CN109713161A - Organic light emitting display panel and preparation method thereof, organic light-emitting display device - Google Patents
Organic light emitting display panel and preparation method thereof, organic light-emitting display device Download PDFInfo
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Abstract
The invention discloses a kind of organic light emitting display panel and preparation method thereof, organic light-emitting display device, organic light emitting display panel includes the cathode being stacked, first medium layer, second dielectric layer, light emitting functional layer, third dielectric layer, anode and at least one auxiliary cathode between first medium layer and second dielectric layer.Anode is electrically connected with the first power signal line, and cathode and auxiliary cathode are electrically connected with second source signal wire, and the level value of power supply signal is greater than the level value of power supply signal on second source signal wire on the first power signal line.According to the technical solution of the present invention, increase the quantity of the electronics generated in organic light-emitting structure, and then increase the quantity for reaching the electronics of light emitting functional layer, so that the photon numbers that light emitting functional layer generates increase, be conducive to the luminous efficiency for improving organic light-emitting structure and the service life of organic light emitting display panel.
Description
Technical field
The present embodiments relate to field of display technology more particularly to a kind of organic light emitting display panel and its production sides
Method, organic light-emitting display device.
Background technique
OLED, i.e. Organic Light Emitting Diode (Organic Light-Emitting Diode), also known as organic electroluminescence hair
Optical device, OLED have gradually been occupied in small size display field due to the advantages that frivolous, bent, high contrast, wide colour gamut
One seat.Its basic structure includes the anode, cathode and the hair between anode and cathode of corresponding each pixel region
Light functional layer, when voltage is applied in anode and cathode, hole and electronics are moved to light emitting functional layer, and the two is in luminous function
Compound in ergosphere, the exciton in light emitting functional layer moves to ground state by excitation state and shines.
The electronics that the cathode of organic light emitting display panel generates is limited by material potential barrier during transmission, is caused
Electronics is constantly lost in transmission process, so that the electronics for reaching light emitting functional layer is less, influences the hair of organic light-emitting structure
The service life of light efficiency and organic light emitting display panel.
Summary of the invention
The present invention provides a kind of organic light emitting display panel and preparation method thereof, organic light-emitting display device, has increased
The quantity of the electronics generated in machine light emitting structure is conducive to the luminous efficiency and organic light emitting display that improve organic light-emitting structure
The service life of panel.
In a first aspect, the embodiment of the invention provides a kind of organic light emitting display panels, comprising:
Cathode, first medium layer, second dielectric layer, light emitting functional layer, third dielectric layer, anode and the position being stacked
At least one auxiliary cathode between the first medium layer and the second dielectric layer；
The anode is electrically connected with the first power signal line, and the cathode and the auxiliary cathode are believed with second source
The electrical connection of number line, the level value of power supply signal is greater than power supply letter on the second source signal wire on first power signal line
Number level value.
Further, the first medium layer includes at least the first electron injecting layer, and the second dielectric layer includes at least
Electron transfer layer, the energy level of the auxiliary cathode is between the energy level of first electron injecting layer and the energy of the electron transfer layer
Between grade.
Further, the energy level of the auxiliary cathode is more than or equal to 2.9eV, is less than or equal to 3.65eV.
Further, the material for constituting the auxiliary cathode is metal material or metal oxide materials, it is preferable that structure
One or more of uranium, cadmium or tin indium oxide are selected from the material of the auxiliary cathode.
Further, the second dielectric layer further includes the second electron injecting layer, second electron injecting layer with it is described
Auxiliary cathode contact setting.
Further, the material for constituting first electron injecting layer is metal material and/or metal oxide materials, structure
Material at second electron injecting layer is metal material and/or metal oxide materials.
Further, the material for constituting the cathode includes magnesium and silver, and magnesium and Ag doping form the cathode, the cathode
The doping ratio of middle magnesium and silver is more than or equal to 1:8, is less than or equal to 1:3.
