WO2016115775A1 - Oled彩色显示器件 - Google Patents

Oled彩色显示器件 Download PDF

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WO2016115775A1
WO2016115775A1 PCT/CN2015/075673 CN2015075673W WO2016115775A1 WO 2016115775 A1 WO2016115775 A1 WO 2016115775A1 CN 2015075673 W CN2015075673 W CN 2015075673W WO 2016115775 A1 WO2016115775 A1 WO 2016115775A1
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light
layer
emitting layer
green
blue
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PCT/CN2015/075673
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French (fr)
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刘亚伟
王宜凡
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深圳市华星光电技术有限公司
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Priority to US14/655,720 priority Critical patent/US10038042B2/en
Publication of WO2016115775A1 publication Critical patent/WO2016115775A1/zh

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Definitions

  • the present invention relates to the field of display technologies, and in particular, to an OLED color display device.
  • OLED Organic Light Emitting Diode
  • LCD liquid crystal display
  • the OLED generally includes: a substrate, an anode disposed on the substrate, a hole injection layer (HIL) disposed on the anode, and a hole transport layer disposed on the hole injection layer (Hole Transport Layer, HTL), an emitter layer placed on the hole transport layer, an electron transport layer (ETL) placed on the light-emitting layer, and an electron injection layer (Electron Injection Layer, EIL) placed on the electron transport layer And a cathode placed on the electron injection layer.
  • the luminescent layer usually employs a host/guest doping system.
  • one is red, green, blue (Red, Green, Blue, RGB), which is represented by Samsung.
  • This technology is only suitable for organic small molecular materials that are easy to sublimate.
  • the advantage is that the process is simple and mature, and the operation is simple.
  • the productivity is low and the cost is low. It is higher, and because of the large difference in lifetime, excitation rate and attenuation of the three primary colors, it is easy to cause color cast of the OLED color display device.
  • the other is white light + RGB filter (Color Filter, CF) technology, represented by LG. Since the mature CF technology of the LCD can be utilized, the mask alignment is not required, the evaporation process is greatly simplified, the production cost can be reduced, and the large-size high-resolution OLED can be prepared.
  • RGB filter Color Filter
  • the light-emitting layer is not doped with an electron transporting material to make the light-emitting position away from the interface between the light-emitting layer and the electron transport layer, resulting in lower energy efficiency and higher energy consumption.
  • the object of the present invention is to provide an OLED color display device which has high energy efficiency and luminous efficiency and low energy consumption.
  • the present invention provides an OLED color display device including a substrate, an anode formed on the substrate, a thin film transistor array formed on the anode, and hole injection formed on the thin film transistor array a layer, a hole transport layer formed on the hole injection layer, a light-emitting layer formed on the hole transport layer, an electron transport layer formed on the light-emitting layer, and formed on the electron transport layer a cathode cover, a package cover plate disposed above the cathode and bonding to the substrate, a color conversion layer formed on the inside of the package cover, and a sealant frame for bonding the substrate and the package cover;
  • the light emitting layer includes a first light emitting layer and a second light emitting layer, wherein the first light emitting layer and the second light emitting layer are each made of a host material doped guest material, the guest material including a light emitting material, and electron transport a material; the first luminescent layer is a blue luminescent layer, the second luminescent layer is a red-green common luminescent layer, a yellow luminescent layer, or a green luminescent layer; the first luminescent layer and the second illuminating layer The light emitted by the layer is jointly synthesized into white light or cyan light;
  • the color conversion layer includes a blue filter unit, a green filter unit, and a red conversion unit that are disposed at intervals; the white or cyan light is filtered into blue light via the blue filter unit, and the green filter unit is The color is filtered to be green light, and converted into red light by the red conversion unit, thereby realizing color display.
  • the ratio of the host material to the guest material is 8:1 to 20:1, and the ratio of the luminescent material to the electron transporting material in the guest material is 1:1 to 10:1.
  • the color conversion layer further includes a blank light transmitting unit, and the white light or cyan light is still white light or cyan light after being transmitted through the blank light transmitting unit.
  • the host material is an organic blue light host material, and the light-emitting material and the electron transport material in the guest material are respectively a blue fluorescent dopant and an electron transporting dopant;
  • the host material is an organic blue host material or an organic green light host material, and the luminescent material and the electron transport material in the guest material are respectively a phosphorescent dopant and an electron transporting dopant.
