on one side of the light emitting surface of the organic electroluminescent device 2, an electrochromic layer 31 covers the light emitting surface of the organic electroluminescent device 2, and the light transmittance of the electrochromic device 3 when the electrochromic device is electrified is smaller than the light transmittance of the electrochromic device 3 when the electrochromic device is not electrified, as shown in fig. 3, in the daytime, the organic electroluminescent device 2 is closed, and at the moment, the light transmittance of external light is reduced by electrifying the electrochromic device 3, so that the organic electroluminescent device 2 is prevented from being irradiated by the external light to damage the organic electroluminescent device 2, the service life of the organic electroluminescent device 2 is prolonged.
At night, with reference to fig. 3, when the organic electroluminescent device 2 needs to be turned on, the electrochromic device 3 is not powered on, and light emitted by the organic electroluminescent device 2 can be transmitted to the external environment through the electrochromic device 3, so that illumination is realized.
Here, the light transmittance of the electrochromic device 3 when energized is not particularly limited.
In one embodiment of the present invention, as shown in fig. 3, the electrochromic device 3 is black when energized. At this time, the electrochromic device 3 can absorb the external light, and the damage to the material and the structure of the organic electroluminescent device 2 caused by the external light irradiating on the organic electroluminescent device 2 is avoided.
In still another embodiment of the present invention, as shown in fig. 2, the electrochromic device 3 further includes a first transparent electrode 32 and a second transparent electrode 33 which are stacked and disposed on both sides of the electrochromic layer 31.
The material of the first transparent electrode 32 and the second transparent electrode 33 may include ITO (indium tin oxide) material.
Alternatively, as shown in fig. 4, the electrochromic device 3 may further include an ion storage layer 34 and an electrolyte layer 35 disposed between one of the first and second transparent electrodes 32 and 33 and the electrochromic layer 31.
In the five-layer electrochromic device 3, the first transparent electrode 32 and the second transparent electrode 33 are connected to the positive electrode or the high-low voltage, respectively, and when the first transparent electrode 32 is connected to the positive electrode or the low voltage, as shown in fig. 4, the ion storage layer 34 and the electrolyte layer 35 are sequentially stacked and disposed between the first transparent electrode 32 and the electrochromic layer 31, and when the second transparent electrode 33 is connected to the positive electrode or the low voltage, the ion storage layer 34 and the electrolyte layer 35 are sequentially stacked and disposed between the second transparent electrode 33 and the electrochromic layer 31.
Among them, the ion storage layer 34 functions to supply and store ions, which are supplied to the electrolyte layer 35 when the electrochromic layer 31 is implanted with ions, and collect ions when the ions of the electrochromic layer 31 are extracted by applying a reverse electric field. Which has a chemical reaction opposite to that of the electrochromic layer 31 (e.g., oxidation reaction of the electrochromic layer 31 occurs, the ion storage layer 34 undergoes a reduction reaction, while reduction reaction of the electrochromic layer 31 occurs, and oxidation reaction of the ion storage layer 34 occurs) to balance charges.
The electrolyte layer 35, also called ion-conducting layer, mainly provides the electrical transformationIons required for the colour effect (mainly H)+、Li+、Na+) The transmission channel of (2) can meet the neutral requirement and realize the current continuity. Polymer electrolytes can be roughly classified into all-solid polymer electrolytes, gel polymer electrolytes, and composite polymer electrolytes 3, depending on the structure and composition of the electrolyte system.
In operation, the electrochromic layer 31 undergoes an electrochemical redox reaction by injecting or extracting charges (ions or electrons) to cause the electrochromic layer to undergo color change.
The material of the electrochromic layer 31 may be classified into an inorganic electrochromic material and an organic electrochromic material. Inorganic electrochromic materials are mostly transition metal oxides or derivatives thereof, e.g. WO3、MoO3、V2O5、Nb2O5、BiO3、NiO、IrO2、CoO3、Rh2O3MnO, etc. Typical representatives of the organic electrochromic materials are viologen compounds, which are all called 1,1 '-disubstituted-4, 4' -bipyridine.
In an alternative embodiment of the present invention, the material of the electrochromic layer 31 comprises iridium oxide (IrO)2). Iridium oxide is an anodically coloring material, is colorless and transparent when not energized, and turns black when energized.
The specific structure of the organic electroluminescent device 2 is not limited, and the organic electroluminescent device 2 may be a single-sided light emitting device or a double-sided light emitting device.
Since the electrochromic device 3 is disposed on the light emitting surface side of the organic electroluminescent device 2, when the organic electroluminescent device 2 is a double-sided light emitting device, there may be two electrochromic devices 3 respectively disposed on the two light emitting surface sides of the organic electroluminescent device 2.
