WO2016155147A1 - 蓝光有机电致发光器件及制备方法、显示面板和显示装置 - Google Patents
蓝光有机电致发光器件及制备方法、显示面板和显示装置 Download PDFInfo
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- WO2016155147A1 WO2016155147A1 PCT/CN2015/084087 CN2015084087W WO2016155147A1 WO 2016155147 A1 WO2016155147 A1 WO 2016155147A1 CN 2015084087 W CN2015084087 W CN 2015084087W WO 2016155147 A1 WO2016155147 A1 WO 2016155147A1
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- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000010410 layer Substances 0.000 claims abstract description 199
- 239000002344 surface layer Substances 0.000 claims abstract description 111
- 230000005525 hole transport Effects 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 22
- 239000004065 semiconductor Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000005215 recombination Methods 0.000 description 12
- 230000006798 recombination Effects 0.000 description 12
- 239000002131 composite material Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000005012 migration Effects 0.000 description 4
- 238000013508 migration Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 238000010791 quenching Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- 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
-
- 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]
- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
-
- 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]
- H10K50/14—Carrier transporting layers
- H10K50/16—Electron transporting layers
-
- 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]
- H10K50/17—Carrier injection layers
- H10K50/171—Electron injection layers
-
- 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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- 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
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
Definitions
- the present invention relates to the field of display technologies, and in particular, to a blue organic electroluminescent device, a method of fabricating the same, a display panel, and a display device.
- OLED Organic Light Emitting Diode
- LCD Liquid Crystal Display
- OLED display devices are usually provided with a red organic organic light emitting diode (ie, a red OLED), a green organic electroluminescent diode (ie, a green OLED), and a blue organic electroluminescent diode (ie, a blue OLED).
- a red organic organic light emitting diode ie, a red OLED
- a green organic electroluminescent diode ie, a green OLED
- a blue organic electroluminescent diode ie, a blue OLED.
- the organic electroluminescent diodes of light, green light and blue light enable color display of OLED display devices.
- the present invention is directed to the above-mentioned technical problems existing in the prior art, and provides a blue organic electroluminescent device, a preparation method thereof, a display panel, and a display device.
- the blue organic electroluminescent device can greatly reduce the voltage of the blue light-emitting organic electroluminescent device by causing the doping concentration of at least one guest illuminant in the lower surface layer and the upper surface layer to be greater than the doping concentration of the guest illuminant in the intermediate layer.
- the power consumption of the blue organic electroluminescent device is greatly reduced; at the same time, the exciton recombination region can be moved toward the center of the luminescent layer, so that the recombination region and the cavity of the excitons formed by the combination of holes and electrons There is no interface state between the transport layers, which reduces the occurrence of exciton annihilation, and greatly improves the efficiency of the blue organic electroluminescent device.
- a blue organic electroluminescent device comprising: a substrate and an anode, a hole injection layer, a hole transport layer, a light-emitting layer, and an electron transport sequentially disposed on the substrate a layer, an electron injecting layer, and a cathode, the light emitting layer package a lower surface layer on a side close to the hole transport layer, an upper surface layer on a side close to the electron transport layer, and an intermediate layer interposed between the upper surface layer and the lower surface layer;
- the main illuminant of the surface layer and the intermediate layer are doped with a guest illuminant
- the doping concentration of the lower surface layer is greater than the doping concentration of the intermediate layer and the doping concentration of the upper surface layer is greater than the doping concentration of the intermediate layer;
- the doping concentration of the upper layer is greater than the doping concentration of the intermediate layer, and the doping concentration of the upper surface layer is equal to the doping concentration of the intermediate layer;
- the doping concentration of the upper surface layer is greater than the doping concentration of the intermediate layer, and the doping concentration of the lower surface layer is equal to the doping concentration of the intermediate layer.
- the intermediate layer has a doping concentration ranging from 4% to 8%, and the lower surface layer and the upper surface layer have a doping concentration ranging from 20% to 50%.
