CN104218158A - Organic light-emitting device and manufacturing method of organic light-emitting device - Google Patents
Organic light-emitting device and manufacturing method of organic light-emitting device Download PDFInfo
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H10K50/81—Anodes
- H10K50/816—Multilayers, e.g. transparent multilayers
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- 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. The organic light-emitting device comprises a light-transmitting substrate, a first transparent electrode layer, a reflecting layer, a second transparent electrode layer, an organic light-emitting functional layer, a semitransparent electrode layer and a light compensating layer which are laminated in sequence, wherein the light-transmitting substrate comprises a first light-emitting surface and a covering surface which are arranged oppositely; the first transparent electrode layer covers the covering surface; the reflecting layer covers the surface of the first transparent electrode layer in a scattered manner, thereby forming a light-shielding region; the area ratio of the reflecting layer to the first transparent electrode layer is 20-80 percent; the surface of the reflecting layer not covering the first transparent electrode layer forms a light-transmitting region; the second transparent electrode layer covers the light-shielding region and the light-transmitting region; the organic light-emitting functional layer covers the surface of the second transparent electrode layer; the semitransparent electrode layer covers the surface of the organic light-emitting functional layer; and the light compensating layer only covers the surface of the semitransparent electrode layer corresponding to the light-transmitting region. The two light-emitting surfaces of the organic light-emitting device are uniform and consistent in light-emitting intensity. The invention further discloses a manufacturing method of the organic light-emitting device.
Description
Technical field
The present invention relates to light emitting device field, particularly relate to the preparation method of a kind of organic electroluminescence device and this organic electroluminescence device.
Background technology
Organic electroluminescent (Organic Light Emission Diode, be called for short OLED), there is the characteristics such as brightness is high, material selection range is wide, driving voltage is low, all solidstate active illuminating, have high definition, wide viewing angle simultaneously, and the advantage such as fast response time, be a kind of Display Technique and light source of great potential, meet the development trend of information age mobile communication and information displaying, and the requirement of green lighting technique, be the focal point of current lot of domestic and foreign researcher.
Existing organic electroluminescent technology, the side of light from anode or negative electrode can only be taken out by major part, obtained bottom emitting or top radiation organic EL part.The organic electroluminescence device of the double-side display of some researchers invention, adopt two organic electroluminescence cells to fit together back-to-back, this structure is more complicated, and processing procedure is more.Also there is researcher to adopt transparent anode and negative electrode, obtain the effect of two-sided bright dipping.But the negative electrode usually adopted is sheet metal film, and its transmitance generally can only reach 50-70%.And the anode adopted is transparent oxide film, its transmitance generally can reach more than 80%, and therefore, at the exiting surface place of anode and negative electrode, luminous intensity there are differences, and affects the uniformity of luminance of organic electroluminescence device.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of double-side and the preparation method of two comparatively uniform organic electroluminescence devices of exiting surface luminous intensity and this organic electroluminescence device.
In order to solve the problems of the technologies described above, The embodiment provides a kind of organic electroluminescence device, comprise stack gradually light-transparent substrate, the first transparent electrode layer, reflector, the second transparent electrode layer, organic luminescence function layer, semitransparent electrode layer and light layer of compensation
Described light-transparent substrate comprises the first exiting surface and coverage rate that are oppositely arranged, and described first transparent electrode layer is covered in described coverage rate; The dispersion of described reflector is covered in the formation shading region, surface of described first transparent electrode layer, described reflector is not covered in the formation transparent area, surface of described first transparent electrode layer, and the area ratio of described reflector and described first transparent electrode layer is 20% ~ 80%; Described second transparent electrode layer is covered in described shading region and described transparent area; Described organic luminescence function layer is covered in described second transparent electrode layer surface; Described semitransparent electrode layer is covered in described organic luminescence function layer surface; Described smooth layer of compensation is only covered in described semitransparent electrode layer surface corresponding to described transparent area, described smooth layer of compensation and described reflector shape complementarity, described semitransparent electrode layer and described smooth layer of compensation surface form the second exiting surface, and the material of described smooth layer of compensation is selected from the one in zinc sulphide or zinc selenide.
