CN103811669A - Organic light emitting device, organic light emitting diode display apparatus and method of manufacturing the same - Google Patents
Organic light emitting device, organic light emitting diode display apparatus and method of manufacturing the same Download PDFInfo
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- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
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Abstract
The invention discloses an organic light-emitting device, an organic light-emitting diode display device and a manufacturing method, and relates to the field of semiconductor manufacturing. The organic light emitting diode display device includes a substrate, a plurality of pixel units formed on the substrate, each of the pixel units including: a reflective electrode formed on the substrate; a planarized first conductive layer formed on the reflective electrode; an organic light emitting layer formed on the planarized first conductive layer; and a second conductive layer formed on the organic light emitting layer; wherein the reflective electrode is patterned such that a distance from a surface thereof to the second conductive layer gradually increases from a middle portion to an edge portion of the reflective electrode; the first conducting layer is a transparent conducting layer, the second conducting layer is a semitransparent conducting layer, and the pixel units correspond to the reflecting electrodes one to one. The invention improves the brightness of the large observation angle position and reduces the spectrum blue shift of the large observation angle position.
Description
Technical field
The present invention relates to optoelectronic semiconductor and manufacture field, relate in particular to a kind of organic luminescent device, organic LED display device and manufacture method.
Background technology
Organic luminescent device (OLED), because its voltage requirements is low and it is high to economize electrical efficiency, adds fast, lightweight, the thin thickness of reaction, simple structure, and the feature such as cost is low obtains extensive use in illumination and demonstration field.
Active driving organic luminescent device (AMOLED) is that each pixel is equipped with the polycrystalline SiTFT (P-Si TFT) with switching function, and a charge storage capacitance of each pixel outfit, drives organic luminescent device to carry out luminous.Because active driving organic luminescent device belongs to static drive mode, there is storage effect, can carry out 100% load driving, this driving is not subject to the restriction of scan electrode number, can independently carry out selective control to each pixel, therefore, active driving organic luminescent device is easy to realize high-resolution and color, is organic light-emitting device important development direction.
At present, increasing active driving organic luminescent device adopts emission structure at top, and this structure has the superior functions such as colorimetric purity is better, aperture opening ratio is higher, the life-span is longer.Fig. 1 is that active driving organic light-emitting device structural representation is launched on existing top.As shown in Figure 1, the top active driving organic luminescent device of transmitting comprises glass substrate 11, be formed on the polycrystalline SiTFT 12 in glass substrate, cover the planarization layer 13 of described polycrystalline SiTFT 12, be formed on the reflection anode 14 being connected with described polycrystalline SiTFT 12 on planarization layer 13 and through described planarization layer 13, be formed on the luminescent layer 15 in reflection anode 14, be formed on the semitransparent conductive layer 16 on luminescent layer, be formed on the resilient coating 17 in semitransparent conductive layer 16 and be formed on the packaged glass layer 18 on resilient coating.Luminescent layer 15 is in the time of stimulated luminescence, and a part of light directly penetrates semitransparent conductive layer 16 from top-emission, and a part of light is transmitted into after the reflection anode of bottom, thereby is upwards reflected and penetrate semitransparent conductive layer 16 from top-emission.Certainly, when light arrives the semitransparent conductive layer at top, part light can be reflected, and thus, in fact the semitransparent conductive layer at top and the reflection anode of bottom form a light part reflection micro-cavity structure.
But, launch in active driving OLED structure on existing top, because light is in the transmission mode difference of device inside, its spectrum is very narrow, and along with view angle increases, brightness diminishes gradually, spectrum engenders blue shift.
Summary of the invention
Technical problem to be solved by this invention is to propose a kind of organic luminescent device, organic LED display device and manufacture method, make described organic luminescent device and organic LED display device there is wider visual angle, overcome along with view angle increases, brightness diminishes gradually, and spectrum engenders the defect of blue shift.
The invention discloses a kind of organic luminescent device, it is characterized in that, described organic luminescent device comprises: substrate; Be formed on the reflecting electrode on substrate; Be formed on the first conductive layer of the planarization on reflecting electrode; Be formed on the organic luminous layer on the first conductive layer of described planarization; And be formed on the second conductive layer on organic luminous layer;
Described reflecting electrode quilt is graphically to make its surface be increased gradually to marginal portion by the mid portion of described reflecting electrode to the distance of described the second conductive layer;
Wherein, described the first conductive layer is transparency conducting layer, and described the second conductive layer is semitransparent conductive layer, and described reflecting electrode is corresponding one by one with described organic luminescent device.
