CN104466006A - Electroluminescent device and manufacturing method thereof - Google Patents
Electroluminescent device and manufacturing method thereof Download PDFInfo
- Publication number
- CN104466006A CN104466006A CN201410722612.1A CN201410722612A CN104466006A CN 104466006 A CN104466006 A CN 104466006A CN 201410722612 A CN201410722612 A CN 201410722612A CN 104466006 A CN104466006 A CN 104466006A
- Authority
- CN
- China
- Prior art keywords
- electrode
- relief pattern
- electroluminescence layer
- electroluminescent device
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/20—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate
- H01L33/24—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate of the light emitting region, e.g. non-planar junction
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/80—Constructional details
- H10K30/865—Intermediate layers comprising a mixture of materials of the adjoining active layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Abstract
The invention discloses an electroluminescent device. The electroluminescent device comprises a substrate, a first electrode, a second electrode and an electroluminescent layer, wherein the first electrode and the second electrode are arranged on one side of the substrate, the electroluminescent layer is clamped between the first electrode and the second electrode and comprises a first surface and a second surface, the first surface makes contact with the second electrode, the second surface makes contact with the first electrode, a first concave-convex pattern is arranged on the first surface, a second concave-convex pattern matched with the first concave-convex pattern is arranged on the second surface, and the concave-convex height of the first concave-convex pattern is larger than the thickness of the electroluminescent layer. The invention discloses a manufacturing method of the electroluminescent device. The concave-convex height of the first concave-convex pattern is larger than the thickness of the electroluminescent layer, and therefore the electroluminescent layer is in a bent layer shape, the surface area of the electroluminescent layer is greatly enlarged, luminance is improved, and cost is effectively reduced.
Description
Technical field
The present invention relates to LED technology field, particularly relate to a kind of electroluminescent device and preparation method thereof.
Background technology
Electroluminescence (Electro luminescence, be called for short EL) be material under certain electric field action excite by corresponding electric energy and the luminescence phenomenon that produces.Electroluminescence EL is a kind of is directly the phenomenon of luminous energy by electric energy conversion.Electroluminescence causes the very big hobby of people as a kind of planar light source.People's attempt realizes lighting source from point-source of light, line source to the revolution of area source.Since inorganic light-emitting plate zinc sulphide and gallium arsenide phosphide compound invention, electroluminescence has been widely used in a lot of field and has achieved the achievement attracted people's attention.At present, electroluminescent device mainly comprises: organic electroluminescence device (OLED), high molecule electroluminescent device (PLED) and inorganic electroluminescence device.Wherein, organic electroluminescence device due to have, various colors wide from main light emission, low-voltage direct-current driving, all solidstate, visual angle, easily with the advantage such as integrated circuit mates, to be widely used prospect in flat panel display and lighting field.
As shown in Figure 1, existing electroluminescent device 1 generally includes substrate 11, first electrode 12, electroluminescence layer 13 and the second electrode 14 that stack gradually.Its luminescence mechanism is that the hole that produced by the first electrode 12 and the second electrode 14 and electronics are combined into exciton in electroluminescence layer 13, the energy trasfer of exciton is to light emitting molecule, the electronics in light emitting molecule is made to be excited to excitation state, and excitation state is a unsure state, sharp process is gone to produce visible ray.The electroluminescence layer 13 of OLED generally includes electron injecting layer, electron transfer layer, one or more luminescent layer, hole transmission layer and hole injection layer.Generally, the first electrode 12 is anodes, and the second electrode 14 is negative electrodes.But electroluminescence layer 13, at the finite surface area of unit are, makes the luminous efficiency of existing electroluminescent device 1 low.
At present, the product based on organic electroluminescence device comes out, but due to the luminous efficiency of organic electroluminescence device not high, manufacturing cost is higher, the commercialization process of the organic electroluminescence device hindered.
Summary of the invention
The object of the invention is to, a kind of electroluminescent device and preparation method thereof is provided, to improve the luminous efficiency of electroluminescent device.
For solving the problems of the technologies described above, the invention provides a kind of electroluminescent device, comprising:
Substrate;
Be arranged at the first electrode of the side of described substrate, the second electrode; And
Be folded in the electroluminescence layer between described first electrode, the second electrode;
It is characterized in that, described electroluminescence layer comprises first surface and second surface, described first surface contacts with described second electrode, described second surface contacts with described first electrode, the first surface of described electroluminescence layer has the first relief pattern, the second surface of described electroluminescence layer has the second relief pattern matched with described first relief pattern, and the height of concave convex of described first relief pattern is greater than the thickness of described electroluminescence layer.
Optionally, in described electroluminescent device, described first relief pattern comprises the spherical crown of at least one depression, and described second relief pattern comprises the spherical crown of at least one projection; Or described first relief pattern comprises the spherical crown of at least one projection, described second relief pattern comprises the spherical crown of at least one depression.
Optionally, in described electroluminescent device, described first relief pattern comprises the different spherical crown of multiple height or the different spherical crown of multiple basal diameter.