Wherein, the material of described first transparent electrode layer is one or more in indium tin oxide, indium-zinc oxide, aluminium zinc oxide and gallium zinc oxide, and the thickness of described first transparent electrode layer is 70 ~ 200nm; The material of described second transparent electrode layer is one or more in indium tin oxide, indium-zinc oxide, aluminium zinc oxide and gallium zinc oxide, and the thickness of described second transparent electrode layer is 30 ~ 70nm.
Wherein, the material in described reflector is selected from as the one in silver, aluminium, gold, platinum, nickel, copper or chromium, and the thickness in described reflector is 40 ~ 70nm.
Wherein, described shading region and described transparent area are all in strip, alternately arrange in described shading region and described transparent area.
Wherein, described shading region and described transparent area are square, alternately arrange in described shading region and described transparent area, and fit in the limit of at least two limits of shading region described in each and adjacent described transparent area, at least one angle of shading region described in each and one jiao of shading region described in another abut against.
Wherein, described shading region is square, and multiple described shading region is intervally arranged and does not connect mutually.
Wherein, described organic luminescence function layer comprises hole injection layer, hole transmission layer, luminescent layer, electron transfer layer and electron injecting layer, described hole injection layer is covered in described second transparent electrode layer surface, described hole transmission layer is covered in the surface of hole injection layer, described luminescent layer is covered in the surface of described hole transmission layer, described electron transfer layer is covered in the surface of described luminescent layer, described electron injecting layer is covered in the surface of described electron transfer layer, and described semitransparent electrode layer is covered in the surface of described electron injecting layer.
Wherein, the material of described semitransparent electrode layer is selected from as the one in silver, aluminium, samarium, ytterbium, aerdentalloy, silver-colored magnesium alloy, almag, and the thickness of described semitransparent electrode layer is 18 ~ 35nm.
Wherein, the thickness of described smooth layer of compensation is 40 ~ 80nm, and the area ratio of described smooth layer of compensation and described semitransparent electrode layer is 20% ~ 80%.
The embodiment provides the preparation method of above-mentioned organic electroluminescence device, comprise step as follows:
One light-transparent substrate is provided;
Described light-transparent substrate prepares the first transparent electrode layer by magnetron sputtering method, and sputtering rate is 0.1 ~ 2nm/s;
There is provided the first mask plate, described first mask plate fits in described first transparent electrode layer surface;
Adopt evaporation or magnetron sputtering method, in described first preparation reflector, mask plate surface, preparation speed is 0.1 ~ 2nm/s;
Take off described first mask plate, the dispersion of described reflector is covered in the formation shading region, surface of described first transparent electrode layer, described reflector is not covered in the formation transparent area, surface of described first transparent electrode layer, on described shading region and surface, transparent area, prepare the second transparent electrode layer by magnetron sputtering method, sputtering rate is 0.1 ~ 2nm/s;
Adopt Vacuum Heat coating method, prepare organic luminescence function layer on described second transparent electrode layer surface;
Adopt Vacuum Heat coating method, prepare semitransparent electrode layer on described organic luminescence function layer surface;
There is provided the second mask plate, described second mask plate coordinates with described first mask plate shape complementarity, and described second mask plate fits in described semitransparent electrode layer surface, adopts evaporation or magnetron sputtering method to prepare light layer of compensation;
Take off described second mask plate, prepare described organic electroluminescence device.
In above-mentioned organic electroluminescence device, the shape complementarity in described smooth layer of compensation and described reflector, described smooth layer of compensation to be disappeared effect mutually by light interference, reduce the reflection of emergent ray in described semitransparent electrode layer and Air Interface, increase the transmission of emergent ray at described translucent motor layer and Air Interface place, thus add described organic electroluminescence device on described second exiting surface, the luminous intensity at described smooth layer of compensation place.