Second aspect, the embodiment of the invention also provides a kind of systems of organic light emitting display panel as described in relation to the first aspect
Make method, comprising:
Form anode, third dielectric layer, light emitting functional layer and the second dielectric layer；
Form auxiliary cathode；
Form first medium layer and cathode.
Further, the material for constituting the auxiliary cathode is cadmium, further includes to institute after the formation auxiliary cathode
It states auxiliary cathode and carries out heating treatment, the temperature of the heating treatment is more than or equal to 280 DEG C, is less than or equal to 450 DEG C；Alternatively,
The material for constituting the auxiliary cathode is tin indium oxide, further includes to described auxiliary after the formation auxiliary cathode
Cathode is helped to carry out heating treatment, the temperature of the heating treatment is more than or equal to 300 DEG C, is less than or equal to 380 DEG C.
The third aspect, present invention implementation additionally provides a kind of organic light-emitting display device, including having described in first aspect
Machine light emitting display panel
The embodiment of the invention provides a kind of organic light emitting display panel and preparation method thereof, organic light-emitting display device,
Organic light emitting display panel includes the cathode being stacked, first medium layer, second dielectric layer, light emitting functional layer, third medium
Layer, anode and at least one auxiliary cathode between first medium layer and second dielectric layer.Anode and the first power supply are believed
The electrical connection of number line, cathode and auxiliary cathode are electrically connected with second source signal wire, power supply signal on the first power signal line
Level value be greater than second source signal wire on power supply signal level value, utilize the auxiliary being electrically connected with second source signal wire
Cathode increases the quantity of the electronics generated in organic light-emitting structure, be conducive to improve organic light-emitting structure luminous efficiency and
The service life of organic light emitting display panel.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is a kind of overlooking structure diagram of organic light emitting display panel provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of organic light emitting display panel provided in an embodiment of the present invention；
Fig. 3 is a kind of flow diagram of the production method of organic light emitting display panel provided in an embodiment of the present invention；
Fig. 4 is the corresponding the schematic diagram of the section structure of step S110；
Fig. 5 is the corresponding the schematic diagram of the section structure of step S120；
Fig. 6 is the corresponding the schematic diagram of the section structure of step S130；
Fig. 7 is the corresponding the schematic diagram of the section structure of step S140；
Fig. 8 is the corresponding the schematic diagram of the section structure of step S150；
Fig. 9 is the corresponding the schematic diagram of the section structure of step S160；
Figure 10 is the corresponding the schematic diagram of the section structure of step S170；
Figure 11 is a kind of structural schematic diagram of organic light-emitting display device provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.It is same or similar in this specification
Drawing reference numeral represent the same or similar structure, element or process.It should be noted that in the absence of conflict, this Shen
Please in embodiment and embodiment in feature can be combined with each other.
The embodiment of the invention provides a kind of organic light emitting display panel, organic light emitting display panel includes being stacked
Cathode, first medium layer, second dielectric layer, light emitting functional layer, third dielectric layer, anode and be located at first medium layer and second
At least one auxiliary cathode between dielectric layer.Anode is electrically connected with the first power signal line, cathode and auxiliary cathode with
Second source signal wire is electrically connected, and the level value of power supply signal is greater than power supply on second source signal wire on the first power signal line
The level value of signal.
The electronics that the cathode of organic light emitting display panel generates is limited by material potential barrier during transmission, is caused
Electronics is constantly lost in transmission process, so that the electronics for reaching light emitting functional layer is less, influences the hair of organic light-emitting structure
The service life of light efficiency and organic light emitting display panel.