Preferably, described reflecting electrode is by graphically to make cross section as triangle, trapezoidal, arc, stairstepping or its combination.
Preferably, described substrate comprises patterned organic material layer, and described reflecting electrode is the metal level that is formed on described patterned organic material layer surface.
Preferably, described organic luminous layer comprises hole injection layer, hole transmission layer, light-emitting layer, electron transfer layer and the electron injecting layer of sequence stack on the first conductive layer, the first conductive layer of described planarization is anode electrode, and described the second conductive layer is cathode electrode.
Preferably, the material of the first conductive layer of described planarization is ITO, IZO, ZnO or its combination, and the material of described the second conductive layer is Ag, Mg or its combination.
Preferably, described organic luminous layer comprises electron injecting layer, electron transfer layer, light-emitting layer, hole transmission layer and the hole injection layer of sequence stack on the first conductive layer, the first conductive layer of described planarization is cathode electrode, and described the second conductive layer is anode electrode.
Preferably, the material of the first conductive layer of described planarization is Ag, Mg or its combination, and the material of described the second conductive layer is Ag, Mg or its combination.
Preferably, the material of described reflecting electrode is Ag, Al or its combination.
The invention also discloses a kind of organic LED display device, comprise substrate, be formed on the multiple pixel cells on described substrate, each described pixel cell comprises: be formed on the reflecting electrode on described substrate; Be formed on the first conductive layer of the planarization on reflecting electrode; Be formed on the organic luminous layer on the first conductive layer of described planarization; And be formed on the second conductive layer on described organic luminous layer;
Wherein, described reflecting electrode quilt is graphically to make its surface be increased gradually to marginal portion by the mid portion of described reflecting electrode to the distance of described the second conductive layer.
Wherein, described the first conductive layer is transparency conducting layer, and described the second conductive layer is semitransparent conductive layer, and described pixel cell is corresponding one by one with described reflecting electrode.
Preferably, described substrate comprises substrate, is formed at the multi-strip scanning line on described substrate, and with described scan line many data wires that intersect that insulate, described pixel cell is formed in the pixel region that adjacent scanning lines and adjacent data line enclose.
Preferably, described organic LED display device also comprises the drive circuit being formed in described pixel region, to drive the organic luminous layer in described pixel cell luminous.
Preferably, described reflecting electrode is by graphically to make cross section a kind of or its combination in triangle, trapezoidal, arc, stairstepping.
Preferably, described substrate comprises patterned organic material layer, and described reflecting electrode is the metal level that is formed on described patterned organic material layer surface.
Preferably, described organic luminous layer comprises hole injection layer, hole transmission layer, light-emitting layer, electron transfer layer and the electron injecting layer of sequence stack on the first conductive layer, and described the first conductive layer is anode electrode, and described the second conductive layer is cathode electrode.
Preferably, the material of described the first conductive layer is ITO, IZO, ZnO or its combination, and the material of described the second conductive layer is Ag, Mg or its combination.
Preferably, described organic luminous layer comprises electron injecting layer, electron transfer layer, light-emitting layer, hole transmission layer and the hole injection layer of sequence stack on the first conductive layer, and described the first conductive layer is cathode electrode, and described the second conductive layer is anode electrode.
Preferably, the material of described the first conductive layer is Ag, Mg or its combination, and the material of described the second conductive layer is Ag, Mg or its combination.
Preferably, the material of described reflecting electrode is Ag, Al or its combination.
The manufacture method that the invention also discloses a kind of organic LED display device, is characterized in that:
One substrate is provided, described substrate comprises substrate, be formed at the multi-strip scanning line on described substrate, with described scan line many data wires that intersect that insulate, be formed at the LED driving circuit in the pixel region that adjacent scanning lines and adjacent data line enclose, cover the organic layer of described substrate surface;
Graphical described organic layer, makes described patterned organic layer surface in pixel region be reduced gradually to marginal portion by the mid portion of described organic layer to the distance of described substrate;
Form the reflecting electrode of patterning on described patterned organic layer surface;
On described reflecting electrode, form the first conductive layer of patterning and planarization;
On described the first conductive layer, form the organic luminous layer of patterning;
On described organic luminous layer, form the second conductive layer;
Wherein, described the first conductive layer is transparency conducting layer, and described the second conductive layer is semitransparent conductive layer, and described pixel cell is corresponding one by one with described reflecting electrode.
