CN107565037B - A kind of organic luminescent device and organic light-emitting display device - Google Patents
A kind of organic luminescent device and organic light-emitting display device Download PDFInfo
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Abstract
The invention discloses a kind of organic luminescent device and organic light-emitting display devices, belong to field of display technology, comprising: the anode layer and cathode layer being oppositely arranged；Red emitting layers, for red emitting layers between anode layer and cathode layer, red emitting layers include red emitting material；Green-emitting layer, for Green-emitting layer between anode layer and cathode layer, Green-emitting layer includes green light luminescent material；Blue-light emitting layer, for blue-light emitting layer between anode layer and cathode layer, blue-light emitting layer includes blue light emitting material；Charge generation layer, charge generation layer are located at any between the two in red emitting layers, Green-emitting layer and blue-light emitting layer；Wherein, at least one of red emitting layers and Green-emitting layer further include doped luminescent material.For the prior art, in the case where not increasing power consumption, luminous efficiency height and the preferable white organic light emitting device of white balance can be obtained.
Description
Technical field
The present invention relates to field of display technology, fill more particularly, to a kind of organic luminescent device and organic light emitting display
It sets.
Background technique
With the development of display technology, Organic Light Emitting Diode (Organic Light-Emitting Diode) is gradually answered
For in display device, becoming the display technology of a new generation.
The basic structure of Organic Light Emitting Diode generally includes: between anode, cathode and clamping setting anode and cathode
Luminous material layer.When supplying power to appropriate voltage, the hole of anode and the charge of cathode combine in luminous material layer,
Material in excitation light-emitting material layer generates light, to make organic light-emitting diode.According to material in luminous material layer
Difference, Organic Light Emitting Diode can issue the light of the multiple colors such as red, green or blue.
The Organic Light Emitting Diode and Organic Light Emitting Diode hair of white light can be emitted in order to obtain white balance preferably
Light out can adequately cover entire visible spectrum, and the prior art provides a kind of Organic Light Emitting Diode, referring to FIG. 1,
The Organic Light Emitting Diode that the prior art provides includes anode 01, cathode 02, and red hair is provided between anode 01 and cathode 02
Optical material layer 03, green luminescent material layer 04, blue emitting material layer 05, wherein red illuminating material layer 03 can issue red
Light, green luminescent material layer 04 can issue green light, and blue emitting material layer 05 can issue blue light, feux rouges, green light and blue light
As the three primary colors of light, white light can be obtained after mixing.
Fluorescence and phosphorescence can be divided into according to the property that luminous material layer shines, when chemical molecular is excited by extraneous energy
Afterwards, if electron spin (Electron Spin) and ground state electron are pairs of, for singlet state (Singlet), the light discharged is
So-called fluorescence (Fluorescence)；Conversely, if excitation state electronics and ground state electron spin be not pairs of and parallel, referred to as three
Weight state (Triplet), the light discharged are so-called phosphorescence (Phosphorescence).In the prior art, blue-light-emitting material
Fluorescent material is used in the bed of material 05, red illuminating material layer 03 and green luminescent material layer 04 use phosphor material.Phosphor material
Luminous efficiency it is more much higher than fluorescent material, cause Organic Light Emitting Diode to be not readily available the preferable white light of white balance.
A kind of solution that the prior art provides is that red illuminating material layer 03 and green luminescent material layer 04 do not use
Phosphor material moves back and asks secondary and use fluorescent material.But this will lead to the white light low efficiency of Organic Light Emitting Diode entirety, increase
Power consumption.
Summary of the invention
In view of this, the present invention provides a kind of organic luminescent device and organic light-emitting display devices.
The present invention provides a kind of organic luminescent devices, comprising: the anode layer and cathode layer being oppositely arranged；Red emission
Layer, for red emitting layers between anode layer and cathode layer, red emitting layers include red emitting material；Green-emitting layer is green
For light-emitting layer between anode layer and cathode layer, Green-emitting layer includes green light luminescent material；Blue-light emitting layer, blue emission
For layer between anode layer and cathode layer, blue-light emitting layer includes blue light emitting material；Charge generation layer, charge generation layer are located at
It is any between the two in red emitting layers, Green-emitting layer and blue-light emitting layer；Wherein, red emitting layers and Green-emitting layer
At least one of further include doped luminescent material.