Described reflector is located between described first transparent electrode layer and the second transparent electrode layer, increase the reflection of emergent ray at described first exiting surface, reduce the transmission of emergent ray at described first exiting surface, and then reduce the luminous intensity in described organic electroluminescence device reflector described in described first exiting surface place, add the luminous intensity in reflector described in described second exiting surface place.Thus make on described second exiting surface, the luminous intensity at described reflector and described smooth layer of compensation place all strengthens.In addition, then by regulating the thickness in described reflector, and the area ratio of described reflector and described first transparent electrode layer, make the light intensity uniformity of the whole plane of described second exiting surface stronger.
Due in existing organic electroluminescence device, when not establishing reflector and light layer of compensation, the luminous intensity of described second exiting surface is less than the luminous intensity at described first exiting surface place.In the described organic electroluminescence device that the present embodiment provides, add the luminous intensity of described second exiting surface, also relatively reduce the luminous intensity at described first exiting surface place, thus make the luminous intensity uniformity of two of described organic electroluminescence device exiting surfaces stronger.
In addition, because the conductivity in described reflector is good, be equivalent to described first transparent electrode layer, reflector and the second transparent electrode layer and define shunt electrodes layer, reduce resistance, described reflector thus also improve the conductivity of described first transparent electrode layer and the second transparent electrode layer.
The embodiment of the present invention provides described organic electroluminescence device, the luminous intensity uniformity of its relative described first exiting surface and the second exiting surface.In addition, the arrangement mode in described reflector is according to the alteration of form of described first mask plate and the second mask plate, thus stable and uniform bright dipping, preparation method is simple, easy to utilize.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the organic electroluminescence device that Fig. 1 provides for the embodiment of the present invention;
The combination schematic diagram of the shading region that Fig. 2 provides for the embodiment of the present invention first execution mode and transparent area;
Preparation method's flow chart of the organic electroluminescence device that Fig. 3 provides for the embodiment of the present invention;
The combination schematic diagram of the shading region that Fig. 4 provides for the embodiment of the present invention second execution mode and transparent area;
The combination schematic diagram of the shading region that Fig. 5 provides for the embodiment of the present invention the 3rd execution mode and transparent area.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Below with reference to the accompanying drawings embodiments of the invention are described.See Fig. 1, in first embodiment of the invention, organic electroluminescence device 100(OLED) structural representation.Described organic electroluminescence device 100 comprises light-transparent substrate 10, first transparent electrode layer 20, reflector 30, second transparent electrode layer 40, organic luminescence function layer 50, semitransparent electrode layer 60 and the light layer of compensation 70 that stack gradually.
Described light-transparent substrate 10 comprises the first exiting surface 11 and coverage rate 12 that are oppositely arranged, and its material is glass.
Described first transparent electrode layer 20 is covered in described coverage rate 12, its material is one or more in indium tin oxide (ITO), indium-zinc oxide (IZO), aluminium zinc oxide (AZO) and gallium zinc oxide (GZO), and thickness is 70 ~ 200nm.The light transmittance of described first transparent electrode layer 20 is high, and conductivity is good.
See Fig. 2, the dispersion of described reflector 30 is covered in the formation shading region, surface 31 of described first transparent electrode layer 20, and described reflector 30 is not covered in the formation transparent area, surface 32 of described first transparent electrode layer 20.Wherein, described " dispersion cover " to be covered in the meaning on described first transparent electrode layer 20 surface in zones of different for described reflector 30.Described reflector 30 is metal material, concrete, and the material in reflector 30 can be the one in silver (Ag), aluminium (Al), gold (Au), platinum (Pt), nickel (Ni), copper (Cu) or chromium (Cr).The thickness in described reflector 30 is 40 ~ 70nm, and described reflector 30 is 20% ~ 80% with the area ratio of described first transparent electrode layer 20.Described reflector 30 is for reducing the light transmittance of described organic electroluminescence device 100.By regulating the area ratio of the thickness in described reflector 30 and described reflector 30 and described first transparent electrode layer 20, regulate the light transmittance of organic electroluminescence device 100.
In present embodiment, described shading region 31 and described transparent area 32 are all in strip, alternately arrange with described transparent area 32 in described shading region 31.And the equal and opposite in direction of transparent area 32 described in described shading region 31.In other embodiments, described shading region 31 is different with large I from the shape of described transparent area 32.