  • the phosphorescent dopant is a red or green phosphorescent co-dopant or a yellow phosphorescent dopant, such that the blue fluorescent light emitted by the first luminescent layer and the red-green phosphorescent light emitted by the second luminescent layer or the yellow phosphorescent synthetic white light
  • the phosphorescent dopant is a green phosphorescent dopant such that the blue phosphor emitted by the first emissive layer and the green phosphor emitted by the second emissive layer are combined into cyan light.
  • the light emitting layer further includes a spacer layer disposed between the first light emitting layer and the second light emitting layer, the spacer layer is composed of a host material doped electron transport material, and the host material is an organic blue light host material Or organic green light body material.
  • the material of the substrate and the package cover is glass or a flexible material, and at least one of the substrate and the package cover is transparent.
  • the organic blue host material is 4,4',4"-tris(carbazol-9-yl)triphenylamine, or 2,4,6,-tris(9H-carbazol-9-yl)-1,3 , 5-triazine;
  • the organic green light host material is 3,3'-(1,3-phenyl)bis(7-ethoxy-4-methylcoumarin);
  • the dopant is polyfluorene, 4,4'-bis(2,2-distyryl)biphenyl, or FIr6;
  • the red and green phosphorescent co-dopants include red phosphorescent dopant and green phosphorescence doping
  • the red phosphorescent dopant is tris(1-phenyl-isoquinoline) ruthenium (III);
  • the green phosphorescent dopant is tris(2-phenylpyridine) ruthenium; the yellow phosphorescence
  • the dopant is bis(2,3-diphenylpyrazin
  • the light-emitting layer is formed by vacuum thermal evaporation or solution film formation.
  • the material of the electron transport layer is octahydroxyquinoline aluminum, and the material of the hole transport layer is polytriphenylamine.
  • the present invention also provides an OLED color display device, comprising: a substrate, an anode formed on the substrate, a thin film transistor array formed on the anode, a hole injection layer formed on the thin film transistor array, formed on a hole transport layer on the hole injection layer, a light-emitting layer formed on the hole transport layer, an electron transport layer formed on the light-emitting layer, a cathode formed on the electron transport layer, and a cathode a package cover plate over the cathode and bonding to the substrate, a color conversion layer formed on the inside of the package cover, and a sealant frame bonding the substrate and the package cover;
  • the light emitting layer includes a first light emitting layer and a second light emitting layer, wherein the first light emitting layer and the second light emitting layer are each made of a host material doped guest material, the guest material including a light emitting material, and electron transport a material; the first luminescent layer is a blue luminescent layer, the second luminescent layer is a red-green common luminescent layer, a yellow luminescent layer, or a green luminescent layer; the first luminescent layer and the second illuminating layer The light emitted by the layer is jointly synthesized into white light or cyan light;
  • the color conversion layer includes a blue filter unit, a green filter unit, and a red conversion unit that are disposed at intervals; the white or cyan light is filtered into blue light via the blue filter unit, and the green filter unit is Filtering into green light, converting into red light via the red conversion unit, thereby realizing color display;
  • the ratio of the host material to the guest material is 8:1 to 20:1, and the ratio of the luminescent material to the electron transport material in the guest material is 1:1 to 10:1;
  • the color conversion layer further includes a blank light transmitting unit, and the white light or cyan light is still white light or cyan light after being transmitted through the blank light transmitting unit;
  • the luminescent layer further includes an interval disposed between the first luminescent layer and the second luminescent layer a layer, the spacer layer being composed of a host material doped electron transport material, the host material being an organic blue host material or an organic green light host material;
  • the material of the substrate and the package cover is glass or a flexible material, and at least one of the substrate and the package cover is transparent;
  • the luminescent layer is formed by vacuum thermal evaporation or solution film formation
  • the material of the electron transport layer is octahydroxyquinoline aluminum
  • the material of the hole transport layer is polytriphenylamine
  • An OLED color display device provided by the present invention has an illuminating layer including a first luminescent layer and a second luminescent layer, and a blue luminescent material having a large energy band gap and a red-green luminescent material, yellow light
  • the luminescent material or the green luminescent material is respectively disposed in the first and second luminescent layers to realize layered luminescence, and then synthesizes white light or cyan light, has high energy efficiency, and is respectively doped in the first and second luminescent layers.
  • the electron transport material is introduced to help the electron transmission, and the light-emitting position is away from the interface between the light-emitting layer and the electron transport layer, thereby avoiding the quenching of the excitons, effectively improving the luminous efficiency of the OLED color display device and reducing the energy consumption.
  • FIG. 1 is a schematic structural view of a first embodiment of an OLED color display device according to the present invention.