Preferably, to be formed cross section be triangle, trapezoidal, arc, stairstepping or its combination to described patterned organic layer.
Preferably, the step of patterned described organic layer comprises:
Thereby remove part organic layer by photoetching and limit the region that will form reflecting electrode;
The described region that will form reflecting electrode after photoetching is carried out graphically, forming patterned organic layer.
Preferably, described the described region that will form reflecting electrode after photoetching is carried out graphically, the step that forms patterned organic layer comprises:
Organic layer after photoetching is toasted to 1-2 hour under 200-300 degrees celsius.
Preferably, the described step that forms organic luminous layer on the first conductive layer of described planarization comprises:
Sequence stack hole injection layer, hole transmission layer, light-emitting layer, electron transfer layer and electron injecting layer on the first conductive layer.
Preferably, the described step that forms organic luminous layer on the first conductive layer of described planarization comprises:
Sequence stack electron injecting layer, electron transfer layer, light-emitting layer, hole transmission layer and hole injection layer on the first conductive layer.
The present invention is by graphical reflecting electrode, make reflecting electrode be formed as the shape of projection in whole luminous open area, change organic light-emitting device micro-cavity structure, make to there is larger visual angle via the light of this device transmitting, improve the brightness of large view angle position, reduced the spectrum blue shift of large view angle position.
Accompanying drawing explanation
Fig. 1 is that active driving organic light-emitting device structural representation is launched on existing top;
Fig. 2 is that active driving organic luminescent device microcavity principle schematic is launched on existing top;
Fig. 3 is that active driving organic luminescent device microcavity principle schematic is launched on top of the present invention;
Fig. 4 is the organic light-emitting device structural representation that first embodiment of the invention provides;
Fig. 5 is the organic light-emitting device structural representation that second embodiment of the invention provides;
Fig. 6 is the organic light-emitting device structural representation that third embodiment of the invention provides;
Fig. 7 is the organic light-emitting device structural representation that fourth embodiment of the invention provides;
Fig. 8 is the cross section structure schematic diagram of the organic LED display device that provides of fifth embodiment of the invention;
Fig. 9 is the top surface structure schematic diagram of the organic LED display device that provides of fifth embodiment of the invention;
Figure 10 is the flow chart of the manufacture method of the organic LED display device that provides of sixth embodiment of the invention;
Figure 11 a-d is the sectional view of the organic LED display device in manufacture process corresponding to the manufacture method that provides of sixth embodiment of the invention.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with accompanying drawing and by embodiment.
Fig. 2 is that active driving organic luminescent device microcavity principle schematic is launched on existing top.As shown in Figure 2, in the microcavity becoming with lower surface X-shaped at upper surface S, incide the some C of upper surface with angle θ from the light of light launch point G transmitting, upper surface S is penetrated in part anaclasis, and after part light reflexes to the some F of lower surface and again reflexes to the some D of upper surface, refraction is penetrated.In such microcavity, in fact visual angle is exactly the refraction angle of light, and in fact it be directly proportional to incidence angle θ.And, the optical length of incidence angle θ and microcavity and optical wavelength, that is, there is following relation in the optical length L ' between upper surface S and lower surface X:
Wherein, optical length L ' equals physical length L and is multiplied by medium refraction index.λ is light wavelength, the mould that m is light, and Φ reflects the phase shift causing for light in upper and lower surface.
There is above-mentioned formula (1) known, in a microcavity optical length L ' timing, because incidence angle θ is directly proportional to visual angle, therefore, and along with visual angle increase, the optical wavelength generation blue shift that can diminish.
Fig. 3 is that active driving organic luminescent device microcavity principle schematic is launched on top of the present invention.Principle of the present invention is that the reflecting surface of the lower surface of microcavity is set to overshooting shape at whole microcavity, that is, lower surface is increased gradually to marginal portion at the mid portion of microcavity to the distance L of described upper surface.Thus, optical length L ' is also rendered as from the mid portion of microcavity and increases gradually to marginal portion, and thus, as shown in Figure 3, first, the lower surface reflection angle arranging like this can be launched certain variation, and its light shooting angle after lower surface reflection is larger.Secondly, according to above-mentioned formula (1) owing to becoming large along with visual angle, it is large that incidence angle θ becomes, thereby cause cos θ to diminish, still, because the optical length L ' of microcavity becomes large greatly along with incidence angle becomes, thereby cos θ is diminished and plays the effect of compensation, even if make to become at visual angle large, incidence angle θ becomes in large situation, and optical wavelength does not still change or intensity of variation diminishes.Thus, the reflecting surface of the lower surface by microcavity is set to overshooting shape at whole microcavity and can realizes the brightness that has improved large view angle position, has reduced the spectrum blue shift of position, large flash ranging angle.