Comprehensive see Fig. 1 and Fig. 2, described second transparent electrode layer 40 is covered in described shading region 31 and described transparent area 32, thus forms a continuous print conductive membrane layer.The material of described second transparent electrode layer 40 is one or more in indium tin oxide, indium-zinc oxide, aluminium zinc oxide and gallium zinc oxide, and the thickness of described second transparent electrode layer 40 is 30 ~ 70nm.
Described organic luminescence function layer 50 is covered in described second transparent electrode layer 40 surface.Concrete, described organic luminescence function layer 50 comprises hole injection layer, hole transmission layer, luminescent layer, electron transfer layer and electron injecting layer.Described hole injection layer is covered in described second transparent electrode layer 40 surface, described hole transmission layer is covered in the surface of hole injection layer, described luminescent layer is covered in the surface of described hole transmission layer, described electron transfer layer is covered in the surface of described luminescent layer, and described electron injecting layer is covered in the surface of described electron transfer layer.Described organic luminescence function layer 50 is for luminescence.
Described semitransparent electrode layer 60 is covered in described organic luminescence function layer 50 surface.Concrete, described semitransparent electrode layer 60 is covered in the surface of described electron injecting layer.Described semitransparent electrode layer 60 is metal material, and concrete material is selected from silver (Ag), aluminium (Al), samarium (Sm), ytterbium (Yb), silver-colored aluminium (Ag-Al) close one in gold, silver magnesium (Ag-Mg) alloy, magnalium (Al-Mg) alloy.The thickness of described semitransparent electrode layer 60 is 18 ~ 35nm.The light transmittance of described semitransparent electrode layer 60 is 50% ~ 70%, a little less than the light transmittance of more than 80% of described first transparent electrode layer 20.
The shape complementarity in described smooth layer of compensation 70 and described reflector 30, described smooth layer of compensation 70 to be disappeared effect mutually by light interference, reduce emergent ray in the reflection of described semitransparent electrode layer 60 with Air Interface, increase emergent ray in the transmission of described translucent motor layer 60 with Air Interface place, thus add described organic electroluminescence device 100 on described second exiting surface 71, the luminous intensity at described smooth layer of compensation 70 place.
Described reflector 30 is located between described first transparent electrode layer 20 and the second transparent electrode layer 40, increase the reflection of emergent ray at described first exiting surface 11, reduce the transmission of emergent ray at described first exiting surface 11, and then reduce the luminous intensity in described organic electroluminescence device 100 reflector 30 described in described first exiting surface 11 place, add the luminous intensity in reflector 30 described in described second exiting surface 71 place.Thus make on described second exiting surface 71, the luminous intensity at described reflector 30 and described smooth layer of compensation 70 place all strengthens.In addition, then by regulating the thickness in described reflector 30, and the area ratio of described reflector 30 and described first transparent electrode layer 20, make the light intensity uniformity of the whole plane of described second exiting surface 71 stronger.
Due in existing organic electroluminescence device 100, when not establishing reflector 30 and light layer of compensation 70, the luminous intensity of described second exiting surface 71 is caused to be less than the luminous intensity at described first exiting surface 11 place.In the described organic electroluminescence device 100 that the present embodiment provides, add the luminous intensity of described second exiting surface 71, also relatively reduce the luminous intensity at described first exiting surface 11 place, thus make the luminous intensity uniformity of two exiting surfaces of described organic electroluminescence device 100 stronger.
See Fig. 3, the embodiment of the present invention additionally provides the preparation method of above-mentioned organic electroluminescence device 100.Its concrete steps comprise:
Step S1, provides a light-transparent substrate 10, and the material of described light-transparent substrate 10 is glass.
Step S2, described light-transparent substrate 10 prepares the first transparent electrode layer 20 by magnetron sputtering method, and sputtering rate is 0.1 ~ 2nm/s.
Step S3, provides the first mask plate, and described first mask plate fits in described first transparent electrode layer 20 surface.
Step S4, adopts evaporation or magnetron sputtering method, and in described first preparation reflector 30, mask plate surface, preparation speed is 0.1 ~ 2nm/s.