In some alternative embodiments, the luminous efficiency of blue light emitting material is less than the luminous effect of red emitting material
Rate, the luminous efficiency of blue light emitting material are less than the luminous efficiency of green light luminescent material；The luminous efficiency of doped luminescent material is small
In the luminous efficiency of red emitting material, and the luminous efficiency of doped luminescent material is less than the luminous effect of green light luminescent material
Rate.
In some alternative embodiments, doped luminescent material is blue light emitting material.
In some alternative embodiments, Green-emitting layer includes the first material of main part, in the first material of main part doped with
Green light luminescent material and blue light emitting material；Wherein, the doping ratio of green light luminescent material is 2%~10%, blue light emitting material
The doping ratio of material is 1%~2%.
In some alternative embodiments, red emitting layers include the second material of main part, in the second material of main part doped with
Red emitting material and blue light emitting material；Wherein, the doping ratio of red emitting material is 2%~10%, blue light emitting material
The doping ratio of material is 1%~2%.
In some alternative embodiments, blue-light emitting layer is located at the side of charge generation layer, red emitting layers and green light
Emission layer is located at the other side of charge generation layer.
In some alternative embodiments, organic luminescent device further includes wall, and wall is arranged in red emitting layers
Between Green-emitting layer.
In some alternative embodiments, the triplet of wall is 2.9eV.
In some alternative embodiments, the material of wall includes bis- (N- carbazole) -1, the 1'- biphenyl of 4,4'-.
In some alternative embodiments, charge generation layer includes hole transmission layer and electron transfer layer.
In some alternative embodiments, the light emission side of organic luminescent device is arranged in anode layer, blue-light emitting layer green
Light-emitting layer is close to the side of anode layer, and side of the red emitting layers close to anode layer is arranged in blue-light emitting layer.
In some alternative embodiments, the light emission side of organic luminescent device is arranged in cathode layer, blue-light emitting layer green
Light-emitting layer is close to the side of cathode layer, and side of the red emitting layers close to cathode layer is arranged in blue-light emitting layer.
The present invention also provides a kind of organic light-emitting display devices, including organic luminescent device provided by the invention.
Compared with prior art, organic luminescent device and organic light-emitting display device of the invention, at least realize as follows
The utility model has the advantages that
In organic luminescent device and organic light-emitting display device provided by the invention, organic luminescent device includes being oppositely arranged
Anode layer and cathode layer, red emitting layers, Green-emitting layer, blue-light emitting layer are provided between anode layer and cathode layer；It is red
Charge generation layer is arbitrarily provided therebetween in light-emitting layer, Green-emitting layer and blue-light emitting layer, charge generation layer will
Red emitting layers, Green-emitting layer and blue-light emitting layer are divided into two luminescence units and are together in series, and make organic luminescent device
With lower operating voltage and higher luminous efficiency.Wherein, at least one of red emitting layers and Green-emitting layer are gone back
Including doped luminescent material, when the luminous efficiency of red emitting material and green light luminescent material is all larger than the hair of blue emitting material
When light efficiency, doped luminescent material can compensate the luminous efficiency of blue emitting material；When red emitting material and green luminescence
When the luminous efficiency of material is respectively less than the luminous efficiency of blue emitting material, doped luminescent material can compensate red emitting material
With the luminous efficiency of at least one of green light luminescent material.It compared with the existing technology, can be in the case where not increasing power consumption
Obtain luminous efficiency height and the preferable white organic light emitting device of white balance.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is a kind of structural schematic diagram for Organic Light Emitting Diode that the prior art provides；
Fig. 2 is a kind of structural schematic diagram of organic luminescent device provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another organic luminescent device provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another organic luminescent device provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of another organic luminescent device provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another organic luminescent device provided in an embodiment of the present invention；
Fig. 7 is a kind of schematic diagram of organic light-emitting display device provided in an embodiment of the present invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
Referring to FIG. 2, Fig. 2 is a kind of structural schematic diagram of organic luminescent device provided in an embodiment of the present invention.The present invention
Provide a kind of organic luminescent device, comprising: the anode layer 10 and cathode layer 20 being oppositely arranged；Red emitting layers 30, feux rouges hair
Layer 30 is penetrated between anode layer 10 and cathode layer 20, red emitting layers 30 include red emitting material；Green-emitting layer 40 is green
For light-emitting layer 40 between anode layer 10 and cathode layer 20, Green-emitting layer 40 includes green light luminescent material；Blue-light emitting layer
50, for blue-light emitting layer 50 between anode layer 10 and cathode layer 20, blue-light emitting layer 50 includes blue light emitting material；Charge produces
Generating layer 60, charge generation layer 60 are located at any the two in red emitting layers 30, Green-emitting layer 40 and blue-light emitting layer 50
Between；Wherein, at least one of red emitting layers 30 and Green-emitting layer 40 further include doped luminescent material.