Fig. 4 is the organic light-emitting device structural representation that first embodiment of the invention provides.As shown in Figure 4, the organic luminescent device 40 of the present embodiment, comprising: substrate 41; Be formed on the reflecting electrode 42 on substrate 41; Be formed on the first conductive layer 43 of the planarization on reflecting electrode; Be formed on the organic luminous layer 44 on the first conductive layer of described planarization; And be formed on the second conductive layer 45 on organic luminous layer.
Reflecting electrode 42 quilts are graphically to make its surface be increased gradually to marginal portion by the mid portion of described reflecting electrode 42 to the distance of described the second conductive layer 45.
Wherein, described the first conductive layer 43 is transparency conducting layer, and described the second conductive layer 45 is semitransparent conductive layer, and described reflecting electrode is corresponding one by one with described organic luminescent device.Here said correspondence one by one refers in an organic luminescent device reflecting electrode is only set; A reflecting electrode is only arranged in an organic luminescent device.
According to above-mentioned for rationale, it will be appreciated by those skilled in the art that, although Fig. 4 is the arc that described reflecting electrode 42 cross sections is formed as to projection, meet other shape that its surface is increased to marginal portion by the mid portion of described reflecting electrode gradually to the distance of described the second conductive layer, for example, triangle, trapezoidal, arc, stairstepping or its combination, also all can realize same or similar effect.
The present embodiment is by graphical reflecting electrode, make reflecting electrode be formed as the shape of projection in whole luminous open area, change organic light-emitting device micro-cavity structure, make to there is larger visual angle via the light of this device transmitting, improve the brightness of large view angle position, reduced the spectrum blue shift of large view angle position.
Fig. 5 is the organic light-emitting device structural representation that second embodiment of the invention provides.As shown in Figure 5, the organic luminescent device 50 of the present embodiment comprises: substrate 51; Be formed on the reflecting electrode 52 on substrate 51; Be formed on the first conductive layer 53 of the planarization on reflecting electrode; Be formed on the organic luminous layer 54 on the first conductive layer of described planarization; And be formed on the second conductive layer 55 on organic luminous layer.
Reflecting electrode 52 quilts are graphically to make its surface be increased gradually to marginal portion by the mid portion of described reflecting electrode 52 to the distance of described the second conductive layer 55.
Wherein, described the first conductive layer 53 is transparency conducting layer, and described the second conductive layer 55 is semitransparent conductive layer, and described reflecting electrode is corresponding one by one with described organic luminescent device.
Wherein, substrate 51 comprises glass substrate 511 and is formed on the patterned organic material layer 512 in glass substrate.Organic material layer is patterned into needed shape for lugs, meets the shape that it is increased to marginal portion by mid portion to the distance of described the second conductive layer 53 gradually for surface.
Reflecting electrode 52 is the metal level that covers the uniform thickness on described patterned organic material layer 512 surfaces, and thus, reflecting electrode 52 has the surface configuration identical with patterned organic material layer.
According to above-mentioned for rationale, it will be appreciated by those skilled in the art that, although Fig. 5 is the arc that described reflecting electrode cross section is formed as to projection, but, meet other shape that its surface is increased to marginal portion by the mid portion of described reflecting electrode gradually to the distance of described the second conductive layer, for example, triangle, trapezoidal, arc, stairstepping or its combination, also all can realize same or similar effect.
The present embodiment passes through graphical the organic material layer of substrate, thereby for patterned reflecting electrode provides carrier, the metal level that only need to form uniform thickness on patterned organic material layer can obtain patterned reflecting electrode, thereby simplify the graphical technique of reflecting electrode, made reflecting electrode prepare difficulty and reduce.
Fig. 6 is the organic light-emitting device structural representation that third embodiment of the invention provides.As shown in Figure 6, the organic luminescent device 60 of the present embodiment comprises: substrate 61; Be formed on the reflecting electrode 62 on substrate 61; Be formed on the first conductive layer 63 of the planarization on reflecting electrode; Be formed on the organic luminous layer 64 on the first conductive layer of described planarization; And be formed on the second conductive layer 65 on organic luminous layer.