Step S5, takes off described first mask plate, and the dispersion of described reflector 30 is covered in the formation shading region, surface 31 of described first transparent electrode layer 20, and described reflector 30 is not covered in the formation transparent area, surface 32 of described first transparent electrode layer 20.On described shading region 31 and surface, transparent area 32, prepare the second transparent electrode layer 40 by magnetron sputtering method, sputtering rate is 0.1 ~ 2nm/s.
Step S6, adopts Vacuum Heat coating method, prepares organic luminescence function layer 50 on described second transparent electrode layer 40 surface.In described vacuum coating system, vacuum degree is 5 × 10
-4pa.
Step S7, adopts Vacuum Heat coating method, prepares semitransparent electrode layer 60 on described organic luminescence function layer 50 surface;
Step S8, provides the second mask plate, and described second mask plate coordinates with described first mask plate shape complementarity, and described second mask plate fits in described semitransparent electrode layer 60 surface, adopts evaporation or magnetron sputtering method to prepare light layer of compensation 70;
Step S9, takes off described second mask plate, prepares described organic electroluminescence device 100.
The embodiment of the present invention provides described organic electroluminescence device 100, the luminous intensity uniformity of its relative described first exiting surface 11 and the second exiting surface 71.In addition, the arrangement mode in described reflector 30 is according to the alteration of form of described first mask plate and the second mask plate, thus stable and uniform bright dipping, preparation method is simple, easy to utilize.
Refer to Fig. 4, the organic electroluminescence device 200 of second embodiment of the invention, roughly the same with the structure of organic electroluminescence device 100, its difference is: described shading region 131 and described transparent area 132 are square, alternately arrange with described transparent area 132 in described shading region 131, and fit in the limit of at least two limits of shading region 131 described in each and adjacent described transparent area 132, at least one angle of shading region 131 described in each and one jiao of shading region 131 described in another abut against.
Refer to Fig. 5, the organic electroluminescence device 300 of third embodiment of the invention, roughly the same with the structure of organic electroluminescence device 100, its difference is: described shading region 231 is square, multiple described shading region 231 is intervally arranged and does not connect mutually, described transparent area 232 and described shading region 231 shape complementarity.
Above-described execution mode, does not form the restriction to this technical scheme protection range.The amendment done within any spirit at above-mentioned execution mode and principle, equivalently to replace and improvement etc., within the protection range that all should be included in this technical scheme.
Claims (10)
1. an organic electroluminescence device, is characterized in that, comprise stack gradually light-transparent substrate, the first transparent electrode layer, reflector, the second transparent electrode layer, organic luminescence function layer, semitransparent electrode layer and light layer of compensation,
Described light-transparent substrate comprises the first exiting surface and coverage rate that are oppositely arranged, and described first transparent electrode layer is covered in described coverage rate; The dispersion of described reflector is covered in the formation shading region, surface of described first transparent electrode layer, described reflector is not covered in the formation transparent area, surface of described first transparent electrode layer, and the area ratio of described reflector and described first transparent electrode layer is 20% ~ 80%; Described second transparent electrode layer is covered in described shading region and described transparent area; Described organic luminescence function layer is covered in described second transparent electrode layer surface; Described semitransparent electrode layer is covered in described organic luminescence function layer surface; Described smooth layer of compensation is only covered in described semitransparent electrode layer surface corresponding to described transparent area, described smooth layer of compensation and described reflector shape complementarity, described semitransparent electrode layer and described smooth layer of compensation surface form the second exiting surface, and the material of described smooth layer of compensation is selected from the one in zinc sulphide or zinc selenide.
2. organic electroluminescence device as claimed in claim 1, it is characterized in that, the material of described first transparent electrode layer is one or more in indium tin oxide, indium-zinc oxide, aluminium zinc oxide and gallium zinc oxide, and the thickness of described first transparent electrode layer is 70 ~ 200nm; The material of described second transparent electrode layer is one or more in indium tin oxide, indium-zinc oxide, aluminium zinc oxide and gallium zinc oxide, and the thickness of described second transparent electrode layer is 30 ~ 70nm.