In organic luminescent device provided in an embodiment of the present invention, including anode layer 10 and cathode layer 20 can optionally make
Use any transparent material with high conductivity as anode layer 10；Low work function metal, alloy, conduction can be used in cathode layer 20
Compound, or the combination including these one or more materials are formed.When anode layer 10 and cathode layer 20 apply respectively it is appropriate
When voltage, red emitting layers 30 can issue feux rouges, and Green-emitting layer 40 can issue green light, and blue-light emitting layer 50 can issue
Blue light, available white light after three kinds of feux rouges, green light and blue light Colored light mixings.
It should be noted that Fig. 2 it is merely exemplary illustrate red emitting layers 30, Green-emitting layer 40 and blue-light emitting layer
The technical solution that 50 threes sequentially form, in other optional implementations, red emitting layers 30, Green-emitting layer 40 and indigo plant
Light-emitting layer 50 can be with the formation of any order.
Organic luminescent device shown in Fig. 2 further includes charge generation layer 60, in Fig. 2, only illustrates charge generation layer 60
Technical solution between Green-emitting layer 40 and blue-light emitting layer 50, it is to be understood that charge generation layer 60 is located at feux rouges
It is any between the two in emission layer 30, Green-emitting layer 40 and blue-light emitting layer 50.
In Fig. 2, illustratively, charge generation layer 60 is by red emitting layers 30, Green-emitting layer 40 and blue-light emitting layer 50
It is divided into two luminescence units, wherein red emitting layers 30 and Green-emitting layer 40 are the first luminescence unit, blue-light emitting layer 50
For the second luminescence unit, the first luminescence unit and the second luminescence unit are connected by charge generation layer 60.It is known, it is sent out when two
When light unit is connected by charge generation layer 60, the efficiency of the electric current generated in two luminescence units is doubled, and makes organic illuminator
Part has lower operating voltage and higher luminous efficiency.Charge generation layer 60 includes p type semiconductor layer and N-type semiconductor
Layer, contacts with each other to form PN junction, which is connected under the action of positive field, so that p type semiconductor layer therebetween
Hole is provided for its adjacent luminescent layer, n type semiconductor layer provides electronics for its adjacent luminescent layer, is conducive to carrier generation
And transmission.In organic luminescent device provided in an embodiment of the present invention, red emitting layers 30 include red emitting material, green emission
Layer 40 includes green light luminescent material, and blue-light emitting layer 50 includes blue light emitting material.The luminous effect of the luminescent material of various colors
Rate has differences, in general, be easier to obtain red emitting material and green light luminescent material similar in luminous efficiency, and blue is sent out
The luminous efficiency of luminescent material and red emitting material and green light luminescent material differ greatly.
In the present embodiment, it is provided at least one of red emitting layers 30 and Green-emitting layer 40 and adulterates the material that shines
Material.Wherein, it includes three kinds of realities that doped luminescent material is arranged at least one of red emitting layers 30 and Green-emitting layer 40
A mode is applied, the first embodiment is that doped luminescent material only is arranged in red emitting layers 30；Second of embodiment
It is that doped luminescent material only is set in Green-emitting layer 40；The third embodiment is to be arranged in red emitting layers 30 and mix
Miscellaneous luminescent material, and doped luminescent material is set in Green-emitting layer 40.
