CN100359712C - Organic electroluminescent elements and producing method thereof, and two-dimensional display applying the same - Google Patents
Organic electroluminescent elements and producing method thereof, and two-dimensional display applying the same Download PDFInfo
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- CN100359712C CN100359712C CNB2005100702128A CN200510070212A CN100359712C CN 100359712 C CN100359712 C CN 100359712C CN B2005100702128 A CNB2005100702128 A CN B2005100702128A CN 200510070212 A CN200510070212 A CN 200510070212A CN 100359712 C CN100359712 C CN 100359712C
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Abstract
The present invention relates to an organic electroluminescent element which comprises a base board, an anode, a cathode, a phosphorescent luminous layer, a positive hole transmission layer and a positive hole blocking layer, wherein the anode and the cathode are oppositely arranged on the base board, and the phosphorescent luminous layer is arranged between the anode and the cathode and is composed of a luminous material with an octahedral structure. The positive hole transmission layer is arranged between the anode and the phosphorescent luminous layer, and the positive hole blocking layer is arranged between the phosphorescent luminous layer and the cathode.
Description
Technical field
The present invention relates to a kind of organic electroluminescent element (organic electroluminescent device, OELD), particularly relate to a kind of organic electroluminescent element and its flat display apparatus of manufacture method and application thereof with the phosphorescence luminescent layer that luminescent material was constituted with octahedral structure.
Background technology
Traditional organic electroluminescent element (organic electroluminescent device, OELD) be a multilayer stack architecture, and comprising a substrate, an anode, a negative electrode, a hole injection layer, a hole transmission layer, an electron transfer layer, an electron injecting layer and a luminescent layer, anode, hole injection layer, hole transmission layer, luminescent layer, electron transfer layer, electron injecting layer and negative electrode are arranged on the substrate in regular turn from bottom to top.Wherein, luminescent layer comprises host and guest's doped system, and a spot of guest emitter promptly mixes in the host emitter of volume.As for how defining this host and guest's doped system is that fluorescence (fluorescence) host and guest's doped system or phosphorescence (phosphorescence) host and guest doped system will be described as follows:
When negative electrode and anode are applied in a voltage, electronics will be by negative electrode to inject luminescent layer by the mode of electron injecting layer and electron transfer layer, the hole will be by anode to inject luminescent layer by the mode of hole injection layer and hole transmission layer, and electronics and hole can cause host emitter to be energized into excite state by ground state after the combination in luminescent layer.Owing to be in the host emitter instability of excite state, so host emitter must turn back to ground state by excite state, and with energy delivery to guest emitter.
When being energized into excite state when the guest emitter received energy and by ground state, guest emitter will produce singlet state exciton (singlet excition) and triplet exciton (triplet excition).No matter be fluorescence guest emitter or phosphorescence guest emitter, because the distributive law of electron spin attitude all can cause the formation probability of triplet exciton and singlet state exciton to be about 3: 1.
Singlet state exciton or triplet exciton will return stable ground state with the form that discharges photon, make organic electroluminescent element produce the phenomenon of electroluminescence.In fluorescence host and guest doped system, the light of being launched when having only the singlet state exciton to return ground state is visible fluorescence.Relatively, in phosphorescence host and guest doped system, the light of being launched when returning ground state except triplet exciton is visible phosphorescence, and the light of being launched when the singlet state exciton returns ground state also can see through and exchange in the system that (intemal system crossing ISC) is converted to phosphorescence.
For fluorescence host and guest doped system, the exciton half life when the singlet state exciton returns ground state by excite state (exciton lifetime) is about nanosecond, and (nanosecond, ns) level will be sent visible fluorescence.
For phosphorescence host and guest doped system, the exciton half life when triplet exciton returns ground state by excite state is about nanosecond (microsecond, μ s) level, will send visible phosphorescence.In the mechanism of organic electric-excitation luminescent, because it is 3: 1 that the distributive law of electron spin attitude causes the probability of the formation of triplet exciton and singlet state exciton, adding the phosphorescence guest emitter has with the Conversion of energy of the singlet state exciton of the host emitter characteristic for the energy of self triplet exciton, so the internal quantum of phosphorescence guest emitter is about 4 times (theoretical value can arrive 100%) of fluorescence guest emitter.So the luminous efficiency of phosphorescence host and guest doped system is not worse than the luminous efficiency of fluorescence host and guest doped system, but the exciton half life is long.