3. organic electroluminescence device as claimed in claim 1, it is characterized in that, the material in described reflector is selected from as the one in silver, aluminium, gold, platinum, nickel, copper or chromium, and the thickness in described reflector is 40 ~ 70nm.
4. organic electroluminescence device as claimed in claim 1, it is characterized in that, described shading region and described transparent area are all in strip, alternately arrange in described shading region and described transparent area.
5. organic electroluminescence device as claimed in claim 1, it is characterized in that, described shading region and described transparent area are square, alternately arrange in described shading region and described transparent area, and fit in the limit of at least two limits of shading region described in each and adjacent described transparent area, at least one angle of shading region described in each and one jiao of shading region described in another abut against.
6. organic electroluminescence device as claimed in claim 1, is characterized in that, described shading region is square, and multiple described shading region is intervally arranged and does not connect mutually.
7. organic electroluminescence device as claimed in claim 1, it is characterized in that, described organic luminescence function layer comprises hole injection layer, hole transmission layer, luminescent layer, electron transfer layer and electron injecting layer, described hole injection layer is covered in described second transparent electrode layer surface, described hole transmission layer is covered in the surface of hole injection layer, described luminescent layer is covered in the surface of described hole transmission layer, described electron transfer layer is covered in the surface of described luminescent layer, described electron injecting layer is covered in the surface of described electron transfer layer, described semitransparent electrode layer is covered in the surface of described electron injecting layer.
8. organic electroluminescence device as claimed in claim 1, it is characterized in that, the material of described semitransparent electrode layer is selected from as the one in silver, aluminium, samarium, ytterbium, aerdentalloy, silver-colored magnesium alloy, almag, and the thickness of described semitransparent electrode layer is 18 ~ 35nm.
9. organic electroluminescence device as claimed in claim 1, it is characterized in that, the thickness of described smooth layer of compensation is 40 ~ 80nm, and the area ratio of described smooth layer of compensation and described semitransparent electrode layer is 20% ~ 80%.
10. a preparation method for the organic electroluminescence device as described in any one of claim 1 ~ 9, is characterized in that, comprises step as follows:
One light-transparent substrate is provided;
Described light-transparent substrate prepares the first transparent electrode layer by magnetron sputtering method, and sputtering rate is 0.1 ~ 2nm/s;
There is provided the first mask plate, described first mask plate fits in described first transparent electrode layer surface;
Adopt evaporation or magnetron sputtering method, in described first preparation reflector, mask plate surface, preparation speed is 0.1 ~ 2nm/s;
Take off described first mask plate, the dispersion of described reflector is covered in the formation shading region, surface of described first transparent electrode layer, described reflector is not covered in the formation transparent area, surface of described first transparent electrode layer, on described shading region and surface, transparent area, prepare the second transparent electrode layer by magnetron sputtering method, sputtering rate is 0.1 ~ 2nm/s;
Adopt Vacuum Heat coating method, prepare organic luminescence function layer on described second transparent electrode layer surface;
Adopt Vacuum Heat coating method, prepare semitransparent electrode layer on described organic luminescence function layer surface;
There is provided the second mask plate, described second mask plate coordinates with described first mask plate shape complementarity, and described second mask plate fits in described semitransparent electrode layer surface, adopts evaporation or magnetron sputtering method to prepare light layer of compensation;
Take off described second mask plate, prepare described organic electroluminescence device.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104466025A (en) * | 2014-12-26 | 2015-03-25 | 北京维信诺科技有限公司 | Reflecting electrode and preparation method and application thereof |
| CN110021628A (en) * | 2017-12-06 | 2019-07-16 | 乐金显示有限公司 | Transparent organic light emitting diode display |
| CN111682079A (en) * | 2020-06-01 | 2020-09-18 | 大连理工大学 | Medium/far infrared transparent conductive material system and method for preparing conductive film by using same |
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| CN101540373A (en) * | 2009-04-22 | 2009-09-23 | 南京邮电大学 | Blue-light top luminous organic diode structure and fabricating method thereof |
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