- the intermediate layer and the upper surface layer have a doping concentration ranging from 4% to 8%, and the lower layer has a doping concentration ranging from 20% to 50%.
- the intermediate layer and the lower layer have a doping concentration ranging from 4% to 8%, and the upper surface layer has a doping concentration ranging from 20% to 50%.
- the thickness of the lower layer ranges from 1 to 2 nm.
- the upper surface layer has a thickness ranging from 2-3 nm.
- the intermediate layer has a thickness ranging from 20 to 30 nm.
- the primary illuminant is an n-type organic semiconductor material
- the guest illuminant is a p-type organic semiconductor material
- a display panel comprising the above-described blue organic electroluminescent device.
- the invention also provides a display device comprising the above display panel.
- the present invention further provides a method for fabricating a blue organic electroluminescent device, comprising: sequentially forming an anode, a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer on a substrate.
- An electron injecting layer and a cathode, the light emitting layer including a lower surface layer on a side close to the hole transport layer, an upper surface layer on a side close to the electron transport layer, and an upper surface layer and the lower surface layer sandwiched between the upper surface layer and the lower surface layer
- the intermediate layer, the forming the light-emitting layer specifically includes:
- the doping concentration of the lower surface layer being greater than the doping concentration of the intermediate layer and the The doping concentration of the upper surface layer is greater than the doping concentration of the intermediate layer;
- the doping concentration of the upper layer is greater than the doping concentration of the intermediate layer, and the doping concentration of the upper surface layer is equal to the doping concentration of the intermediate layer;
- the doping concentration of the upper surface layer is greater than the doping concentration of the intermediate layer, and the doping concentration of the lower surface layer is equal to the doping concentration of the intermediate layer.
- the blue organic electroluminescent device provided by the present invention can be excited by making the doping concentration of at least one of the lower surface layer and the upper surface layer of the guest illuminant larger than the doping concentration of the guest illuminant in the intermediate layer.
- the voltage of the blue organic electroluminescent device is greatly reduced, so that the power consumption of the blue organic electroluminescent device is greatly reduced; at the same time, the exciton recombination region can be moved toward the center of the luminescent layer, thereby combining holes and electrons. There is no interface state between the composite region of the excitons and the hole transport layer, thereby reducing the occurrence of exciton quenching, and the efficiency of the blue organic electroluminescent device is greatly improved.
- the display panel provided by the present invention not only reduces power consumption but also improves efficiency by using the above-described blue organic electroluminescent device.
- the display device provided by the present invention not only reduces power consumption but also improves efficiency by adopting the above display panel.
- 1 is a graph showing voltage-current density changes of a blue organic electroluminescent device when the doping concentration of the guest material of the light-emitting layer is 4% to 8% and 50%;
- FIG. 2 is a cross-sectional view showing the structure of a blue organic electroluminescent device in Embodiment 1 of the present invention
- Figure 3 is a cross-sectional view showing the structure of a blue organic electroluminescent device in Embodiment 2 of the present invention.
- Figure 4 is a cross-sectional view showing the structure of a blue organic electroluminescent device in Embodiment 3 of the present invention.
- the luminescent layer of the blue OLED is usually a small amount of the illuminant material with high luminous efficiency and uniformly doped in the main illuminant material, as shown in FIG. 1 , when the guest illuminant material is in the main illuminant
- the doping concentration in the material is 4%-8%
- the voltage-current density curve of the blue OLED is shown by the dotted line in FIG. 1, and the doping concentration of 4%-8% increases the efficiency of the blue OLED.
- the voltage of the blue OLED is increased, which is disadvantageous for the blue OLED for display.
- the uniform doping concentration of the guest illuminant material in the main illuminant material is too high, such as when the doping concentration of the guest illuminant material in the main illuminant material is 50%, the voltage-current density curve of the blue OLED is changed. As shown by the solid line in Figure 1, the voltage of the blue OLED is reduced by 8.4% compared to the doping concentration of 4% to 8%, but since the doping concentration is 50%, the guest illuminant material is uniformly doped to The doping concentration in the main illuminant material, when the doping concentration of the uniform doping is 50% or more, easily causes a concentration quenching effect to lower the efficiency of the blue OLED.