Optionally, in described electroluminescent device, the thickness of described first electrode is 10nm ~ 50nm, the thickness of described second electrode is 50nm ~ 200nm, the thickness of described electroluminescence layer is 100nm ~ 1 μm, the height of concave convex of described first relief pattern is 2 μm ~ 2000 μm, and the concavo-convex width of described first relief pattern is 10 μm ~ 10000 μm.
Optionally, in described electroluminescent device, the material of described substrate and the material of the first electrode are transparent material, and the material of described second electrode is reflecting material; Or the material of described second electrode and the first electrode is transparent material, the material of described substrate is reflecting material; Or the material of described second electrode is transparent material, the material of described first electrode is reflecting material.
According to another side of the present invention, a kind of preparation method of electroluminescent device is also provided, comprises:
The first relief pattern is prepared on the surface of the side of substrate;
The first electrode is prepared in the side of described substrate, described first electrode surface has to the surface of described substrate side the second relief pattern matched with described first relief pattern, and the surface that described first electrode deviates from described substrate side has described first relief pattern;
Electroluminescence layer is prepared in the side deviating from described substrate at described first electrode, described electroluminescence layer has described second relief pattern towards the surface of described first electrode side, and the surface that described electroluminescence layer deviates from described first electrode side has described first relief pattern; And
The second electrode is prepared in the side deviating from described first electrode at described electroluminescence layer, described second electrode surface has described second relief pattern to the surface of described electroluminescence layer side, and the surface that described second electrode deviates from described electroluminescence layer side has described first relief pattern;
Wherein, the height of concave convex of described first relief pattern is greater than the thickness of described electroluminescence layer.
Optionally, in the preparation method of described electroluminescent device, described electroluminescence layer is organic luminous layer, adopts evaporation process to prepare described electroluminescence layer.
Optionally, in the preparation method of described electroluminescent device, the material of described first electrode is reflecting material, adopts sputtering technology to prepare described first electrode; Or described first electrode is transparent material, evaporation process is adopted to prepare described first electrode.
Optionally, in the preparation method of described electroluminescent device, the material of described second electrode is reflecting material, adopts sputtering technology to prepare described second electrode; Or described second electrode is transparent material, evaporation process is adopted to prepare described second electrode.
Optionally, in the preparation method of described electroluminescent device, prepare described first relief pattern by the mode of impression or machining on the surface of the side of described substrate.
The invention provides in a kind of electroluminescent device and preparation method thereof, described electroluminescence layer comprises first surface and second surface, described first surface contacts with described second electrode, described second surface contacts with described first electrode, the first surface of described electroluminescence layer has the first relief pattern, the second surface of described electroluminescence layer has the second relief pattern matched with described first relief pattern, compared with prior art, the height of concave convex of described first relief pattern is greater than the thickness of described electroluminescence layer, make described electroluminescence layer in bending stratiform, substantially increase the surface area of described electroluminescence layer, more exciton can be produced in the described substrate of unit are, thus improve the luminous efficiency of electroluminescent device, improve the luminosity of unit are, the Guangde brightness obtaining needs compared with the electroluminescent device of small size can be used, can effectively reduce costs.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of electroluminescent device in prior art;
Fig. 2 is the schematic diagram of the electroluminescent device of first embodiment of the invention;
Fig. 3 is the schematic diagram that the electroluminescent device of first embodiment of the invention sends converging light;
Fig. 4 is the flow chart of the preparation method of the electroluminescent device of first embodiment of the invention;
Fig. 5-Fig. 8 is the schematic diagram of device architecture in the preparation method of the electroluminescent device of first embodiment of the invention;
Fig. 9 is the schematic diagram of the electroluminescent device of second embodiment of the invention;
Figure 10 is the schematic diagram that the electroluminescent device of second embodiment of the invention sends diverging light;
Figure 11 is the schematic diagram that the electroluminescent device of third embodiment of the invention sends diverging light;
Figure 12 is the schematic diagram that the electroluminescent device of fourth embodiment of the invention sends diverging light;
Figure 13 is the schematic diagram of the electroluminescent device of fifth embodiment of the invention.
Specific embodiment
Below in conjunction with schematic diagram, electroluminescent device of the present invention is described in more detail, which show the preferred embodiments of the present invention, should be appreciated that those skilled in the art can revise the present invention described here, and still realize advantageous effects of the present invention.Therefore, following description is appreciated that extensively knowing for those skilled in the art, and not as limitation of the present invention.
In the following passage, more specifically the present invention is described by way of example with reference to accompanying drawing.According to the following describes, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.