Yet the disadvantage of phosphorescence host and guest doped system is that the exciton half life is oversize.Because the half life of triplet exciton is up to μ s level, that is represents triplet exciton to rest on the singlet state exciton that time in the luminescent layer can be more general and grown about about 1,000 times.Thus, triplet exciton long time of staying in luminescent layer will cause taking place between the triplet exciton triplet exciton self-destruction phenomenon (triplet-triplet annihilation).That is to say that the triplet exciton and another triplet exciton that is in excite state that are in excite state bump against easily, the energy that the result causes two triplet excitons is with the form consume of heat or vibration, but do not discharge with the form of photon.Thus, the luminous efficiency that contains the organic electroluminescent element (as phosphorescent element) of phosphorescence host and guest doped system will present rapid downward trend along with the increase of injection current, and the luminous efficiency that influences phosphorescent element is very huge.Explanation as for the triplet exciton self-destruction phenomenon (triplet-triplet annihilation) that is faced in the phosphorescence host and guest doped system can be with reference to Baldo, Thompson and Forrest, Appl.Phys.Lett.1999,75 (1), 4-6. and R.J.Holmes and S.R.Forrest, and M.E.Thompson et al.Appl.Phys.Lett.82 (15), 2422 (2003). wait pertinent literature.
In addition, the phosphorescence luminescent layer of tradition organic electroluminescent element still need use main, that guest emitter constituted host and guest's doped system, its reason is nothing more than being that the phosphorescence guest emitter in the Prior Art mostly is plane or chondritic greatly, its intermolecular storehouse is stronger, cause the ability of anti-concentration quenching too poor due to.So-called concentration quenching effect is the delustring mechanism that often occurs in the organic dyestuff, its principle be the molecule of organic dyestuff because of doping content is too high, cause the undue storehouse of molecule, so that destroy the characteristics of luminescence originally and lower luminous efficiency.Because the molecular structure of the guest emitter of phosphorescence luminescent layer roughly belongs to planar structure, its three-dimensional resistance barrier is quite not enough, when the guest emitter doping content is too high, causes the undue storehouse of guest emitter of phosphorescence luminescent layer easily, produces so-called concentration quenching effect.Therefore, the preparation method of traditional phosphorescence luminescent layer need be entrained in a spot of phosphorescence guest emitter in a large amount of host emitters, uses the concentration of dilution phosphorescence guest emitter in the phosphorescence luminescent layer, reduces the generation probability of concentration quenching effect.Yet, just must use complicated common evaporation coating technique to form the above-mentioned phosphorescence luminescent layer main, guest emitter that contains thus, will cause the degree of difficulty of technology to improve and expensive production cost.
Summary of the invention
In view of this, purpose of the present invention be exactly provide a kind of organic electroluminescent element (organicelectroluminescent device, OELD) and its flat display apparatus of manufacture method and application.It is with the design of the phosphorescence luminescent layer that luminescent material was constituted with octahedral structure, make that the solid resistance barrier of luminescent material of the present invention is not worse than the planar structure of traditional phosphorescence guest emitter, any other host emitter or guest emitter so phosphorescence luminescent layer of the present invention does not need to mix again broken away from the yoke of the design of traditional phosphorescence host and guest doped system widely.Thus, not only can avoid the generation of concentration quenching effect, more can exempt traditionally the difficulty in process degree that is faced when common evaporation process with complexity forms the luminescent layer of host and guest's doped system, it is many to simplify technology, and can save production cost.Even, organic electric-excitation luminescent spare of the present invention more can eliminate effectively in traditional phosphorescent element the delustring mechanism eliminated of the triplet that can face.
According to purpose of the present invention, a kind of organic electroluminescent element is proposed, comprise a substrate, an anode, a negative electrode, a phosphorescence luminescent layer, a hole transmission layer and a hole blocking layer.Anode and negative electrode are arranged on the substrate accordingly, and the phosphorescence luminescent layer is arranged between anode and the negative electrode, and are made of a luminescent material with octahedral structure.Hole transmission layer is arranged between anode and the phosphorescence luminescent layer, and hole blocking layer is arranged between phosphorescence luminescent layer and the negative electrode.
