CN108878504A - OLED display substrate and display device - Google Patents
OLED display substrate and display device Download PDFInfo
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- CN108878504A CN108878504A CN201810846778.2A CN201810846778A CN108878504A CN 108878504 A CN108878504 A CN 108878504A CN 201810846778 A CN201810846778 A CN 201810846778A CN 108878504 A CN108878504 A CN 108878504A
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- 239000000758 substrate Substances 0.000 title claims abstract description 76
- 238000004020 luminiscence type Methods 0.000 claims abstract description 83
- 230000001105 regulatory effect Effects 0.000 claims abstract description 33
- 230000010355 oscillation Effects 0.000 claims abstract description 7
- 239000002096 quantum dot Substances 0.000 claims description 23
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 claims description 3
- 229910001195 gallium oxide Inorganic materials 0.000 claims description 3
- 229910000449 hafnium oxide Inorganic materials 0.000 claims description 3
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 158
- 230000000694 effects Effects 0.000 description 11
- 230000005284 excitation Effects 0.000 description 7
- 239000010408 film Substances 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
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- 239000003086 colorant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 241001062009 Indigofera Species 0.000 description 2
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- 230000002708 enhancing effect Effects 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012044 organic layer Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 description 1
- GRPQBOKWXNIQMF-UHFFFAOYSA-N indium(3+) oxygen(2-) tin(4+) Chemical compound [Sn+4].[O-2].[In+3] GRPQBOKWXNIQMF-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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- Electroluminescent Light Sources (AREA)
Abstract
The present invention provides a kind of oled display substrate and display devices, belong to field of display technology.Wherein, oled display substrate, including the multiple luminescence units being located on underlay substrate, each luminescence unit includes the reflective layer stacked gradually, microcavity thickness regulating course, light transmissive anode layer, first colour light emitting layer, charge generation layer, second colour light emitting layer, reflective cathode layer, micro-cavity structure is formed between the reflective layer and the reflective cathode layer, the thickness of the micro-cavity structure is adjusted by the microcavity thickness regulating course, multiple oscillation occurs in the micro-cavity structure and is emitted the light of wavelength corresponding with the thickness of the micro-cavity structure for the light that the first colour light emitting layer and the second colour light emitting layer issue, the first colour light emitting layer and the second colour light emitting layer choosing are from Yellow light emitting layer and blue light-emitting.According to the technical solution of the present invention, the high colour gamut and high-luminous-efficiency of oled display substrate can be taken into account.
Description
Technical field
The present invention relates to field of display technology, a kind of oled display substrate and display device are particularly related to.
Background technique
White light OLED (organic electroluminescent LED) technology is at low cost, the response time is short, brightness is high, driving voltage
It is low and can realize the advantages such as flexible light source, it has been successfully applied in the display fields such as smart phone, TV at present.Commonly
Multi-luminescent layer white light OLED is mixed into white light by the monochromatic light that different luminescent layers emits, by adjusting the thickness of each luminescent layer
Degree and doping concentration can effectively adjusting means excitation purity.
White light OLED device prevailing design approach has blue light-emitting layer+Yellow luminous layer and blue light-emitting layer+green at present
Two kinds of luminescent layer+red light emitting layer, wherein the luminous efficiency of blue light-emitting layer+Yellow luminous layer structure is high, and brightness is high, still
Since the yellow light that Yellow luminous layer issues is higher than the fluorescence intensity for the blue light that blue light-emitting layer issues, blue light-emitting layer+Huang
The mixed white light out of color luminescent layer generally is warm white, and colour gamut is than blue light-emitting layer+green light emitting layer+red light emitting layer
The gamut differences for the white light that structure is issued.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of oled display substrate and display devices, and it is aobvious can to take into account OLED
Show the high colour gamut and high-luminous-efficiency of substrate.
In order to solve the above technical problems, the embodiment of the present invention offer technical solution is as follows：
On the one hand, a kind of oled display substrate is provided, it is each described including the multiple luminescence units being located on underlay substrate
Luminescence unit includes the reflective layer stacked gradually, microcavity thickness regulating course, light transmissive anode layer, the first colour light emitting layer, charge production
Generating layer, the second colour light emitting layer, reflective cathode layer, form micro-cavity structure between the reflective layer and the reflective cathode layer, institute
The thickness for stating micro-cavity structure is adjusted by the microcavity thickness regulating course, the first colour light emitting layer and second colour light emitting
Multiple oscillation occurs in the micro-cavity structure and is emitted wavelength corresponding with the thickness of the micro-cavity structure for the light that layer issues
Light, the first colour light emitting layer and the second colour light emitting layer choosing are from Yellow light emitting layer and blue light-emitting.
