CN102201545A - Organic light-emitting device - Google Patents
Organic light-emitting device Download PDFInfo
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- CN102201545A CN102201545A CN2011101270127A CN201110127012A CN102201545A CN 102201545 A CN102201545 A CN 102201545A CN 2011101270127 A CN2011101270127 A CN 2011101270127A CN 201110127012 A CN201110127012 A CN 201110127012A CN 102201545 A CN102201545 A CN 102201545A
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Abstract
The invention provides an organic light-emitting device (OLED), which is characterized by comprising a transparent substrate, an anode, an organic light-emitting layer, a cathode and a light scattering film, wherein the anode is positioned on the transparent substrate; the organic light-emitting layer is positioned on the anode; the cathode is positioned on the organic light-emitting layer; the light scattering film is positioned below the transparent substrate and has the thickness of more than 100mu m; and scattering particles are doped in a matrix of the light scattering film and have the size of between 100 and 1,000nm, the weight ratio of the scattering particles to the matrix is between 0.05 and 10 percent, and refractive index of the scattering particles is different from that of the matrix. Due to the adoption of the light scattering film, incident light can be reflected repeatedly, and the probability of light scattering at different angles is improved, so that color differences of the OLED at different visual angles are reduced.
Description
Technical field
The present invention relates to a kind of organic luminescent device, relate in particular to the little organic luminescent device of a kind of different visual angles color distortion.
Background technology
The structure of organic luminescent device (Organic light-emitting device is abbreviated as OLED) is carried out work based on the electroluminescence principle.Its typical structure is that the luminous organic material of making one deck tens nanometer thickness on ito glass is made luminescent layer, and there is the metal electrode of one deck low work function the luminescent layer top.When being added with voltage on the electrode, luminescent layer just produces light radiation.(TFEL) is different with the inorganic thin-film electrofluorescence device, the electroluminescence of organic material belongs to pouring-in recombination luminescence, its luminescence mechanism is to be combined into exciton by hole and electronics that anode and negative electrode produce in luminescent material, the energy of exciton is transferred to light emitting molecule, make the electronics in the light emitting molecule be excited to excitation state, and excitation state is a unsure state, and the process of going to swash produces visible light.
Organic luminescent device (OLED) has gently, approaches, high chroma, high contrast and the first-class advantage of substrate that can be made in deflection, can be as illumination and display application.But, organic luminescent device (0LED) is an optics microresonator structure, the wavelength difference of the phase matched of different visual angles, can cause the amount of light of the different wave length of different visual angles to change, make organic luminescent device (OLED) in the photochromic change of the bright dipping of different visual angles, thereby the color of the organic luminescent device of different visual angles (OLED) exist than big-difference.
In view of this, how designing a kind of novel organic luminescent device (OLED), to reduce the different visual angles color distortion as much as possible, is the problem that those skilled in the art need solution badly.
Summary of the invention
In prior art, there is the defective than big-difference in the color of the organic luminescent device of existence (OLED) different visual angles, the invention provides a kind of novel organic luminescent device.
According to the invention provides a kind of organic luminescent device, comprising: transparent substrates, anode, organic luminous layer, negative electrode and light-diffusing films.Wherein, anode is positioned on the transparent substrates; Organic luminous layer is positioned on the anode; Negative electrode is positioned on the organic luminous layer; And light-diffusing films is positioned at the below of transparent substrates and thickness greater than 100 μ m, be mixed with scattering particles in the matrix of light-diffusing films, size between 100～1000 nanometers and and the weight ratio of matrix between 0.05～10%, scattering particles is different with the refractive index of matrix.
Preferably, matrix is made by organosilicon material.
Preferably, scattering particles is different with host material, comprises titanium oxide, zirconia or Nano particles of silicon dioxide.
Preferably, anode is made by indium tin oxide.
Preferably, negative electrode is by at least a making in magnesium, aluminium, silver or the calcium.
Preferably, organic luminescent device further comprises hole transmission layer, between anode and organic luminous layer.
Preferably, organic luminescent device further comprises electron transfer layer, between negative electrode and organic luminous layer.
Preferably, organic luminescent device further comprises hole injection layer, between anode and hole transmission layer.
Preferably, transparent substrates can be made by glass.
Adopt organic luminescent device of the present invention (OLED), can carry out repeatedly scattering, increase the probability of light scattering, therefore can reduce the difference of organic luminescent device (OLED) different visual angles color to different angles to incident light.
Description of drawings
The reader will become apparent various aspects of the present invention after the reference accompanying drawing has been read the specific embodiment of the present invention.Wherein,
Fig. 1 shows the organic luminescent device cross sectional representation of no light-diffusing films in the prior art;
Fig. 2 shows the organic luminescent device cross sectional representation that has the glimmer scattering film in the prior art;
Fig. 3 shows according to organic luminescent device cross sectional representation of the present invention.