According to a further object of the present invention, a kind of flat display apparatus is proposed, tool comprises above-mentioned organic electroluminescent element.Wherein, flat display apparatus also comprises mobile display device and flat-panel screens.Wherein, this flat-panel screens comprises computer screen, flat-surface television, monitoring screen or car mo(u)ld top half screen.
According to another object of the present invention, a kind of manufacture method of organic electroluminescent element is proposed.At first, provide a substrate.Then, form a hole transmission layer on substrate.Then, form a phosphorescence luminescent layer on hole transmission layer, the phosphorescence luminescent layer is made of a luminescent material with octahedral structure.Then, form a hole blocking layer on the phosphorescence luminescent layer.Then, form a negative electrode on hole blocking layer.
The luminescent material of above-mentioned octahedral structure is represented with chemical formula [I]:
Wherein, " M " be atomic number basically greater than 40 metallic atom, " Q1 " reach " Q2 " be identical or different two chelating substituting groups, " S1 " reach " S2 " be identical or different single chelating substituting group.In addition, " M " be selected from osmium (osmium, Os), rubidium (rubidium, Rb), ruthenium (ruthenium, Ru), iridium (iridium, Ir), platinum (platinum, Pt), rhenium (rhenium, Re), thallium (thallium, T1), palladium (palladium, Pb) or rhodium (rhodium, Rh).Central atom selects atomic number can allow this luminescent material with octahedral structure launch visible phosphorescence greater than 40 transition metal, and Q1 and Q2 can be two arbitrarily stinging and close substituting group, and S1 and S2 then close substituting group for singly stinging arbitrarily.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, following conjunction with figs. and preferred embodiment are to illustrate in greater detail the present invention.
Description of drawings
It is schematic diagram according to the cross-section structure of the organic electroluminescent element of embodiments of the invention one that Fig. 1 illustrates.
It is the rectangular plots that concerns between the brightness of organic electric-excitation luminescent spare of Fig. 1 and the luminous efficiency that Fig. 2 illustrates.
It is flow chart according to the manufacture method of the organic electroluminescent element of embodiments of the invention two that Fig. 3 illustrates.
It is schematic diagram according to the flat display apparatus of the organic electroluminescent element of application the foregoing descriptions of embodiments of the invention three that Fig. 4 illustrates.
It is schematic diagram according to the flat display apparatus of the above-mentioned organic electroluminescent element of the application of embodiments of the invention four that Fig. 5 illustrates.
The simple symbol explanation
10: organic electroluminescent element
11: substrate
12: anode
13: negative electrode
14: the phosphorescence luminescent layer
15: hole transmission layer
16: hole blocking layer
17: electron transfer layer
18: hole injection layer
19: electron injecting layer
70: flat display apparatus
71,81: casing
71a, 81a: front openings
72,82: display floater
80: mobile display device
83: key groups
Embodiment
Embodiment one
Please refer to Fig. 1, it illustrates is organic electroluminescent element (organic electroluminescent device, the schematic diagram of cross-section structure OELD) according to embodiments of the invention one.In the present embodiment, organic electroluminescent element comprises micromolecule Organic Light Emitting Diode (organic light emittingdiode, OLED) and polymer LED (polymer light emitting diode, PLED), at this is that example explains with OLED, but the disclosed technology of present embodiment also can be applicable on the PLED.
In Fig. 1, organic electroluminescent element 10 comprises a substrate 11, an anode 12, a negative electrode 13, a phosphorescence (phosphorescence) luminescent layer 14, a hole transmission layer 15 and a hole blocking layer 16 at least.Anode 12 is relatively arranged on the substrate 11 with negative electrode 13, and negative electrode 13 is arranged at the top of anode 12.Phosphorescence luminescent layer 14 is arranged between anode 12 and the negative electrode 13, and is made of a luminescent material with octahedral structure, will be in hereinafter disclosing as for this chemical formula with luminescent material of octahedral structure.The concentration of the luminescent material of octahedral structure in phosphorescence luminescent layer 14 is 100%, do not need to utilize the luminous doped system of host and guest in the expression phosphorescence luminescent layer 14, can phosphoresce, break away from the yoke of the design of the phosphorescence luminescent layer in traditional phosphorescence host and guest doped system widely.