  • FIG. 2 is a schematic view showing a first structure of a light-emitting layer in an OLED color display device of the present invention
  • FIG. 3 is a schematic view showing a second structure of a light-emitting layer in an OLED color display device of the present invention.
  • FIG. 4 is a schematic diagram of a driving circuit of one pixel in FIG. 1;
  • FIG. 5 is a schematic diagram of a pixel arrangement of a first embodiment of an OLED color display device according to the present invention.
  • FIG. 6 is a schematic structural view of a second embodiment of an OLED color display device according to the present invention.
  • FIG. 7 is a schematic diagram of a driving circuit of one pixel in FIG. 6;
  • FIG. 8 is a schematic diagram of a pixel arrangement of a second embodiment of an OLED color display device according to the present invention.
  • FIG. 9 is a schematic view showing another pixel arrangement of the second embodiment of the color display device of the present invention.
  • FIG. 1 is a schematic structural view of a first embodiment of an OLED color display device according to the present invention, comprising a substrate 1, an anode 11 formed on the substrate 1, and a thin film transistor array formed on the anode 11 ( Thin Film Transistor (TFT) 21, a hole injection layer 22 formed on the thin film transistor array 21, a hole transport layer 23 formed on the hole injection layer 22, and a hole transport layer 23 formed on the hole transport layer 23 a light-emitting layer 3 thereon, an electron transport layer 24 formed on the light-emitting layer 3, a cathode 12 formed on the electron transport layer 24, and a cathode electrode 12 disposed above the cathode 12 and attached to the substrate 1 a package cover 2, a color conversion layer 4 formed on the inside of the package cover 2, and a sealant frame 5 for bonding the substrate 1 and the package cover 2.
  • TFT Thin Film Transistor
  • the light emitting layer 3 includes a first light emitting layer 31 and a second light emitting layer 32 .
  • the first luminescent layer 31 is a blue luminescent layer
  • the second luminescent layer 32 is a red-green common luminescent layer, a yellow luminescent layer, or a green luminescent layer.
  • the first luminescent layer 31 and the light emitted by the second luminescent layer 32 jointly synthesize white light or cyan light.
  • the color conversion layer 4 includes a blue filter unit 41, a green filter unit 42, and a red conversion unit 43 which are disposed at intervals.
  • the blue filter unit 41 and the green filter unit 42 are filtered by a color filter (CF) principle to obtain blue light and green light.
  • the red conversion unit 43 performs color conversion of light using a color change material (CCM).
  • CCM color change material
  • the material of the substrate 1 and the package cover 2 may be glass or a flexible material, at least one of which is to be transparent.
  • the substrate 1 and the package cover 2 are glass plates.
  • the sealant frame 5 can prevent external water vapor and oxygen from entering and protect internal components.
  • the material of the hole transport layer 23 is polytriphenylamine (poly-TPD), and the material of the electron transport layer 24 is octahydroxyquinoline aluminum (Alq 3 ).
  • the first luminescent layer 31 and the second luminescent layer 32 are each made of a host material doped with a guest material, the guest material comprising a luminescent material, and an electron transporting material, the electron transporting material being capable of increasing The role of the electron transfer rate.
  • the ratio of the host material to the guest material is 8:1 to 20:1, and the ratio of the luminescent material to the electron transporting material in the guest material is 1:1 to 10:1.
  • the host material is an organic blue light host material, and the light-emitting material and the electron transport material in the guest material are respectively a blue fluorescent dopant and an electron transporting dopant.
  • the host material is an organic blue host material or an organic green light host material, and the luminescent material and the electron transport material in the guest material are respectively Phosphorescent dopants, and electron transport dopants.
  • the phosphorescent dopant may be a red or green phosphorescent co-dopant or a yellow phosphorescent dopant such that the blue fluorescent light emitted by the first luminescent layer 31 and the red-green phosphorescent light emitted by the second luminescent layer 32, or yellow Phosphorescence synthesizes white light.
  • the phosphorescent dopant may also be a green phosphorescent dopant such that the blue fluorescent light emitted by the first light emitting layer 31 and the green phosphorescent light emitted by the second light emitting layer 32 are combined into cyan light.
  • the luminescent layer 3 may also include a first luminescent layer 31 and a second luminescent layer 32, as well as a first luminescent layer 31 and a second luminescent layer 32, as shown in FIG. Between the spacer layers 33.
  • the spacer layer 33 is composed of a host material doped electron transport material, which may be an organic blue host material or an organic green light host material.