Currently, blue emitting material is compared to red illuminating material and green luminescent material, luminous efficiency and luminous longevity
The decline of life at any time is very fast, therefore, in the use process of organic luminescent device, it is possible that blue light decaying is too fast and makes
Distortion the phenomenon that, in organic luminescent device provided in this embodiment, when red emitting material and green light luminescent material
When luminous efficiency is all larger than the luminous efficiency of blue emitting material, adulterated in red emitting material and/or green light luminescent material
When the light that luminescent material, the preferably doped luminescent material issue is blue, blue light can be compensated with the decaying of time, make to have
Machine luminescent device issues the preferable white light of white balance；In addition, if working as the luminous efficiency of red emitting material and green light luminescent material
Respectively less than the luminous efficiency of blue emitting material when, doped luminescent material can compensate red emitting material and green light luminescent material
At least one of luminous efficiency, make organic luminescent device issue the preferable white light of white balance.
In organic luminescent device provided in an embodiment of the present invention, organic luminescent device includes the anode layer and yin being oppositely arranged
Pole layer, is provided with red emitting layers, Green-emitting layer, blue-light emitting layer between anode layer and cathode layer；Red emitting layers, green light
Charge generation layer arbitrarily is provided therebetween in emission layer and blue-light emitting layer, charge generation layer is by red emitting layers, green
Light-emitting layer and blue-light emitting layer are divided into two luminescence units and are together in series, and organic luminescent device is made to have lower work
Voltage and higher luminous efficiency.Wherein, at least one of red emitting layers and Green-emitting layer further include adulterating luminous material
Material, when the luminous efficiency of red emitting material and green light luminescent material is all larger than the luminous efficiency of blue emitting material, doping
Luminescent material can compensate the luminous efficiency of blue emitting material；When the luminous efficiency of red emitting material and green light luminescent material
Respectively less than the luminous efficiency of blue emitting material when, doped luminescent material can compensate red emitting material and green light luminescent material
At least one of luminous efficiency.Compared with the existing technology, in the case where not increasing power consumption, luminous efficiency can be obtained
The high and preferable white organic light emitting device of white balance.
In some optional implementations, red emitting layers 30, Green-emitting layer 40, blue-light emitting layer 50 and charge are produced
There are many stacking orders of generating layer 60, for example, referring to FIG. 3, in organic luminescent device shown in Fig. 3, including what is be oppositely arranged
Anode layer 10 and cathode layer 20, wherein blue-light emitting layer 50, charge generation layer 60, Green-emitting layer 40 and red emitting layers 30
Stack gradually setting；For example, referring to FIG. 4, in organic luminescent device shown in Fig. 4, including 10 He of anode layer being oppositely arranged
Cathode layer 20, wherein blue-light emitting layer 50, charge generation layer 60, red emitting layers 30 and Green-emitting layer 40 are stacked gradually and set
It sets；For example, referring to FIG. 5, in organic luminescent device shown in fig. 5, including the anode layer 10 and cathode layer 20 being oppositely arranged,
In, blue-light emitting layer 50, red emitting layers 30, charge generation layer 60 and Green-emitting layer 40 stack gradually setting.Fig. 3, Fig. 4 and
In organic luminescent device shown in fig. 5, at least one of red emitting layers 30 and Green-emitting layer 40 further include that doping shines
Material in the case where not increasing power consumption, can obtain luminous efficiency height and white balance is preferably white compared with the existing technology
Light organic luminescent device.It is understood that red emitting layers 30, Green-emitting layer 40, blue-light emitting layer 50 and charge generate
There are many stacking orders of layer 60, and only need to meet charge generation layer 60 is located at red emitting layers 30, Green-emitting layer 40 and blue light
Any between the two in emission layer 50, the present invention will not enumerate explanation herein.
In some alternative embodiments, please continue to refer to Fig. 2.The luminous efficiency of blue light emitting material is less than red light-emitting
The luminous efficiency of material, the luminous efficiency of blue light emitting material are less than the luminous efficiency of green light luminescent material；Doped luminescent material
Luminous efficiency be less than red emitting material luminous efficiency, and the luminous efficiency of doped luminescent material be less than green luminescence material
The luminous efficiency of material.Currently, blue light emitting material uses fluorescent material, red in the technology of the organic luminescent device of comparative maturity
Light luminescent material and green light luminescent material use phosphor material.The luminous efficiency of phosphor material is more much higher than fluorescent material, leads
Organic luminescent device is caused to be not readily available the preferable white light of white balance.In the present embodiment, blue light emitting material, red emitting material
In green light luminescent material three, the luminous efficiency of blue light emitting material is minimum；Doped luminescent material, red emitting material and green
In light luminescent material three, the luminous efficiency of doped luminescent material is minimum.By in red emitting material and green light luminescent material
At least one in doped luminescent material is set, the luminous efficiency of blue light emitting material can be compensated.For example, blue light emitting material
Luminous efficiency it is minimum, the photochromic of the spectrum of organic luminescent device is easy partially red or partially green, for partially green spectrum, will adulterate
Luminescent material is doped to Green-emitting layer 40；For partially red spectrum, doped luminescent material is doped in red emitting layers 30.