Embodiment
With reference to the accompanying drawings, the specific embodiment of the present invention is described in further detail.
Fig. 1 shows the organic luminescent device cross sectional representation of no light-diffusing films in the prior art.With reference to Fig. 1, organic luminescent device 10 comprises: transparent substrates 100, anode 110, hole transmission layer 120, organic luminous layer 130, electron transfer layer 140 and negative electrode 150.Wherein, anode 110 is positioned on the transparent substrates 100, and hole transmission layer 120 is positioned on the anode 110, and organic luminous layer 130 is positioned on the hole transmission layer 120, and electron transfer layer 140 is positioned on the organic luminous layer 130, and negative electrode 150 is positioned at electron transfer layer 140 tops.Under bias condition, with compound at organic luminous layer 130 places, cause organic luminous layer 130 luminous from the hole of anode 110 from the electronics of negative electrode 150.
As shown in Figure 1, the light that sends from organic luminous layer 130 passes hole transmission layer 120, anode 110 and transparent substrates 100 successively, because the coupling wavelength difference of various light, so when light 101 when transparent substrates 100 enters air, refractive index is also different, can cause the amount of light of the different wave length of different visual angles that a lot of differences are arranged, thereby make organic luminescent device 10 very big-difference be arranged in that the bright dipping of different visual angles is photochromic.
Fig. 2 shows the organic luminescent device cross sectional representation that has the glimmer scattering film in the prior art.With reference to Fig. 2, organic luminescent device 20 comprises: transparent substrates 200, anode 210, hole transmission layer 220, organic luminous layer 230, electron transfer layer 240, negative electrode 250 and light-diffusing films 260.Similar to Fig. 1, anode 210 is positioned on the transparent substrates 200, and hole transmission layer 220 is positioned on the anode 210, and organic luminous layer 230 is positioned on the hole transmission layer 220, electron transfer layer 240 is positioned on the organic luminous layer 230, and negative electrode 250 is positioned at electron transfer layer 240 tops.Equally under bias condition, with compound at organic luminous layer 230 places, cause organic luminous layer 230 luminous from the hole of anode 210 from the electronics of negative electrode 250.The light that sends from organic luminous layer 230 passes hole transmission layer 220, anode 210 and transparent substrates 200 successively.
Continuation is with reference to Fig. 2, in order to improve coupling wavelength difference because of various light, cause the amount of light of the different wave length of different visual angles that a lot of differences are arranged, make organic luminescent device the very defective of big-difference be arranged in that the bright dipping of different visual angles is photochromic, below transparent substrates 200, attach light-diffusing films 260, because be mixed with dispersed particle 262 in the matrix 261 of light-diffusing films 260, the light 201 that comes out from transparent substrates 200 can be carried out scattering, increased the probability that light 201 scatters to different visual angles, can improve the photochromic discrepant defective of the different visual angles of above-mentioned existence a little, but because light-diffusing films 260 is thinner, narrower from the angular field of view that the light 201 of transparent substrates 200 has after scattering, so the photochromic difference that different visual angles exists is still bigger.
Fig. 3 shows according to organic luminescent device cross sectional representation of the present invention.With reference to Fig. 3, organic luminescent device 30 comprises: transparent substrates 300, anode 310, hole transmission layer 320, organic luminous layer 330, electron transfer layer 340, negative electrode 350 and light-diffusing films 360.In the present embodiment, transparent substrates 300 is made by glass, and anode 310 is indium tin oxide layers, and negative electrode 350 is made by the magnesium silver alloy.
Similar to Fig. 2, anode 310 is positioned on the transparent substrates 300, and hole transmission layer 320 is positioned on the anode 310, and organic luminous layer 330 is positioned on the hole transmission layer 320, electron transfer layer 340 is positioned on the organic luminous layer 330, and negative electrode 350 is positioned at electron transfer layer 340 tops.In a further embodiment, between anode 310 and the hole transmission layer 320 hole injection layer can also be set.Under bias condition, with compound at organic luminous layer 330 places, cause organic luminous layer 330 luminous from the hole of anode 310 from the electronics of negative electrode 350.The light that sends from organic luminous layer 330 passes hole transmission layer 320, anode 310 and transparent substrates 300 successively.
