CN1665363A - An organic electroluminescent device with improved working life and manufacturing method thereof - Google Patents
An organic electroluminescent device with improved working life and manufacturing method thereof Download PDFInfo
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- CN1665363A CN1665363A CN 200510063360 CN200510063360A CN1665363A CN 1665363 A CN1665363 A CN 1665363A CN 200510063360 CN200510063360 CN 200510063360 CN 200510063360 A CN200510063360 A CN 200510063360A CN 1665363 A CN1665363 A CN 1665363A
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- separator
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- colored filter
- electroluminescent device
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Abstract
The invention discloses an organic electric light-emitting device, particularly an organic electric light-emitting device that can prolong the service life and its making method, mainly arranging a transparent isolating layer on the top surface of a color filter plate, defining and forming at least a bottom electrode on the transparent isolating layer, then etching to remove the part of the transparent isolating layer uncovered by the bottom electrodes to form a moisture excluding channel so as to dry and exclude the solvent or steam in the color filter plate in the baking course, thus reducing the degrading speed of the organic light-emitting layer and effectively prolonging the service life of the organic electric light-emitting device.
Description
Technical field
The present invention relates to a kind of Organnic electroluminescent device, refer in particular to a kind of Organnic electroluminescent device that improves useful life and preparation method thereof.
Background technology
Flourish along with opto-electronics, people are enjoying the facility that science and technology is brought.Yet, how to produce high image quality and flat-panel screens or light-emitting device cheaply, be the target that all big enterprises make great efforts to reach always.In numerous displays and light-emitting device, Organnic electroluminescent device (OLED) is compared to other light-emitting device, have that self-luminous, high brightness, wide viewing angle, low power consumption, high response speed, panel are frivolous, advantage such as modular construction and making are simple, so especially be subjected to gazing at of various countries research unit and manufacturer.
For various displays or light-emitting device, the demonstration that how to reach full-colorization is the key of success or not often, and with regard to display of organic electroluminescence, reaching the modal method of full-colorization has following three kinds:
1, three-colour light-emitting layer structure: it mainly is that red (R), green (G), blue (B) trichromatic organic electroluminescence assembly is luminous alone, directly to obtain the light-emitting device of full-color effect.
2, photochromic switching film (CCM:Color Change Media): it mainly is to utilize a blue-ray organic electroluminescent assembly as a transmitting illuminant, again with this blue-light excited one photochromic switching film, obtaining RGB (RGB) three primary colors visible light, and by this to reach the purpose of full-colorization.
3, colored filter (CF:Color Filter): it mainly utilizes a white organic electroluminescent assembly as a backlight, highly skilled colored filter is used in collocation, by colored filter by the irradiation of backlight after, to produce full-color display effect.
Wherein, the structure of general photochromic switching film or colored filter, as shown in Figure 1, mainly being configured in of colored filter 11 defines and is provided with a plurality of black matrix"s 117 (BlackMatrix) on the transparent substrates 119, and be provided with a chromatic photoresist 115 in transparent substrates 119 upper surfaces that are not provided with black matrix" 117, to reach the purpose of photochromic conversion.Again; be provided with a coat 113 (over coat) and a printing opacity separator 111 successively in black matrix" 117 and chromatic photoresist 115 tops; silicon dioxide layer for example reaching the effectiveness of protection chromatic photoresist 115 and black matrix" 117, and helps the setting of organic exciting light assembly 13.The structure of organic electroluminescence assembly 13 is with the material of a printing opacity conductive material as lower electrode 131, ITO for example, and grow up in regular turn in lower electrode 131 tops an organic luminous layer 133 and a subtend electrode 135 are arranged.
Yet, in the manufacturing process of colored filter 11, portion's residual fraction aqueous vapor or a few thing solvent within it unavoidably, if not in advance with the aqueous vapor or the removal of solvents of coat 113 inside, then aqueous vapor will penetrate coat 113 and printing opacity separator 111 easily and interact with the organic luminous layer 133 of organic electroluminescence assembly 13, and then cause the deterioration of organic luminous layer 133 and influence useful life of organic light emitting apparatus 10., must grow up before colored filter 11 for this reason, carry out the bake process of a draining processing, with remaining aqueous vapor or removal of solvents with colored filter 11 inside at organic electroluminescence assembly 13.General existing processing mode is sent colored filter 11 to put in the high temperature furnace and is toasted, to remove the remaining aqueous vapor or the solvent of colored filter 11 inside, and avoid organic light emitting apparatus 10 after encapsulation is finished, the remaining aqueous vapor of colored filter 11 inside or solvent and organic electroluminescence assembly 13 interact, and have shortened the useful life of organic light emitting apparatus 10.