Further, the luminescence unit includes the first luminescence unit, and the microcavity thickness of first luminescence unit is adjusted
Layer with a thickness of 1-10nm so that first luminescence unit is emitted blue light.
Further, the oled display substrate further includes：
Positioned at the blue light filter unit of the first luminescence unit light emission side.
Further, the oled display substrate further includes：
Positioned at the red quantum dot element of the first luminescence unit light emission side, the red quantum dot element is in the lining
Orthographic projection on substrate is not overlapped with orthographic projection of the blue light filter unit on the underlay substrate.
Further, the luminescence unit includes the second luminescence unit, and the microcavity thickness of second luminescence unit is adjusted
Layer with a thickness of 50-60nm so that second luminescence unit is emitted green light.
Further, the oled display substrate further includes：
Positioned at the green light filter unit of the second luminescence unit light emission side.
Further, the oled display substrate further includes：
Positioned at the red quantum dot element of the second luminescence unit light emission side, the red quantum dot element is in the lining
Orthographic projection on substrate is not overlapped with orthographic projection of the green light filter unit on the underlay substrate.
Further, the reflective layer uses Al.
Further, the microcavity thickness regulating course uses silica, silicon nitride, silicon oxynitride, hafnium oxide, indium oxide
Tin, gallium oxide zinc, zinc oxide and indium zinc oxide are any one or more of.
The embodiment of the invention also provides a kind of display devices, including oled display substrate as described above.
The embodiment of the present invention has the advantages that：
In above scheme, the first colour light emitting layer and the second colour light emitting layer choosing from Yellow light emitting layer and blue light-emitting,
It is thereby achieved that higher luminous efficiency；In addition, forming micro-cavity structure between reflective layer and reflective cathode layer, pass through microcavity
The thickness of the adjustable micro-cavity structure of thickness regulating course, so that the light that the first colour light emitting layer and the second colour light emitting layer issue exists
Multiple oscillation occurs in micro-cavity structure and is emitted the light of wavelength corresponding with the thickness of micro-cavity structure, can by micro-cavity structure come
The emission peak of Yellow light emitting layer and blue light-emitting is controlled, the color for the light that blue light-emitting layer+Yellow luminous layer is issued is adjusted,
To adjust the colour gamut of oled display substrate ejecting white light, the high colour gamut of oled display substrate ejecting white light is realized, and then realize
Take into account the high colour gamut and high-luminous-efficiency of oled display substrate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing oled display substrate；
Fig. 2 is the structural schematic diagram of one embodiment of the invention oled display substrate；
Fig. 3 is the structural schematic diagram of another embodiment of the present invention oled display substrate.
Appended drawing reference
1 underlay substrate
2 anode layers
3 blue light-emittings
4 charge generation layers
5 Yellow light emitting layers
6 cathode layers
7 thinner package film layers
8 filter layers
81 green light filter units
82 feux rouges filter units
83 blue light filter units
9 reflective layers
101 first microcavity thickness regulating courses
21 first anode layers
31 first blue light-emittings
41 first charge generation layers
51 first Yellow light emitting layers
61 first cathode layers
71 the first film encapsulated layers
111 green light filter units
112 red quantum dot elements
113 blue light filter units
102 second microcavity thickness regulating courses
22 second plate layers
32 second blue light-emittings
42 second charge generation layers
52 second Yellow light emitting layers
62 second cathode layers
72 second thin-film encapsulation layers
Specific embodiment
To keep the embodiment of the present invention technical problems to be solved, technical solution and advantage clearer, below in conjunction with
Drawings and the specific embodiments are described in detail.