- the main illuminant material generally transmits only one kind of carriers, such as electrons
- the recombination region (excitons are formed by combining holes and electrons) is generally closer to the hole transport layer in the blue OLED. This easily leads to the existence of an interface state between the exciton recombination region and the hole transport layer, thereby causing exciton annihilation and increasing the voltage for exciting the blue OLED to emit light, and exciton annihilation also reduces the efficiency of the blue OLED.
- the increase in the voltage of the blue OLED illuminating light directly leads to an increase in the power consumption of the blue OLED, which is disadvantageous for the reduction of the power consumption of the OLED display device and the improvement of the efficiency.
- the present embodiment provides a blue organic electroluminescent device, as shown in FIG. 2, comprising: a substrate 1 and an anode 2, a hole injection layer 3, a hole transport layer 4, and a light-emitting layer 5, which are sequentially disposed on the substrate 1.
- the electron transport layer 6, the electron injection layer 7, and the cathode 8, the light-emitting layer 5 includes a lower surface layer 51 on the side close to the hole transport layer 4, an upper surface layer 52 on the side close to the electron transport layer 6, and an upper surface layer 52 and a lower layer
- the intermediate layer 53 between the surface layers 51; the main illuminants of the lower surface layer 51, the upper surface layer 52 and the intermediate layer 53 are doped with a guest illuminant; the doping concentration of the lower surface layer 51 is greater than the doping concentration of the intermediate layer 53 and The doping concentration of the surface layer 52 is greater than the doping concentration of the intermediate layer 53.
- the above arrangement of the light-emitting layer 5 can greatly reduce the voltage for exciting the blue organic electroluminescent device, thereby greatly reducing the power consumption of the blue organic electroluminescent device; at the same time, the above arrangement of the light-emitting layer 5 can also cause exciton recombination.
- the region moves toward the center of the light-emitting layer 5 so that a composite region of excitons formed by combining holes and electrons does not exist between the hole transport layer 4
- the presence of an interface state reduces the occurrence of exciton annihilation, which greatly improves the efficiency of the blue organic electroluminescent device.
- the doping concentration of the intermediate layer 53 ranges from 4% to 8%, and the doping concentration of the lower layer 51 ranges from 20% to 50%.
- the thickness of the lower layer 51 ranges from 1-2 nm.
- the doping concentration of the upper surface layer 52 ranges from 20% to 50%.
- the thickness of the upper surface layer 52 ranges from 2-3 nm.
- the migration rate of holes in the light-emitting layer 5 can be increased, the injection balance of electrons and holes can be improved, and the voltage of the blue organic electroluminescent device can be reduced, thereby reducing the power consumption of the blue organic electroluminescent device;
- the center of the composite region of the excitons can be moved toward the center of the light-emitting layer 5, and the existence of the interface state between the composite region of the excitons formed by the combination of holes and electrons and the hole transport layer 4 can be reduced, thereby reducing excitons. Quenching increases the efficiency of blue organic electroluminescent devices.
- the intermediate layer 53 has a thickness ranging from 20 to 30 nm.
- the intermediate layer 53 of the above doping concentration and thickness can be combined with the upper surface layer 52 and the lower surface layer 51 to increase the migration rate of holes in the light-emitting layer 5, improve the injection balance of electrons and holes, and center the composite region of excitons. Moving toward the center of the light-emitting layer 5 reduces exciton annihilation, thereby not only reducing the power consumption of the blue organic electroluminescent device, but also improving the efficiency of the blue organic electroluminescent device.
- the main illuminant of the luminescent layer 5 is made of an n-type organic semiconductor material
- the guest illuminant is made of a p-type organic semiconductor material.
- the material of the primary illuminant and the material of the guest illuminant are commonly used materials for blue organic electroluminescent devices.