  • the spacer layer 33 functions to separate the first luminescent layer 31 from the second luminescent layer 32 such that excitons in the first luminescent layer 31 having a blue fluorescent dopant and a phosphorescent dopant The excitons in the two light-emitting layers 32 do not affect each other.
  • organic blue host material may be 4,4',4"-tris(carbazol-9-yl)triphenylamine (TCTA), and the molecular formula is:
  • the organic green light host material may be 3,3'-(1,3-phenyl)bis(7-ethoxy-4-methylcoumarin) (mEMCB) having the formula:
  • the blue fluorescent dopant may be polyfluorene, 4,4'-bis(2,2-distyryl)biphenyl. (DPVBi), or FIr6.
  • the red and green phosphorescent co-dopants include a red phosphorescent dopant and a green phosphorescent dopant.
  • the red phosphorescent dopant may be tris(1-phenyl-isoquinoline) ruthenium (III) (Ir(piq) 3 ), and the molecular formula is:
  • the green phosphorescent dopant may be tris(2-phenylpyridine) ruthenium (Ir(ppy) 3 ), and the molecular formula is:
  • the yellow phosphorescent dopant may be bis(2,3-diphenylpyrazine)-acetylacetonate ruthenium (Ir(dphp) 2 (acac)), and the molecular formula is:
  • the electron transporting dopant may be 2-(4'-tert-butylphenyl)-5-(4"-biphenyl)-1,3,4-oxadiazole (PBD) having the formula:
  • the light-emitting layer 3 may be formed by vacuum thermal evaporation or solution film formation.
  • the luminescent layer 3 is disposed as the first luminescent layer 31 and the second luminescent layer 32, and the blue luminescent material having a large energy band gap and the red-green luminescent material, the yellow luminescent material, or the green luminescent material are respectively disposed at the first
  • the second luminescent layer 31, 32 can realize layered illuminating, and then synthesize white light or cyan light, The energy efficiency is high, and the electron transport material is incorporated into the first and second light-emitting layers 31 and 32, respectively, which can facilitate electron transport while keeping the light-emitting position away from the interface between the light-emitting layer 3 and the electron transport layer 24, thereby avoiding The quenching of excitons effectively improves the luminous efficiency of OLED color display devices and reduces energy consumption.
  • the blue filter unit 41, the green filter unit 42, and the red conversion unit 43 correspond to a pixel
  • the pixel includes a red sub-pixel 83 and a green sub-pixel 82.
  • blue sub-pixel 81 corresponds to the red conversion unit 43 corresponds to the red sub-pixel 83 in the pixel
  • the green filter unit 42 corresponds to the green sub-pixel 82 in the pixel and the blue sub-pixel 81 in the corresponding pixel of the blue filter unit 41.
  • the red sub-pixel 83, the green sub-pixel 82, and the blue sub-pixel 81 respectively correspond to one TFT to control whether or not the area of the light-emitting layer 3 corresponding to each sub-pixel is illuminated.
  • the white light or the cyan light emitted from the light-emitting layer 3 is filtered into blue light via the blue filter unit 41; when the TFT control corresponds to the green sub-pixel 82
  • the region of the light-emitting layer 3 emits light
  • the white light or the cyan light emitted from the region of the light-emitting layer 3 is filtered to be green light by the green filter unit 42; when the TFT controls the region corresponding to the light-emitting layer 3 of the red sub-pixel 83, the light is emitted.
  • the white light or the cyan light emitted from the layer 3 region is converted into red light by the red converting unit 43, thereby realizing the display of the three primary colors of red, green, and blue, and superimposing various colors to realize color display.
  • FIG. 5 is a schematic diagram of a pixel arrangement of a first embodiment of an OLED color display device according to the present invention.
  • the pixel arrangement of each adjacent upper and lower rows is exactly the same, and the red sub-pixel 83 , the green sub-pixel 82 , and the blue
  • the sub-pixels 81 are sequentially spaced from left to right in the horizontal direction.
  • FIG. 6 is a schematic structural diagram of a second embodiment of an OLED color display device according to the present invention.
  • the color conversion layer 4 further includes a blank light transmitting unit 40.
  • the white light or cyan light is still white after being transmitted through the blank light transmitting unit 40.
  • Cyan light can increase the brightness of OLED color display devices.
  • the blue filter unit 41, the green filter unit 42, the red conversion unit 43, and the blank light transmitting unit 40 correspond to a pixel, and the pixel includes a red sub-pixel. 83.
  • the red conversion unit 43 corresponds to the red sub-pixel 83 in the pixel
  • the green filter unit 42 corresponds to the green sub-pixel 82 in the pixel and the blue sub-pixel 81 in the corresponding pixel of the blue filter unit 41.