Illustrate that with several chemical formulas the above-mentioned luminescent material with octahedral structure is represented with chemical formula [I] at this as for this luminescent material with octahedral structure:
Wherein, " M " be atomic number greater than 40 metallic atom; can allow this luminescent material launch visible phosphorescence with octahedral structure, " Q1 " reach " Q2 " be identical or different two chelating substituting groups, " S1 " reach " S2 " be identical or different single chelating substituting group.
Because " Q1 " reach " Q2 " be identical or different two chelating substituting groups, so " M " with " Q1 " reach " Q2 " definition one quadrangular plan.Moreover, " S1 " with " S2 " can be compared to be " M " with " Q1 " reach " Q2 " 2 points up and down of a defined quadrangular plan, so " M ", " Q1 ", " Q2 ", " S1 " reach " S2 " define an octahedral structure.Wherein, the luminescent material with octahedral structure of present embodiment is represented with chemical formula [II]:
In the present embodiment, anode 12, hole injection layer 18, hole transmission layer 15, hole blocking layer 16, electron transfer layer 17, the material of electron injecting layer 19 and negative electrode 13 is respectively with indium indium tin oxide (indium tin oxide, ITO), copper phthalocyanine (CuPc), 1,1-bis[N-(1-naphthyl)-N '-phenylamino] biphenyl-4,4 ' diamine (NPB), bis (2-methyl-8-quinolinolato) is aluminum (BAlq) (p-phenylphenolato), tris (8-hydroxyquinolinato) aluminum (Alq
3), lithium fluoride (LiF) and aluminium (Al) is for example explains, the thickness of hole injection layer 18, hole transmission layer 15, hole blocking layer 16, electron injecting layer 19 and negative electrode 13 is approximately 15,60,15,1 and 200 nanometers (nm) respectively.In addition, the luminescent material that has octahedral structure in the phosphorescence luminescent layer 14 is that example explains with the represented luminescent material of chemical formula [II], and its thickness is approximately 30 nanometers (nm).
When anode 12 and negative electrode 13 are applied in a voltage, electronics will be by negative electrode 13 to inject phosphorescence luminescent layer 14 by the mode of electron injecting layer 19, electron transfer layer 17 and hole blocking layer 16 in regular turn, and the hole will be by anode 12 to inject phosphorescence luminescent layer 14 by the mode of hole injection layer 18 and hole transmission layer 15 in regular turn.When electronics and hole in phosphorescence luminescent layer 14 in conjunction with the time, the luminescent material of octahedral structure (material shown in chemical formula [II]) will produce singlet state exciton (singlet excition) and triplet exciton (triplet excition), and the ratio of generation singlet state exciton and triplet exciton is 3: 1.Wherein, triplet exciton on the octahedra luminescent material can discharge phosphorescence in returning the process of ground state, and the singlet state exciton can see through in self system of luminescent material (material shown in chemical formula [II]) of octahedral structure and exchange (internal system crossing, ISC) be converted into triplet exciton, final all discharge with the pattern of visible phosphorescence.
Please refer to Fig. 2, it illustrates is the rectangular plots that concerns between the brightness of organic electric-excitation luminescent spare of Fig. 1 and the luminous efficiency.From the luminous efficiency of Fig. 2 trend for brightness, the organic electroluminescent element that can know present embodiment has the luminous efficiency about 3.1cd/A when low-light level, and this luminous efficiency can't have any variation along with the increase of operation brightness.High luminosity 5, the 000 (cd/m of organic electroluminescent element when present embodiment
2, in the time of nits), the luminous efficiency of the organic electroluminescent element of present embodiment still maintains more than the 3.0cd/A.Because of causing luminous efficiency, heavy attitude exciton self-destruction phenomenon (triplet-triplet annihilation) can significantly rise and downward trend the existing delustring mechanism that triplet is eliminated in the phosphorescent element of eliminating of imitating of the organic electroluminescent element of obvious present embodiment along with operation brightness with respect to traditional phosphorescent element.So, present embodiment constitute the design of phosphorescence luminescent layer with the luminescent material of octahedral structure, break away from the design of phosphorescence host and guest doped system traditionally widely, the luminous efficiency of the organic electroluminescent element of present embodiment can't present rapid downward trend along with the increase of injection current, promotes the luminous efficiency of phosphorescent element widely.