As shown in Figure 1, existing oled display substrate includes multiple luminescence units and covering hair on underlay substrate 1
The thinner package film layer 7 of light unit, each luminescence unit include that the anode layer 2, blue light-emitting 3, charge being cascading produce
Generating layer 4, Yellow light emitting layer 5, cathode layer 6, blue light-emitting 3 and Yellow light emitting layer 5 respectively include the hole stacked gradually injection
Layer, hole transmission layer, organic luminous layer, electron transfer layer, electron injecting layer.In addition it is additionally provided in the light emission side of luminescence unit
Filter layer 8, filter layer 8 include green light filter unit 81, feux rouges filter unit 82 and blue light filter unit 83, Yellow light emitting layer 5
Mixed white light is emitted the light of different colours through filter layer 8 with blue light-emitting 3.The hair of Yellow light emitting layer 5 and blue light-emitting 3
Light efficiency is high, and brightness is high, but Yellow light emitting layer 5 and the mixed white light out of blue light-emitting 3 generally are warm white, colour gamut
Than the gamut differences for the white light that blue light-emitting layer+green light emitting layer+red light emitting layer structure is issued, limit colour gamut can only also be done
To 70%~80%.
The embodiment of the present invention can be taken into account in view of the above-mentioned problems, provide a kind of oled display substrate and display device
The high colour gamut and high-luminous-efficiency of oled display substrate.
The embodiment of the present invention provides a kind of oled display substrate, including the multiple luminescence units being located on underlay substrate, often
One luminescence unit include the reflective layer stacked gradually, microcavity thickness regulating course, light transmissive anode layer, the first colour light emitting layer,
Charge generation layer, the second colour light emitting layer, reflective cathode layer form microcavity knot between the reflective layer and the reflective cathode layer
The thickness of structure, the micro-cavity structure is adjusted by the microcavity thickness regulating course, the first colour light emitting layer and second face
Multiple oscillation occurs in the micro-cavity structure and is emitted corresponding with the thickness of the micro-cavity structure for the light that color luminescent layer issues
The light of wavelength, the first colour light emitting layer and the second colour light emitting layer choosing are from Yellow light emitting layer and blue light-emitting.
Microcavity effect is the method that colour gamut is improved under the premise of one kind does not damage brightness and luminous efficiency, and optical microcavity is one
Kind size is in the optical resonator of micron dimension or sub-micrometer scale, it is using light on the discontinuous interface of refractive index
The effects such as reflection, total reflection, scattering or diffraction, light is limited in the microcavity of OLED device, only the light ability of special wavelength
It can launch, therefore, microcavity effect has the function of enhancing the light of a certain wavelength while restraining the light outgoing of other wavelength, from
And enhance and narrow the light of specific wavelength.
In the present embodiment, the first colour light emitting layer and the second colour light emitting layer choosing from Yellow light emitting layer and blue light-emitting,
It is thereby achieved that higher luminous efficiency；In addition, forming micro-cavity structure between reflective layer and reflective cathode layer, pass through microcavity
The thickness of the adjustable micro-cavity structure of thickness regulating course, so that the light that the first colour light emitting layer and the second colour light emitting layer issue exists
Multiple oscillation occurs in micro-cavity structure and is emitted the light of wavelength corresponding with the thickness of micro-cavity structure, can by micro-cavity structure come
The emission peak of Yellow light emitting layer and blue light-emitting is controlled, the color for the light that blue light-emitting layer+Yellow luminous layer is issued is adjusted,
To adjust the colour gamut of oled display substrate ejecting white light, the high colour gamut of oled display substrate ejecting white light is realized, and then realize
Take into account the high colour gamut and high-luminous-efficiency of oled display substrate.
Further, the luminescence unit includes the first luminescence unit, and the microcavity thickness of first luminescence unit is adjusted
Layer with a thickness of 1-10nm so that first luminescence unit is emitted blue light.
Further, the oled display substrate further includes：
Positioned at the blue light filter unit of the first luminescence unit light emission side, first can be filtered out using blue light filter unit
The light for other colors that luminescence unit issues, so that the first luminescence unit is only emitted blue light.
Further, the oled display substrate further includes：
Positioned at the red quantum dot element of the first luminescence unit light emission side, the red quantum dot element is in the lining
Orthographic projection on substrate is not overlapped with orthographic projection of the blue light filter unit on the underlay substrate, red quantum dot list
Member issues feux rouges under the excitation for the blue light that the first luminescence unit is emitted.
Quantum dot is some extremely small semiconductor nanocrystals, and fluorescent nano material referred to as of new generation has
The excellent characteristics such as luminescent color is adjustable with change in size, phototransformation efficiency is high, emission spectrum half-peak width, the quantum dot of high wavelength
Material can be excited by the light of low wavelength, to issue bright-coloured R (red), G (green), B (blue) color, quantum dot will
The light of low wavelength is converted into the light of high wavelength, rather than sponges, to improve luminous efficiency, and quantum dot is issued
Half-peak width can show higher colour gamut, restore the more true world.