Core concept of the present invention is, the invention provides a kind of electroluminescent device, comprising: substrate; Be arranged at the first electrode of the side of described substrate, the second electrode; And the electroluminescence layer be folded between described first electrode, the second electrode; It is characterized in that, described electroluminescence layer comprises first surface and second surface, described first surface contacts with described second electrode, described second surface contacts with described first electrode, the first surface of described electroluminescence layer has the first relief pattern, the second surface of described electroluminescence layer has the second relief pattern matched with described first relief pattern, and the height of concave convex of described first relief pattern is greater than the thickness of described electroluminescence layer.Described electroluminescence layer is in bending stratiform, substantially increase the surface area of described electroluminescence layer, more exciton can be produced in the described substrate of unit are, thus increase the energy of light, the described substrate of unit are realizes higher luminosity, improve the luminosity of unit are, the Guangde brightness obtaining needs compared with the electroluminescent device of small size can be used, can effectively reduce costs.
According to above-mentioned core concept, the present invention also provides a kind of preparation method of electroluminescent device, comprising:
Step S11, prepares the first relief pattern on the surface of the side of substrate;
Step S12, the first electrode is prepared in the side of described substrate, described first electrode surface has to the surface of described substrate side the second relief pattern matched with described first relief pattern, and the surface that described first electrode deviates from described substrate side has described first relief pattern;
Step S13, electroluminescence layer is prepared in the side deviating from described substrate at described first electrode, described electroluminescence layer has described second relief pattern towards the surface of described first electrode side, and the surface that described electroluminescence layer deviates from described first electrode side has described first relief pattern; And
Step S14, the second electrode is prepared in the side deviating from described first electrode at described electroluminescence layer, described second electrode surface has described second relief pattern to the surface of described electroluminescence layer side, and the surface that described second electrode deviates from described electroluminescence layer side has described first relief pattern.
Below enumerate several embodiments of described electroluminescent device and preparation method thereof, to clearly demonstrate content of the present invention, will be clear that, content of the present invention is not restricted to following examples, and other improvement by the routine techniques means of those of ordinary skill in the art are also within thought range of the present invention.
First embodiment
Refer to Fig. 2-Fig. 3 and illustrate the first embodiment of the present invention, wherein, Fig. 2 is the schematic diagram of the electroluminescent device of first embodiment of the invention; Fig. 3 is the schematic diagram that the electroluminescent device of first embodiment of the invention sends converging light.In the present embodiment, described first relief pattern comprises a kind of spherical crown 111 of projection.
As shown in Figure 2, described electroluminescent device 2 comprises substrate 110, first electrode 120, electroluminescence layer 130 and the second electrode 140 that stack gradually.The hole produced after described first electrode 120 and the second electrode 140 are energized and electronics are combined into exciton in described electroluminescence layer 130, the energy trasfer of exciton is to light emitting molecule, the electronics in light emitting molecule is made to be excited to excitation state, and excitation state is a unsure state, sharp process is gone to produce visible ray.Common, described electroluminescence layer 130 generally includes electron injecting layer, electron transfer layer, one or more luminescent layer, hole transmission layer and hole injection layer, and this is what it will be appreciated by those skilled in the art that, and therefore not to repeat here.Generally, the first electrode 120 is anodes, and the second electrode 140 is negative electrodes.
In the present embodiment, the material of described substrate 110 is transparent material, such as, the combination of one or more in the transparent insulation material such as sapphire, silicon dioxide.
Described first electrode 120 and the second electrode 140 are arranged at the side of described substrate 110.In the present embodiment, the material of described first electrode 120 is transparent material, the such as transparent conductive material such as zinc oxide, tin indium oxide, and the material of described second electrode 140 is reflecting material, and such as metal etc. can the electric conducting material of reverberation.Preferably, the thickness of described first electrode 120 is 10nm ~ 50nm, such as 20nm, 30nm, 40nm etc., and the thickness of described second electrode 140 is 50nm ~ 200nm, such as 100nm, 150nm etc.The thickness of described first electrode 120 and the second electrode 140 is not limited to above-mentioned scope of disclosure, but the thickness of described first electrode 120 and the second electrode 140 is generally at nanoscale, is no more than 1 μm.
Described electroluminescence layer 130 is folded between described first electrode 120, second electrode 140, and in the present embodiment, described electroluminescence layer 130 is organic luminous layer, and described electroluminescent device 2 is organic electroluminescence device.Described electroluminescence layer 130 comprises first surface and second surface, described first surface contacts with described second electrode 140, described second surface contacts with described first electrode 120, the first surface of described electroluminescence layer 130 has the first relief pattern, the second surface of described electroluminescence layer 130 has the second relief pattern matched with described first relief pattern, namely described first relief pattern is identical with described second relief pattern, and described electroluminescence layer 130 can seamlessly be coincide with described first electrode 120, second electrode 140.
Preferably, as shown in Figure 2, described substrate 110 towards the surface of described first electrode 120 side, described first electrode 120 towards the surface of described electroluminescence layer 130 side, described second electrode 140 surface that deviates from described electroluminescence layer 130 side all has described first relief pattern, described first electrode 120 all has described second relief pattern towards the surface of described substrate 110 side, described second electrode 140 towards the surface of described electroluminescence layer 130 side.