Have in the technical field under the right present embodiment and know that usually the knowledgeable can also understand that the technology of present embodiment is not confined to this, for example, anode 12 and negative electrode 13 comprise metal, metal alloy or transparent conductive material, and at least one electrode is transparent or semitransparent electrode among anode 12 and the negative electrode 13.Above-mentioned transparent conductive material comprise indium tin oxide (indium tin oxide, ITO), indium-zinc oxide (indium zincoxide, IZO), the cadmium tin-oxide (cadmium tin oxide, CTO), tin oxide (stannim dioxide, SnO
2) and zinc oxide (above-mentioned metal and metal alloy comprise gold (aurum for zinc oxide, similar transparent metal oxide such as ZnO), Au), aluminium (aluminum, Al), indium (indium, In), magnesium (magnesium, Mg) and calcium (calcium, Ca) etc.
When having only anode 12 when transparent or semitransparent, negative electrode 13 can be reflective metal, and then organic electroluminescent element 10 is bottom-emission element (bottom emission device), and substrate 11 is necessary for transparent or semitransparent substrate.When having only negative electrode 13 when transparent or semitransparent, anode 12 can be reflective metal, and then organic electroluminescent element 10 is top light emitting element (top emission device), and substrate 11 can be transparent, translucent or nontransparent substrate.When anode 12 and negative electrode 13 when being transparent or semitransparent, organic electroluminescent element 10 is double-side element (dual emission device), and substrate 11 is necessary for transparent or semitransparent substrate.
Below illustrate respectively in the above-mentioned chemical formula [I] " M ", " Q1 ", " Q2 ", " S1 " reach " S2 ".At first, " M " be selected from osmium (osmium, Os), rubidium (rubidium, Rb), ruthenium (ruthenium, Ru), iridium (iridium, Ir), platinum (platinum, Pt), rhenium (rhenium, Re), thallium (thallium, Tl), palladium (palladium, Pb) or rhodium (rhodium, Rh).
Though the luminescent material of the octahedral structure of present embodiment is that example explains with chemical formula [II], the technology of present embodiment is not confined to this, and the luminescent material of any octahedral structure that can luminescent phosphor all can be in the phosphorescence luminescent layer 14 of present embodiment.
Because the phosphorescence luminescent layer 14 of present embodiment is made of the luminescent material of octahedral structure, its three-dimensional resistance barrier is not worse than the planar structure of traditional phosphorescence guest emitter, any other host emitter or guest emitter so the phosphorescence luminescent layer 14 of present embodiment does not need to mix again broken away from the yoke of the design of traditional phosphorescence host and guest doped system widely.Thus, not only can avoid the generation of concentration quenching effect, more can exempt traditionally the difficulty in process degree that is faced when common evaporation process with complexity forms the luminescent layer of host and guest's doped system, it is many to simplify technology, and can save production cost.
Embodiment two
Please refer to Fig. 3, it illustrates is flow chart according to the organic electroluminescent element of embodiments of the invention two.Please also refer to Fig. 1, at first in step 21, provide a substrate 11.Then, enter in the step 22, form an anode 12 on substrate 11.Then, enter in the step 23, form a hole injection layer 18 on anode 12.Then, enter in the step 24, form a hole transmission layer 15 on hole injection layer 18.Then, enter in the step 25, form a phosphorescence luminescent layer 14 on hole transmission layer 15.Wherein, phosphorescence luminescent layer 14 is made of a luminescent material with octahedral structure.This luminescent material concentration in phosphorescence luminescent layer 14 with octahedral structure is 100%, do not need mix host emitter and guest emitter in the expression phosphorescence luminescent layer 14, can phosphoresce, break away from the yoke of the design of the phosphorescence luminescent layer in traditional phosphorescence host and guest doped system widely.
Then, enter in the step 26, form a hole blocking layer 16 on phosphorescence luminescent layer 14.Then, enter in the step 27, form an electron transfer layer 17 on hole blocking layer 16.Then, enter in the step 28, form an electron injecting layer 19 on electron transfer layer 17.Then, form a negative electrode 13 on electron injecting layer 19, therefore, organic electroluminescent element 10 is accused eventually and is finished.
