CN110707223A - Light emitting device and display panel - Google Patents
Light emitting device and display panel Download PDFInfo
- Publication number
- CN110707223A CN110707223A CN201910835266.0A CN201910835266A CN110707223A CN 110707223 A CN110707223 A CN 110707223A CN 201910835266 A CN201910835266 A CN 201910835266A CN 110707223 A CN110707223 A CN 110707223A
- Authority
- CN
- China
- Prior art keywords
- light
- emitting
- emitting device
- guest material
- light emitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
Abstract
The invention provides a light-emitting device and a display panel, the light-emitting device comprises a light-emitting layer, the light-emitting layer comprises a plurality of light-emitting units, the light-emitting units comprise a first light-emitting part, and the composition material of the first light-emitting part comprises a first host material and a first guest material; the first main body material has a preset polarity under the action of a preset voltage; the first guest material is used for emitting green light, and when the first host material has the preset polarity, the first guest material absorbs or emits a spectrum, so that the luminescent color of the first guest material is changed from green to blue; the scheme can save the cost of the white OLED light-emitting device so as to promote the further development of the white OLED light-emitting device.
Description
Technical Field
The invention relates to the technical field of display, in particular to a light-emitting device and a display panel.
Background
Currently, three colors of R (Red)/G (Green)/B (Blue) Light Emitting materials are commonly used in a white Light-Emitting OLED (Organic Light-Emitting Diode) Light Emitting device to emit Light together so as to realize the final display of white Light.
However, among the three R/G/B emitting materials, B emitting material has the problems of less kinds, high price and low emitting efficiency, so that the white OLED emitting device has high cost, and the development of the white OLED emitting device is limited.
In summary, there is a need to provide a light emitting device, a display panel and a display apparatus that can solve the problem of high cost of the white OLED light emitting device, so as to promote further development of the white OLED light emitting device.
Disclosure of Invention
The invention aims to provide a light-emitting device and a display panel, wherein the first light-emitting part in the light-emitting device comprises a first host material and a first guest material, and the first host material has a preset polarity under the action of a preset voltage, so that the first guest material absorbs or emits a spectrum, the light-emitting color of the first guest material is changed from green to blue, and the problem of high cost of a white light OLED light-emitting device caused by the reasons of few types of light-emitting materials B, high price and the like in the prior art is solved.
The embodiment of the invention provides a light-emitting device, which comprises a light-emitting layer, wherein the light-emitting layer comprises a plurality of light-emitting units, each light-emitting unit comprises a first light-emitting part, and the composition materials of the first light-emitting part comprise a first host material and a first guest material;
the first main body material has a preset polarity under the action of a preset voltage;
the first guest material is used for emitting green light, and when the first host material has the preset polarity, the first guest material absorbs or emits a spectrum, so that the light emitting color of the first guest material is changed from green to blue.
In one embodiment, the first guest material comprises a thermally activated delayed fluorescence material.
In one embodiment, the thermally activated delayed fluorescence material comprises at least one of DMAC-DPC, BP-DPAC, DPAC-BP-DPAC.
In one embodiment, the first host material comprises tBCzHDPO, and the molecular structural formula of the tBCzHDPO is shown in the specification
In one embodiment, the predetermined voltage is not less than 4V and not more than 8V.
In one embodiment, the predetermined polarity corresponds to a dipole moment not greater than 3.3 debye.
In one embodiment, the light emitting unit further includes a second light emitting portion, and a constituent material of the second light emitting portion includes a green guest material.
In an embodiment, the green guest material and the first guest material are the same.
In one embodiment, the light emitting unit further includes a third light emitting portion, and a constituent material of the third light emitting portion includes a red guest material.
The embodiment of the invention also provides a display panel, and the display panel comprises the light-emitting device.
The invention provides a light-emitting device and a display panel, wherein the composition material of a first light-emitting part in the light-emitting device comprises a first host material and a first guest material, and when the first host material has the preset polarity under the action of preset voltage, the first guest material absorbs or emits a spectrum, so that the light-emitting color of the first guest material is changed from green to blue. According to the invention, through the influence of the polarity change of the first host material on the light-emitting color of the first guest material, the problem of higher cost of the white light OLED light-emitting device caused by fewer types of light-emitting materials B, high price and the like in the prior art is solved, and the further development of the white light OLED light-emitting device is promoted.