Further, the luminescence unit includes the second luminescence unit, and the microcavity thickness of second luminescence unit is adjusted
Layer with a thickness of 50-60nm so that second luminescence unit is emitted green light.
Further, the oled display substrate further includes：
Positioned at the green light filter unit of the second luminescence unit light emission side, second can be filtered out using green light filter unit
The light for other colors that luminescence unit issues, so that the second luminescence unit is only emitted green light.
Further, the oled display substrate further includes：
Positioned at the red quantum dot element of the second luminescence unit light emission side, the red quantum dot element is in the lining
Orthographic projection on substrate is not overlapped with orthographic projection of the green light filter unit on the underlay substrate, red quantum dot list
Member issues feux rouges under the excitation for the green light that the second luminescence unit is emitted.
Specifically, the reflective layer can use Al, and certainly, reflective layer is not limited to that it can also be used using Al
He is capable of reflecting light the material of line.
Further, the microcavity thickness regulating course can use silica, silicon nitride, silicon oxynitride, hafnium oxide, oxidation
Indium tin, gallium oxide zinc, zinc oxide and indium zinc oxide are any one or more of.
In the present embodiment, distinguished by the thickness change of microcavity thickness regulating course the first luminescence unit micro-cavity structure and
The micro-cavity structure of second luminescence unit, wherein the micro-cavity structure of the first luminescence unit and the second luminescence unit must satisfy, there are one
A phase difference δ, and make microcavity thickness regulating course thickness matching phase difference δ, the first luminescence unit could be made to issue blue light, the
Two luminescence units issue green light, and wherein δ=d1-d2,2j (λ/2)=2nd, d=j (λ/2n), d are each luminescent layers in microcavity
Distance (the namely thickness of luminescent layer organic layer apart from mirror surface between) of the resonant check point apart from mirror surface, j is
Integer, n are the refractive index of organic layer, and λ is to shine peak-to-peak value (optical wavelength), have many altogether for the light of fixed wave length λ
Vibration enhancing point, it is exactly phase difference δ that wherein the d1 of green light, which subtracts the d2 of blue light, can be counted by green luminescence peak and blue light emitting peak
Phase difference δ needed for calculating, the specific film thickness of microcavity thickness regulating course can be the integral multiple of phase difference, can be according to phase
The thickness of difference two microcavity thickness regulating courses of corresponding adjustment, so that two luminescence units can resonate week in same microcavity
It phase, can also be in different microcavity resonance cycles.
In one specific embodiment, as shown in Fig. 2, oled display substrate includes the first luminous list on underlay substrate 1
Member and the second luminescence unit, the first luminescence unit include the reflective layer 9 stacked gradually on underlay substrate 1, the first microcavity thickness
Spend regulating course 101, first anode layer 21, the first blue light-emitting 31, the first charge generation layer 41, the first Yellow light emitting layer 51,
First cathode layer 61, under the electric field action between the first cathode layer 61 and first anode layer 21,51 He of the first Yellow light emitting layer
First blue light-emitting 31 issues yellow light and blue light respectively, by controlling the thickness of the first microcavity thickness regulating course 101, Ke Yila
The light path of long blue light and yellow light manufactures the optical path difference of blue light and yellow light, matches the phase difference of microcavity effect, so that first is luminous single
Member has strong microcavity (strong cavity) effect, and enhance yellow light goes out light, and makes yellow emission peak to green emission peak position
Blue shift (near 525nm) is set, so that the first luminescence unit is emitted green light；First is additionally provided in the light emission side of the first luminescence unit
Thin-film encapsulation layer 71 and green light filter unit 111 and red quantum dot element 112, the light that the first luminescence unit issues is through green
Only green light after light filter unit 111；The light excitation red quantum dot element 112 that first luminescence unit issues issues feux rouges,
The green light of part high-energy is converted into the feux rouges of narrow emission peak, emission effciency may be up to 90% or more, Fwhm (half-peak breadth)<
20nm, energy loss is low in excitation process, can obtain efficient, high-purity feux rouges.Second luminescence unit includes being located at lining
Reflective layer 9, the second microcavity thickness regulating course 102, second plate layer 22, the second blue light-emitting stacked gradually on substrate 1
32, the second charge generation layer 42, the second Yellow light emitting layer 52, the second cathode layer 62, the thickness of the second microcavity thickness regulating course 102
Less than the thickness of the first microcavity thickness regulating course 101, under the electric field action between the second cathode layer 62 and second plate layer 22,
Second Yellow light emitting layer 52 and the second blue light-emitting 32 issue yellow light and blue light respectively, are adjusted by the second microcavity thickness of control
The thickness of layer 102 can elongate the light path of blue light and yellow light, manufacture the optical path difference of blue light and yellow light, match the phase of microcavity effect
Potential difference, so that the second luminescence unit has strong microcavity effect, enhance blue light goes out light, so that the second luminescence unit is emitted blue light；
It is additionally provided with the second thin-film encapsulation layer 72 and blue light filter unit 113 in the light emission side of the second luminescence unit, second is luminous single
The light that member issues is through the only blue light after blue light filter unit 113；Pass through the first luminescence unit and the second luminescence unit in this way
The blue light of high transmittance and the green light of high color purity and feux rouges can be obtained, high colour gamut, high brightness, high-incidence light efficiency are finally mixed into
The white light of rate.