Reflecting electrode 62 quilts are graphically to make its surface be increased gradually to marginal portion by the mid portion of described reflecting electrode 62 to the distance of described the second conductive layer 65.Be depicted as in the drawings circular arc.
Wherein, described the first conductive layer 63 is transparency conducting layer, and described the second conductive layer 65 is semitransparent conductive layer, and described reflecting electrode is corresponding one by one with described organic luminescent device.
Thus, reflecting electrode 62 is formed as micro-cavity structure with translucent the second conductive layer 65, has centre elongated gradually to edge, thereby can compensate the blue-shifted phenomenon that visual angle change causes because the shape of reflecting electrode 62 makes the optical length of described micro-cavity structure.
In the present embodiment, organic luminous layer 64 comprises by being sequentially stacked in hole injection layer 641, hole transmission layer 642, light-emitting layer 643, electron transfer layer 644 and the electron injecting layer 645 on the first conductive layer 63 on lower.Now, the first conductive layer 63 contacts with hole injection layer 641 as anode, and the second conductive layer is formed on electron injecting layer 645 as negative electrode.
In a preferred embodiment of the present invention, adopt indium tin metal oxide (ITO), indium zinc metal oxide (IZO), zinc oxide (ZnO) or its to be combined to form the first transparent conductive layer 63 as anode, adopt Ag, Mg or its to be combined to form translucent the second conductive layer 65 as negative electrode.
It will be appreciated by those skilled in the art that, be only a preferred implementation of embodiments of the invention for the explanation of above-mentioned material, can be implemented as transparency conducting layer and semitransparent conductive layer and meet work function require other material also can be for the manufacture of described the first conductive layer 63 and the second conductive layer 65.
In a preferred embodiment of the present invention, reflecting electrode 62 adopts Ag, Al or its to be combined to form.
The present embodiment by using the first conductive layer as anode, the second conductive layer is as negative electrode, and correspondence arranges organic luminous layer, and a kind of optional wide viewing angle organic light-emitting device design alternative is provided.
Fig. 7 is the organic light-emitting device structural representation that fourth embodiment of the invention provides.As shown in Figure 7, the organic luminescent device 70 of the present embodiment comprises: substrate 71; Be formed on the reflecting electrode 72 on substrate 71; Be formed on the first conductive layer 73 of the planarization on reflecting electrode; Be formed on the organic luminous layer 74 on the first conductive layer of described planarization; And be formed on the second conductive layer 75 on organic luminous layer.
Reflecting electrode 72 quilts are graphically to make its surface be increased gradually to marginal portion by the mid portion of described reflecting electrode 72 to the distance of described the second conductive layer 75.Be depicted as in the drawings circular arc.
Wherein, described the first conductive layer 73 is transparency conducting layer, and described the second conductive layer 75 is semitransparent conductive layer, and described reflecting electrode is corresponding one by one with described organic luminescent device.
Thus, reflecting electrode 72 is formed as micro-cavity structure with translucent the second conductive layer 75, because the shape of reflecting electrode 62 makes the optical length of described micro-cavity structure elongated gradually to edge by centre, thereby can compensate the blue-shifted phenomenon that visual angle change causes.
In the present embodiment, organic luminous layer 74 comprises by being sequentially stacked in electron injecting layer 741, electron transfer layer 742, light-emitting layer 743, hole transmission layer 744 and the hole injection layer 745 on the first conductive layer 73 on lower, now, the first conductive layer 73 contacts with hole injection layer 741 as negative electrode, the second conductive layer as anodic formation on electron injecting layer 745.
In a preferred embodiment of the present invention, adopt Ag, the Mg of 10-20nm thickness or the metal level of its composition to serve as negative electrode as the first transparent conductive layer 73, adopt Ag, Mg that thickness is larger or its to be combined to form translucent the second conductive layer 75 as anode.
It will be appreciated by those skilled in the art that, be only a preferred implementation of embodiments of the invention for the explanation of above-mentioned material, can be implemented as transparency conducting layer and semitransparent conductive layer and meet work function require other material also can be for the manufacture of described the first conductive layer 73 and the second conductive layer 75.
In a preferred embodiment of the present invention, reflecting electrode 72 adopts Ag, Al or its to be combined to form.
The present embodiment be by adopting the inverted structure that is comparatively of little use, utilize the first conductive layer as negative electrode, the second conductive layer as anode, and the corresponding stacking order that organic luminous layer is set, provides a kind of optional wide viewing angle organic light-emitting device design alternative.