In an embodiment of the present invention, referring to fig. 5, the organic electroluminescent device 2 includes an anode 21, a light-emitting layer 22 and a cathode 23 sequentially disposed on the substrate 1, wherein the light-emitting direction of the organic electroluminescent device 2 is directed from the anode 21 to the cathode 23; the electrochromic device 3 is arranged on the side of the organic electroluminescent device 2 remote from the substrate 1. The organic electroluminescent device 2 is a top emission device.
Here, the emission color of the organic electroluminescent device 2 is not particularly limited.
In an embodiment of the present invention, with continued reference to fig. 5, the light-emitting layer 22 includes a blue light-emitting layer 221, a red light-emitting layer 222, and a green light-emitting layer 223 stacked together; and a charge transport material layer 224 disposed between each adjacent two of the blue, red, and green light emitting layers 221, 222, and 223.
The material of the charge transport material layer includes an electron transport material and a hole transport material.
In the embodiment of the present invention, the organic electroluminescent device 2 is a white light device, and by disposing the charge transport material layer 224 between each adjacent two layers, the transport of carriers (such as electrons and holes) between the layers is facilitated.
Specifically, under the action of an external electric field, when carriers (electrons and holes) are injected, the charge transport material layer can realize the directional migration of the carriers to realize a charge transport process, so that the blue light emitting layer 221, the red light emitting layer 222 and the green light emitting layer 223 are subjected to electron and hole recombination to respectively emit blue light, red light and green light.
Optionally, with continued reference to fig. 5, the organic electroluminescent device 2 further comprises a hole injection layer 24 disposed between the light-emitting layer 22 and the anode 21, and an electron injection layer 25 disposed between the light-emitting layer 22 and the cathode 23.
Further optionally, the material of the hole injection layer 24 further includes a hole transport material, and the material of the electron injection layer 25 further includes an electron transport material; alternatively, referring to fig. 6, the organic electroluminescent device 2 further includes a hole transport layer 26 disposed between the hole injection layer 24 and the anode 21, and an electron transport layer 27 disposed between the electron injection layer 25 and the cathode 23. Is beneficial to improving the electron and hole transmission performance of the organic electroluminescent device 2.
In yet another embodiment of the present invention, the lighting device is a vehicle lamp. Therefore, under the sunlight in the daytime, the organic electroluminescent device 2 in the vehicle lamp is turned off, and the light transmittance of the outside light can be reduced by electrifying the electrochromic device 3, so that the damage to the structure and the material of the organic electroluminescent device 2 is avoided, and at night, when the organic electroluminescent device 2 in the vehicle lamp is turned on, the organic electroluminescent device 3 is not electrified, a certain light transmittance is maintained, so that the illumination is realized.
In another aspect, an embodiment of the present invention provides a method for manufacturing a lighting device, including: forming an organic electroluminescent device on a substrate; fixing an electrochromic device on one side of the light-emitting surface of the organic electroluminescent device, wherein the contact surface of the electrochromic device and the contact surface of the organic electroluminescent device are mutually insulated, the electrochromic device comprises an electrochromic layer, and the electrochromic layer covers the light-emitting surface of the organic electroluminescent device; the light transmittance of the electrochromic device when the electrochromic device is electrified is smaller than that of the electrochromic device when the electrochromic device is not electrified.
The embodiment of the invention provides a manufacturing method of a lighting device, wherein an electrochromic device is fixed on one side of a light-emitting surface of an organic electroluminescent device, an electrochromic layer of the electrochromic device covers the light-emitting surface of the organic electroluminescent device, and the light transmittance of the electrochromic device when the electrochromic device is powered on is smaller than that of the electrochromic device when the electrochromic device is not powered on, so that the organic electroluminescent device is turned off in the daytime, the light transmittance of external light is reduced by powering on the electrochromic device, the organic electroluminescent device is prevented from being damaged by the external light irradiating the organic electroluminescent device, and the service life of the organic electroluminescent device is prolonged.
At night, when the organic electroluminescent device needs to be started, the electrochromic device is not electrified, and light emitted by the organic electroluminescent device can be transmitted to the external environment through the electrochromic device, so that illumination is realized.
Wherein, the organic electroluminescent device can be formed on the substrate by evaporation.
Specifically, the light emitting layer of the organic electroluminescent device comprises a blue light emitting layer, a red light emitting layer and a green light emitting layer which are arranged in a stacked manner; and a charge transport material layer disposed between each adjacent two of the blue light emitting layer, the red light emitting layer, and the green light emitting layer, an organic electroluminescent device emitting white light can be formed by evaporating each material layer.