Organic light emitting display panel provided in an embodiment of the present invention includes the cathode being stacked, first medium layer, second
Dielectric layer, light emitting functional layer, third dielectric layer, anode and at least one between first medium layer and second dielectric layer
Auxiliary cathode.Anode is electrically connected with the first power signal line, and cathode and auxiliary cathode are electrically connected with second source signal wire,
The level value of power supply signal is greater than the level value of power supply signal on second source signal wire on first power signal line, using with the
The auxiliary cathode of two power signal lines electrical connection increases the quantity of the electronics generated in organic light-emitting structure, and being conducive to improve has
The luminous efficiency of machine light emitting structure and the service life of organic light emitting display panel.
It is core of the invention thought above, following will be combined with the drawings in the embodiments of the present invention, to the embodiment of the present invention
In technical solution be clearly and completely described.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Under the premise of making creative work, every other embodiment obtained be shall fall within the protection scope of the present invention.
Fig. 1 is a kind of overlooking structure diagram of organic light emitting display panel provided in an embodiment of the present invention, and Fig. 2 is this hair
A kind of energy diagram for organic light emitting display panel that bright embodiment provides.Organic light emitting display panel includes combined with Figure 1 and Figure 2,
The cathode 10 that is stacked, first medium layer 21, second dielectric layer 22, light emitting functional layer 4, third dielectric layer 23, anode 1 and
At least one auxiliary cathode 8 between first medium layer 21 and second dielectric layer 22, Fig. 1 and Fig. 2 are illustratively arranged
It include an auxiliary cathode 8 between one dielectric layer 21 and second dielectric layer 22.Anode 1 is electrically connected with the first power signal line 11,
Cathode 10 and auxiliary cathode 8 are electrically connected with second source signal wire 12, the electricity of power supply signal on the first power signal line 11
Level values are greater than the level value of power supply signal on second source signal wire 12, and Fig. 2 illustratively illustrates the first power supply with battery symbol
The level value of power supply signal is greater than the level value of power supply signal on second source signal wire 12 on signal wire 11, so that cathode 10
And the electronics that auxiliary cathode 8 generates is moved to anode 1.
In order to promote the luminous efficiency of organic light emitting display panel, organic light-emitting structure in organic light emitting display panel by
Initial three-layered node fruit develops into the structure of more layers, and since the function of different film layers is different, the material that different film layers use is not
Together, there are certain potential barrier between different material and material, the electronics that cathode generates is in transmission process because the potential barrier encountered hinders
Hinder so that electronics is constantly lost, the electronics for reaching light emitting functional layer is less, and the photon that light emitting functional layer generates is less, influences organic
The luminous efficiency of light emitting display panel and the service life of organic light emitting display panel.For another angle, work as light-emitting function
When the photon that actually generates is less in layer, the identical luminous efficiency of situation is not reduced with photon numbers in order to reach, need to promote biography
The voltage of organic light-emitting structure is transported to, but the voltage for being transmitted to organic light-emitting structure is bigger, the load of organic light-emitting structure itself
Bigger, the easy burn-outs such as route connecting with organic light-emitting structure lead to organic light emitting display panel service life reduction, indirectly say
The photon that light emitting functional layer generates is illustrated will affect the luminous efficiency and organic light emitting display panel of organic light emission result less
Service life.
The embodiment of the present invention includes the cathode 10 being stacked, first medium layer by setting organic light emitting display panel
21, second dielectric layer 22, light emitting functional layer 4, third dielectric layer 23, anode 1 and be located at first medium layer 21 and second medium
At least one auxiliary cathode 8 between layer 22, anode 1 are electrically connected with the first power signal line 11, cathode 10 and auxiliary cathode 8
It is electrically connected with second source signal wire 12, the level value of power supply signal is greater than second source signal on the first power signal line 11
The level value of power supply signal on line 12 increases organic light emission using the auxiliary cathode 8 being electrically connected with second source signal wire 12
The structure that electronics is generated in structure A, that is, increase the quantity of the electronics generated in organic light-emitting structure A, and then increase arrival
The quantity of the electronics of light emitting functional layer 4 is conducive to improve organic light emission so that the photon numbers that light emitting functional layer 4 generates increase
The luminous efficiency of structure A and the service life of organic light emitting display panel.