Compared with the existing technology, in the case where not increasing power consumption, luminous efficiency height can be obtained and the preferable white light of white balance is organic
Luminescent device.
In some alternative embodiments, doped luminescent material is blue light emitting material.Organic hair provided in this embodiment
In optical device, luminescent material more mature at present can be used, as, blue light emitting material uses fluorescent material, feux rouges hair
Luminescent material and green light luminescent material use phosphor material.Wherein, fluorescent material DSA-ph can be used in blue light emitting material, changes
Formula is as follows:
Blue light emitting material can also use fluorescent material pheno yl pyridines beryllium (Be (PP) 2), and chemical formula is as follows:
Blue light emitting material is doped at least one of red emitting layers and Green-emitting layer according to certain proportion,
Without providing additional material, the technical solution of the present embodiment can be realized, obtain luminous efficiency height and white balance is preferably white
Light organic luminescent device, and the type of raw material can be saved, reduce the cost of production organic luminescent device.
In some alternative embodiments, please continue to refer to Fig. 2.Green-emitting layer 40 include the first material of main part, first
Doped with green light luminescent material and blue light emitting material in material of main part；Wherein, the doping ratio of green light luminescent material be 2%~
10%, the doping ratio of blue light emitting material is 1%~2%.In the present embodiment, doped with blue light emitting in Green-emitting layer 40
Material, in order to avoid blue light emitting material capture exciton transfer to green light luminescent material on, the absorption light of green light luminescent material
Compose that (i.e. green light absorption spectrum and blue phosphor spectrum is in the same coordinate system less than 30% with the fluorescence spectrum registration of blue light
The area being overlapped after normalization is less than the 30% of the area of the fluorescence spectrum of blue light).Optionally, blue light emitting material is phosphor
Material, triplet are higher than the triplet of the first material of main part.Energy turns between the luminescent material of high concentration in order to prevent
It moves, in Green-emitting layer 40, blue light emitting material concentration is 1%~2%.
In some alternative embodiments, please continue to refer to Fig. 2.Red emitting layers 30 include the second material of main part, second
Doped with red emitting material and blue light emitting material in material of main part；Wherein, the doping ratio of red emitting material be 2%~
10%, the doping ratio of blue light emitting material is 1%~2%.Optionally, blue light emitting material is fluorescent material, triplet state energy
Grade is higher than the triplet of the second material of main part.Energy transfer between the luminescent material of high concentration in order to prevent, red emission
In layer 30, blue light emitting material concentration is 1%~2%.
In some alternative embodiments, please continue to refer to Fig. 2.Blue-light emitting layer 50 is located at the one of charge generation layer 60
Side, red emitting layers 30 and Green-emitting layer 40 are located at the other side of charge generation layer 60.It is common, the hair of blue light emitting material
Light efficiency will be far below the luminous efficiency of green light luminescent material and red emitting material, therefore generally that blue-light emitting layer 50 is independent
It is placed in a luminescence unit, red emitting layers 30 and Green-emitting layer 40 are placed in another luminescence unit, to be conducive to
The luminous efficiency of blue-light emitting layer 50 is improved, the preferable organic luminescent device of white balance is obtained.
In some alternative embodiments, referring to FIG. 6, Fig. 6 has continued to use the appended drawing reference of Fig. 2, something in common is no longer superfluous
It states, is in place of the difference of Fig. 6 and Fig. 2, organic luminescent device further includes wall 70, and wall 70 is arranged in red emitting layers
Between 30 and Green-emitting layer 40.Since the range of scatter of triplet excitons is big, red emitting layers 30 and Green-emitting layer 40 are not
It preferably directly contacts, is excessively shifted to avoid the energy having between red emitting material and green light luminescent material, and exciton cannot
Confinement causes photochromic to change with voltage change.Red emitting layers 30 and 40 luminescent layer of Green-emitting layer want wall 70 to be isolated
It comes.