The electrochromic device can be fixed on one side of the light-emitting surface of the organic electroluminescent device in a pasting mode.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A lighting device includes a substrate, and an organic electroluminescent device disposed on the substrate; it is characterized by also comprising: the electrochromic device is arranged on one side of the light emergent surface of the organic electroluminescent device, and the contact surfaces of the electrochromic device and the organic electroluminescent device are mutually insulated;
the electrochromic device comprises an electrochromic layer, and the electrochromic layer covers the light emitting surface of the organic electroluminescent device;
the light transmittance of the electrochromic device when the electrochromic device is electrified is smaller than that of the electrochromic device when the electrochromic device is not electrified;
the electrochromic device further includes: a first transparent electrode and a second transparent electrode which are arranged on two sides of the electrochromic layer in a laminated manner; and an ion storage layer and an electrolyte layer disposed between the electrochromic layer and one of the first and second transparent electrodes;
wherein, when the first transparent electrode is connected with a positive electrode or a low voltage, the ion storage layer and the electrolyte layer are sequentially stacked and arranged between the first transparent electrode and the electrochromic layer; when the second transparent electrode is connected with a positive electrode or is low in voltage, the ion storage layer and the electrolyte layer are sequentially stacked and arranged between the second transparent electrode and the electrochromic layer.
2. A lighting device as recited in claim 1, wherein said electrochromic device is black in color when energized.
3. The lighting device of claim 1, wherein the material of the electrochromic layer comprises iridium oxide.
4. The illumination device according to claim 1, wherein the organic electroluminescent device comprises an anode, a light-emitting layer and a cathode sequentially arranged on the substrate, and the light-emitting direction of the organic electroluminescent device is directed from the anode to the cathode;
the electrochromic device is arranged on one side of the organic electroluminescent device far away from the substrate.
5. The illumination device according to claim 4, wherein the light-emitting layer comprises a blue light-emitting layer, a red light-emitting layer, and a green light-emitting layer which are arranged in a stacked manner; and a charge transport material layer disposed between each adjacent two of the blue light emitting layer, the red light emitting layer, and the green light emitting layer.
6. The illumination device according to claim 4 or 5, wherein the organic electroluminescent element further comprises a hole injection layer provided between the light-emitting layer and the anode, and an electron injection layer provided between the light-emitting layer and the cathode.
7. The lighting device of claim 6,
the hole injection layer further comprises a hole transport material, and the electron injection layer further comprises an electron transport material; alternatively, the first and second electrodes may be,
the organic electroluminescent device further includes a hole transport layer disposed between the hole injection layer and the anode, and an electron transport layer disposed between the electron injection layer and the cathode.
8. The lighting device of claim 1,
the lighting device is a car lamp.
9. A method of making a lighting device, comprising:
forming an organic electroluminescent device on a substrate;
fixing an electrochromic device on one side of a light-emitting surface of the organic electroluminescent device, wherein the contact surfaces of the electrochromic device and the organic electroluminescent device are mutually insulated, the electroluminescent device comprises an electroluminescent layer, and the electroluminescent layer covers the light-emitting surface of the organic electroluminescent device; the electrochromic device comprises an electrochromic layer, and the electrochromic layer covers the light emitting surface of the organic electroluminescent device;
the light transmittance of the electrochromic device when the electrochromic device is electrified is smaller than that of the electrochromic device when the electrochromic device is not electrified;
the electrochromic device further includes: a first transparent electrode and a second transparent electrode which are arranged on two sides of the electrochromic layer in a laminated manner; and an ion storage layer and an electrolyte layer disposed between the electrochromic layer and one of the first and second transparent electrodes;
wherein, when the first transparent electrode is connected with a positive electrode or a low voltage, the ion storage layer and the electrolyte layer are sequentially stacked and arranged between the first transparent electrode and the electrochromic layer; when the second transparent electrode is connected with a positive electrode or is low in voltage, the ion storage layer and the electrolyte layer are sequentially stacked and arranged between the second transparent electrode and the electrochromic layer.
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| CN110196522B (en) * | 2019-06-26 | 2021-09-03 | 上海洞舟实业有限公司 | Preparation method of white light electrochromic device |
| CN112394437A (en) * | 2019-08-13 | 2021-02-23 | 陕西坤同半导体科技有限公司 | Cover plate, display device and electronic equipment |
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| CN101510038A (en) * | 2009-03-16 | 2009-08-19 | 浙江大学 | Method for producing full-solid electrochromic device |
| CN101833211A (en) * | 2010-04-01 | 2010-09-15 | 中国科学院宁波材料技术与工程研究所 | Intelligent dimming glass |
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