First medium layer 21 can be set combined with Figure 1 and Figure 2, including at least the first electron injecting layer 9, second dielectric layer 22
Including at least electron transfer layer 6, the energy level of auxiliary cathode 8 is between the energy level of the first electron injecting layer 9 and the energy of electron transfer layer 6
Between grade.
Illustratively, the energy level that auxiliary cathode 8 can be set is more than or equal to 2.9eV, is less than or equal to 3.65eV, and setting is constituted
The material of auxiliary cathode 8 is selected from one or more of uranium, cadmium or tin indium oxide.Specifically, electron transfer layer 6 can be set
Energy level be equal to 2.9eV, the energy level of the first electron injecting layer 9 is equal to 3.65eV, and the energy level of setting auxiliary cathode 8 is more than or equal to
2.9eV is less than or equal to 3.65eV, it can so that the energy level of auxiliary cathode 8 is between the first electron injecting layer 9 and electron transfer layer
Between 6.The energy level of auxiliary cathode 8 is set between the first electron injecting layer 9 and electron transfer layer 6, enhances the first electronics
The progressive property of energy level between implanted layer 9 and electron transfer layer 6, electronics pass through step by step the first electron injecting layer 9, auxiliary cathode 8 with
And electron transfer layer 6 reduces electron-transport relative to what electronics was directly transmitted to electron transfer layer 6 from the first electron injecting layer 9
Difficulty, be conducive to improve reach light emitting functional layer 4 electronics quantity, increase light emitting functional layer 4 generate photon numbers, mention
The luminous efficiency of high organic light-emitting structure A and the service life of organic light emitting display panel.
It further includes the second electron injecting layer 7, the second electron injecting layer that second dielectric layer 22 can be set combined with Figure 1 and Figure 2,
7 contact setting with auxiliary cathode 8, and can be set and constitute the material of the first electron injecting layer 9 is that metal material and/or metal aoxidize
Object material, the material for constituting the second electron injecting layer 7 is metal material and/or metal oxide materials.If adjacent film layers use
Material it is different, relative to adjacent film layers using material similar in identical or property, be unfavorable for realizing between film layer and fit closely,
Can be set and constitute the material of cathode 10, the first electron injecting layer 9, auxiliary cathode 8 and the second electron injecting layer 7 includes gold
Belong to material or including metal oxide materials, is conducive to cathode 10, the first electron injecting layer 9, auxiliary cathode 8 and the second electricity
Adjacent film layers fit closely in sub- implanted layer 7, improve the film forming stability of film layer in organic light-emitting structure A.
Illustratively, the energy level that auxiliary cathode 8 can be set is infused between the energy level of the first electron injecting layer 9 and the second electronics
Between the energy level for entering layer 7, the energy level of the second electron injecting layer 7 between auxiliary cathode 8 energy level and electron transfer layer 6 energy level it
Between, to enhance the progressive property of energy level, be conducive to the quantity for improving the electronics for reaching light emitting functional layer 4, increase light emitting functional layer 4 and produce
Raw photon numbers improve the luminous efficiency of organic light-emitting structure A and the service life of organic light emitting display panel.
Illustratively, can be set and constitute the material of cathode 10 includes magnesium and silver, and magnesium and Ag doping form cathode 10, cathode
The doping ratio of magnesium and silver is more than or equal to 1:8 in 10, is less than or equal to 1:3, preferably 1:4 or 1:6.Specifically, organic light-emitting structure A
Anode 1 and cathode 10 between each film layer constitute micro-cavity structure, micro-cavity structure can use light on the discontinuous boundary of refractive index
The effects such as reflection, total reflection, interference, diffraction or scattering on face, light are limited in the wavelength region of a very little.Work as cathode
10 as reflecting electrode when, the main function of the silver in cathode 10 is auxiliary reflection, and cathode 10 needs for half-transmitting and half-reflecting
Film layer, silver-colored content is excessive or the very few reflection characteristic that will affect cathode 10 causes influence in micro-cavity structure the refraction of light with
Reflection process.