Wherein, the height of concave convex H1 of described first relief pattern (the protruding peak of described first relief pattern to described first relief pattern depression minimum point between distance) be greater than the thickness T1 of described electroluminescence layer 130, make described electroluminescence layer 130 in bending stratiform, the surface area of described electroluminescence layer 130 can be increased widely, thus the luminous intensity of described electroluminescence layer 130 in the described substrate 110 improving unit are.The concavo-convex width a1 of described first relief pattern is greater than the wavelength of visible ray out and away.
In the present embodiment, described first relief pattern comprises a kind of spherical crown 111 of projection, then described second relief pattern comprises a kind of spherical crown 112 of depression.Described first relief pattern comprises the spherical crown 111 of the projection of some arrangements.The height of concave convex H1 of described first relief pattern is the height of described spherical crown 111, and the concavo-convex width a1 of described first relief pattern is the basal diameter of described spherical crown 111.
Preferably, the thickness of described electroluminescence layer 130 is 100nm ~ 1 μm, such as 200nm, 500nm, 800nm etc.The height of concave convex H1 of described first relief pattern is 2 μm ~ 2000 μm, such as 10 μm, 50 μm, 1000 μm etc.The concavo-convex width a1 of described first relief pattern is 10 μm ~ 10000 μm, such as 100 μm, 500 μm, 1000 μm, 5000 μm etc.Such as, in the present embodiment, the height of concave convex H1 of described first relief pattern is 5 μm, and the concavo-convex width a1 of described first relief pattern is 20 μm, then the surface area of a spherical crown 111 is:
S1＝π(a1
2/4+H1
2)
＝μm
2
＝125πμm
2
And the area of plane that diameter is the circle of 20 μm is:
S2＝π×20
2/4μm
2
＝100πμm
2
S1 exceeds 25% than S2, then illustrate, adopts the described electroluminescence layer 130 in the present embodiment to exceed roughly 25% than the surface area of electroluminescence layer of the prior art, is conducive to the luminance improving described electroluminescence layer 130.
As shown in Figure 3, in the present embodiment, described electroluminescent device 2 is backlight type electroluminescent device, and described substrate 110 and the first electrode 120 are transparent, and described second electrode 140 has reflective.When described electroluminescence layer 130 electroluminescence, light (dotted arrow as in Fig. 3) by as described in after the second electrode 140 reflects, the side deviating from described first electrode 120 from described substrate 110 sends.Because described second electrode 140 has described second relief pattern (spherical crown 112 of the depression of some arrangements) towards the side of described electroluminescence layer 130, the light of reflection in assembling shape, thus can obtain specific Light distribation.Certainly, different described second relief patterns can obtain different Light distribation, specifically can arrange as required.
Below in conjunction with Fig. 4-Fig. 9, illustrate the preparation method of the electroluminescent device in the present embodiment, wherein, Fig. 4 is the flow chart of the preparation method of the electroluminescent device of first embodiment of the invention; Fig. 5-Fig. 8 is the schematic diagram of device architecture in the preparation method of the electroluminescent device of first embodiment of the invention.
First, as shown in Figure 5, carry out step S11, prepare the first relief pattern on the surface of the side of described substrate 110.Preferably, described first relief pattern can be prepared on the surface of the side of described substrate 110, to form described spherical crown 111 in the side of described substrate 110 by the mode of impression or machining.Certainly, the method forming described first relief pattern is not limited to the mode of impression or machining, can also form described first relief pattern by methods such as etchings.
Then, as shown in Figure 6, carry out step S12, the first electrode 120 is prepared in the side of described substrate 110, thickness due to described first electrode 120 is less than the height of concave convex H1 of described first relief pattern, so, the part that described first electrode 120 corresponds to described substrate 110 projection (i.e. described spherical crown 111) is protruding upward, and the surface making described first electrode 120 deviate from described substrate 110 side forms projection, described spherical crown 111 in described substrate 110 is transferred on described first electrode 120, make described first electrode 120 in bending stratiform, be formed with towards the surface of described substrate 110 side described second relief pattern matched with described first relief pattern at described first electrode 120, the surface deviating from described substrate 110 side at described first electrode 120 is formed with described first relief pattern.In the present embodiment, described first electrode 120 is transparent material, preferably adopts evaporation process to prepare described first electrode 120.
Then, as shown in Figure 7, carry out step S13, described electroluminescence layer 130 is prepared in the side deviating from described substrate 110 at described first electrode 120, thickness due to described electroluminescence layer 130 is less than the height of concave convex H1 of described first relief pattern, so, the part that described electroluminescence layer 130 corresponds to described first electrode 120 projection is protruding upward, and the surface making described first electrode 120 deviate from described substrate 110 side forms projection, described spherical crown 111 is transferred on described electroluminescence layer 130, make described electroluminescence layer 130 in bending stratiform, described second relief pattern is formed with towards the surface of described first electrode 120 side at described electroluminescence layer 130, the surface deviating from described first electrode 120 side at described electroluminescence layer 130 is formed with described first relief pattern.In the present embodiment, described electroluminescence layer 130 is organic luminous layer, preferably adopts evaporation process to prepare described electroluminescence layer 130.