Equally in order to improve coupling wavelength difference because of various light, cause the amount of light of the different wave length of different visual angles that a lot of differences are arranged, make organic luminescent device the very defective of big-difference be arranged in that the bright dipping of different visual angles is photochromic, below transparent substrates 300, be provided with light-diffusing films 360, be mixed with scattering particles 362 in the matrix 361 of light-diffusing films 360, the size of scattering particles 362 is between 100～1000 nanometers, and the weight ratio of matrix 361 is between 0.05～10%, the material of matrix 361 is an organosilicon material, scattering particles 362 is the TiOx nano particle in the present embodiment, in a further embodiment, scattering particles 362 can be zirconia or Nano particles of silicon dioxide.The refractive index of scattering particles 362 is greater than or less than matrix 361.Light-diffusing films 360 thickness are greater than 100 μ m, because light-diffusing films 360 is thicker, can carry out repeatedly scattering to light 301 from transparent substrates 300, so just can increase the probability that light 301 scatters to different visual angles, to improve organic luminescent device in the photochromic very defective of big-difference that exists of the bright dipping of different visual angles.
Advantage of the present invention is: organic luminescent device has thick light-diffusing films, the light that enters air can be carried out repeatedly scattering, increases the chance of light scattering to different angles, to reduce the photochromic difference of different visual angles organic luminescent device.
Above, describe the specific embodiment of the present invention with reference to the accompanying drawings.But those skilled in the art can understand, and under situation without departing from the spirit and scope of the present invention, can also do various changes and replacement to the specific embodiment of the present invention.These changes and replacement all drop in claims restricted portion of the present invention.
Claims (9)
1. an organic luminescent device is characterized in that, comprising:
Transparent substrates;
Anode is positioned on the described transparent substrates;
Organic luminous layer is positioned on the described anode;
Negative electrode is positioned on the described organic luminous layer; And
Light-diffusing films, be positioned at the below of described transparent substrates and thickness greater than 100 μ m, be mixed with scattering particles in the matrix of described light-diffusing films, size between 100～1000 nanometers and and the weight ratio of described matrix between 0.05～10%, described scattering particles is different with the refractive index of described matrix.
2. organic luminescent device as claimed in claim 1 is characterized in that described matrix is made by organosilicon material.
3. organic luminescent device as claimed in claim 1 is characterized in that, described scattering particles is different with described host material, comprises titanium oxide, zirconia or Nano particles of silicon dioxide.
4. organic luminescent device as claimed in claim 1 is characterized in that described anode is made by indium tin oxide.
5. organic luminescent device as claimed in claim 1 is characterized in that, described negative electrode is by at least a making in magnesium, aluminium, silver or the calcium.
6. organic luminescent device as claimed in claim 1 is characterized in that, further comprises hole transmission layer, between described anode and described organic luminous layer.
7. organic luminescent device according to claim 1 is characterized in that, further comprises electron transfer layer, between described negative electrode and described organic luminous layer.
8. organic luminescent device according to claim 6 is characterized in that, further comprises hole injection layer, between described anode and described hole transmission layer.
9. organic luminescent device according to claim 1 is characterized in that described transparent substrates can be made by glass.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101270127A CN102201545A (en) | 2011-05-13 | 2011-05-13 | Organic light-emitting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101270127A CN102201545A (en) | 2011-05-13 | 2011-05-13 | Organic light-emitting device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700689A (en) * | 2013-12-23 | 2014-04-02 | 京东方科技集团股份有限公司 | Flexible luminous display device as well as manufacturing method and application carrier thereof |
| CN104218154A (en) * | 2013-05-30 | 2014-12-17 | 海洋王照明科技股份有限公司 | Organic light emission diode device and fabrication method thereof |
| CN108474875A (en) * | 2015-09-23 | 2018-08-31 | 康宁公司 | Use the light extraction of the OLED of nanostructured coatings |
| CN108963106A (en) * | 2018-07-24 | 2018-12-07 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof, display device |
-
2011
- 2011-05-13 CN CN2011101270127A patent/CN102201545A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218154A (en) * | 2013-05-30 | 2014-12-17 | 海洋王照明科技股份有限公司 | Organic light emission diode device and fabrication method thereof |
| CN103700689A (en) * | 2013-12-23 | 2014-04-02 | 京东方科技集团股份有限公司 | Flexible luminous display device as well as manufacturing method and application carrier thereof |
| CN108474875A (en) * | 2015-09-23 | 2018-08-31 | 康宁公司 | Use the light extraction of the OLED of nanostructured coatings |
| US11005075B2 (en) | 2015-09-23 | 2021-05-11 | Corning Incorporated | OLED light extraction using nanostructured coatings |
| CN108474875B (en) * | 2015-09-23 | 2022-02-11 | 康宁公司 | Light extraction of OLEDs using nanostructured coatings |
| CN108963106A (en) * | 2018-07-24 | 2018-12-07 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof, display device |
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Application publication date: 20110928 |