Though can be with remaining aqueous vapor or the removal of solvents in colored filter 11 inside by above-mentioned method, yet, because printing opacity separator 111 is unfavorable for allowing in bake process aqueous vapor or solvent pass through, make the draining treatment effect and the efficient of colored filter 11 to show, and also just can't effectively promote the useful life of organic light emitting apparatus 10.
Summary of the invention
For this reason, how at problem that above-mentioned prior art ran into, the Organnic electroluminescent device and preparation method thereof in a kind of improved useful life of novelty is proposed, reaching the purpose that effectively removes inner remaining aqueous vapor of colored filter or solvent, and then prolong the useful life of Organnic electroluminescent device.
Main purpose of the present invention is to provide a kind of Organnic electroluminescent device that improves useful life, be provided with a hydrofuge passage partly not cut a hole by the printing opacity separator that lower electrode covered, helping in bake process, will being present in aqueous vapor or the removal of solvents in the colored filter, and can reduce the degradation speed of organic luminous layer and the useful life of effectively improving Organnic electroluminescent device.
Secondary objective of the present invention, be to provide a kind of manufacture method that improves the Organnic electroluminescent device in useful life, it can utilize an easy printing opacity separator etching step, can help getting rid of the hydrofuge passage of aqueous vapor in the colored filter or solvent to form one, and can reduce by this degradation speed of organic luminous layer and the useful life of effectively improving Organnic electroluminescent device.
For reaching above-mentioned purpose, a kind of Organnic electroluminescent device that improves useful life, it is mainly constructed and includes: a colored filter, include a transparent substrates, upper surface in transparent substrates is provided with a chromatic photoresist and a coat in regular turn, the upper surface of coat then is respectively equipped with at least one printing opacity separator and at least one hydrofuge channel, and the hydrofuge channel is close to this printing opacity separator and is provided with; And an organic electroluminescence assembly, include a bottom electrode, be fixedly arranged on the upper surface of printing opacity separator, and be provided with an organic luminous layer and a subtend electrode in regular turn in the part upper surface of lower electrode.
The present invention still provides a kind of manufacture method that improves the Organnic electroluminescent device in useful life, it mainly includes the following step: definition also forms at least once portion's electrode in the part upper surface of the printing opacity separator of a colored filter, and the part printing opacity separator that will do not covered by lower electrode defines naturally and becomes one and expose the printing opacity separator; Remove exposed printing opacity separator, to form a hydrofuge passage; Colored filter is carried out a draining processing, the aqueous vapor that is present in the colored filter is got rid of by the hydrofuge passage; Reach in the upper surface of lower electrode and be formed with an organic luminous layer and a subtend electrode in regular turn.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the organigram of existing Organnic electroluminescent device;
Fig. 2 is the generalized section of Organnic electroluminescent device one preferred embodiment of the present invention;
Fig. 3 A to Fig. 3 C is respectively the structure sectional view of one embodiment of the invention in each making step;
Fig. 4 is the manufacturing flow chart of one embodiment of the invention.