Finally, as shown in Figure 8, carry out step S14, the second electrode 140 is prepared in the side deviating from described first electrode 120 at described electroluminescence layer 130, thickness due to described second electrode 140 is less than the height of concave convex H1 of described first relief pattern, so, described spherical crown 111 is transferred on described second electrode 140, make described second electrode 140 in bending stratiform, described second electrode 140 has described second relief pattern towards the surface of described electroluminescence layer 130 side, the surface that described second electrode 140 deviates from described electroluminescence layer 130 side has described first relief pattern.In the present embodiment, the material of described second electrode 140 is reflecting material, preferably adopts sputtering technology to prepare described second electrode 140.
In the present embodiment, described electroluminescence layer 130 is in bending stratiform, substantially increase the surface area of described electroluminescence layer 130, more exciton can be produced in the described substrate 110 of unit are, thus increase the energy of light, the described substrate 100 of unit are realizes higher luminosity, effectively reduces costs.
Second embodiment
Refer to Fig. 9, Fig. 9 is the schematic diagram of the electroluminescent device of second embodiment of the invention.In fig .9, reference number represents the structure that the statement identical with Fig. 2-Fig. 3 is identical with the first embodiment.The electroluminescent device 3 of described second embodiment is substantially identical with the electroluminescent device 2 of described first embodiment, its difference is: described first relief pattern comprises the spherical crown 211 of at least one depression, and described second relief pattern comprises the spherical crown 212 of at least one projection.
In the present embodiment, described first relief pattern comprises a kind of spherical crown 211 of depression, then described second relief pattern comprises a kind of spherical crown 212 of projection.Described first relief pattern comprises the spherical crown 211 of the depression of some arrangements.The height of concave convex H2 of described first relief pattern is the height of described spherical crown 211, and the concavo-convex width a2 of described first relief pattern is the basal diameter of described spherical crown 211.
Wherein, the height of concave convex H2 of described first relief pattern is greater than the thickness T1 of described electroluminescence layer 130, make described electroluminescence layer 130 in bending stratiform, the surface area of described electroluminescence layer 130 can be increased widely, thus the luminous intensity of described electroluminescence layer 130 in the described substrate 110 improving unit are.The concavo-convex width a2 of described first relief pattern is greater than the wavelength of visible ray out and away.The surface area of the described electroluminescence layer 130 in employing the present embodiment is also greater than the surface area than electroluminescence layer of the prior art, is also conducive to the luminance improving described electroluminescence layer 130.
As shown in Figure 10, in the present embodiment, described electroluminescent device 3 is backlight type electroluminescent device, and described substrate 110 and the first electrode 120 are transparent, and described second electrode 140 has reflective.When described electroluminescence layer 130 electroluminescence, light (dotted arrow as in Figure 10) by as described in after the second electrode 140 reflects, the side deviating from described first electrode 120 from described substrate 110 sends.Because described second electrode 140 has described second relief pattern (spherical crown 212 of the projection of some arrangements) towards the side of described electroluminescence layer 130, the light of reflection is divergent shape, thus can obtain specific Light distribation.Certainly, different described second relief patterns can obtain different Light distribation, specifically can arrange as required.
3rd embodiment
Refer to Figure 11, Figure 11 is the schematic diagram of the electroluminescent device of third embodiment of the invention.In fig. 11, reference number represents the structure that the statement identical with Fig. 2-Fig. 3 is identical with the first embodiment.The electroluminescent device 4 of described 3rd embodiment is substantially identical with the electroluminescent device 2 of described first embodiment, its difference is: the material of described second electrode 140 is transparent material, the material of described first electrode 120 is reflecting material, the material of described substrate 110 does not limit, can be transparent material, also can be reflecting material etc.In the present embodiment, described electroluminescent device 4 is front smooth formula electroluminescent device, when described electroluminescence layer 130 electroluminescence, light (dotted arrow as in Figure 11) by as described in after the first electrode 120 reflects, the side deviating from described electroluminescence layer 130 from described second electrode 140 sends.Because described first electrode 120 has described first relief pattern (spherical crown of the projection of some arrangements) towards the side of described electroluminescence layer 130, the light of reflection is divergent shape, thus can obtain the Light distribation dispersed.
In the present embodiment, because the material of described first electrode 120 is reflecting material, so in described step S12, sputtering technology is preferably adopted to prepare described first electrode 120; Described second electrode 140 is transparent material, so in described step S14, preferably adopts evaporation process to prepare described second electrode 140.