It includes silver film and ITO (tin indium oxide) film layer that anode 1 can be set combined with Figure 1 and Figure 2, and sun also can be set
Pole 1 only includes ito film layer.When organic light emitting display panel is top emitting device, the thickness of silver film in anode 1 can be set
More than or equal to 98nm, it is less than or equal to 102nm, preferably 100nm, the thickness of silver film is too small in anode 1 is unfavorable for improving anode 1
The top light emitting of reflecting properties, organic light emitting display panel is insufficient；The thickness of silver film is excessive so that 1 resistance of anode in anode 1
Increase, also increases the power consumption of organic light emitting display panel.When organic light emitting display panel is bottom emitting device, Ke Yishe
The thickness for setting silver film in anode 1 is more than or equal to 15nm, is less than or equal to 23nm, and the thickness of silver film is too small in anode 1 is unfavorable for
The homogeneity that anode 1 forms a film；The excessive transmitance for making light of the thickness of silver film reduces in anode 1, is unfavorable for improving organic
The luminous efficiency of light-emitting component.
It should be noted that the embodiment of the present invention is not construed as limiting composition anode 1 and the metal material of cathode 10, setting sun
Pole 1 uses the metal material of high work function, and cathode 10 uses the metal material of low work function.
Third dielectric layer 23 may include closing on the hole injection layer 2 of the setting of anode 1 and closing on hair combined with Figure 1 and Figure 2,
3 second dielectric layer 22 of hole transmission layer that light functional layer 4 is arranged can also include being located at light emitting functional layer 4 and electron transfer layer 6
Between hole blocking layer 5, hole blocking layer 5 can effectively prevent electronics or the hole not composite guide in light emitting functional layer 4
The carrier of cause is directly transferred to anode 1 by cathode 10 or is directly transferred to cathode 10 by anode 1, causes organic light-emitting structure
The problem that A does not shine or instant transient is luminous.The energy level that cathode 10 can be set to film layer between anode 1 changes step by step, with
Enhance cathode 10 to the progressive property of energy level between anode 1, is conducive to the quantity for improving the electronics for reaching light emitting functional layer 4, increases
The photon numbers that light emitting functional layer 4 generates improve the luminous efficiency of organic light-emitting structure A and the longevity of organic light emitting display panel
Life.
It should be noted that the embodiment of the present invention shows that attached drawing is only exemplary the size for indicating each film layer and structure,
The actual size of each film layer and structure in organic light emitting display panel is not represented.
Organic light emitting display panel provided in an embodiment of the present invention includes the cathode being stacked, first medium layer, second
Dielectric layer, light emitting functional layer, third dielectric layer, anode and at least one between first medium layer and second dielectric layer
Auxiliary cathode.Anode is electrically connected with the first power signal line, and cathode and auxiliary cathode are electrically connected with second source signal wire,
The level value of power supply signal is greater than the level value of power supply signal on second source signal wire on first power signal line, using with the
The auxiliary cathode of two power signal lines electrical connection increases the structure that electronics is generated in organic light-emitting structure, that is, increases organic hair
The quantity of the electronics generated in photo structure, and then the quantity for reaching the electronics of light emitting functional layer is increased, so that light emitting functional layer
The photon numbers of generation increase, and are conducive to the luminous efficiency for improving organic light-emitting structure and the longevity of organic light emitting display panel
Life.
Fig. 3 is a kind of flow diagram of the production method of organic light emitting display panel provided in an embodiment of the present invention.Such as
Shown in Fig. 3, the production method of organic light emitting display panel includes:
S110, anode is formed.