Fig. 8 is the cross section structure schematic diagram of the organic LED display device that provides of fifth embodiment of the invention.Fig. 9 is the top surface structure schematic diagram of the organic LED display device that provides of fifth embodiment of the invention.As shown in Figure 8 and Figure 9, the organic LED display device 80 of the present embodiment, comprise substrate 81, described substrate comprises substrate 811, be formed at the multi-strip scanning line 812 on described substrate, with described scan line many data wires 813 that intersect that insulate, adjacent scan line 812 and adjacent data line 813 are around forming a pixel region.
In described pixel region on substrate 81, be formed with multiple pixel cells 82.Pixel cell 82 can be by forming as any one organic luminescent device in the above-mentioned first to the 5th embodiment.
The common ground of all pixel cells 82 is, it comprises and pixel cell reflecting electrode 821 and be formed on the first conductive layer 822, organic luminous layer 823 and second conductive layer 824 of the planarization on reflecting electrode 821 one to one, wherein, reflecting electrode 821 quilts are graphically to make its surface be increased gradually to marginal portion by the mid portion of described reflecting electrode 821 to the distance of described the second conductive layer 822.Described reflecting electrode 821, can Formation cross-section be the circular shape shown in Fig. 8, and the cross section that also can be formed as meeting above-mentioned condition is other shape of triangle, trapezoidal, arc, stairstepping or its combination.Here said correspondence one by one refers in a pixel cell reflecting electrode is only set; A reflecting electrode is only arranged in a pixel cell.
Meanwhile, organic LED display device 80 also comprises the drive circuit 83 being formed in pixel region, to drive the organic luminous layer in described pixel cell luminous.
In a preferred embodiment of the present invention, described drive circuit 83 is polycrystalline SiTFT drive circuit, thus, makes organic LED display device 80 be formed as active driving organic LED display device.
The present embodiment is by by the most basic pixel cell of organic light-emitting device structure with wide viewing angle of the present invention, on unified substrate, be formed as comprising the organic LED display device of multiple pixel cells, acquisition possesses the organic LED display device of wide viewing angle characteristic, has overcome display unit along with visual angle change brightness reduces and occur the defect of spectrum blue shift.
Figure 10 is the flow chart of the manufacture method of the organic LED display device that provides of sixth embodiment of the invention.As shown in figure 10, described method comprises:
In a preferred embodiment of the present invention, described organic layer is the planarization layer that substrate surface is carried out to planarization, the refined ammonia of polyamides that its preferred material is toray company, the material such as acrylic of Japanese JSR company.
Figure 11 a shows the sectional view of the organic LED display device in the corresponding manufacture process of step 1010.As shown in Figure 11 a, comprise that for the manufacture of the substrate 111 of organic LED display device 110 substrate 111a, scan line 111b, data wire 111c(are not shown) and drive circuit 111d and organic layer 111e.
Wherein, it is circular shape that patterned layer can be formed as cross section, and the cross section that also can be formed as meeting above-mentioned condition is other shape of triangle, trapezoidal, arc, stairstepping or its combination.
In a preferred embodiment of the present invention, the step of patterned described organic layer comprises:
Thereby step 1021, remove part organic layer by photoetching and limit the region that will form reflecting electrode.
Figure 11 b is the sectional view of the organic LED display device in the corresponding manufacture process of step 1012.As shown in Figure 11 b, organic layer 111e is removed a part and forms groove 112 to limit the region that forms reflecting electrode.
Step 1022, the described region that will form reflecting electrode after photoetching is carried out graphically, forming patterned organic layer.
Preferably, it is circular-arc can under 200-300 degrees celsius, toasting by the organic layer to after photoetching and described organic layer was formed as to cross section in 1-2 hour, realizes that it is graphical.
Figure 11 c is the sectional view of the organic LED display device in the corresponding manufacture process of step 1022.As shown in Figure 11 c, through overbaking, it is circular arc that described organic layer projection is formed as cross section.
In a preferred embodiment of the present invention, form the metal level of uniform thickness on patterned organic layer surface, can obtain patterned reflecting electrode.Its schematic diagram is as shown in Figure 11 d, and patterned reflecting electrode is the metal level 113 that covers organic layer surface, and it preferably selects Ag, Al or its composition is that material forms.
Wherein, described the first conductive layer is transparency conducting layer, and described the second conductive layer is semitransparent conductive layer, and described pixel cell is corresponding one by one with described reflecting electrode.