4th embodiment
Refer to Figure 12, Figure 12 is the schematic diagram of the electroluminescent device of fourth embodiment of the invention.In fig. 12, reference number represents the structure that the statement identical with Fig. 2-Fig. 3 is identical with the first embodiment.The electroluminescent device 5 of described 4th embodiment is substantially identical with the electroluminescent device 2 of described first embodiment, and its difference is: the material of described substrate 110 is reflecting material, and the material of described first electrode 120 and described second electrode 140 is transparent material.In the present embodiment, described electroluminescent device 4 is front smooth formula electroluminescent device, when described electroluminescence layer 130 electroluminescence, light (dotted arrow as in Figure 12) by as described in after substrate 110 reflects, the side deviating from described electroluminescence layer 130 from described second electrode 140 sends.Because described substrate 110 has described first relief pattern (spherical crown of the projection of some arrangements) towards the side of described first electrode 120, the light of reflection is divergent shape, thus can obtain the Light distribation dispersed.
5th embodiment
Refer to Figure 13, Figure 13 is the schematic diagram of the electroluminescent device of fifth embodiment of the invention.In fig. 13, reference number represents the structure that the statement identical with Fig. 2-Fig. 3 is identical with the first embodiment.The electroluminescent device 6 of described 5th embodiment is substantially identical with the electroluminescent device 2 of described first embodiment, its difference is: described first relief pattern comprises multiple different spherical crown, the height of described spherical crown is different, or the basal diameter of described spherical crown is different, or the height of described spherical crown and basal diameter all different.
In fig. 13, comprise two kinds of highly different spherical crowns for described first relief pattern to be described.The surface that described electroluminescence layer 130 deviates from described substrate 110 side has the first relief pattern, and described electroluminescence layer 130 has towards the surface of described substrate 110 side the second relief pattern matched with described first relief pattern.In the present embodiment, described first relief pattern comprises two kinds of protruding spherical crowns: the first highly protruding spherical crown 311 and the second highly protruding spherical crown 321, then described second relief pattern comprises the spherical crowns of two kinds of depressions: first highly caves in spherical crown 312 and second highly depression spherical crown 322.
Described first highly protruding spherical crown 311 and the second highly protruding spherical crown 321 can deviate from the spaced surface arrangement of described substrate 110 side at described electroluminescence layer 130, the described first highly protruding spherical crown 311 and the second highly protruding spherical crown 321 can also deviate from the random arrangement of surfaces of described substrate 110 side at described electroluminescence layer 130.Described first relief pattern has two kinds of height of concave convexes: the height H 4 of the described first highly protruding spherical crown 311, height H 3, two kinds of height of concave convexes of the described second highly protruding spherical crown 321 are all greater than the thickness of described electroluminescence layer 130.
Described first relief pattern has two kinds of concavo-convex width: the basal diameter a4 of the described first highly protruding spherical crown 311, the basal diameter a3 of the described second highly protruding spherical crown 321, in the present embodiment, the basal diameter a4 of the described first highly protruding spherical crown 311 is equal with the basal diameter a3 of the described second highly protruding spherical crown 321, and is all greater than the wavelength of visible ray.
In the present embodiment, wherein, the height of concave convex of described first relief pattern is greater than (comprising the height H 3 of the height H 4 of the described first highly protruding spherical crown 311, the described second highly protruding spherical crown 321) thickness of described electroluminescence layer 130, make described electroluminescence layer 130 in bending stratiform, the surface area of described electroluminescence layer 130 can also be increased widely, thus the luminous intensity of described electroluminescence layer 130 in the described substrate 110 improving unit are.
Certainly, the height that described multiple different spherical crown is not limited to described spherical crown is different, the basal diameter of all right described spherical crown is different, or the height of described spherical crown and basal diameter all different, according to foregoing description of the present invention, the basal diameter of described spherical crown is different, or the height of described spherical crown and all different structure of basal diameter are for persons of ordinary skill in the art may appreciate that therefore not to repeat here.
Preferred embodiment of the present invention is described above, but electroluminescent device of the present invention is not limited to above-mentioned disclosed content, such as:
In other embodiments of the invention, described electroluminescence layer can also be inorganic light emitting layers, described electroluminescent device is inorganic electroluminescence device, the luminous efficiency of described electroluminescence layer can also be increased, also within thought range of the present invention by the surface area increasing described electroluminescence layer;
In the present invention, described first relief pattern is not limited to comprise some raised or sunken spherical crowns, described first relief pattern can also comprise some raised or sunken column structures, trapezium structure or tapered structure etc., the surface area of described electroluminescence layer can also be increased, also within thought range of the present invention, according to foregoing description of the present invention, this is what it will be appreciated by those skilled in the art that, and therefore not to repeat here.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. an electroluminescent device, comprising:
Substrate;
Be arranged at the first electrode of the side of described substrate, the second electrode; And
Be folded in the electroluminescence layer between described first electrode, the second electrode;
It is characterized in that, described electroluminescence layer comprises first surface and second surface, described first surface contacts with described second electrode, described second surface contacts with described first electrode, the first surface of described electroluminescence layer has the first relief pattern, the second surface of described electroluminescence layer has the second relief pattern matched with described first relief pattern, and the height of concave convex of described first relief pattern is greater than the thickness of described electroluminescence layer.