- the light-emitting layer 5 using such a material enables the blue organic electroluminescent device to have lower power consumption and higher efficiency.
- the anode 2 is made of a transparent conductive material such as indium tin oxide, and the anode 2 has a thickness of 70 nm.
- the thickness of the hole injection layer 3 is 10 nm
- the thickness of the hole transport layer 4 is 120 nm
- the thickness of the lower surface layer 51 of the light-emitting layer 5 is 2 nm
- the doping concentration of the guest light-emitting body in the lower surface layer 51 is 50%
- the thickness of the intermediate layer 53 is 25 nm
- the thickness of the upper surface layer 52 of the light-emitting layer 5 is 2 nm
- the doping concentration of the guest light-emitting body in the upper surface layer 52 is 50%
- the thickness of the electron transport layer 6 is 25 nm
- the electron injection layer 7 is
- the thickness is 1 nm
- the cathode 8 is made of a metal conductive material such as aluminum
- the cathode 8 has a thickness of 150 n
- the embodiment further provides a A method for preparing a blue organic electroluminescent device, comprising: sequentially forming an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode on a substrate, wherein the light emitting layer includes a hole transport layer The lower surface layer on one side, the upper surface layer on the side close to the electron transport layer, and the intermediate layer sandwiched between the upper surface layer and the lower surface layer.
- Forming the luminescent layer specifically includes: doping the guest illuminants respectively in the main illuminants of the lower surface layer, the upper surface layer and the intermediate layer, wherein the doping concentration of the lower surface layer is greater than the doping concentration of the intermediate layer and the doping concentration of the upper surface layer is greater than that of the intermediate layer Doping concentration.
- the preparation method of each layer in the blue organic electroluminescent device and the method of doping the guest illuminant in the luminescent layer are all prior art, and therefore will not be described herein.
- the upper surface layer and the lower surface layer of the doped illuminant can be realized by controlling the doping time and the concentration of the guest illuminant to be doped accordingly. The thickness and control of the doping concentration.
- the present embodiment provides a blue organic electroluminescent device. Unlike the first embodiment, as shown in FIG. 3, the doping concentration of the lower layer 51 is greater than the doping concentration of the intermediate layer, and the doping concentration of the upper surface is equal to the middle. The doping concentration of the layer. That is, the upper surface layer and the intermediate layer having the same doping concentration may be combined into one layer. The upper surface layer and the intermediate layer having the same doping concentration in Fig. 3 are not shown.
- the doping concentration range of the intermediate layer and the upper surface layer is 4%-8%, and the doping concentration range of the lower surface layer 51 is 20%-50%.
- the thickness range of the lower surface layer 51 of the light-emitting layer 5 and other structures of the blue organic electroluminescent device in this embodiment are the same as those in the embodiment 1, and will not be described herein.
- the migration rate of holes in the light-emitting layer 5 can be increased, the injection balance of electrons and holes can be improved, and the voltage of the blue organic electroluminescent device can be reduced, thereby reducing the power consumption of the blue organic electroluminescent device;
- the center of the recombination region of the exciton can be moved toward the center of the light-emitting layer 5, and the existence of the interface state between the recombination region of the excitons formed by the combination of holes and electrons and the hole transport layer 4 can be reduced, thereby reducing the radical Sub-annihilation improves the efficiency of blue organic electroluminescent devices.
- the voltage reduction amplitude of the blue organic electroluminescent device in the embodiment is significantly reduced, that is, the power consumption of the blue organic electroluminescent device in this embodiment is significantly lower than that of the device in the first embodiment.
- the power consumption reduction is small.
- the blue organic electroluminescent device of the present embodiment can reduce the voltage by 10% while also improving the blue organic electroluminescence.
- the efficiency of the blue organic electroluminescent device is increased by a smaller amount than that of the device of the first embodiment.
- the preparation method of the blue organic electroluminescent device in this embodiment only needs to control the doping time and the doping concentration, and finally the doped illuminant is doped in the lower layer close to the hole transport layer side.