The above-mentioned luminescent material with octahedral structure is represented with chemical formula [I]:
Wherein, " M " be that atomic number is basically greater than 40 metallic atom; can allow this luminescent material launch visible phosphorescence with octahedral structure, " Q1 " reach " Q2 " be identical or different two chelating substituting groups, " S1 " reach " S2 " be identical or different single chelating substituting group.In addition, " M " be selected from osmium (osmium, Os), rubidium (rubidium, Rb), ruthenium (ruthenium, Ru), iridium (iridium, Ir), platinum (platinum, Pt), rhenium (rhenium, Re), thallium (thallium, T1), palladium (palladium, Pb) or rhodium (rhodium, Rh).In addition, the luminescent material with octahedral structure of present embodiment is represented with chemical formula [II]:
Right present embodiment the technical staff in the technical field can also understand that the technology of present embodiment is not confined to this, for example, when hole blocking layer has the function of above-mentioned electron transfer layer concurrently, also can omit above-mentioned step 27, need in dynamo-electric exciting light element, not form electron transfer layer.
Embodiment three
Please refer to Fig. 4, it illustrates is schematic diagram according to the flat display apparatus of the organic electroluminescent element of application the foregoing descriptions of embodiments of the invention three.At this, flat display apparatus for example is a flat-panel screens 70, and it comprises computer screen, flat-surface television and monitoring screen.In the present embodiment, flat-panel screens 70 for example is a computer screen.
In Fig. 4, flat display apparatus 70 comprises a casing 71 and a display floater 72, and display floater 72 comprises above-mentioned organic electroluminescent element 10 at least, and is arranged in the casing 71.In addition, the viewing area of display floater 72 is exposed to the external world through the front openings 71a of casing 71.
Embodiment four
Please refer to Fig. 5, it illustrates is schematic diagram according to the flat display apparatus of the organic electroluminescent element of application the foregoing descriptions of embodiments of the invention four.At this, flat display apparatus for example is a mobile display device 80, it comprises mobile phone, hand held game device, digital camera (digital camera, DC), digital Video Camera (digital video, DV), digital broadcast device, personal digital assistant (personal digital assistant, PDA), mobile computer (notebook) and tablet computer (Table PC).In the present embodiment, mobile display device 80 for example is a mobile phone.
In Fig. 5, mobile display device 80 comprises a casing 81, a display floater 82 and a key groups 83, and display floater 82 comprises above-mentioned organic electroluminescent element 10 at least, and is arranged in the casing 81.In addition, the front openings 81a that the viewing area of display floater 82 sees through casing 81 is exposed to the external world, and key groups 83 is arranged on the front of casing 81, and is positioned at a side of display floater 81.
In addition, the organic electroluminescent element 10 of present embodiment also can be applicable to need be provided with on any electronic installation of display floater.
Its flat display apparatus of disclosed organic electroluminescent element of the above embodiment of the present invention and manufacture method thereof and application, it constitutes the design of phosphorescence luminescent layer with the luminescent material with octahedral structure, make that the solid resistance barrier of luminescent material of present embodiment is not worse than the planar structure of traditional phosphorescence guest emitter, any other host emitter or guest emitter so present embodiment does not need to mix again broken away from the yoke of the design of traditional phosphorescence host and guest doped system widely.Thus, not only can avoid the generation of concentration quenching effect, also can exempt traditionally the difficulty in process degree that is faced when common evaporation process with complexity forms the luminescent layer of host and guest's doped system, it is many to simplify technology, and can save production cost.Even, the organic electric-excitation luminescent spare of present embodiment more can eliminate effectively in traditional phosphorescent element the delustring mechanism eliminated of the triplet that can face.
In sum; though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; those skilled in the art without departing from the spirit and scope of the present invention; can do a little change and retouching, thus protection scope of the present invention should with accompanying Claim the person of being defined be as the criterion.