Drawings
The invention is further illustrated by the following figures. It should be noted that the drawings in the following description are only for illustrating some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.
Fig. 1 is a cross-sectional view of a light emitting device according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a light emitting unit according to an embodiment of the invention.
FIG. 3 is a schematic representation of the exo-endo conformational transition of tBCzHDPO molecules provided by an embodiment of the present invention.
Fig. 4 is a schematic diagram of a change of color coordinates of the first light emitting portion with voltage according to an embodiment of the present invention.
Figure 5 is a schematic representation of the exo-endo conformational transition of tBCzHSPO molecules provided by the examples of the present invention.
Fig. 6 is a cross-sectional view of another light emitting device according to an embodiment of the present invention.
Fig. 7 is a cross-sectional view of another light emitting device according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "far away", "close", and the like indicate the orientation or positional relationship based on the drawings, wherein "upper" simply means the surface above the object, specifically refers to the right above, obliquely above, upper surface, as long as it is above the object level, and "close" means the side having a smaller distance from the object in comparison, and the above orientation or positional relationship is only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
It should be noted that the drawings only provide the structures and/or steps which are relatively closely related to the present invention, and some details which are not related to the present invention are omitted, so as to simplify the drawings and make the present invention clear, but not to show that the actual devices and/or methods are the same as the drawings and are not limitations of the actual devices and methods.
The present invention provides a display panel including a light emitting device.
The present invention provides the light emitting device, as shown in fig. 1, the light emitting device 00 includes a light emitting layer 10, the light emitting layer 10 includes a plurality of light emitting units 101; as shown in fig. 2, the light emitting unit 101 includes a first light emitting portion 1011, and the composition material of the first light emitting portion 1011 includes a first host material and a first guest material.
In particular, the first host material has a preset polarity under the action of a preset voltage; the first guest material is used for emitting green light, and when the first host material has the preset polarity, the first guest material absorbs or emits a spectrum, so that the light emitting color of the first guest material is changed from green to blue.
Specifically, when the voltage applied to the first host material is smaller than the preset voltage, the polarity of the first host material is larger than the preset polarity, and at this time, the first guest material emits green light under the action of the voltage; when the voltage applied to the first host material is gradually increased, the polarity of the first host material is gradually reduced, and the color of the light emitted by the first guest material under the action of the voltage is gradually changed from green to blue; when the voltage acting on the first host material is within the range of the preset voltage and the polarity of the first host material is within the range of the preset polarity, the first guest material emits blue light under the action of the voltage.
In one embodiment, the first guest material includes a green thermally activated delayed fluorescence material. Among them, delayed fluorescence, also called delayed fluorescence, is derived from radiative transition of the S1 state regenerated from the first excited triplet state; further, thermally activated delayed fluorescence refers to when a triplet excited state and a singlet excited state are close in energy, the triplet excited state can cross over to the singlet excited state through thermally activated reverse intersystem crossing, and is also referred to as E-type delayed fluorescence.
It is understood that since the thermal activation delayed fluorescent material induces the exciton on the triplet state to be converted into the singlet exciton through the reverse intersystem crossing process by absorbing the external heat, the increase of the temperature can promote the reverse intersystem crossing process to be performed, thereby increasing the fluorescent efficiency, and the sufficiently small energy difference between the singlet state and the triplet state is crucial. The external quantum efficiency of the prior green-light thermal activation delay fluorescent material is higher, and the price of the prior blue luminescent material is more expensive and rare, so that the green-light thermal activation delay fluorescent material with the lyotropic discoloration effect can be considered to be combined with a corresponding host material to generate blue light; the lyotropic effect is understood to be the ability of the above-mentioned first host material to change its polarity, causing the absorption or emission spectrum of the first guest material, resulting in a solution of the first guest material with a significantly different color.