- the concentration is greater than the doping concentration of the intermediate layer.
- This embodiment provides a blue organic electroluminescent device.
- the doping concentration of the upper surface layer 52 is greater than the doping concentration of the intermediate layer, and the doping concentration of the lower surface layer. It is equal to the doping concentration of the intermediate layer. That is, the lower layer and the intermediate layer having the same doping concentration may be combined into one layer. The lower layer and the intermediate layer having the same doping concentration in Fig. 4 are not shown.
- the doping concentration range of the intermediate layer and the lower layer is 4%-8%, and the doping concentration of the upper surface layer ranges from 20% to 50%.
- the thickness range of the upper surface layer 52 of the light-emitting layer 5 and other structures of the blue organic electroluminescent device in this embodiment are the same as those in Embodiment 1, and will not be described herein.
- the migration rate of holes in the light-emitting layer 5 can be increased, the injection balance of electrons and holes can be improved, and the voltage of the blue organic electroluminescent device can be reduced, thereby reducing the power consumption of the blue organic electroluminescent device;
- the center of the recombination region of the exciton can be moved toward the center of the light-emitting layer 5, and the existence of the interface state between the recombination region of the excitons formed by the combination of holes and electrons and the hole transport layer 4 can be reduced, thereby reducing the radical Sub-annihilation improves the efficiency of blue organic electroluminescent devices.
- the voltage reduction amplitude of the blue organic electroluminescent device in the embodiment is significantly reduced, that is, the power consumption of the blue organic electroluminescent device in this embodiment is significantly lower than that of the device in the first embodiment.
- the power consumption reduction is small.
- the blue organic electroluminescent device of the present embodiment can reduce the voltage by 5% compared to the guest emitter doping concentration of 4% to 8% in the comparative example, while also improving the efficiency of the blue organic electroluminescent device.
- the efficiency of the blue organic electroluminescent device is increased by a smaller amount than that of the device of the first embodiment.
- the preparation method of the blue organic electroluminescent device in this embodiment only needs to control the doping time and the doping concentration, and finally the doping concentration of the illuminant in the upper surface layer of the luminescent layer near the electron transport layer side. Greater than the doping concentration of the intermediate layer.
- the blue organic electroluminescent device provided in Examples 1-3, wherein the doping concentration of at least one of the upper and lower surface layers of the guest illuminant is greater than that of the guest illuminant in the intermediate layer
- the impurity concentration can greatly reduce the voltage for exciting the blue organic electroluminescent device, thereby greatly reducing the power consumption of the blue organic electroluminescent device; and simultaneously moving the exciton recombination region toward the center of the luminescent layer, thereby The interface between the recombination region of the excitons formed by the combination of holes and electrons and the hole transport layer does not exist, thereby reducing the occurrence of exciton quenching, and the efficiency of the blue organic electroluminescent device is greatly improved.
- the embodiment provides a display panel comprising the blue organic electroluminescent device of any of embodiments 1-3.
- the embodiment provides a display device including the display panel in Embodiment 4.
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Abstract
Description
Claims (11)
- 一种蓝光有机电致发光器件,包括:基板以及依次设置在所述基板上的阳极、空穴注入层、空穴传输层、发光层、电子传输层、电子注入层和阴极,其特征在于,所述发光层包括靠近所述空穴传输层一侧的下表层、靠近所述电子传输层一侧的上表层和夹设于所述上表层和所述下表层之间的中间层;所述下表层、所述上表层和所述中间层的主发光体中均掺杂有客发光体,所述下表层的掺杂浓度大于所述中间层的掺杂浓度和所述上表层的掺杂浓度大于所述中间层的掺杂浓度;或者,所述下表层的掺杂浓度大于所述中间层的掺杂浓度,所述上表层的掺杂浓度等于所述中间层的掺杂浓度;或者,所述上表层的掺杂浓度大于所述中间层的掺杂浓度,所述下表层的掺杂浓度等于所述中间层的掺杂浓度。
- 根据权利要求1所述的蓝光有机电致发光器件,其特征在于,所述中间层的掺杂浓度范围为4%-8%,所述下表层和所述上表层的掺杂浓度范围均为20%-50%。
- 根据权利要求1所述的蓝光有机电致发光器件,其特征在于,所述中间层和所述上表层的掺杂浓度范围均为4%-8%,所述下表层的掺杂浓度范围为20%-50%。
- 根据权利要求1所述的蓝光有机电致发光器件,其特征在于,所述中间层和所述下表层的掺杂浓度范围均为4%-8%,所述上表层的掺杂浓度范围为20%-50%。
- 根据权利要求1-4任意一项所述的蓝光有机电致发光器件,其特征在于,所述下表层的厚度范围为1-2nm。
- 根据权利要求1-4任意一项所述的蓝光有机电致发光器件,其特征在于,所述上表层的厚度范围为2-3nm。
- 根据权利要求1-4任意一项所述的蓝光有机电致发光器件,其特征在于,所述中间层的厚度范围为20-30nm。
- 根据权利要求1-4任意一项所述的蓝光有机电致发光器件,其特征在于,所述主发光体采用n型有机半导体材料,所述客发光体采用p型有机半导体材料。
- 一种显示面板,其特征在于,包括权利要求1-8任意一项所述的蓝光有机电致发光器件。
- 一种显示装置,其特征在于,包括权利要求9所述的显示面板。
- 一种蓝光有机电致发光器件的制备方法,包括:在基板上依次形成阳极、空穴注入层、空穴传输层、发光层、电子传输层、电子注入层和阴极,所述发光层包括靠近所述空穴传输层一侧的下表层、靠近所述电子传输层一侧的上表层和夹设于所述上表层和所述下表层之间的中间层,其特征在于,形成所述发光层具体包括:在所述下表层、所述上表层和所述中间层的主发光体中分别掺杂客发光体,所述下表层的掺杂浓度大于所述中间层的掺杂浓度和所述上表层的掺杂浓度大于所述中间层的掺杂浓度;或者,所述下表层的掺杂浓度大于所述中间层的掺杂浓度,所述上表层的掺杂浓度等于所述中间层的掺杂浓度;或者,所述上表层的掺杂浓度大于所述中间层的掺杂浓度,所述下表层的掺杂浓度等于所述中间层的掺杂浓度。
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US15/023,295 US9954192B2 (en) | 2015-03-30 | 2015-07-15 | Blue organic electroluminescent device and preparation method thereof, display panel and display apparatus |
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CN201510144863.0A CN104716265B (zh) | 2015-03-30 | 2015-03-30 | 蓝光有机电致发光器件及制备方法、显示面板和显示装置 |
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CN108878663A (zh) * | 2017-05-10 | 2018-11-23 | Tcl集团股份有限公司 | Qled器件及其制备方法 |
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CN104716265B (zh) | 2015-03-30 | 2017-03-15 | 京东方科技集团股份有限公司 | 蓝光有机电致发光器件及制备方法、显示面板和显示装置 |
CN106972111B (zh) * | 2017-06-01 | 2018-11-20 | 上海天马有机发光显示技术有限公司 | 有机发光器件和显示装置 |
KR102661468B1 (ko) * | 2019-02-15 | 2024-04-30 | 삼성디스플레이 주식회사 | 유기 발광 소자 및 이를 포함한 전자 장치 |
CN111048675A (zh) * | 2019-11-29 | 2020-04-21 | 昆山国显光电有限公司 | 一种显示面板及显示装置 |
CN115477939A (zh) * | 2022-09-28 | 2022-12-16 | 京东方科技集团股份有限公司 | 有机电致发光组合物、有机电致发光器件以及包含其的显示装置 |
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CN104716265A (zh) | 2015-06-17 |
US20170047536A1 (en) | 2017-02-16 |
CN104716265B (zh) | 2017-03-15 |
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