Claims (12)
1. organic electroluminescent element comprises:
One substrate;
The negative electrode of one anode and a corresponding setting is arranged on this substrate;
One phosphorescence luminescent layer is arranged between this anode and this negative electrode, and this phosphorescence luminescent layer is made of a luminescent material with octahedral structure;
One hole transmission layer is arranged between this anode and this phosphorescence luminescent layer; And
One hole blocking layer is arranged between this phosphorescence luminescent layer and this negative electrode.
2. organic electroluminescent element as claimed in claim 1 also comprises:
One electron transfer layer is arranged between this hole blocking layer and this negative electrode.
3. organic electroluminescent element as claimed in claim 1 also comprises:
One hole injection layer is arranged between this hole transmission layer and this anode; And
One electron injecting layer is arranged between this hole blocking layer and this negative electrode.
4. organic electroluminescent element as claimed in claim 1, wherein, this luminescent material with octahedral structure is represented with chemical formula [I]:
Wherein, " M " be atomic number greater than 40 metallic atom, and it is selected from osmium, ruthenium, iridium, platinum, rhenium, thallium, palladium or rhodium, " Q1 " reach " Q2 " be identical or different two chelating substituting groups, " S1 " reach " S2 " be identical or different single chelating substituting group.
5. a flat display apparatus comprises organic electroluminescent element as claimed in claim 1.
6. flat display apparatus as claimed in claim 5, wherein, this flat display apparatus comprises a mobile display device or a flat-panel screens.
7. flat display apparatus as claimed in claim 6, wherein, this flat-panel screens comprises computer screen, flat-surface television, monitoring screen or car mo(u)ld top half screen.
8. flat display apparatus as claimed in claim 6, wherein, this mobile display device comprises mobile phone, hand held game device, digital camera, digital Video Camera, digital broadcast device, personal digital assistant, mobile computer or tablet computer.
9. the manufacture method of an organic electroluminescent element comprises:
One substrate is provided;
Form the negative electrode of an anode and a corresponding setting, on this substrate;
Form a phosphorescence luminescent layer, between this anode and this negative electrode, and this phosphorescence luminescent layer is made of a luminescent material with octahedral structure;
Form a hole transmission layer, between this anode and this phosphorescence luminescent layer; And
Form a hole blocking layer, between this phosphorescence luminescent layer and this negative electrode.
10. manufacture method as claimed in claim 9 also comprises:
Form an electron transfer layer, between this hole blocking layer and this negative electrode.
11. manufacture method as claimed in claim 9 also comprises:
Form a hole injection layer, between this hole transmission layer and this anode; And
Form an electron injecting layer, between this hole blocking layer and this negative electrode.
12. manufacture method as claimed in claim 9, wherein, this luminescent material with octahedral structure is represented with chemical formula [I]:
Wherein, " M " be atomic number greater than 40 metallic atom, and be selected from osmium, ruthenium, iridium, platinum, rhenium, thallium, palladium or rhodium, " Q1 " reach " Q2 " be identical or different two chelating substituting groups, " S1 " reach " S2 " be identical or different single chelating substituting group.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030017361A1 (en) * | 1998-09-14 | 2003-01-23 | Thompson Mark E. | Organometallic complexes as phosphorescent emitters in organic LEDs |
| CN1405267A (en) * | 2002-10-28 | 2003-03-26 | 中国科学院长春应用化学研究所 | Method for preparing organic phosporescence material |
| CN1413426A (en) * | 1999-12-01 | 2003-04-23 | 普林斯顿大学理事会 | Complexes of form L2MX as phosphorescent dopants for organic LEDS |
| CN1414062A (en) * | 2002-09-23 | 2003-04-30 | 清华大学 | Electroluminescent phosphorescence material and its application |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030017361A1 (en) * | 1998-09-14 | 2003-01-23 | Thompson Mark E. | Organometallic complexes as phosphorescent emitters in organic LEDs |
| CN1413426A (en) * | 1999-12-01 | 2003-04-23 | 普林斯顿大学理事会 | Complexes of form L2MX as phosphorescent dopants for organic LEDS |
| CN1414062A (en) * | 2002-09-23 | 2003-04-30 | 清华大学 | Electroluminescent phosphorescence material and its application |
| CN1405267A (en) * | 2002-10-28 | 2003-03-26 | 中国科学院长春应用化学研究所 | Method for preparing organic phosporescence material |
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