Fig. 4 is the corresponding the schematic diagram of the section structure of step S110.As shown in figure 4, can be initially formed to form substrate 100,
The anode 1 of organic illuminating element is formed on substrate 100, substrate 100, which can be, is provided with the organic hair of driving in organic illuminating element
The array substrate 100 of transistor and capacitance structure in the luminous pixel circuit of optical element.
S120, third dielectric layer is formed.
Fig. 5 is the corresponding the schematic diagram of the section structure of step S120.As shown in figure 5, third dielectric layer 23 may include being located at
The hole injection layer 2 and hole transmission layer 3 set gradually on anode 1.
S130, light emitting functional layer is formed.
Fig. 6 is the corresponding the schematic diagram of the section structure of step S130.It shines as shown in fig. 6, being formed on third dielectric layer 23
Functional layer 4, light emitting functional layer 4 may include emitting red light functional layer, green emitting functional layer and blue-light-emitting functional layer.
S140, second dielectric layer is formed.
Fig. 7 is the corresponding the schematic diagram of the section structure of step S140.It is situated between as shown in fig. 7, forming second in light emitting functional layer 4
Matter layer 22, second dielectric layer 22 may include the hole blocking layer 5 set gradually in light emitting functional layer 4 and the second electronics note
Enter layer 7.
S150, auxiliary cathode is formed.
Fig. 8 is the corresponding the schematic diagram of the section structure of step S150.As shown in figure 8, forming auxiliary in second dielectric layer 22
Cathode 8 can carry out heating treatment to auxiliary cathode after forming auxiliary cathode 8.Illustratively, composition auxiliary can be set
The material of cathode 8 is cadmium, and the temperature of heating treatment is more than or equal to 280 DEG C, is less than or equal to 450 DEG C, does not carry out the cadmium of heating treatment
Energy level be 4.07eV, the energy level of cadmium after carrying out heating treatment is reduced to 3.58eV, energy of the energy level between electron transfer layer 6
Between the grade 2.9eV and energy level 3.65eV of the first electron injecting layer 9, be conducive to enhance the first electron injecting layer 9 and electron-transport
The progressive property of energy level between layer 6, improves the quantity for reaching the electronics of light emitting functional layer 4, increases the photon that light emitting functional layer 4 generates
Quantity improves the luminous efficiency of organic light-emitting structure A and the service life of organic light emitting display panel.
Likewise, the material that composition auxiliary cathode 8 also can be set is tin indium oxide, the temperature of heating treatment is more than or equal to
300 DEG C, it is less than or equal to 380 DEG C, the energy level for not carrying out the tin indium oxide of heating treatment is 4.0eV, the cadmium after carrying out heating treatment
Energy level be reduced to 2.9eV to 3.2eV, energy level 2.9eV and first electron injecting layer 9 of the energy level between electron transfer layer 6
Between energy level 3.65eV, it is equally beneficial for the progressive property of energy level between the first electron injecting layer 9 of enhancing and electron transfer layer 6, is mentioned
Height reaches the quantity of the electronics of light emitting functional layer 4, increases the photon numbers that light emitting functional layer 4 generates, and improves organic light-emitting structure A
Luminous efficiency and organic light emitting display panel service life.It is uranium alternatively, it is also possible to which the material of composition auxiliary cathode 8 is arranged,
The material is equal to 3.6eV without carrying out heating treatment, energy level, infuses between the energy level 2.9eV of electron transfer layer 6 and the first electronics
Enter between the energy level 3.65eV of layer 9.
S160, first medium layer is formed.
Fig. 9 is the corresponding the schematic diagram of the section structure of step S160.As shown in figure 9, forming first medium in auxiliary cathode 8
Layer 21, first medium layer 21 may include the first electron injecting layer 9.
S170, cathode is formed.
Figure 10 is the corresponding the schematic diagram of the section structure of step S170.As shown in Figure 10, yin is formed on first medium layer 21
Pole 10.