In a preferred embodiment of the present invention, step 1040 utilizes indium tin metal oxide (ITO), indium zinc metal oxide (IZO), zinc oxide (ZnO) or its to be combined to form the first transparent conductive layer 63 as anode, and step 1060 utilizes Ag, Mg or its to be combined to form translucent the second conductive layer 65 as negative electrode.And corresponding, step 1050 is sequence stack hole injection layer, hole transmission layer, light-emitting layer, electron transfer layer and electron injecting layer on the first conductive layer.
In another preferred embodiment of the present invention, step 1040 utilization forms Ag, the Mg of 10-20nm thickness or the metal level of its composition serves as negative electrode as the first transparent conductive layer 73.Step 1060 adopts Ag, Mg that thickness is larger or its to be combined to form translucent the second conductive layer 75 as anode.And accordingly, step 1050 is sequence stack electron injecting layer, electron transfer layer, light-emitting layer, hole transmission layer and hole injection layer on the first conductive layer.
It will be appreciated by those skilled in the art that, be only a preferred implementation of embodiments of the invention for the explanation of above-mentioned material, can be implemented as transparency conducting layer and semitransparent conductive layer and meet work function require other material also can be for the manufacture of described the first conductive layer and the second conductive layer.
The present embodiment passes through graphical the organic material layer of substrate, thereby for patterned reflecting electrode provides carrier, the metal level that only need to form uniform thickness on patterned organic material layer can obtain patterned reflecting electrode, thereby simplify the graphical technique of reflecting electrode, made reflecting electrode prepare difficulty and reduce.Meanwhile, it is preferred embodiment multiple that the present embodiment provides, and the multiple choices of manufacturing wide viewing angle organic LED display device are provided.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, to those skilled in the art, the present invention can have various changes and variation.All any modifications of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included within spirit of the present invention and principle.
Claims (24)
1. an organic luminescent device, is characterized in that, described organic luminescent device comprises: substrate; Be formed on the reflecting electrode on substrate; Be formed on the first conductive layer of the planarization on reflecting electrode; Be formed on the organic luminous layer on the first conductive layer of described planarization; And be formed on the second conductive layer on organic luminous layer;
Described reflecting electrode quilt is graphically to make its surface be increased gradually to marginal portion by the mid portion of described reflecting electrode to the distance of described the second conductive layer;
Wherein, described the first conductive layer is transparency conducting layer, and described the second conductive layer is semitransparent conductive layer, and described reflecting electrode is corresponding one by one with described organic luminescent device.
2. organic luminescent device according to claim 1, is characterized in that, described reflecting electrode is by graphically to make cross section as triangle, trapezoidal, arc, stairstepping or its combination.
3. organic luminescent device according to claim 1, is characterized in that, described substrate comprises patterned organic material layer, and described reflecting electrode is the metal level that is formed on described patterned organic material layer surface.
4. organic luminescent device according to claim 1, it is characterized in that, described organic luminous layer comprises hole injection layer, hole transmission layer, light-emitting layer, electron transfer layer and the electron injecting layer of sequence stack on the first conductive layer, the first conductive layer of described planarization is anode electrode, and described the second conductive layer is cathode electrode.
5. organic luminescent device according to claim 4, is characterized in that, the material of the first conductive layer of described planarization is ITO, IZO, ZnO or its combination, and the material of described the second conductive layer is Ag, Mg or its combination.
6. organic luminescent device according to claim 1, it is characterized in that, described organic luminous layer comprises electron injecting layer, electron transfer layer, light-emitting layer, hole transmission layer and the hole injection layer of sequence stack on the first conductive layer, the first conductive layer of described planarization is cathode electrode, and described the second conductive layer is anode electrode.
7. organic luminescent device according to claim 6, is characterized in that, the material of the first conductive layer of described planarization is Ag, Mg or its combination, and the material of described the second conductive layer is Ag, Mg or its combination.
8. organic luminescent device according to claim 1 has, and it is characterized in that, the material of described reflecting electrode is Ag, Al or its combination.
9. an organic LED display device, comprises substrate, is formed on the multiple pixel cells on described substrate, and each described pixel cell comprises: be formed on the reflecting electrode on described substrate; Be formed on the first conductive layer of the planarization on reflecting electrode; Be formed on the organic luminous layer on the first conductive layer of described planarization; And be formed on the second conductive layer on described organic luminous layer;
Wherein, described reflecting electrode quilt is graphically to make its surface be increased gradually to marginal portion by the mid portion of described reflecting electrode to the distance of described the second conductive layer.