In some alternative embodiments, the triplet of wall 70 is 2.9eV.Optionally, Green-emitting layer 40
It include material of main part with red emitting layers 30, doping green luminescent material obtains Green-emitting layer 40 in material of main part,
Red emitting material is adulterated in material of main part obtains red emitting layers 30.The HOMO energy level of wall 70 is between Green-emitting layer 40
Between the HOMO energy level of the material of main part of red emitting layers 30；And the triplet of wall 70 needs to be higher than green light and sends out
Penetrate the triplet of the material of main part of layer 40 and red emitting layers 30.Optionally, the film thickness of wall 70 is between 50A-200A
Between, it is excessively thin, it is not worked due to tunneling effect, it is blocked up, it will increase the operating voltage of organic luminescent device.
In some alternative embodiments, the material of wall 70 includes bis- (N- carbazole) -1, the 1'- biphenyl of 4,4'-
(CBP).Wherein, the chemical formula of bis- (N- carbazole) -1, the 1'- biphenyl of 4,4'- is as follows:
In some alternative embodiments, in the organic luminescent device that any embodiment of the present invention provides, charge generation layer
60 include hole transmission layer (Hole-Transport Layer, abbreviation HTL) and electron transfer layer (Electron
TransportLayer, abbreviation ETL).
In some alternative embodiments, Fig. 3 or Fig. 4 is please referred to.The light emission side of organic luminescent device in anode layer 10,
Green-emitting layer 40 is arranged in close to the side of anode layer 10 in blue-light emitting layer 50, and blue-light emitting layer 50 is arranged in red emission
Layer 30 is close to the side of anode layer 10.In other words, when anode layer 10 is light emission side, blue-light emitting layer 50 is relative to Green-emitting layer
40 and red emitting layers 30 for, be arranged near the position of anode layer 10.The enhancing point of blue-light emitting layer 50 in light emission side,
Therefore blue-light emitting layer 50, which is arranged, can obtain highest luminous efficiency in light emission side.Similarly, the light emission side of organic luminescent device
In cathode layer 20, referring to FIG. 2, Green-emitting layer 40 is arranged in close to the side of cathode layer 20 in blue-light emitting layer 50, and blue
Red emitting layers 30 are arranged in close to the side of cathode layer 20 in light-emitting layer 50.In other words, when cathode layer 20 is light emission side, blue light
Emission layer 50 is arranged in for Green-emitting layer 40 and red emitting layers 30 near the position of cathode layer 20.This reality
The organic luminescent device for applying example offer, can obtain higher luminous efficiency.
Optionally, in the organic luminescent device that any embodiment of the present invention provides, Green-emitting layer 40 includes the first main body
Material, doped with green light luminescent material in the first material of main part；Red emitting layers 30 include the second material of main part, the second main body material
Doped with red emitting material in material；Blue-light emitting layer 50 includes third material of main part, doped with blue light in third material of main part
Luminescent material.Wherein, the first material of main part, the second material of main part are identical with the material of third material of main part, for example, the first main body
Material, the second material of main part and third material of main part can select 1,3-, bis- carbazole -9- base benzene (mCP), and chemical formula is as follows:
Optionally, blue-light emitting layer 50 is with a thickness of 250A, doping concentration of the blue light emitting material in third material of main part
It is 5%.
Optionally, red emitting layers 30 are with a thickness of 200A.Red emitting material includes octaethyl porphines platinum (PtOEP),
Chemical formula is as follows:
Doping concentration of the red emitting material in the second material of main part is 5%.
Optionally, Green-emitting layer 40 is with a thickness of 350A.Green light luminescent material includes that three (2- phenylpyridines) close iridium (Ir
(ppy)3), chemical formula is as follows:
Doping concentration of the green light luminescent material in the second material of main part is 8%.