  • the blank light transmitting unit 40 corresponds to the white or cyan sub-pixel 80 in the pixel.
  • the red sub-pixel 83, the green sub-pixel 82, the blue sub-pixel 81, and the white or cyan sub-pixel 80 respectively correspond to one TFT, so as to control whether the area of the corresponding light-emitting layer 3 of each sub-pixel is illuminated.
  • FIG. 8 is a pixel row diagram of a second embodiment of an OLED color display device according to the present invention.
  • the arrangement of pixels in each of the adjacent upper and lower rows is exactly the same, and the red sub-pixel 83, the green sub-pixel 82, the blue sub-pixel 81, and the white or cyan sub-pixel 80 are sequentially arranged from left to right in the horizontal direction. Interval setting.
  • FIG. 9 is another schematic diagram of pixel arrangement in the second embodiment.
  • the red sub-pixel 83 , the green sub-pixel 82 , the blue sub-pixel 81 , and the white or cyan sub-pixel 80 are sequentially clockwise. Interval setting. Therefore, the technical effect of the present invention is applicable to the OLED color display device of different pixel arrangement modes regardless of the arrangement manner of each sub-pixel of the pixel.
  • the OLED color display device of the present invention has a light-emitting layer including a first light-emitting layer and a second light-emitting layer, and a blue light-emitting material having a large energy band gap, a red-green light-emitting material, a yellow light-emitting material, or a green color.
  • the light emitting materials are respectively disposed in the first and second light emitting layers to realize layered light emission, and then synthesize white light or cyan light, have high energy efficiency, and respectively incorporate the electron transport materials in the first and second light emitting layers, It helps the electron transmission while keeping the light-emitting position away from the interface between the light-emitting layer and the electron transport layer, avoiding the quenching of the excitons, effectively improving the luminous efficiency of the OLED color display device and reducing the energy consumption.