In another specific embodiment, as shown in figure 3, oled display substrate includes that first be located on underlay substrate 1 shines
Unit and the second luminescence unit, the first luminescence unit include reflective layer 9, the first microcavity stacked gradually on underlay substrate 1
Thickness regulating course 101, first anode layer 21, the first blue light-emitting 31, the first charge generation layer 41, the first Yellow light emitting layer
51, the first cathode layer 61, under the electric field action between the first cathode layer 61 and first anode layer 21, the first Yellow light emitting layer 51
Yellow light and blue light are issued respectively with the first blue light-emitting 31, it, can be with by controlling the thickness of the first microcavity thickness regulating course 101
The light path of blue light and yellow light is elongated, the optical path difference of blue light and yellow light is manufactured, matches the phase difference of microcavity effect, so that first shines
Unit has strong microcavity effect, and enhance yellow light goes out light, and makes yellow emission peak to green emission peak position (near 525nm)
Blue shift, so that the first luminescence unit is emitted green light；The first film encapsulated layer 71 is additionally provided in the light emission side of the first luminescence unit
And green light filter unit 111, the light that the first luminescence unit issues is through the only green light after green light filter unit 111；Second
Luminescence unit includes reflective layer 9, the second microcavity thickness regulating course 102, second plate layer stacked gradually on underlay substrate 1
22, the second blue light-emitting 32, the second charge generation layer 42, the second Yellow light emitting layer 52, the second cathode layer 62, the second microcavity are thick
Thickness of the thickness less than the first microcavity thickness regulating course 101 for spending regulating course 102, in the second cathode layer 62 and second plate layer 22
Between electric field action under, the second Yellow light emitting layer 52 and the second blue light-emitting 32 issue yellow light and blue light respectively, pass through control
The thickness for making the second microcavity thickness regulating course 102 can elongate the light path of blue light and yellow light, manufacture the light path of blue light and yellow light
Difference matches the phase difference of microcavity effect, so that the second luminescence unit has strong microcavity effect, enhance blue light goes out light, so that the
Two luminescence units are emitted blue light；The second thin-film encapsulation layer 72 is additionally provided in the light emission side of the second luminescence unit and blue light filters
Unit 113 and red quantum dot element 112, the light that the second luminescence unit issues is through the only indigo plant after blue light filter unit 113
Light, the light excitation red quantum dot element 112 that the second luminescence unit issues issue feux rouges, the blue light of part high-energy are converted into
The feux rouges of narrow emission peak, emission effciency may be up to 90% or more, Fwhm (half-peak breadth)<20nm, energy loss is low in excitation process,
It can obtain efficient, high-purity feux rouges.High transmission can be obtained by the first luminescence unit and the second luminescence unit in this way
The blue light of rate and the green light of high color purity and feux rouges, be finally mixed into high colour gamut, high brightness, high-luminous-efficiency white light.
The embodiment of the invention also provides a kind of display devices, including oled display substrate as described above.The display
Device can be：Any products or components having a display function such as TV, display, Digital Frame, mobile phone, tablet computer,
Wherein, the display device further includes flexible circuit board, printed circuit board and backboard.