A kind of organic light-emitting display device that the embodiment of the present invention also provides, Figure 11 are one kind provided in an embodiment of the present invention
The structural schematic diagram of organic light-emitting display device.As shown in figure 11, organic light-emitting display device 91 includes in above-described embodiment
Organic light emitting display panel 92, therefore organic light-emitting display device provided in an embodiment of the present invention 91 also has in above-described embodiment
Described beneficial effect, details are not described herein again.Illustratively, organic light-emitting display device can be mobile phone terminal, plate electricity
The electronic equipments such as brain or display device for mounting on vehicle, the embodiment of the present invention are not construed as limiting the concrete form of organic light-emitting display device.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments here, be able to carry out for a person skilled in the art it is various it is apparent variation, again
Adjustment and substitution are without departing from protection scope of the present invention.Therefore, although by above embodiments to the present invention carried out compared with
For detailed description, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, can be with
Including more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of organic light emitting display panel characterized by comprising
The cathode that is stacked, first medium layer, second dielectric layer, light emitting functional layer, third dielectric layer, anode and it is located at institute
State at least one auxiliary cathode between first medium layer and the second dielectric layer；
The anode is electrically connected with the first power signal line, the cathode and the auxiliary cathode with second source signal wire
It is electrically connected, the level value of power supply signal is greater than power supply signal on the second source signal wire on first power signal line
Level value.
2. organic light emitting display panel according to claim 1, which is characterized in that the first medium layer includes at least the
One electron injecting layer, the second dielectric layer include at least electron transfer layer, and the energy level of the auxiliary cathode is between described first
Between the energy level of electron injecting layer and the energy level of the electron transfer layer.
3. organic light emitting display panel according to claim 2, which is characterized in that the energy level of the auxiliary cathode be greater than etc.
In 2.9eV, it is less than or equal to 3.65eV.
4. organic light emitting display panel according to claim 3, which is characterized in that the material for constituting the auxiliary cathode is
Metal material or metal oxide materials, it is preferable that the material for constituting the auxiliary cathode is selected from uranium, cadmium or tin indium oxide
One or more of.
5. organic light emitting display panel according to claim 2, which is characterized in that the second dielectric layer further includes second
Electron injecting layer, second electron injecting layer contact setting with the auxiliary cathode.
6. organic light emitting display panel according to claim 5, which is characterized in that constitute first electron injecting layer
Material is metal material and/or metal oxide materials, constitute second electron injecting layer material be metal material and/or
Metal oxide materials.
7. organic light emitting display panel according to claim 1, which is characterized in that the material for constituting the cathode includes magnesium
And silver, magnesium and Ag doping form the cathode, and the doping ratio of magnesium and silver is more than or equal to 1:8 in the cathode, it is less than or equal to 1:
3。
8. a kind of production method of such as described in any item organic light emitting display panels of claim 1-7, which is characterized in that packet
It includes:
Form anode, third dielectric layer, light emitting functional layer and the second dielectric layer；
Form auxiliary cathode；
Form first medium layer and cathode.
9. production method according to claim 8, which is characterized in that the material for constituting the auxiliary cathode is cadmium, in institute
Stating further includes carrying out heating treatment to the auxiliary cathode after forming auxiliary cathode, and the temperature of the heating treatment is more than or equal to
280 DEG C, it is less than or equal to 450 DEG C；Alternatively,
The material for constituting the auxiliary cathode is tin indium oxide, further includes to the auxiliary yin after the formation auxiliary cathode
Pole carries out heating treatment, and the temperature of the heating treatment is more than or equal to 300 DEG C, is less than or equal to 380 DEG C.
10. a kind of organic light-emitting display device, which is characterized in that aobvious including the described in any item organic light emissions of claim 1-7
Show panel.
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| CN108520889A (en) * | 2018-04-10 | 2018-09-11 | 上海天马有机发光显示技术有限公司 | Organic light emitting display panel and its display device |
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