In one embodiment, the thermally activated delayed fluorescence material may include at least one of DMAC-DPC, BP-DPAC, DPAC-BP-DPAC.
In an embodiment, the first host material may comprise tBCzHDPO.
In one embodiment, the predetermined voltage is not less than 4V and not more than 8V.
In one embodiment, the predetermined polarity corresponds to a dipole moment not greater than 3.3 debye.
Wherein the molecular structural formula of tBCzHDPO is shown as
It will be appreciated that tBCzHDPO is a molecule with a variable bipolar behaviour, i.e. two conformations of different polarity are present in this molecule. As shown in FIG. 3, before applying a voltage, the tBCzHDPO molecule was in an Exo-type conformation, i.e., an "Exo-type" structure, where the polarity was large and the corresponding dipole moment was 7.88 Debye; during a certain period of applied voltage, tBCzHDPO changes from its exo-to Endo-type conformation, i.e. "Endo-type" structure in the figure, where the corresponding dipole moment is 3.29 debye, and during this conformation change the polarity of the tBCzHDPO molecules is significantly reduced, corresponding to a dipole moment change value of "-4.59 debye", an enthalpy change of "-11.7 KJ/mol" and an energy change value of "-0.08 eV". Furthermore, hydrogen bonds are formed between hydrogen atoms and oxygen atoms in the molecule of the internal conformation of tBCzHDPO, so that the formed internal conformation has the advantage of thermodynamic stability, and the molecule of the internal conformation of the tBCzHDPO can still keep a low-polarity conformation after voltage is removed, so that the molecule corresponds to the internal conformation of the tBCzHDPOThe thermally activated delayed fluorescence material of (a) may still emit blue light.
Specifically, for example, the thermally activated delayed fluorescence material may be DMAC-DPS, and the first host material may be tBCzHDPO. Wherein DMAC-DPS is a commonly used blue light heat-activated delayed fluorescence material, the related introduction of tBCzHDPO can be referred to above. As shown in fig. 4, when the voltage applied to the first light emitting portion composed of the first host material and the first guest material is increased from 3.5V to 10V, the color coordinate y of the first light emitting portion is changed by more than 0.1, the light emission color is gradually changed from cyan to deep blue, and the magnitude of the light emission color change thereof has a remarkable voltage-dependent characteristic. Therefore, the voltage applied to the first light emitting unit can be adjusted to meet the desired emission color according to the actual situation.
It is understood that the thermally activated delayed fluorescence material is not limited to DMAC-DPS, BP-DPAC, DPAC-BP-DPAC, and the first host material is not limited to tBCzHDPO, and only needs to satisfy: at a certain voltage, the polarity of the first host material can be reduced to a certain value, and the property of the first host material with reduced polarity is irreversible, and it is noted that a certain conformation structure in the first host material can contain hydrogen bonds to maintain the irreversible property with reduced polarity; the thermal activation delayed fluorescence material is matched with the first main material, and can emit blue light only under the relatively stable polarity corresponding to the first main material.
In an embodiment, the first host material may further comprise tBCzHSPO.
Wherein the molecular structural formula of tBCzHSPO is shown asIt will be appreciated that the tBCzHSPO molecule differs from the tBCzHDPO molecule in that the tBCzHSPO molecule is of a unilateral structure, with only one molecule being present
The structure of tBCzHDPO belongs to a bilateral structure, and the number of tBCzHDPO is two
And the structure is symmetrical about the nitrogen-hydrogen bond. However, hydrogen bonds can be formed between hydrogen and oxygen atoms in the molecule of the corresponding inner conformation of the tbCzHSPO, as shown in FIG. 5, before voltage is applied, the tbCzHSPO molecule is in an outer conformation, namely an 'Exo-type' structure in the figure, the polarity is larger, and the corresponding dipole moment is 4.02 Debye; during a certain period of applied voltage, tBCzHSPO changes polarity from an exo-to-Endo conformation, i.e. "Endo-type" structure in the figure, with a corresponding dipole moment of 3.36 debye, and during this conformation change the polarity of the molecules of tBCzHSPO is slightly reduced, with a corresponding dipole moment variation value of "-0.66 debye", an enthalpy change of "-21.3 KJ/mol" and an energy variation value of "-0.21 eV. Further, similarly, hydrogen bonds are formed between hydrogen atoms and oxygen atoms in the molecules of the internal conformation of the tbCzHSPO, so that the formed internal conformation has the advantage of thermodynamic stability, and the molecules of the internal conformation of the tbCzHSPO can still keep a low-polarity conformation after the voltage is removed, so that the corresponding thermal activation delayed fluorescent material can still emit blue light.