In the display device of the present embodiment, the first colour light emitting layer and the second colour light emitting layer choosing are from Yellow light emitting layer and indigo plant
Light luminescent layer, it is thereby achieved that higher luminous efficiency；In addition, micro-cavity structure is formed between reflective layer and reflective cathode layer,
By the thickness of the adjustable micro-cavity structure of microcavity thickness regulating course, so that the first colour light emitting layer and the second colour light emitting layer hair
Multiple oscillation occurs in micro-cavity structure and is emitted the light of wavelength corresponding with the thickness of micro-cavity structure for light out, can be by micro-
Cavity configuration controls the emission peak of Yellow light emitting layer and blue light-emitting, adjusts blue light-emitting layer+Yellow luminous layer and is issued
The color of light realizes the high colour gamut of oled display substrate ejecting white light to adjust the colour gamut of oled display substrate ejecting white light,
And then realize the high colour gamut and high-luminous-efficiency for taking into account oled display substrate.
Unless otherwise defined, the technical term or scientific term that the disclosure uses should be tool in fields of the present invention
The ordinary meaning for thering is the personage of general technical ability to be understood." first ", " second " used in the disclosure and similar word are simultaneously
Any sequence, quantity or importance are not indicated, and are used only to distinguish different component parts." comprising " or "comprising" etc.
Similar word means that the element or object before the word occur covers the element or object for appearing in the word presented hereinafter
And its it is equivalent, and it is not excluded for other elements or object.The similar word such as " connection " or " connected " is not limited to physics
Or mechanical connection, but may include electrical connection, it is either direct or indirectly."upper", "lower",
"left", "right" etc. is only used for indicating relative positional relationship, and after the absolute position for being described object changes, then the relative position is closed
System may also correspondingly change.
It is appreciated that ought such as layer, film, region or substrate etc element be referred to as be located at another element "above" or "below"
When, which " direct " can be located at "above" or "below" another element, or may exist intermediary element.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of oled display substrate, which is characterized in that including the multiple luminescence units being located on underlay substrate, each hair
Light unit includes the reflective layer stacked gradually, microcavity thickness regulating course, light transmissive anode layer, the first colour light emitting layer, charge generation
Layer, the second colour light emitting layer, reflective cathode layer, form micro-cavity structure between the reflective layer and the reflective cathode layer, described
The thickness of micro-cavity structure is adjusted by the microcavity thickness regulating course, the first colour light emitting layer and the second colour light emitting layer
Multiple oscillation occurs in the micro-cavity structure and is emitted the light of wavelength corresponding with the thickness of the micro-cavity structure for the light of sending,
The first colour light emitting layer and the second colour light emitting layer choosing are from Yellow light emitting layer and blue light-emitting.
2. oled display substrate according to claim 1, which is characterized in that the luminescence unit includes first luminous single
Member, the microcavity thickness regulating course of first luminescence unit with a thickness of 1-10nm so that first luminescence unit outgoing is blue
Light.
3. oled display substrate according to claim 2, which is characterized in that the oled display substrate further includes：
Positioned at the blue light filter unit of the first luminescence unit light emission side.
4. oled display substrate according to claim 3, which is characterized in that the oled display substrate further includes：
Positioned at the red quantum dot element of the first luminescence unit light emission side, the red quantum dot element is in the substrate base
Orthographic projection on plate is not overlapped with orthographic projection of the blue light filter unit on the underlay substrate.
5. oled display substrate according to claim 1, which is characterized in that the luminescence unit includes second luminous single
Member, the microcavity thickness regulating course of second luminescence unit with a thickness of 50-60nm so that second luminescence unit outgoing is green
Light.
6. oled display substrate according to claim 5, which is characterized in that the oled display substrate further includes：
Positioned at the green light filter unit of the second luminescence unit light emission side.
7. oled display substrate according to claim 6, which is characterized in that the oled display substrate further includes：
Positioned at the red quantum dot element of the second luminescence unit light emission side, the red quantum dot element is in the substrate base
Orthographic projection on plate is not overlapped with orthographic projection of the green light filter unit on the underlay substrate.
8. oled display substrate according to claim 1, which is characterized in that the reflective layer uses Al.
9. oled display substrate according to claim 1, which is characterized in that the microcavity thickness regulating course is using oxidation
Any one of silicon, silicon nitride, silicon oxynitride, hafnium oxide, tin indium oxide, gallium oxide zinc, zinc oxide and indium zinc oxide are more
Kind.
10. a kind of display device, which is characterized in that including oled display substrate as claimed in any one of claims 1-9 wherein.
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| CN201810846778.2A CN108878504A (en) | 2018-07-27 | 2018-07-27 | OLED display substrate and display device |
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Application publication date: 20181123 |