Abstract

一种OLED彩色显示器件，包括基板(1)、阳极(11)、薄膜晶体管阵列(21)、空穴注入层(22)、空穴传输层(23)、发光层(3)、电子传输层(24)、阴极(12)、封装盖板(2)、色彩转换层(4)、密封胶框(5)；发光层(3)包括第一发光层(31)和第二发光层(32)，第一发光层(31)、第二发光层(32)均由主体材料掺杂客体材料制成，客体材料包括发光材料与电子传输材料；第一发光层(31)为蓝光发光层，第二发光层(32)为红绿光共同发光层、黄光发光层或绿光发光层；第一发光层(31)与第二发光层(32)发射的光共同合成白光或青色光，具有较高的能量效率与发光效率，能耗低。

Description

OLED彩色显示器件 技术领域
本发明涉及显示技术领域，尤其涉及一种OLED彩色显示器件。
背景技术
有机发光二极管显示器件(Organic Light Emitting Diode，OLED)是一种极具发展前景的平板显示技术，它不仅具有十分优异的显示性能，还具有自发光、结构简单、超轻薄、响应速度快、宽视角、低功耗及可实现柔性显示等特性，被誉为“梦幻显示器”，再加上其生产设备投资远小于液晶显示器(Liquid Crystal Display，LCD)，得到了各大显示器厂家的青睐，已成为显示技术领域中第三代显示器件的主力军。
OLED一般包括：基板、置于基板上的阳极(Anode)、置于阳极上的空穴注入层(Hole Injection Layer，HIL)、置于空穴注入层上的空穴传输层(Hole Transport Layer，HTL)、置于空穴传输层上的发光层(Emitter)、置于发光层上的电子传输层(Electron Transport Layer，ETL)、置于电子传输层上的电子注入层(Electron Injection Layer，EIL)以及置于电子注入层上的阴极(Cathode)。为了提高效率，发光层通常采用主/客体掺杂系统。 目前，实现OLED的彩色化有几种技术路线：一种是红绿蓝(Red、Green、Blue，RGB)三基色发光，以三星公司为代表。该技术只适用于容易升华的有机小分子材料，其优点是工艺简单成熟，操作简便.但由于在制备高分辨率显示屏时需要高精度掩膜及精确的对位，导致产能较低、成本较高，而且由于三基色的寿命、激发率以及衰减度相差较大，容易造成OLED彩色显示器件的偏色。
另一种是白光+RGB滤光片(Color Filter，CF)技术，以LG公司为代表。由于可利用LCD成熟的CF技术，不需要掩膜对位，极大地简化了蒸镀过程，因而能降低生产成本，可用于制备大尺寸高分辨率OLED。
然而，在现有的白光+RGB滤光片的技术中，发光层均没有掺入电子传输材料以使发光位置远离发光层与电子传输层的界面，导致能量效率较低，能耗较高。
因此，有必要研发一种能量效率高、低能耗的OLED彩色显示器件。
发明内容
本发明的目的在于提供一种OLED彩色显示器件，具有较高的能量效率与发光效率，能耗低。
为实现上述目的，本发明提供一种OLED彩色显示器件，包括基板、形成于所述基板上的阳极、形成于所述阳极上的薄膜晶体管阵列、形成于所述薄膜晶体管阵列上的空穴注入层、形成于所述空穴注入层上的空穴传输层、形成于所述空穴传输层上的发光层、形成于所述发光层上的电子传输层、形成于所述电子传输层上的阴极、设于所述阴极上方并与所述基板相贴合的封装盖板、形成于所述封装盖板内侧的色彩转换层、及粘结所述基板与封装盖板的密封胶框；
所述发光层包括第一发光层、及第二发光层，所述第一发光层、及第二发光层均由主体材料掺杂客体材料制成，所述客体材料包括发光材料、与电子传输材料；所述第一发光层为蓝光发光层，所述第二发光层为红绿光共同发光层、黄光发光层、或绿光发光层；所述第一发光层与所述第二发光层发射的光共同合成白光或青色光；
所述色彩转换层包括间隔设置的蓝色滤光单元、绿色滤光单元、及红色转换单元；所述白光或青色光经由所述蓝色滤光单元过滤成为蓝光，经由所述绿色滤光单元过滤成为绿光，经由所述红色转换单元转换成为红光，从而实现彩色显示。
所述主体材料与客体材料的比例为8:1～20:1，所述客体材料中的发光材料与电子传输材料的比例为1:1～10:1。
所述色彩转换层还包括一空白透光单元，所述白光或青色光透过所述空白透光单元后仍为白光或青色光。
在所述第一发光层中，所述主体材料为有机蓝光主体材料，所述客体材料中的发光材料、及电子传输材料分别为蓝色荧光掺杂剂、及电子传输掺杂剂；在所述第二发光层中，所述主体材料为有机蓝光主体材料或有机绿光主体材料，所述客体材料中的发光材料、及电子传输材料分别为磷光掺杂剂、及电子传输掺杂剂。
所述磷光掺杂剂为红、绿色磷光共掺杂剂或黄色磷光掺杂剂，使得所述第一发光层发射的蓝色荧光与第二发光层发射的红绿色磷光、或黄色磷光合成白光；或所述磷光掺杂剂为绿色磷光掺杂剂，使得所述第一发光层发射的蓝色荧光与第二发光层发射的绿色磷光合成青色光。