In one embodiment, as shown in fig. 2, the light emitting unit 101 further includes a second light emitting portion 1012, and the composition material of the second light emitting portion 1012 includes a green guest material.
As can be understood, the composition material of the second light emitting portion 1012 further includes a corresponding host material, and the corresponding host material of the green guest material can also refer to the related data of the prior art.
In an embodiment, the green guest material and the first guest material are the same. For example, the green guest material may be a thermally activated delayed fluorescence material as described above, which may save one type of guest material.
In this case, further, the host material corresponding to the green guest material may be the same as or different from the first host material.
When the host material corresponding to the green guest material is the same as the first host material, it can be understood that both the host material corresponding to the green guest material and the first host material satisfy a tendency that their polarities can be reduced under the action of a voltage, and the reduction tendency is irreversible, so that the kind of one host material can be further saved.
When the host material corresponding to the green guest material is different from the first host material, it can be understood that the first host material needs to satisfy a tendency that the polarity thereof can be reduced under the action of voltage, and the reduced tendency is irreversible, and the specific description may refer to the above; on the basis, the polarity of the host material corresponding to the green guest material should be constantly greater than the polarity of the first host material under the same voltage. It should be noted that the range of the difference in polarity between the host material corresponding to the green guest material and the first host material is related to the specific composition of the first guest material or the green guest material, for example, when the first guest material or the green guest material is DMAC-DPS, the dipole moment corresponding to the difference in polarity may be not less than 4.6 debye, specifically, the polarity value of the material may be obtained by simulation, and then the host guest material corresponding to the first light-emitting portion and the first light-emitting portion corresponding to the difference in polarity is selected.
In one embodiment, the green guest material and the first guest material are different.
In this case, the specific composition materials of the green guest material and the corresponding host material in the composition materials of the second light emitting part 1012 can be directly referred to the related data in the prior art.
At this time, specific constituent materials of the first guest material and the first host material among the constituent materials of the first light emitting portion 1011 may be directly referred to the above description.
In one embodiment, as shown in fig. 2, the light emitting unit 101 further includes a third light emitting part 1013, and the composition material of the third light emitting part 1013 includes a red guest material.
As can be understood, the composition material of the third light emitting part 1013 further includes a corresponding host material, and the host material corresponding to the red guest material also can refer to the related data of the prior art.
In one embodiment, the light emitting unit 101 may further include another light emitting portion having a different light emitting color from the first, second, and third light emitting portions 1011, 1012, and 1013, or the light emitting unit 101 may have a light emitting color of yellow, green, and blue, or the light emitting unit 101 may have a light emitting color of yellow, red, and blue.
In one embodiment, as shown in fig. 1, the light emitting device 00 further includes a hole injection layer 20 and an electron injection layer 30 respectively disposed on two sides of the light emitting layer 10, and an anode layer 40 disposed on a side of the hole injection layer 20 away from the light emitting layer 10 and a cathode layer 50 disposed on a side of the electron injection layer 30 away from the light emitting layer 10.
The anode layer 40 may be a whole conductive thin film, and the cathode layer 50 may include a plurality of cathode portions, the cathode portions being disposed opposite to the plurality of first, second, or third light emitting portions 1011, 1012, or 1013; the hole injection layer 20 and the electron injection layer 30 may be a single conductive film, or may be provided to face the plurality of first light-emitting portions 1011, second light-emitting portions 1012, or third light-emitting portions 1013.