2. electroluminescent device as claimed in claim 1, is characterized in that, described first relief pattern comprises the spherical crown of at least one depression, and described second relief pattern comprises the spherical crown of at least one projection; Or described first relief pattern comprises the spherical crown of at least one projection, described second relief pattern comprises the spherical crown of at least one depression.
3. electroluminescent device as claimed in claim 2, is characterized in that, described first relief pattern comprises the different spherical crown of multiple height or the different spherical crown of multiple basal diameter.
4. electroluminescent device as claimed in claim 1, it is characterized in that, the thickness of described first electrode is 10nm ~ 50nm, the thickness of described second electrode is 50nm ~ 200nm, the thickness of described electroluminescence layer is 100nm ~ 1 μm, the height of concave convex of described first relief pattern is 2 μm ~ 2000 μm, and the concavo-convex width of described first relief pattern is 10 μm ~ 10000 μm.
5. electroluminescent device as claimed in claim 1, it is characterized in that, the material of described substrate and the material of the first electrode are transparent material, and the material of described second electrode is reflecting material; Or the material of described second electrode and the first electrode is transparent material, the material of described substrate is reflecting material; Or the material of described second electrode is transparent material, the material of described first electrode is reflecting material.
6. a preparation method for electroluminescent device, is characterized in that, comprising:
The first relief pattern is prepared on the surface of the side of substrate;
The first electrode is prepared in the side of described substrate, described first electrode surface has to the surface of described substrate side the second relief pattern matched with described first relief pattern, and the surface that described first electrode deviates from described substrate side has described first relief pattern;
Electroluminescence layer is prepared in the side deviating from described substrate at described first electrode, described electroluminescence layer has described second relief pattern towards the surface of described first electrode side, and the surface that described electroluminescence layer deviates from described first electrode side has described first relief pattern; And
The second electrode is prepared in the side deviating from described first electrode at described electroluminescence layer, described second electrode surface has described second relief pattern to the surface of described electroluminescence layer side, and the surface that described second electrode deviates from described electroluminescence layer side has described first relief pattern;
Wherein, the height of concave convex of described first relief pattern is greater than the thickness of described electroluminescence layer.
7. the preparation method of electroluminescent device as claimed in claim 6, it is characterized in that, described electroluminescence layer is organic luminous layer, adopts evaporation process to prepare described electroluminescence layer.
8. the preparation method of electroluminescent device as claimed in claim 6, it is characterized in that, the material of described first electrode is reflecting material, adopts sputtering technology to prepare described first electrode; Or described first electrode is transparent material, evaporation process is adopted to prepare described first electrode.
9. the preparation method of electroluminescent device as claimed in claim 6, it is characterized in that, the material of described second electrode is reflecting material, adopts sputtering technology to prepare described second electrode; Or described second electrode is transparent material, evaporation process is adopted to prepare described second electrode.
10. the preparation method of electroluminescent device as claimed in claim 6, is characterized in that, prepares described first relief pattern by the mode of impression or machining on the surface of the side of described substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410722612.1A CN104466006A (en) | 2014-12-02 | 2014-12-02 | Electroluminescent device and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410722612.1A CN104466006A (en) | 2014-12-02 | 2014-12-02 | Electroluminescent device and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104466006A true CN104466006A (en) | 2015-03-25 |
Family
ID=52911720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410722612.1A Pending CN104466006A (en) | 2014-12-02 | 2014-12-02 | Electroluminescent device and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104466006A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108232020A (en) * | 2016-12-20 | 2018-06-29 | 乐金显示有限公司 | Organic Light Emitting Diode and the organic light emitting apparatus including the Organic Light Emitting Diode |
| CN108258134A (en) * | 2016-12-28 | 2018-07-06 | 乐金显示有限公司 | Top luminescent type organic LED display device |
| CN108493771A (en) * | 2018-03-12 | 2018-09-04 | 广东欧珀移动通信有限公司 | Laser generator, laser projection module, depth camera and electronic device |
| CN108877573A (en) * | 2017-05-08 | 2018-11-23 | 法雷奥市光（中国）车灯有限公司 | Pattern luminescent panel, light emitting device, car light and motor vehicles |