In the following, the present invention is exemplary herein to provide the comparative example and an implementation of the invention of a prior art
Example, by comparing to illustrate technical effect of the invention.The present invention is only illustrated by taking Fig. 6 as an example herein.Fig. 6 is provided organic
Luminescent device is disposed with red including the anode layer 10 and cathode layer 20 being oppositely arranged between anode layer 10 and cathode layer 20
Light-emitting layer 30, wall 70, Green-emitting layer 40, charge generation layer 60, blue-light emitting layer 50.The embodiment of the present invention and existing
It is in place of the difference for having the comparative example of technology, in the embodiment of the present invention, is doped with blue light emitting in Green-emitting layer 40
Material, the doping ratio of blue light emitting material are 2%.Organic hair that the organic luminescent device and embodiment that comparative example provides provide
For optical device in the case where light emission luminance is 500cd/m2, comparison result asks following table (table 1):
| Voltage (V) | Current efficiency (cd/A) | CIEx, y | |
| Comparative example | 7 | 17 | 0.28,0.56 |
| Embodiment | 6.8 | 20 | 0.35,0.34 |
Table 1
In table 1, the luminous voltage of the embodiment of the present invention is 6.8V, less than the 7V of the comparative example of the prior art, thus this
The organic luminescent device that the embodiment of invention provides only needs lesser driving voltage.The current efficiency of the embodiment of the present invention is
20cd/A, greater than the 17cd/A of comparative example, therefore organic luminescent device provided in an embodiment of the present invention is imitated with higher electric current
Rate.Known, the CIE coordinate of white light is (0.33,0.33), the CIE coordinate of the white light for the organic luminescent device that comparative example provides
For (0.28,0.56), color is obviously partially green, and the CIE coordinate of the white light for the organic luminescent device that the embodiment of the present invention provides is
(0.35,0.34), CIE coordinate of the color very close to white light.Therefore, organic luminescent device provided in an embodiment of the present invention,
In the case where not increasing power consumption, luminous efficiency height and the preferable white organic light emitting device of white balance can be obtained.
The present invention also provides a kind of organic light-emitting display devices, provide including any of the above-described embodiment of the present invention organic
Luminescent device.
Referring to FIG. 7, Fig. 7 is a kind of schematic diagram of organic light-emitting display device provided in an embodiment of the present invention.Fig. 7 is provided
Organic light-emitting display device 100 include organic luminescent device that any of the above-described embodiment of the present invention provides.Fig. 7 embodiment only with
For mobile phone, organic light-emitting display device 100 is illustrated, it is to be understood that organic hair provided in an embodiment of the present invention
Electro-optical display device can be other organic light-emitting display devices having a display function such as computer, TV, display device for mounting on vehicle,
The present invention is not specifically limited this.Organic light-emitting display device provided in an embodiment of the present invention, mentions with the embodiment of the present invention
The beneficial effect of the organic luminescent device of confession, specifically can with reference to the various embodiments described above for organic luminescent device specifically
Bright, details are not described herein for the present embodiment.
It is organic through the foregoing embodiment it is found that in organic luminescent device provided by the invention and organic light-emitting display device
Luminescent device includes the anode layer and cathode layer being oppositely arranged, and red emitting layers, green light are provided between anode layer and cathode layer
Emission layer, blue-light emitting layer；Charge is arbitrarily provided therebetween in red emitting layers, Green-emitting layer and blue-light emitting layer
Red emitting layers, Green-emitting layer and blue-light emitting layer are divided into two luminescence units and connected by generating layer, charge generation layer
Get up, makes organic luminescent device that there is lower operating voltage and higher luminous efficiency.Wherein, red emitting layers and green light hair
Penetrating at least one of layer further includes doped luminescent material, when the luminous efficiency of red emitting material and green light luminescent material is big
When the luminous efficiency of blue emitting material, doped luminescent material can compensate the luminous efficiency of blue emitting material；Work as feux rouges
When the luminous efficiency of luminescent material and green light luminescent material is respectively less than the luminous efficiency of blue emitting material, doped luminescent material can
To compensate the luminous efficiency of at least one of red emitting material and green light luminescent material.Compared with the existing technology, do not increasing
In the case where adding power consumption, luminous efficiency height and the preferable white organic light emitting device of white balance can be obtained.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (12)
1. a kind of organic luminescent device characterized by comprising
The anode layer and cathode layer being oppositely arranged；
Red emitting layers, the red emitting layers are between the anode layer and the cathode layer, the red emitting layers packet
Include red emitting material；
Green-emitting layer, the Green-emitting layer is between the anode layer and the cathode layer, the Green-emitting layer packet
Include green light luminescent material；
Blue-light emitting layer, the blue-light emitting layer is between the anode layer and the cathode layer, the blue-light emitting layer packet
Include blue light emitting material；
Charge generation layer, the charge generation layer are located at the red emitting layers, the Green-emitting layer and the blue emission
It is any between the two in layer；
Wherein, at least one of the red emitting layers and the Green-emitting layer further include the blue light emitting material；
The Green-emitting layer includes the first material of main part, in first material of main part doped with the green light luminescent material and
The blue light emitting material, the triplet of the blue light emitting material are higher than the triplet state energy of first material of main part
Grade, or
The red emitting layers include the second material of main part, in second material of main part doped with the red emitting material and
The blue light emitting material, the triplet of the blue light emitting material are higher than the triplet state energy of second material of main part
Grade；
Wherein, the absorption spectrum of the green light luminescent material is with the fluorescence spectrum registration of blue light less than 30%.