Wherein, Reference numeral:
10 organic light emitting apparatus, 11 colored filters
111 printing opacity separators, 113 coats
115 chromatic photoresists, 117 black matrix"s
119 transparent substrates, 13 organic electroluminescence assemblies
131 lower electrodes, 133 organic luminous layers
135 counter electrodes, 20 Organnic electroluminescent devices
21 colored filters, 211 printing opacity separators
213 coats, 215 chromatic photoresists
217 black matrix"s, 219 transparent substrates
23 organic electroluminescence assemblies, 231 lower electrodes
233 organic luminous layers, 235 counter electrodes
31 hydrofuge passages, 311 exposed printing opacity separators
Embodiment
At first, see also the generalized section of Fig. 2 for a preferred embodiment of the present invention; As shown in the figure, the present invention can improve the Organnic electroluminescent device 20 in useful life, mainly is provided with at least one organic electroluminescence assembly 23 in a colored filter 21 (ColorFilter) top.Wherein, the structure of this colored filter 21 is provided with at least one black matrix" 217 (Black Matrix) in a transparent substrates 219 upper surfaces, and be provided with at least one chromatic photoresist 215 in transparent substrates 219 upper surfaces that are not provided with black matrix" 217, to reach the purpose of photochromic conversion.Again, be provided with a coat 213 (over coat) and a printing opacity separator 211 in regular turn in black matrix" 217 and chromatic photoresist 215 tops, for example silicon dioxide layer, silicon nitride layer or silicon oxynitrides, the setting by coat 213 and printing opacity separator 211 can reach colored filter 21 coatingizations and reduce the purpose that is present in aqueous vapors in the colored filter 21 or work solvent effect organic electroluminescence assembly 23.
And organic electroluminescence assembly 23 is with the material of a printing opacity conductive material as lower electrode 231, ITO (tin indium oxide) etc. for example, and with the material of the lower metal of a work function as counter electrode 235, for example, magnesium, calcium, aluminium, lithium etc.Again, the organic luminous layer 233 of growing up between counter electrode 235 and lower electrode 231 can reach the luminous purpose of this organic electroluminescence assembly 23 after 231/235 energising of two electrodes.Wherein, this lower electrode 231 is fixedly arranged on the part upper surface of printing opacity separator 211, and cutter is provided with a hydrofuge passage 31 in the part printing opacity separator 211 of lower electrode 231 and be not coated with, to help the carrying out of colored filter 21 draining processing.
Moreover, please consult Fig. 3 A, Fig. 3 B, Fig. 3 C and Fig. 4 simultaneously and be respectively structure sectional view and the manufacturing flow chart of the above embodiment of the present invention in each making step; As shown in the figure, the main manufacturing process of this Organnic electroluminescent device 20 is as follows: at first, the printing opacity separator 211 of colored filter 21 is cleaned up, clean the flow process of silicon in clean method such as the general technology, as step 410 and Fig. 3 A.After 211 cleanings of printing opacity separator finish, with the printing opacity separator 211 surface definition of cleaning and be formed with at least one lower electrode 231, printing opacity separator 211 parts that covered by lower electrode 231 then can not define naturally becomes an exposed printing opacity separator 311, as step 420 and Fig. 3 B.
After the step that bottom electrode 231 forms is finished, the exposed printing opacity separator 311 that is not coated with lower electrode 231 is removed or etching program continuing.For example, can remove mode to select different etchings according to the difference of printing opacity separator 211 materials, if printing opacity separator 211 is made by silicon dioxide, can select to carry out the etching of silicon dioxide in the mode of wet type or dry-etching, carry out etching if select the mode of Wet-type etching, then the etching solution of Shi Yonging can be B.O.E (NH4F (40%): HF (49%)=6: 1), HF (hydrofluoric acid), BHF or KOH (potassium hydroxide) etc., reaching purpose, and will expose printing opacity separator 311 and be removed SiO 2 etch.In addition, if printing opacity separator 211 is made by silicon nitride or silicon oxynitrides, then this etching step can be selected to carry out in the mode of dry-etching, same removable exposed printing opacity separator 311, and become one naturally except that wet channel 31, as step 430 and Fig. 3 C.
Because, among the above-mentioned steps with above be not coated with lower electrode 231 exposed printing opacity separator 311 remove, and form a hydrofuge passage 31, by the carrying out that will help colored filter 21 draining processing that be provided with of this hydrofuge passage 31, and reach the purpose that reduces colored filter 21 inner aqueous vapors or work dissolvent residual.The method of this draining processing can select to carry out with high temperature furnace the bake process of colored filter 21, or reach the purpose of colored filter 21 inner aqueous vapors or solvent removal in the illumination mode, and, when carrying out the draining processing of colored filter 21 in the mode of baking or illumination, can under the environment of a vacuum, carry out, thus, not only can be really with contained aqueous vapor or the removal of solvents in colored filter 21 inside, also can effectively improve the efficient of draining processing, to save time and the cost that the draining processing is spent, as step 440.