Specifically, a voltage may be applied to the anode layer 40 and each of the cathode portions, and a voltage is applied to two ends of the corresponding hole injection layer 20 and the electron injection layer 30, so that a current is formed between the hole injection layer 20 and the electron injection layer 30, the cathode layer 50 injects electrons into the light emitting layer 10 through the electron injection layer 30, the anode layer 40 injects holes into the light emitting layer 10 through the hole injection layer 20, and when the electrons meet the holes, the holes are filled, and the electrons release energy in the form of photons, that is, emit light.
In one embodiment, as shown in fig. 6, the light emitting device 00 further includes a hole transport layer 60 between the hole injection layer 20 and the light emitting layer 10, and an electron transport layer 70 between the electron injection layer 30 and the light emitting layer 10.
Wherein the hole transport layer 60 is used for transporting holes in the hole injection layer 20 to the light emitting layer 10, thereby increasing the hole transport efficiency; the electron transport layer 70 transports electrons in the electron injection layer 30 to the light emitting layer 10, thereby increasing electron transport efficiency.
In one embodiment, as shown in fig. 7, the light emitting device 00 further includes an electron blocking layer 80 between the hole transport layer 60 and the light emitting layer 10, and a hole blocking layer 90 between the electron transport layer 70 and the light emitting layer 10.
Wherein the electron blocking layer 80 is used to block electrons in the light emitting layer 10 from flowing into the hole transport layer 60, so that electrons are accumulated in the light emitting layer 10; the hole blocking layer 90 blocks holes in the light emitting layer 10 from flowing into the electron transport layer 70, so that holes are accumulated in the light emitting layer 10.
It can be understood that, since the first light-emitting portions 1011 need to emit green light under the predetermined voltage, the predetermined voltage needs to be determined by testing in advance, and then appropriate voltages are applied to the anode layer 40 and the cathode portion corresponding to each of the first light-emitting portions 1011; the voltage applied to the cathode portion corresponding to the other light emitting portion can be set by a preliminary test or by an existing record.
In one embodiment, for each light-emitting part, the host material and the guest material may be prepared as a corresponding mixed solution, and the light-emitting part may be manufactured by ink-jet printing, screen printing, or the like.
In one embodiment, the light emitting part may be fabricated by depositing a host material and a guest material in two evaporation sources, respectively, for each light emitting part.
The invention provides a light-emitting device and a display panel, wherein the composition material of a first light-emitting part in the light-emitting device comprises a first host material and a first guest material, and when the first host material has the preset polarity under the action of preset voltage, the first guest material absorbs or emits a spectrum, so that the light-emitting color of the first guest material is changed from green to blue. According to the invention, through the influence of the polarity change of the first host material on the light-emitting color of the first guest material, the problem of higher cost of the white light OLED light-emitting device caused by fewer types of light-emitting materials B, high price and the like in the prior art is solved, and the further development of the white light OLED light-emitting device is promoted.
The light emitting device and the display panel provided by the embodiment of the present invention are described in detail above, and the principle and the embodiment of the present invention are explained in detail herein by applying specific examples, and the description of the above embodiments is only used to help understanding the technical solution and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A light-emitting device characterized by comprising a light-emitting layer including a plurality of light-emitting units, the light-emitting units including a first light-emitting portion whose constituent materials include a first host material and a first guest material;
the first main body material has a preset polarity under the action of a preset voltage;
the first guest material is used for emitting green light, and when the first host material has the preset polarity, the first guest material absorbs or emits a spectrum, so that the light emitting color of the first guest material is changed from green to blue.
2. A light emitting device according to claim 1, wherein the first guest material comprises a thermally activated delayed fluorescence material.
3. A light emitting device according to claim 2, wherein the thermally activated delayed fluorescence material comprises at least one of DMAC-DPS, BP-DPAC, DPAC-BP-DPAC.
4. A light-emitting device according to claim 1, wherein the first host material comprises tBCzHDPO, and the molecular structure of tBCzHDPO is
5. A light emitting device according to claim 1, wherein the predetermined voltage is not less than 4V and not more than 8V.
6. A light emitting device according to claim 1, wherein the predetermined polarity corresponds to a dipole moment of no more than 3.3 debye.
7. The light-emitting device according to claim 1, wherein the light-emitting unit further comprises a second light-emitting portion, and a constituent material of the second light-emitting portion comprises a green guest material.