Wherein, described the first conductive layer is transparency conducting layer, and described the second conductive layer is semitransparent conductive layer, and described pixel cell is corresponding one by one with described reflecting electrode.
10. organic LED display device according to claim 9, it is characterized in that, described substrate comprises substrate, be formed at the multi-strip scanning line on described substrate, with described scan line many data wires that intersect that insulate, described pixel cell is formed in the pixel region that adjacent scanning lines and adjacent data line enclose.
11. organic LED display devices according to claim 10, is characterized in that, described organic LED display device also comprises the drive circuit being formed in described pixel region, to drive the organic luminous layer in described pixel cell luminous.
12. organic LED display devices according to claim 9, is characterized in that, described reflecting electrode is by graphically to make cross section a kind of or its combination in triangle, trapezoidal, arc, stairstepping.
13. organic LED display devices according to claim 9, is characterized in that, described substrate comprises patterned organic material layer, and described reflecting electrode is the metal level that is formed on described patterned organic material layer surface.
14. organic LED display devices according to claim 9, it is characterized in that, described organic luminous layer comprises hole injection layer, hole transmission layer, light-emitting layer, electron transfer layer and the electron injecting layer of sequence stack on the first conductive layer, described the first conductive layer is anode electrode, and described the second conductive layer is cathode electrode.
15. display unit that comprise multiple pixel cells according to claim 14, is characterized in that, the material of described the first conductive layer is ITO, IZO, ZnO or its combination, and the material of described the second conductive layer is Ag, Mg or its combination.
16. organic LED display devices according to claim 9, it is characterized in that, described organic luminous layer comprises electron injecting layer, electron transfer layer, light-emitting layer, hole transmission layer and the hole injection layer of sequence stack on the first conductive layer, described the first conductive layer is cathode electrode, and described the second conductive layer is anode electrode.
17. organic LED display devices according to claim 16, is characterized in that, the material of the first conductive layer of described planarization is Ag, Mg or its combination, and the material of described the second conductive layer is Ag, Mg or its combination.
18. organic LED display devices according to claim 9, is characterized in that, the material of described reflecting electrode is Ag, Al or its combination.
The manufacture method of 19. 1 kinds of organic LED display devices, is characterized in that:
One substrate is provided, described substrate comprises substrate, be formed at the multi-strip scanning line on described substrate, with described scan line many data wires that intersect that insulate, be formed at the LED driving circuit in the pixel region that adjacent scanning lines and adjacent data line enclose, cover the organic layer of described substrate surface;
Graphical described organic layer, makes described patterned organic layer surface in pixel region be reduced gradually to marginal portion by the mid portion of described organic layer to the distance of described substrate;
Form the reflecting electrode of patterning on described patterned organic layer surface;
On described reflecting electrode, form the first conductive layer of patterning and planarization;
On described the first conductive layer, form the organic luminous layer of patterning;
On described organic luminous layer, form the second conductive layer;
Wherein, described the first conductive layer is transparency conducting layer, and described the second conductive layer is semitransparent conductive layer, and described pixel cell is corresponding one by one with described reflecting electrode.
The manufacture method of 20. organic LED display devices according to claim 19, is characterized in that, it is triangle, trapezoidal, arc, stairstepping or its combination that described patterned organic layer is formed cross section.
The manufacture method of 21. organic LED display devices according to claim 19, is characterized in that, the step of patterned described organic layer comprises:
Thereby remove part organic layer by photoetching and limit the region that will form reflecting electrode;
The described region that will form reflecting electrode after photoetching is carried out graphically, forming patterned organic layer.
The manufacture method of 22. organic LED display devices according to claim 21, is characterized in that, described the described region that will form reflecting electrode after photoetching is carried out graphically, and the step that forms patterned organic layer comprises:
Organic layer after photoetching is toasted to 1-2 hour under 200-300 degrees celsius.
The manufacture method of 23. organic LED display devices according to claim 19, is characterized in that, the described step that forms organic luminous layer on the first conductive layer of described planarization comprises:
Sequence stack hole injection layer, hole transmission layer, light-emitting layer, electron transfer layer and electron injecting layer on the first conductive layer.
The manufacture method of 24. organic light emitting display according to claim 19, is characterized in that, the described step that forms organic luminous layer on the first conductive layer of described planarization comprises:
Sequence stack electron injecting layer, electron transfer layer, light-emitting layer, hole transmission layer and hole injection layer on the first conductive layer.
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