After the vacuum bakeout step of colored filter 21 is finished, can proceed the follow-up making of Organnic electroluminescent device 20, for example, grow up successively in the surface of lower electrode 231 organic luminous layer 233 and a subtend electrode 235, finished the making of organic electroluminescence assembly 23, as step 450 and Fig. 2.
Because, the present invention is before Organnic electroluminescent device 20 carries out follow-up making, the aqueous vapor or the solvent of colored filter 21 inside are fully removed, can effectively reduce the possibility that organic electroluminescence assembly 23 or organic luminous layer 233 and aqueous vapor are had an effect, reduce organic luminous layer 233 degradation speed and improve the Organnic electroluminescent device purpose in 20 useful lifes to reach, as step 47.
In the above embodiment of the present invention, with the explanation of colored filter 21 as inventive embodiments, but in different embodiment, this colored filter 21 also may be selected to be a photochromic switching film (CCM:ColorChange Media), can reach aqueous vapor or removal of solvents equally, and improve the Organnic electroluminescent device purpose in 20 useful lifes photochromic switching film inside.
In sum, when knowing the present invention relevant for a kind of Organnic electroluminescent device, particularly a kind of Organnic electroluminescent device that improves useful life and preparation method thereof.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (8)
1, a kind of Organnic electroluminescent device that improves useful life is characterized in that, main structure comprises:
One colored filter, include a transparent substrates, upper surface in transparent substrates is provided with a chromatic photoresist and a coat in regular turn, and the upper surface of this coat then is respectively equipped with at least one printing opacity separator and at least one hydrofuge channel, and the hydrofuge channel is close to this printing opacity separator and is provided with; And
One organic electroluminescence assembly includes a bottom electrode, is fixedly arranged on the upper surface of this printing opacity separator, and is provided with an organic luminous layer and a subtend electrode in regular turn in the part upper surface of this lower electrode.
2, Organnic electroluminescent device according to claim 1 is characterized in that, this printing opacity separator may be selected to be one of them of a silicon dioxide layer, a silicon nitride layer and a silicon oxynitrides.
3, Organnic electroluminescent device according to claim 1 is characterized in that, this colored filter also can be a photochromic switching film.
4, a kind of manufacture method that improves the Organnic electroluminescent device in useful life is characterized in that, mainly includes the following step:
Definition also forms at least once portion's electrode in the part upper surface of the printing opacity separator of a colored filter, and the part printing opacity separator that will do not covered by lower electrode defines naturally and becomes one and expose the printing opacity separator;
Remove this exposed printing opacity separator, to form a hydrofuge passage;
This colored filter is carried out a draining processing, the aqueous vapor that is present in this colored filter is got rid of by this hydrofuge passage; And
Upper surface in lower electrode is formed with an organic luminous layer and a subtend electrode in regular turn.
5, manufacture method according to claim 4 is characterized in that, this draining treatment step is chosen as one of them of a roasting mode and an illumination mode.
6, manufacture method according to claim 5 is characterized in that, this drainingization is handled under a vacuum environment and carried out.
7, manufacture method according to claim 4 is characterized in that, this printing opacity separator may be selected to be one of them of a silicon dioxide layer, a silicon nitride layer and a silicon oxynitrides.
8, manufacture method according to claim 4 is characterized in that, this colored filter also can be a photochromic switching film.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510063360 CN1665363A (en) | 2005-04-08 | 2005-04-08 | An organic electroluminescent device with improved working life and manufacturing method thereof |
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| CN 200510063360 CN1665363A (en) | 2005-04-08 | 2005-04-08 | An organic electroluminescent device with improved working life and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10048427B2 (en) | 2012-12-27 | 2018-08-14 | Joled Inc. | Display device, method of manufacturing display device, and electronic apparatus |
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2005
- 2005-04-08 CN CN 200510063360 patent/CN1665363A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10048427B2 (en) | 2012-12-27 | 2018-08-14 | Joled Inc. | Display device, method of manufacturing display device, and electronic apparatus |
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