2. organic luminescent device according to claim 1, which is characterized in that the luminous efficiency of the blue light emitting material is small
It is less than the green light luminescent material in the luminous efficiency of the luminous efficiency of the red emitting material, the blue light emitting material
Luminous efficiency.
3. organic luminescent device according to claim 1, which is characterized in that
The doping ratio of the green light luminescent material is 2%~10%, the doping ratio of the blue light emitting material is 1%~
2%.
4. organic luminescent device according to claim 1, which is characterized in that
The doping ratio of the red emitting material is 2%~10%, the doping ratio of the blue light emitting material is 1%~
2%.
5. organic luminescent device according to claim 1, which is characterized in that the blue-light emitting layer is located at charge production
The side of generating layer, the red emitting layers and the Green-emitting layer are located at the other side of the charge generation layer.
6. organic luminescent device according to claim 5, which is characterized in that
The organic luminescent device further includes wall, and the wall is arranged in the red emitting layers and the green emission
Between layer.
7. organic luminescent device according to claim 6, which is characterized in that
The triplet of the wall is 2.9eV.
8. organic luminescent device according to claim 6, which is characterized in that the material of the wall includes 4,4'- bis-
(N- carbazole) -1,1'- biphenyl.
9. organic luminescent device according to claim 1, which is characterized in that the charge generation layer includes hole transmission layer
And electron transfer layer.
10. organic luminescent device according to claim 1, which is characterized in that
The light emission side of the organic luminescent device is arranged in the Green-emitting layer in anode layer, the blue-light emitting layer close to institute
The side of anode layer is stated, and the red emitting layers are arranged in close to the side of the anode layer in the blue-light emitting layer.
11. organic luminescent device according to claim 1, which is characterized in that
The light emission side of the organic luminescent device is arranged in the Green-emitting layer in cathode layer, the blue-light emitting layer close to institute
The side of cathode layer is stated, and the red emitting layers are arranged in close to the side of the cathode layer in the blue-light emitting layer.
12. a kind of organic light-emitting display device, including -11 described in any item organic luminescent devices according to claim 1.
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| CN101055923A (en) * | 2006-04-13 | 2007-10-17 | Lg电子株式会社 | Organic electroluminescence device and method for fabricating the same |
| CN105493307A (en) * | 2015-10-29 | 2016-04-13 | 京东方科技集团股份有限公司 | Organic light emitting diode structure, manufacturing method thereof, and related display panel and display facility |
| CN106024844A (en) * | 2016-07-27 | 2016-10-12 | 京东方科技集团股份有限公司 | Organic light emitting device and preparation method thereof and display device |
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| CN101055923A (en) * | 2006-04-13 | 2007-10-17 | Lg电子株式会社 | Organic electroluminescence device and method for fabricating the same |
| CN105493307A (en) * | 2015-10-29 | 2016-04-13 | 京东方科技集团股份有限公司 | Organic light emitting diode structure, manufacturing method thereof, and related display panel and display facility |
| CN106024844A (en) * | 2016-07-27 | 2016-10-12 | 京东方科技集团股份有限公司 | Organic light emitting device and preparation method thereof and display device |
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