8. A light-emitting device according to claim 7, wherein the green guest material and the first guest material are the same.
9. The light-emitting device according to claim 1, wherein the light-emitting unit further comprises a third light-emitting portion, and a constituent material of the third light-emitting portion comprises a red guest material.
10. A display panel characterized in that the display panel comprises the light-emitting device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835266.0A CN110707223A (en) | 2019-09-05 | 2019-09-05 | Light emitting device and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835266.0A CN110707223A (en) | 2019-09-05 | 2019-09-05 | Light emitting device and display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110707223A true CN110707223A (en) | 2020-01-17 |
Family
ID=69193649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910835266.0A Pending CN110707223A (en) | 2019-09-05 | 2019-09-05 | Light emitting device and display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110707223A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104752459A (en) * | 2013-12-25 | 2015-07-01 | 清华大学 | Organic light-emitting diode array |
| CN107579096A (en) * | 2017-07-24 | 2018-01-12 | 武汉华星光电半导体显示技术有限公司 | A kind of OLED display panel and corresponding driving method and drive device |
| CN110137225A (en) * | 2019-05-05 | 2019-08-16 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel and preparation method thereof |
-
2019
- 2019-09-05 CN CN201910835266.0A patent/CN110707223A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104752459A (en) * | 2013-12-25 | 2015-07-01 | 清华大学 | Organic light-emitting diode array |
| CN107579096A (en) * | 2017-07-24 | 2018-01-12 | 武汉华星光电半导体显示技术有限公司 | A kind of OLED display panel and corresponding driving method and drive device |
| CN110137225A (en) * | 2019-05-05 | 2019-08-16 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| CHUNMIAO HAN: ""Allochroic thermally activated delayed fluorescence diodes through field-induced solvatochromic effect"", 《SCIENCE ADVANCES》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ding et al. | Highly Efficient and Color‐Stable Thermally Activated Delayed Fluorescence White Light‐Emitting Diodes Featured with Single‐Doped Single Emissive Layers | |
| Liang et al. | Blue thermally activated delayed fluorescence‐emitting phosphine oxide hosts for ultrasimple and highly efficient white organic light‐emitting diodes | |
| CN107195791B (en) | Organic light-emitting display device | |
| KR102251618B1 (en) | Organic electroluminescent device and display device | |
| US11114044B2 (en) | Blue light compensation film and OLED display | |
| KR20150062759A (en) | Organic Light Emitting Device | |
| Patel et al. | OLED: a modern display technology | |
| JP2024028704A (en) | organic electroluminescent device | |
| KR20110057377A (en) | White organic light emitting device | |
| KR20130036724A (en) | Power-efficient rgbw oled display | |
| JP2007287691A (en) | Organic electroluminescent element and its manufacturing method | |
| KR20170069353A (en) | Delayed Florescence-Quantum Dot Electroluminescence Light Emitting Diode | |
| US20170250364A1 (en) | Organic light-emitting diode (oled) display panel and display apparatus | |
| CN109599493A (en) | A kind of organic electroluminescence device | |
| CN101800291A (en) | Organic electroluminescence device and drive method thereof | |
| CN106784209A (en) | A kind of full-color QLED display devices and preparation method thereof | |
| KR20130074654A (en) | Organic light emitting device | |
| Song et al. | Pure-organic phosphine oxide luminescent materials | |
| EP3010310A1 (en) | Method for driving organic electroluminescent element | |
| Xie et al. | Simple Phenazine‐Based Compounds Realizing Superior Multicolored Emission | |
| CN204464323U (en) | A kind of ultraviolet organic electroluminescence device injecting transmission based on gradient-structure hole | |
| CN109545997A (en) | A kind of display panel and display device | |
| TW201251166A (en) | Organic light-emitting diode device with efficiency roll-up property | |
| CN110707223A (en) | Light emitting device and display panel | |
| US11469346B2 (en) | Light-emitting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant after: TCL Huaxing Photoelectric Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200117 |
|
| RJ01 | Rejection of invention patent application after publication |