| CN109037283A (en) * | 2018-07-25 | 2018-12-18 | 云谷（固安）科技有限公司 | A kind of preparation method of substrate, display panel, display device and display panel |
| CN109192765A (en) * | 2018-09-17 | 2019-01-11 | 武汉华星光电半导体显示技术有限公司 | A kind of organic light emitting diode display and preparation method thereof |
| CN112259655A (en) * | 2020-08-31 | 2021-01-22 | 华灿光电（浙江）有限公司 | Light emitting diode epitaxial wafer and preparation method thereof |
| CN114171651A (en) * | 2021-12-03 | 2022-03-11 | 北京翌光医疗科技研究院有限公司 | Stretchable light-emitting device |
-
2014
- 2014-12-02 CN CN201410722612.1A patent/CN104466006A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11289683B2 (en) | 2016-12-20 | 2022-03-29 | Lg Display Co., Ltd. | Organic light emitting diode including convex curve or concave curve and organic light emitting device including the same |
| CN108232020A (en) * | 2016-12-20 | 2018-06-29 | 乐金显示有限公司 | Organic Light Emitting Diode and the organic light emitting apparatus including the Organic Light Emitting Diode |
| US11812636B2 (en) | 2016-12-20 | 2023-11-07 | Lg Display Co., Ltd. | Organic light emitting diode having overcoat layer and organic light emitting device including the same |
| US10381601B2 (en) | 2016-12-20 | 2019-08-13 | Lg Display Co., Ltd. | Organic electroluminescence display device including convex curve or concave curve and method of fabricating the same |
| CN111276626A (en) * | 2016-12-20 | 2020-06-12 | 乐金显示有限公司 | Organic light emitting diode and organic light emitting device including the same |
| US10714709B2 (en) | 2016-12-20 | 2020-07-14 | Lg Display Co., Ltd. | Organic electroluminescence display device including convex curve or concave curve and method of fabricating the same |
| CN111276626B (en) * | 2016-12-20 | 2023-07-11 | 乐金显示有限公司 | Organic light emitting diode and organic light emitting device including the same |
| CN108258134A (en) * | 2016-12-28 | 2018-07-06 | 乐金显示有限公司 | Top luminescent type organic LED display device |
| CN108258134B (en) * | 2016-12-28 | 2020-04-10 | 乐金显示有限公司 | Top-emission organic light emitting diode display device |
| CN108877573A (en) * | 2017-05-08 | 2018-11-23 | 法雷奥市光（中国）车灯有限公司 | Pattern luminescent panel, light emitting device, car light and motor vehicles |
| CN108493771A (en) * | 2018-03-12 | 2018-09-04 | 广东欧珀移动通信有限公司 | Laser generator, laser projection module, depth camera and electronic device |
| CN109037283A (en) * | 2018-07-25 | 2018-12-18 | 云谷（固安）科技有限公司 | A kind of preparation method of substrate, display panel, display device and display panel |
| CN109192765A (en) * | 2018-09-17 | 2019-01-11 | 武汉华星光电半导体显示技术有限公司 | A kind of organic light emitting diode display and preparation method thereof |
| CN112259655B (en) * | 2020-08-31 | 2021-08-06 | 华灿光电（浙江）有限公司 | Light emitting diode epitaxial wafer and preparation method thereof |
| CN112259655A (en) * | 2020-08-31 | 2021-01-22 | 华灿光电（浙江）有限公司 | Light emitting diode epitaxial wafer and preparation method thereof |
| CN114171651A (en) * | 2021-12-03 | 2022-03-11 | 北京翌光医疗科技研究院有限公司 | Stretchable light-emitting device |
| CN114171651B (en) * | 2021-12-03 | 2024-03-05 | 北京翌光医疗科技研究院有限公司 | Stretchable light-emitting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104466006A (en) | Electroluminescent device and manufacturing method thereof | |
| CN105789260B (en) | Transparent display panel and preparation method thereof | |
| CN103000641B (en) | Array base palte and preparation method thereof, display unit | |
| CN105453292B (en) | Optoelectronic device substrate and optoelectronic device comprising same | |
| CN108258140A (en) | Organic light emitting apparatus | |
| JP2012204103A (en) | Organic electroluminescent element, display device and luminaire | |
| CN104241535A (en) | Organic lighting structure | |
| CN107994059A (en) | Array base palte and its manufacture method | |
| TWI425867B (en) | Organic electroluminescence display device and method of manufacturing the same | |
| US20150280091A1 (en) | Light-emitting device and manufacturing method thereof | |
| CN102760841A (en) | Organic light-emitting diode device and corresponding display device | |
| CN103137881A (en) | Organic electroluminescent device and production method thereof | |
| CN106024835A (en) | Transparent display panel and preparation method thereof | |
| WO2019076129A1 (en) | Light emitting diode, manufacturing method therefor, and display apparatus | |
| CN105826356B (en) | Display panel with high aperture ratio and manufacturing method thereof | |
| Amano et al. | 49.4 L: Late‐News Paper: Highly Transmissive One Side Emission OLED Panel for Novel Lighting Applications | |
| JP2012109245A (en) | Front light unit | |
| US20180175321A1 (en) | Transparent organic light emitting diode and method for manufacturing the same | |
| CN104218158A (en) | Organic light-emitting device and manufacturing method of organic light-emitting device | |
| CN102956677B (en) | A kind of OLED display and preparation method thereof | |
| CN100468819C (en) | Organic electroluminance display structure | |
| KR20110013049A (en) | Organic light emitting device and method for manufacturing the same | |
| CN103943783A (en) | Organic light emitting device and display device | |
| JP2005259469A (en) | Organic electroluminescence display device | |
| KR101489780B1 (en) | Organic light emitting diode and fabrication method the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |