WO2018201563A1 - 有机发光显示装置 - Google Patents
有机发光显示装置 Download PDFInfo
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- WO2018201563A1 WO2018201563A1 PCT/CN2017/088331 CN2017088331W WO2018201563A1 WO 2018201563 A1 WO2018201563 A1 WO 2018201563A1 CN 2017088331 W CN2017088331 W CN 2017088331W WO 2018201563 A1 WO2018201563 A1 WO 2018201563A1
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- organic light
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- display device
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- 239000000463 material Substances 0.000 claims abstract description 138
- 238000002347 injection Methods 0.000 claims abstract description 48
- 239000007924 injection Substances 0.000 claims abstract description 48
- 230000000903 blocking effect Effects 0.000 claims abstract description 24
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- 239000000758 substrate Substances 0.000 claims description 38
- 239000002019 doping agent Substances 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 21
- 238000007650 screen-printing Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000003996 delayed luminescence Methods 0.000 claims description 5
- 238000007641 inkjet printing Methods 0.000 claims description 5
- 238000004020 luminiscence type Methods 0.000 claims description 5
- 238000004528 spin coating Methods 0.000 claims description 5
- 238000010345 tape casting Methods 0.000 claims description 4
- 238000001771 vacuum deposition Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 239000000969 carrier Substances 0.000 abstract description 14
- 238000005215 recombination Methods 0.000 abstract description 10
- 230000006798 recombination Effects 0.000 abstract description 10
- 230000004888 barrier function Effects 0.000 abstract description 5
- 108091006149 Electron carriers Proteins 0.000 abstract description 3
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- 238000005516 engineering process Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- 150000002894 organic compounds Chemical class 0.000 description 3
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004770 highest occupied molecular orbital Methods 0.000 description 2
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004776 molecular orbital Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- MWHKLNFTPMELEA-UHFFFAOYSA-N 2,5-bis(2-carbazol-9-ylphenyl)-1,3,4-oxadiazole Chemical compound C1=CC=CC=2C3=CC=CC=C3N(C1=2)C1=C(C=CC=C1)C=1OC(=NN=1)C1=C(C=CC=C1)N1C2=CC=CC=C2C=2C=CC=CC1=2 MWHKLNFTPMELEA-UHFFFAOYSA-N 0.000 description 1
- ZEPNEZBNLFFDDA-UHFFFAOYSA-N 4,7-di(carbazol-9-yl)-1,10-phenanthroline Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=NC2=C1C=CC1=C(N3C4=CC=CC=C4C4=CC=CC=C43)C=CN=C21 ZEPNEZBNLFFDDA-UHFFFAOYSA-N 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]
- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
- H10K50/155—Hole transporting 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]
- H10K50/14—Carrier transporting layers
- H10K50/16—Electron transporting layers
- H10K50/165—Electron transporting 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]
- H10K50/18—Carrier blocking layers
- H10K50/181—Electron blocking layers
Definitions
- the present invention relates to the field of display technologies, and in particular, to an organic light emitting display device.
- OLED Organic Light-emitting Display
- LCD liquid crystal display
- OLED does not require an additional backlight source.
- OLED has thin thickness, light weight, low driving voltage and energy consumption, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide temperature range, flexible display and large area. Color display and many other advantages, recognized by the industry as the most promising display device.
- a conventional active organic light-emitting display device mainly includes a base substrate, a thin film transistor (TFT) layer provided on the base substrate, an organic light-emitting element disposed on the TFT layer, and an organic light-emitting element disposed thereon Encapsulating the encapsulating layer; wherein the TFT layer is used to drive the organic light emitting element, and the organic light emitting element generally further includes a pixel electrode serving as an anode, a cathode, and a common electrode, and being disposed at the pixel electrode and the common electrode.
- the organic light-emitting functional layer is such that light is emitted from the organic light-emitting functional layer when a suitable voltage is applied to the anode and the cathode.
- the organic light-emitting functional layer generally includes a hole injection layer provided on the anode, a hole transport layer provided on the hole injection layer, a light-emitting layer provided on the hole transport layer, and an electron transport layer provided on the light-emitting layer.
- the electron injection layer disposed on the electron transport layer has a light-emitting mechanism in which electrons and holes are injected from the cathode and the anode to the electron injection layer and the hole injection layer, respectively, and electrons and holes are respectively transmitted through electrons.
- the layer and the hole transport layer migrate to the light-emitting layer and meet in the light-emitting layer to form excitons and excite the light-emitting molecules, which undergo radiation relaxation to emit visible light.
- An object of the present invention is to provide an organic light-emitting display device which reduces carrier injection barrier in an organic light-emitting device by mixing organic compound films with different functions, and controls carrier injection rate and carrier recombination region. Position, improve the recombination efficiency of carriers, thereby obtaining High efficiency, long life organic light emitting device.
- the present invention provides an organic light emitting display device including a substrate and an organic light emitting device disposed on the substrate;
- the organic light emitting device includes an anode layer, a cathode layer, and an organic light emitting medium layer disposed between the anode layer and the cathode layer;
- the organic light-emitting medium layer includes a hole injection layer, a hole transport layer, a first mixed layer, a light-emitting layer, an electron transport layer, and an electron injection layer disposed in sequence on a side of the anode layer adjacent to the cathode layer;
- the first mixed layer is a mixed material layer comprising a bipolar host material and a first functional dopant material; wherein the bipolar host material is a compound having a function of simultaneously transporting holes and electrons;
- a functional dopant material is a material having an electron blocking function, a material having a hole control function, or a combination of both.
- the organic light-emitting medium layer further includes a second mixed layer disposed between the light-emitting layer and the electron transport layer; the second mixed layer includes a bipolar host material.
- the second mixed layer is a mixed material layer further comprising a second functional doping material; wherein the second functional doping material is a material having a hole blocking function, a material having an electronic control function, or two Combination of people.
- the luminescent layer is a mixed material layer comprising a bipolar host material and an luminescent dopant
- the first mixed layer, the light-emitting layer, and the second mixed layer together constitute a mixed layer group; the thickness of the first mixed layer and the thickness of the second mixed layer each occupy a thickness ratio of the entire mixed layer group of not more than 1 /3.
- the luminescent dopant is triplet excited phosphorescence, singlet excited fluorescent luminescence, or thermally activated delayed luminescence.
- the thickness of the first mixed layer is The weight ratio of the doped first functional dopant material is from 1% to 50%.
- the thickness of the second mixed layer is the thickness of the second mixed layer
- the weight ratio of the second functional doping material doped in the second mixed layer is from 1% to 50%.
- the hole injection layer, the hole transport layer, the first mixed layer, the light-emitting layer, the electron transport layer, the electron injection layer, and the second mixed layer in the organic light-emitting medium layer are all subjected to vacuum evaporation method or inkjet printing method. Formed by a knife coating method, a spin coating method, or a screen printing method.
- the substrate is a TFT substrate
- the anode layer, the organic light-emitting medium layer, and the cathode layer are sequentially disposed on the substrate from bottom to top; or
- the cathode layer, the organic light-emitting medium layer, and the anode layer are from bottom to top It is sequentially disposed on the substrate.
- the present invention also provides an organic light emitting display device comprising a substrate and an organic light emitting device disposed on the substrate;
- the organic light emitting device includes an anode layer, a cathode layer, and an organic light emitting medium layer disposed between the anode layer and the cathode layer;
- the organic light-emitting medium layer includes a hole injection layer, a hole transport layer, a first mixed layer, a light-emitting layer, an electron transport layer, and an electron injection layer disposed in sequence on a side of the anode layer adjacent to the cathode layer;
- the first mixed layer is a mixed material layer comprising a bipolar host material and a first functional dopant material; wherein the bipolar host material is a compound having a function of simultaneously transporting holes and electrons;
- a functional doping material is a material having an electron blocking function, a material having a hole controlling function, or a combination of both;
- the thickness of the first mixed layer is The weight ratio of the doped first functional dopant material is 1%-50%;
- the substrate is a TFT substrate
- the anode layer, the organic light-emitting medium layer, and the cathode layer are sequentially disposed on the substrate from bottom to top; or
- a cathode layer, an organic light-emitting medium layer, and an anode layer are sequentially disposed on the substrate from bottom to top.
- the present invention provides an organic light emitting display device, wherein an organic light emitting device includes an anode layer, a cathode layer, and an organic light emitting medium layer disposed between the anode layer and the cathode layer; the organic light emitting medium layer includes a hole injection layer, a hole transport layer, a first mixed layer, a light emitting layer, an electron transport layer, and an electron injection layer disposed in sequence; wherein the first mixed layer includes a bipolar having functions of simultaneously transporting holes and electrons a host material and doped with at least one of a material having an electron blocking function and a material having a hole controlling function; reducing an injection barrier of carriers of holes and electrons in the organic light emitting device, and controlling carriers
- the injection rate and the position of the carrier recombination region improve the recombination efficiency of the carriers, thereby obtaining a high-efficiency, long-life organic light-emitting device.
- FIG. 1 is a schematic structural view of a first embodiment of an organic light emitting display device of the present invention
- FIG. 2 is a schematic structural view of a second embodiment of an organic light emitting display device of the present invention.
- FIG. 3 is a schematic structural view of a third embodiment of an organic light emitting display device of the present invention.
- FIG. 4 is a schematic structural view of a fourth embodiment of an organic light emitting display device of the present invention.
- the organic light emitting display device includes a substrate 100, and an organic light emitting device 200 disposed on the substrate 100;
- the organic light emitting device 200 includes an anode layer 201, a cathode layer 202, and an organic light emitting medium layer 210 disposed between the anode layer 201 and the cathode layer 202;
- the organic light-emitting medium layer 210 includes a hole injection layer 203, a hole transport layer 204, a first mixed layer 205, a light-emitting layer 206, and an electron transport layer 207, which are sequentially disposed on the anode layer 201 near the cathode layer 202 side. And an electron injection layer 208;
- the first mixed layer 205 is a mixed material layer comprising a bipolar host material and a first functional dopant material; wherein the bipolar host material is a compound having a function of simultaneously transporting holes and electrons, the double The polar host material can simultaneously transport holes and electrons.
- the bipolar host material can be 4,7-di-carbazol-9-yl-[1,10]-phenanthroline (abbreviated BUPH1), 2, 5 -BIS (2-(9H-carbazol-9-yl)phenyl)-1,3,4-oxadiazole (abbreviation o-CzOXD) or N-(4-diphenylphosph-oryphenyl carbazole (abbreviated MOP12).
- BUPH1 4,7-di-carbazol-9-yl-[1,10]-phenanthroline
- o-CzOXD 2, 5 -BIS (2-(9H-carbazol-9-yl)phenyl)
- the first functional dopant material is a material having an electron blocking function, a material having a hole control function, or a combination of the two; that is, the first mixed layer 205 may be doped with a material having an electron blocking function, The electrons injected from the cathode 202 are blocked from passing through the light-emitting layer 206 to the side of the hole transport layer 204; or
- the first mixed layer 205 may also be doped with a material having a hole control function to control the rate at which hole carriers are injected from the hole transport layer 204 to the light emitting layer 206; or
- the first mixed layer 205 may also be doped with a material having an electron blocking function and a material having a hole control function while preventing electrons injected from the cathode 202 from passing through the light emitting layer 206 to the side of the hole transport layer 204. And controlling the rate at which hole carriers are injected from the hole transport layer 204 to the light emitting layer 206.
- the material of the hole transport layer 204 has a hole transport function and is a hole transport material; the material of the hole injection layer 203 has a hole injection function, which is a hole injection material; the hole transport The material of layer 204 has a larger or equal ionization potential than the material of hole injection layer 203.
- the material of the electron transport layer 207 has an electron transport function and is an electron transport material; the material of the electron injection layer 208 has an electron injection function and is an electron injection material.
- the material having an electron blocking function has a larger highest occupied molecular orbital (HOMO) and a lowest unoccupied molecular orbital (LUMO) energy level difference than the hole transporting material and the electron transporting material;
- a material having a hole control function has a slower hole mobility than a hole transport material.
- the thickness of the first mixed layer 205 is Wherein the weight ratio of the doped first functional dopant material is from 1% to 50%; that is, when the first functional dopant material is a material having an electron blocking function, the material having an electron blocking function is doped.
- the weight ratio of the impurity in the first mixed layer 205 is 1% to 50%; when the first functional dopant material is a material having a hole control function, the material having a hole control function is doped
- the weight ratio in the first mixed layer 205 is 1% to 50%; when the first functional dopant material is a combination of a material having an electron blocking function and a material having a hole control function, the electronic barrier
- the weight ratio of the functional material and the material having the hole control function to the first mixed layer 205 is 1% to 50%, and the sum of the two is also 1% by weight in the first mixed layer 205. %.
- the substrate 100 is a TFT substrate; the substrate 100 may be a rigid substrate or a flexible substrate.
- the organic light emitting device 200 may be an upright device, wherein the anode layer 201, the organic light emitting medium layer 210, and the cathode layer 202 are sequentially disposed on the substrate 100 from bottom to top; the organic light emitting medium layer 210
- the hole injection layer 203 in the middle may be subjected to Vacuum Evaporation, Ink-jet Printing, Blade Coating, Spin-Coating, Screen Printing.
- a method such as (Screen Printing) is formed on the anode layer 201 on the substrate 100, and a hole injection layer 203 of a small molecule material is preferably formed by vacuum deposition.
- the other organic compound film in the organic light-emitting medium layer 210, the hole transport layer 204, the first mixed layer 205, the light-emitting layer 206, the electron transport layer 207, and the electron injection layer 208 may also be, for example, hole injection.
- the formation method of the layer 203 can be formed by a vacuum vapor deposition method, an inkjet printing method, a knife coating method, a spin coating method, or a screen printing method.
- the organic light emitting device 200 may also be an inverted device, wherein the cathode layer 202, the organic light emitting medium layer 210, and the anode layer 201 are sequentially disposed on the substrate 100 from bottom to top.
- the organic light emitting device 200 may be red, green, blue, and other colors.
- the organic light emitting device 200 may be a bottom emission light emitting device that emits light from the substrate 100, or may be a top emission light emitting device that emits light from a side facing away from the substrate 100.
- the organic light-emitting display device of the present invention reduces the injection potential of carriers (holes and electrons) in the organic light-emitting device by matching the organic compound film having different functions in the organic light-emitting device 200, and controls the injection rate of carriers. And the position of the carrier recombination region improves the recombination efficiency of the carriers, thereby obtaining the organic light-emitting device 200 with high efficiency and long life.
- the organic light emitting dielectric layer 210 further includes a light emitting layer 206 and The second mixed layer 209 between the electron transport layers 207; the second mixed layer 209, like the first mixed layer 205, also contains a bipolar host material that can simultaneously transport holes and electrons.
- the luminescent layer 206 also includes a bipolar host material and is doped with an illuminating dopant to have a luminescent function; thus, the first mixed layer 205, the luminescent layer 206, and the second mixed layer 209 are combined
- the mixed layer group 220 is respectively used as the first segment, the second segment, and the third segment in the mixed layer group 220.
- the luminescent dopant in the luminescent layer 206 is triplet excited phosphorescence, singlet excited fluorescent luminescence, or thermally activated delayed luminescence.
- the thickness of the first mixed layer 205 and the thickness of the second mixed layer 209 each occupy no more than 1/3 of the thickness ratio of the entire mixed layer group 220.
- the thickness of the second mixed layer 209 is
- the organic light emitting dielectric layer 210 further includes a light emitting layer 206 and a second mixed layer 209 between the electron transport layers 207;
- the second mixed layer 209 like the first mixed layer 205, also contains a bipolar host material capable of simultaneously transporting holes and electrons, and is also doped therein a second functional dopant material;
- the second functional dopant material is a material having a hole blocking function, a material having an electronic control function, or a combination of both; that is, the second mixed layer 209 can be Doping a material having a hole blocking function to block holes injected from the anode 201 from passing through the light emitting layer 206 to the side of the electron transport layer 207; or
- the second mixed layer 209 may also be doped with a material having an electronic control function to control the rate at which electron carriers are injected from the electron transport layer 207 to the light emitting layer 206; or
- the second mixed layer 209 may also be doped with a material having a hole blocking function and a material having an electron control function while blocking holes injected from the anode 201 through the light emitting layer 206 to the side of the electron transport layer 207 and The rate at which electron carriers are injected from the electron transport layer 207 to the light emitting layer 206 is controlled.
- the material having a hole blocking function has a larger occupied molecular orbital and a lower unoccupied molecular orbital level difference than the hole transporting material and the electron transporting material, and has an electronic control function.
- the material has a slower electron mobility than the electron transport material.
- the thickness of the second mixed layer 209 is Wherein the weight ratio of the doped second functional dopant material is from 1% to 50%; that is, when the second functional dopant material is a material having a hole blocking function, the hole blocking function
- the weight ratio of the material doped in the second mixed layer 209 is 1%-50%; when the second functional doping material is a material having an electronic control function, the material having the electronic control function is doped
- the weight ratio in the second mixed layer 209 is 1% to 50%; when the second functional dopant material is a combination of a material having a hole blocking function and a material having an electronic control function, the hole blocking
- the weight ratio of the functional material and the material having the electronic control function to the second mixed layer 209 is 1% to 50%, and the sum of the two is also 1% to 50% by weight in the second mixed layer 209. .
- the light emitting layer 206 also includes a bipolar host material, and is mixed therein.
- the light-emitting dopant has a light-emitting function; thus, the first mixed layer 205, the light-emitting layer 206, and the second mixed layer 209 collectively constitute a mixed layer group 220 as the first in the mixed layer group 220 One paragraph, two paragraphs, and three paragraphs.
- the luminescent dopant in the luminescent layer 206 is triplet excited phosphorescence, singlet excited fluorescent luminescence, or thermally activated delayed luminescence.
- the thickness of the first mixed layer 205 and the thickness of the second mixed layer 209 each occupy no more than 1/3 of the thickness ratio of the entire mixed layer group 220.
- the present invention provides an organic light emitting display device having an organic light emitting device including an anode layer, a cathode layer, and an organic light emitting medium layer disposed between the anode layer and the cathode layer;
- the organic light emitting medium layer includes a hole injection layer, a hole transport layer, a first mixed layer, a light emitting layer, an electron transport layer, and an electron injection layer disposed in sequence;
- the first mixed layer includes a bipolar having functions of simultaneously transporting holes and electrons a host material and doped with at least one of a material having an electron blocking function and a material having a hole controlling function; reducing an injection barrier of carriers of holes and electrons in the organic light emitting device, and controlling carriers
- the injection rate and the position of the carrier recombination region improve the recombination efficiency of the carriers, thereby obtaining a high-efficiency, long-life organic light-emitting device.
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Abstract
一种有机发光显示装置，其有机发光器件（200）包括阳极层（201）、阴极层（202）、及设于阳极层（201）和阴极层（202）之间的有机发光介质层（210）；所述有机发光介质层（210）包括依次设置的空穴注入层（203）、空穴传输层（204）、第一混合层（205）、发光层（206）、电子传输层（207）、及电子注入层（208）；其中，所述第一混合层（205）包含具有同时传输空穴和电子功能的双极性主体材料，并掺杂了具有电子阻挡功能的材料和具有空穴控制功能的材料中至少一种；可减少有机发光器件（200）中空穴和电子的载流子的注入势垒，控制载流子的注入速率和载流子复合区域的位置，提高载流子的复合效率，从而获得了高效率、长寿命的有机发光器件（200）。
Description
本发明涉及显示技术领域，尤其涉及一种有机发光显示装置。
有机发光显示(Organic Light-emitting Display,OLED)技术是本领域公知的，具有自发光特点，与液晶显示(Liquid Crystal Display,LCD)技术不同，OLED不需要额外的背光光源。另外，OLED还具有厚度薄、重量轻、驱动电压和能耗低、发光效率高、响应时间短、清晰度与对比度高、近180°视角、使用温度范围宽、可实现柔性显示与大面积全色显示等诸多优点，被业界公认为是最有发展潜力的显示装置。
有机发光显示装置分为主动型和被动型两种，其中，主动型平面显示器具有机身薄、省电等众多优点，而得到了广泛的应用。现有主动型有机发光显示装置主要包括衬底基板、设于衬底基板上的薄膜晶体管(Thin Film Transistor，TFT)层、设于TFT层上有机发光元件、及设于有机发光元件上方对其进行封装的封装层；其中，TFT层用于对有机发光元件进行驱动，而有机发光元件通常又包括分别用作阳极、与阴极的像素电极、和公共电极、以及设在像素电极与公共电极之间的有机发光功能层，使得在适当的电压被施加于阳极与阴极时，从有机发光功能层发光。有机发光功能层通常包括了设于阳极上的空穴注入层、设于空穴注入层上的空穴传输层、设于空穴传输层上的发光层、设于发光层上的电子传输层、设于电子传输层上的电子注入层，其发光机理为在一定电压驱动下，电子和空穴分别从阴极和阳极注入到电子注入层和空穴注入层，电子和空穴分别经过电子传输层和空穴传输层迁移到发光层，并在发光层中相遇，形成激子并使发光分子激发，后者经过辐射弛豫而发出可见光。
目前，有机发光器件效率和寿命的降低是有机发光显示装置一直以来所亟需解决的技术问题。
发明内容
本发明的目的在于提供一种有机发光显示装置，通过不同功能的有机化合物薄膜的搭配，减少有机发光器件中载流子的注入势垒，控制载流子的注入速率和载流子复合区域的位置，提高载流子的复合效率，从而获得
高效率、长寿命的有机发光器件。
为实现上述目的，本发明提供一种有机发光显示装置，包括基板、及设于基板上的有机发光器件；
所述有机发光器件包括阳极层、阴极层、及设于阳极层和阴极层之间的有机发光介质层；
所述有机发光介质层包括在所述阳极层靠近阴极层一侧依次设置的空穴注入层、空穴传输层、第一混合层、发光层、电子传输层、及电子注入层；
所述第一混合层为包含双极性主体材料和第一功能性掺杂材料的混合材料层；其中，所述双极性主体材料为具有同时传输空穴和电子功能的化合物；所述第一功能性掺杂材料为具有电子阻挡功能的材料、具有空穴控制功能的材料、或两者的组合。
所述有机发光介质层还包括设于所述发光层和电子传输层之间的第二混合层；所述第二混合层包含双极性主体材料。
所述第二混合层为还包含第二功能性掺杂材料的混合材料层；其中，所述第二功能性掺杂材料为具有空穴阻挡功能的材料、具有电子控制功能的材料、或两者的组合。
所述发光层为包含双极性主体材料和发光掺杂剂的混合材料层；
所述第一混合层、发光层、及第二混合层共同构成了混合层组；所述第一混合层的厚度、第二混合层的厚度各占整个混合层组的厚度比例均不超过1/3。
所述发光掺杂剂为三重激发态磷光发光、单重激发态荧光发光、或热激活延迟荧光发光。
所述第一混合层的厚度为
其中掺杂的第一功能性掺杂材料的重量比例为1％-50％。
所述第二混合层的厚度为
所述第二混合层中掺杂的第二功能性掺杂材料的重量比例为1％-50％。
所述有机发光介质层中的空穴注入层、空穴传输层、第一混合层、发光层、电子传输层、电子注入层、及第二混合层均通过真空蒸镀法、喷墨打印法、刮刀涂布法、旋涂法、或网印法制作形成。
所述基板为TFT基板；
所述有机发光器件中，阳极层、有机发光介质层、及阴极层由下至上依次设于所述基板上；或者，
所述有机发光器件中，阴极层、有机发光介质层、及阳极层由下至上
依次设于所述基板上。
本发明还提供一种有机发光显示装置，包括基板、及设于基板上的有机发光器件；
所述有机发光器件包括阳极层、阴极层、及设于阳极层和阴极层之间的有机发光介质层；
所述有机发光介质层包括在所述阳极层靠近阴极层一侧依次设置的空穴注入层、空穴传输层、第一混合层、发光层、电子传输层、及电子注入层；
所述第一混合层为包含双极性主体材料和第一功能性掺杂材料的混合材料层；其中，所述双极性主体材料为具有同时传输空穴和电子功能的化合物；所述第一功能性掺杂材料为具有电子阻挡功能的材料、具有空穴控制功能的材料、或两者的组合；
其中，所述第一混合层的厚度为
其中掺杂的第一功能性掺杂材料的重量比例为1％-50％；
其中，所述基板为TFT基板；
所述有机发光器件中，阳极层、有机发光介质层、及阴极层由下至上依次设于所述基板上；或者，
所述有机发光器件中，阴极层、有机发光介质层、及阳极层由下至上依次设于所述基板上。
本发明的有益效果：本发明提供一种有机发光显示装置，其有机发光器件包括阳极层、阴极层、及设于阳极层和阴极层之间的有机发光介质层；所述有机发光介质层包括依次设置的空穴注入层、空穴传输层、第一混合层、发光层、电子传输层、及电子注入层；其中，所述第一混合层包含具有同时传输空穴和电子功能的双极性主体材料，并掺杂了具有电子阻挡功能的材料和具有空穴控制功能的材料中至少一种；可减少其有机发光器件中空穴和电子的载流子的注入势垒，控制载流子的注入速率和载流子复合区域的位置，提高载流子的复合效率，从而获得了高效率、长寿命的有机发光器件。
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明
的技术方案及其它有益效果显而易见。
附图中，
图1为本发明的有机发光显示装置第一实施例的结构示意图；
图2为本发明的有机发光显示装置第二实施例的结构示意图；
图3为本发明的有机发光显示装置第三实施例的结构示意图；
图4为本发明的有机发光显示装置第四实施例的结构示意图。
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1，为本发明的有机发光显示装置第一实施例的结构示意图，本实施例中，所述有机发光显示装置，包括基板100、及设于基板100上的有机发光器件200；
所述有机发光器件200包括阳极层201、阴极层202、及设于阳极层201和阴极层202之间的有机发光介质层210；
所述有机发光介质层210包括在所述阳极层201靠近阴极层202一侧依次设置的空穴注入层203、空穴传输层204、第一混合层205、发光层206、电子传输层207、及电子注入层208；
所述第一混合层205为包含双极性主体材料和第一功能性掺杂材料的混合材料层；其中，所述双极性主体材料为具有同时传输空穴和电子功能的化合物，该双极性主体材料可以同时传输空穴和电子，例如，所述双极性主体材料可以为4,7-di-carbazol-9-yl-[1,10]-phenanthroline(简写BUPH1)、2,5-BIS(2-(9H-carbazol-9-yl)phenyl)-1,3,4-oxadiazole(简写o-CzOXD)、或N-(4-diphenylphosph-oryphenyl carbazole(简写MOP12)等。
所述第一功能性掺杂材料为具有电子阻挡功能的材料、具有空穴控制功能的材料、或两者的组合；即所述第一混合层205中可以掺杂具有电子阻挡功能的材料，以阻挡从阴极202注入的电子穿过发光层206到达空穴传输层204一侧；或者，
所述第一混合层205中也可以掺杂具有空穴控制功能的材料，以控制空穴载流子从空穴传输层204注入到发光层206的速率；又或者，
所述第一混合层205中也可以同时掺杂具有电子阻挡功能的材料和具有空穴控制功能的材料，同时实现阻挡从阴极202注入的电子穿过发光层206到达空穴传输层204一侧和控制空穴载流子从空穴传输层204注入到发光层206的速率。
具体地，所述空穴传输层204的材料具有空穴传输功能，为空穴传输材料；所述空穴注入层203的材料具有空穴注入功能，为空穴注入材料；所述空穴传输层204的材料具有比所述空穴注入层203的材料大的或者相等的电离电势。所述电子传输层207的材料具有电子传输功能，为电子传输材料；所述电子注入层208的材料具有电子注入功能，为电子注入材料。
具体地，所述第一混合层205中，具有电子阻挡功能的材料具有比空穴传输材料和电子传输材料更大的最高占有分子轨道(HOMO)和最低未占有分子轨道(LUMO)能级差；具有空穴控制功能的材料具有比空穴传输材料更慢的空穴迁移率。
具体地，所述第一混合层205的厚度为
其中掺杂的第一功能性掺杂材料的重量比例为1％-50％；即当所述第一功能性掺杂材料为具有电子阻挡功能的材料时，所述具有电子阻挡功能的材料掺杂在第一混合层205中的重量比例为1％-50％；当所述第一功能性掺杂材料为具有空穴控制功能的材料时，所述具有空穴控制功能的材料掺杂在第一混合层205中的重量比例为1％-50％；当所述第一功能性掺杂材料为具有电子阻挡功能的材料和具有空穴控制功能的材料的组合时，所述具有电子阻挡功能的材料和具有空穴控制功能的材料掺杂在第一混合层205的重量比例均为1％-50％，且两者的总和在第一混合层205的重量比例也为1％-50％。
具体地，所述基板100为TFT基板；所述基板100可以为刚性基板，也可以为柔性基板。
具体地，所述有机发光器件200可以为正置器件，其中，阳极层201、有机发光介质层210、及阴极层202由下至上依次设于所述基板100上；所述有机发光介质层210中的空穴注入层203可通过真空蒸镀法(Vacuum Evaporation)、喷墨打印法(Ink-jet Printing)、刮刀涂布法(Blade Coating)、旋涂法(Spin-Coating)、网印法(Screen Printing)等方法在所述基板100上的阳极层201上制作形成，对于小分子材料的空穴注入层203优先选择真空蒸镀法制作形成。
具体地，所述有机发光介质层210中的其他有机化合物薄膜，空穴传输层204、第一混合层205、发光层206、电子传输层207、及电子注入层208也可采用如空穴注入层203的制作方法制作形成，均可通过真空蒸镀法、喷墨打印法、刮刀涂布法、旋涂法、或网印法制作形成。
或者，所述有机发光器件200也可以为倒置器件，其中，阴极层202、有机发光介质层210、及阳极层201由下至上依次设于所述基板100上。
具体地，所述有机发光器件200可以为红、绿、蓝、以及其他各颜色
的有机发光器件。
具体地，所述有机发光器件200可以为从基板100发射光的底发射发光器件，也可以为从背离基板100的一侧发射光的顶发射发光器件。
本发明的有机发光显示装置，通过在其有机发光器件200中搭配不同功能的有机化合物薄膜，减少有机发光器件中载流子(空穴和电子)的注入势垒，控制载流子的注入速率和载流子复合区域的位置，提高载流子的复合效率，从而获得了高效率、长寿命的有机发光器件200。
请参阅图2，为本发明的有机发光显示装置第二实施例的结构示意图，本实施例与上述第一实施例相比，所述有机发光介质层210还包括设于所述发光层206和电子传输层207之间的第二混合层209；所述第二混合层209同所述第一混合层205一样也包含可以同时传输空穴和电子的双极性主体材料。所述发光层206同样也包含双极性主体材料，且其中掺杂了发光掺杂剂而具有发光功能；从而，所述第一混合层205、发光层206、及第二混合层209共同构成了混合层组220，分别作为所述混合层组220中的第一段、第二段、及第三段。
具体地，所述发光层206中的发光掺杂剂为三重激发态磷光发光、单重激发态荧光发光、或热激活延迟荧光发光。
具体地，所述混合层组220中，第一混合层205的厚度、第二混合层209的厚度各占整个混合层组220的厚度比例均不超过1/3。
具体地，所述第二混合层209的厚度为
请参阅图3，为本发明的有机发光显示装置第三实施例的结构示意图，本实施例与上述第一实施例相比，所述有机发光介质层210还包括设于所述发光层206和电子传输层207之间的第二混合层209；所述第二混合层209同所述第一混合层205一样也包含可以同时传输空穴和电子的双极性主体材料，且其中还掺杂了第二功能性掺杂材料；所述第二功能性掺杂材料为具有空穴阻挡功能的材料、具有电子控制功能的材料、或两者的组合；即所述第二混合层209中可以掺杂具有空穴阻挡功能的材料，以阻挡从阳极201注入的空穴穿过发光层206到达电子传输层207一侧；或者，
所述第二混合层209中也可以掺杂具有电子控制功能的材料，以控制电子载流子从电子传输层207注入到发光层206的速率；又或者，
所述第二混合层209中也可以同时掺杂具有空穴阻挡功能的材料和具有电子控制功能的材料，同时阻挡从阳极201注入的空穴穿过发光层206到达电子传输层207一侧和控制电子载流子从电子传输层207注入到发光层206的速率。
具体地，所述第二混合层209中，具有空穴阻挡功能的材料具有比空穴传输材料和电子传输材料更大的最高占有分子轨道和最低未占有分子轨道能级差，具有电子控制功能的材料具有比电子传输材料更慢的电子迁移率。
具体地，所述第二混合层209的厚度为
其中掺杂的第二功能性掺杂材料的重量比例为1％-50％；即当所述第二功能性掺杂材料为具有空穴阻挡功能的材料时，所述具有空穴阻挡功能的材料掺杂在第二混合层209中的重量比例为1％-50％；当所述第二功能性掺杂材料为具有电子控制功能的材料时，所述具有电子控制功能的材料掺杂在第二混合层209中的重量比例为1％-50％；当所述第二功能性掺杂材料为具有空穴阻挡功能的材料和具有电子控制功能材料的组合时，所述具有空穴阻挡功能的材料和具有电子控制功能的材料掺杂在第二混合层209的重量比例均为1％-50％，且两者的总和在第二混合层209的重量比例也为1％-50％。
请参阅图4，为本发明的有机发光显示装置第四实施例的结构示意图，本实施例与上述第三实施例相比，所述发光层206同样也包含双极性主体材料，且其中掺杂了发光掺杂剂而具有发光功能；从而，所述第一混合层205、发光层206、及第二混合层209共同构成了混合层组220，分别作为所述混合层组220中的第一段、第二段、及第三段。
具体地，所述发光层206中的发光掺杂剂为三重激发态磷光发光、单重激发态荧光发光、或热激活延迟荧光发光。
具体地，所述混合层组220中，第一混合层205的厚度、第二混合层209的厚度各占整个混合层组220的厚度比例均不超过1/3。
综上所述，本发明提供的一种有机发光显示装置，其有机发光器件包括阳极层、阴极层、及设于阳极层和阴极层之间的有机发光介质层；所述有机发光介质层包括依次设置的空穴注入层、空穴传输层、第一混合层、发光层、电子传输层、及电子注入层；其中，所述第一混合层包含具有同时传输空穴和电子功能的双极性主体材料，并掺杂了具有电子阻挡功能的材料和具有空穴控制功能的材料中至少一种；可减少其有机发光器件中空穴和电子的载流子的注入势垒，控制载流子的注入速率和载流子复合区域的位置，提高载流子的复合效率，从而获得了高效率、长寿命的有机发光器件。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。
Claims (18)
- 一种有机发光显示装置，包括基板、及设于基板上的有机发光器件；所述有机发光器件包括阳极层、阴极层、及设于阳极层和阴极层之间的有机发光介质层；所述有机发光介质层包括在所述阳极层靠近阴极层一侧依次设置的空穴注入层、空穴传输层、第一混合层、发光层、电子传输层、及电子注入层；所述第一混合层为包含双极性主体材料和第一功能性掺杂材料的混合材料层；其中，所述双极性主体材料为具有同时传输空穴和电子功能的化合物；所述第一功能性掺杂材料为具有电子阻挡功能的材料、具有空穴控制功能的材料、或两者的组合。
- 如权利要求1所述的有机发光显示装置，其中，所述有机发光介质层还包括设于所述发光层和电子传输层之间的第二混合层；所述第二混合层包含双极性主体材料。
- 如权利要求2所述的有机发光显示装置，其中，所述第二混合层为还包含第二功能性掺杂材料的混合材料层；其中，所述第二功能性掺杂材料为具有空穴阻挡功能的材料、具有电子控制功能的材料、或两者的组合。
- 如权利要求2所述的有机发光显示装置，其中，所述发光层为包含双极性主体材料和发光掺杂剂的混合材料层；所述第一混合层、发光层、及第二混合层共同构成了混合层组；所述第一混合层的厚度、第二混合层的厚度各占整个混合层组的厚度比例均不超过1/3。
- 如权利要求4所述的有机发光显示装置，其中，所述发光掺杂剂为三重激发态磷光发光、单重激发态荧光发光、或热激活延迟荧光发光。
- 如权利要求1所述的有机发光显示装置，其中，所述第一混合层的厚度为其中掺杂的第一功能性掺杂材料的重量比例为1％-50％。
- 如权利要求2所述的有机发光显示装置，其中，所述第二混合层的厚度为
- 如权利要求3所述的有机发光显示装置，其中，所述第二混合层中掺杂的第二功能性掺杂材料的重量比例为1％-50％。
- 如权利要求2所述的有机发光显示装置，其中，所述有机发光介质层中的空穴注入层、空穴传输层、第一混合层、发光层、电子传输层、电 子注入层、及第二混合层均通过真空蒸镀法、喷墨打印法、刮刀涂布法、旋涂法、或网印法制作形成。
- 如权利要求1所述的有机发光显示装置，其中，所述基板为TFT基板；所述有机发光器件中，阳极层、有机发光介质层、及阴极层由下至上依次设于所述基板上；或者，所述有机发光器件中，阴极层、有机发光介质层、及阳极层由下至上依次设于所述基板上。