所述发光层还包括一设于所述第一发光层、及第二发光层之间的间隔层，所述间隔层由主体材料掺杂电子传输材料组成，所述主体材料为有机蓝光主体材料或有机绿光主体材料。
所述基板与封装盖板的材料为玻璃或柔性材料，所述基板与封装盖板中至少有一个透光。
所述有机蓝光主体材料为4,4',4”-三(咔唑-9-基)三苯胺、或2，4，6，-三(9H-咔唑-9-基)-1,3,5-三嗪；所述有机绿光主体材料为3,3’-(1,3-苯基)双(7-乙氧基-4-甲基香豆素)；所述蓝色荧光掺杂剂为聚芴类、4,4’-双(2,2-二苯乙烯基)联苯、或FIr6；所述红、绿色磷光共掺杂剂包括红色磷光掺杂剂与绿色磷光掺杂剂；所述红色磷光掺杂剂为三(1-苯基-异喹啉)合铱(III)；所述绿色磷光掺杂剂为三(2-苯基吡啶)合铱；所述黄色磷光掺杂剂为二(2,3-二苯基吡嗪)-乙酰丙酮合铱；所述电子传输掺杂剂为2-(4'-叔丁基苯)-5-(4”-联苯基)-1,3,4-噁二唑。
所述发光层采用真空热蒸镀或溶液成膜的方式形成。
所述电子传输层的材料为八羟基喹啉铝，所述空穴传输层的材料为聚三苯胺。
本发明还提供一种OLED彩色显示器件，包括基板、形成于所述基板上的阳极、形成于所述阳极上的薄膜晶体管阵列、形成于所述薄膜晶体管阵列上的空穴注入层、形成于所述空穴注入层上的空穴传输层、形成于所述空穴传输层上的发光层、形成于所述发光层上的电子传输层、形成于所述电子传输层上的阴极、设于所述阴极上方并与所述基板相贴合的封装盖板、形成于所述封装盖板内侧的色彩转换层、及粘结所述基板与封装盖板的密封胶框；
所述发光层包括第一发光层、及第二发光层，所述第一发光层、及第二发光层均由主体材料掺杂客体材料制成，所述客体材料包括发光材料、与电子传输材料；所述第一发光层为蓝光发光层，所述第二发光层为红绿光共同发光层、黄光发光层、或绿光发光层；所述第一发光层与所述第二发光层发射的光共同合成白光或青色光；
所述色彩转换层包括间隔设置的蓝色滤光单元、绿色滤光单元、及红色转换单元；所述白光或青色光经由所述蓝色滤光单元过滤成为蓝光，经由所述绿色滤光单元过滤成为绿光，经由所述红色转换单元转换成为红光，从而实现彩色显示；
其中，所述主体材料与客体材料的比例为8:1～20:1，所述客体材料中的发光材料与电子传输材料的比例为1:1～10:1；
所述色彩转换层还包括一空白透光单元，所述白光或青色光透过所述空白透光单元后仍为白光或青色光；
所述发光层还包括一设于所述第一发光层与第二发光层之间的间隔 层，所述间隔层由主体材料掺杂电子传输材料组成，所述主体材料为有机蓝光主体材料或有机绿光主体材料；
其中，所述基板与封装盖板的材料为玻璃或柔性材料，所述基板与封装盖板中至少有一个透光；
其中，所述发光层采用真空热蒸镀或溶液成膜的方式形成；
其中，所述电子传输层的材料为八羟基喹啉铝，所述空穴传输层的材料为聚三苯胺。
本发明的有益效果：本发明提供的一种的OLED彩色显示器件，其发光层包括第一发光层与第二发光层，将能量带隙大的蓝光发光材料与红绿光发光材料、黄光发光材料、或绿光发光材料分别设于第一、第二发光层中实现分层发光，再合成白光或青色光，具有较高的能量效率，并且分别在第一、第二发光层中掺入电子传输材料，帮助电子传输，同时使发光位置远离发光层与电子传输层的界面，避免激子的淬灭，有效提高了OLED彩色显示器件的发光效率，降低能耗。
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。
附图说明
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他有益效果显而易见。
附图中，
图1为本发明OLED彩色显示器件第一实施例的结构示意图；
图2为本发明OLED彩色显示器件中发光层的第一种结构示意图；
图3为本发明OLED彩色显示器件中发光层的第二种结构的示意图；
图4为图1中一个像素的驱动电路示意图；
图5为本发明OLED彩色显示器件第一实施例的像素排布示意图；
图6为本发明OLED彩色显示器件第二实施例的结构示意图；
图7为图6中一个像素的驱动电路示意图；
图8为本发明OLED彩色显示器件第二实施例的一种像素排布示意图；
图9为本发明彩色显示器件第二实施例的另一种像素排布示意图。
具体实施方式
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，为本发明一种OLED彩色显示器件的第一实施例的结构示意图，包括基板1、形成于所述基板1上的阳极11、形成于所述阳极11上的薄膜晶体管阵列(Thin Film Transistor，TFT)21、形成于所述薄膜晶体管阵列21上的空穴注入层22、形成于所述空穴注入层22上的空穴传输层23、形成于所述空穴传输层23上的发光层3、形成于所述发光层3上的电子传输层24、形成于所述电子传输层24上的阴极12、设于所述阴极12上方并与所述基板1相贴合的封装盖板2、形成于所述封装盖板2内侧的色彩转换层4、及粘结所述基板1与封装盖板2的密封胶框5。