- 一种有机发光显示装置，包括基板、及设于基板上的有机发光器件；所述有机发光器件包括阳极层、阴极层、及设于阳极层和阴极层之间的有机发光介质层；所述有机发光介质层包括在所述阳极层靠近阴极层一侧依次设置的空穴注入层、空穴传输层、第一混合层、发光层、电子传输层、及电子注入层；所述第一混合层为包含双极性主体材料和第一功能性掺杂材料的混合材料层；其中，所述双极性主体材料为具有同时传输空穴和电子功能的化合物；所述第一功能性掺杂材料为具有电子阻挡功能的材料、具有空穴控制功能的材料、或两者的组合；其中，所述第一混合层的厚度为其中掺杂的第一功能性掺杂材料的重量比例为1％-50％；
其中，所述基板为TFT基板；所述有机发光器件中，阳极层、有机发光介质层、及阴极层由下至上依次设于所述基板上；或者，所述有机发光器件中，阴极层、有机发光介质层、及阳极层由下至上依次设于所述基板上。 - 如权利要求11所述的有机发光显示装置，其中，所述有机发光介质层还包括设于所述发光层和电子传输层之间的第二混合层；所述第二混合层包含双极性主体材料。
- 如权利要求12所述的有机发光显示装置，其中，所述第二混合层为还包含第二功能性掺杂材料的混合材料层；其中，所述第二功能性掺杂材料为具有空穴阻挡功能的材料、具有电子控制功能的材料、或两者的组合。
- 如权利要求12所述的有机发光显示装置，其中，所述发光层为包 含双极性主体材料和发光掺杂剂的混合材料层；所述第一混合层、发光层、及第二混合层共同构成了混合层组；所述第一混合层的厚度、第二混合层的厚度各占整个混合层组的厚度比例均不超过1/3。
- 如权利要求14所述的有机发光显示装置，其中，所述发光掺杂剂为三重激发态磷光发光、单重激发态荧光发光、或热激活延迟荧光发光。
- 如权利要求12所述的有机发光显示装置，其中，所述第二混合层的厚度为
- 如权利要求13所述的有机发光显示装置，其中，所述第二混合层中掺杂的第二功能性掺杂材料的重量比例为1％-50％。
- 如权利要求12所述的有机发光显示装置，其中，所述有机发光介质层中的空穴注入层、空穴传输层、第一混合层、发光层、电子传输层、电子注入层、及第二混合层均通过真空蒸镀法、喷墨打印法、刮刀涂布法、旋涂法、或网印法制作形成。
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| CN108538894B (zh) * | 2018-04-24 | 2021-05-25 | 京东方科技集团股份有限公司 | 一种有机电致发光器件、发光装置 |
| CN108550614B (zh) * | 2018-05-31 | 2020-03-13 | 上海天马有机发光显示技术有限公司 | 有机发光显示面板及其显示装置 |
| CN108963093B (zh) * | 2018-06-29 | 2020-05-08 | 云谷（固安）科技有限公司 | 有机电致发光器件和有机电致发光装置 |
| CN109273614A (zh) * | 2018-09-03 | 2019-01-25 | 云谷（固安）科技有限公司 | 一种有机电致发光器件和显示装置 |
| CN109390486A (zh) * | 2018-09-03 | 2019-02-26 | 云谷（固安）科技有限公司 | 一种有机电致发光器件和显示装置 |
| CN109256474B (zh) * | 2018-09-03 | 2021-11-16 | 云谷（固安）科技有限公司 | 一种有机电致发光器件和显示装置 |
| CN109360897B (zh) * | 2018-09-17 | 2021-01-15 | 云谷（固安）科技有限公司 | 一种显示面板及显示装置 |
| CN109326735B (zh) * | 2018-09-30 | 2021-01-01 | 云谷（固安）科技有限公司 | 一种有机发光二极管、显示面板和显示装置 |
| CN109390487A (zh) * | 2018-09-30 | 2019-02-26 | 云谷（固安）科技有限公司 | 一种有机发光二极管、显示面板和显示装置 |
| CN110707227A (zh) * | 2019-10-17 | 2020-01-17 | 昆山国显光电有限公司 | 一种发光器件和显示面板 |
| 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 |
| CN110982347A (zh) * | 2019-12-16 | 2020-04-10 | 深圳市华星光电半导体显示技术有限公司 | 用于喷墨打印有机发光二极管的墨水组合物及其制造方法 |
| US11441045B2 (en) | 2019-12-16 | 2022-09-13 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Ink composition for inkjet printing organic light-emitting diodes and method of manufacturing the same |
| CN111063818A (zh) | 2019-12-26 | 2020-04-24 | 武汉华星光电半导体显示技术有限公司 | 显示面板及其制备方法 |
| CN111864097A (zh) * | 2020-07-28 | 2020-10-30 | 吉林奥来德光电材料股份有限公司 | 一种有机电致发光器件及其显示装置 |
| CN111900257A (zh) * | 2020-08-12 | 2020-11-06 | 京东方科技集团股份有限公司 | 一种发光器件及其制作方法、显示装置 |
| CN111933812B (zh) * | 2020-08-17 | 2024-01-26 | 云谷（固安）科技有限公司 | 显示面板 |
| CN112467046A (zh) * | 2020-12-02 | 2021-03-09 | 吉林奥来德光电材料股份有限公司 | 一种有机电致发光器件及其制备方法和显示装置 |
| CN113066934B (zh) * | 2021-03-12 | 2023-05-09 | 武汉华星光电半导体显示技术有限公司 | 显示面板以及移动终端 |
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