请参阅图2，所述发光层3包括第一发光层31、及第二发光层32。所述第一发光层31为蓝光发光层，所述第二发光层32为红绿光共同发光层、黄光发光层、或绿光发光层。所述第一发光层31与所述第二发光层32发射的光共同合成白光或青色光。
所述色彩转换层4包括间隔设置的蓝色滤光单元41、绿色滤光单元42、及红色转换单元43。所述蓝色滤光单元41、及绿色滤光单元42采用彩色滤光片(Color Filter,CF)原理进行滤光，得到蓝光、及绿光。所述红色转换单元43采用色转换材料(Color Change Material，CCM)进行光的色彩转换。所述白光或青色光经由所述蓝色滤光单元41过滤成为蓝光，经由所述绿色滤光单元42过滤成为绿光，经由所述红色转换单元43转换成为红光，从而实现彩色显示。
具体地，所述基板1与封装盖板2的材料可以是玻璃，也可以是柔性材料，其中至少一个要透光，优选的，所述基板1与封装盖板2均为玻璃板。所述密封胶框5能够防止外界的水汽、氧气进入，保护内部元件。
所述空穴传输层23的材料为聚三苯胺(poly-TPD)，所述电子传输层24的材料为八羟基喹啉铝(Alq3)。
所述第一发光层31、及所述第二发光层32均由主体材料掺杂客体材料制成，所述客体材料包括发光材料、及电子传输材料，所述电子传输材料可以起到增大电子传输速率的作用。
优选的，所述主体材料与客体材料的比例为8:1～20:1，所述客体材料中的发光材料与电子传输材料的比例为1:1～10:1。
在所述第一发光层31中，所述主体材料为有机蓝光主体材料，所述客体材料中的发光材料、及电子传输材料分别为蓝色荧光掺杂剂、及电子传输掺杂剂。在所述第二发光层32中，所述主体材料为有机蓝光主体材料或有机绿光主体材料，所述客体材料中的发光材料、及电子传输材料分别为 磷光掺杂剂、及电子传输掺杂剂。
所述磷光掺杂剂可以是红、绿色磷光共掺杂剂或黄色磷光掺杂剂，使得所述第一发光层31发射的蓝色荧光与第二发光层32发射的红绿色磷光、或黄色磷光合成白光。所述磷光掺杂剂也可以是绿色磷光掺杂剂，使得所述第一发光层31发射的蓝色荧光与第二发光层32发射的绿色磷光合成青色光。
所述发光层3也可以如图3所示，除包括所述第一发光层31、及第二发光层32外，还包括一设于所述第一发光层31、及第二发光层32之间的间隔层33。所述间隔层33由主体材料掺杂电子传输材料组成，所述主体材料可以是有机蓝光主体材料或有机绿光主体材料。所述间隔层33的作用是使所述第一发光层31与第二发光层32分开，使得具有蓝色荧光掺杂剂的第一发光层31中的激子与具有磷光掺杂剂的第二发光层32中的激子不会互相影响。
进一步地，所述有机蓝光主体材料可以是4,4',4”-三(咔唑-9-基)三苯胺(TCTA)，其分子式为:
Figure PCTCN2015075673-appb-000001
或2，4，6，-三(9H-咔唑-9-基)-1,3,5-三嗪(TRZ)，其分子式为：
Figure PCTCN2015075673-appb-000002
所述有机绿光主体材料可以是3,3’-(1,3-苯基)双(7-乙氧基-4-甲基香豆素)(mEMCB)其分子式为：
Figure PCTCN2015075673-appb-000003
所述蓝色荧光掺杂剂可以是聚芴类、4,4’-双(2,2-二苯乙烯基)联苯 (DPVBi)、或FIr6。
所述红、绿色磷光共掺杂剂包括红色磷光掺杂剂与绿色磷光掺杂剂。所述红色磷光掺杂剂可以是三(1-苯基-异喹啉)合铱(III)(Ir(piq)3)，其分子式为：
Figure PCTCN2015075673-appb-000004
所述绿色磷光掺杂剂可以是三(2-苯基吡啶)合铱(Ir(ppy)3)，其分子式为：
Figure PCTCN2015075673-appb-000005
所述黄色磷光掺杂剂可以是二(2,3-二苯基吡嗪)-乙酰丙酮合铱(Ir(dphp)2(acac))，其分子式为：
Figure PCTCN2015075673-appb-000006
所述电子传输掺杂剂可以是2-(4'-叔丁基苯)-5-(4”-联苯基)-1,3,4-噁二唑(PBD)，其分子式为：
Figure PCTCN2015075673-appb-000007
所述发光层3可以采用真空热蒸镀或溶液成膜的方式形成。
将发光层3设置为第一发光层31与第二发光层32，将能量带隙大的蓝光发光材料与红绿光发光材料、黄光发光材料、或绿光发光材料分别设于第一、第二发光层31、32中能够实现分层发光，再合成白光或青色光，具 有较高的能量效率，并且分别在第一、第二发光层31、32中掺入了电子传输材料，能够帮助电子传输，同时使发光位置远离发光层3与电子传输层24的界面，避免激子的淬灭，有效提高OLED彩色显示器件的发光效率，降低能耗。
请参阅图4，在该第一实施例中，所述蓝色滤光单元41、绿色滤光单元42、及红色转换单元43对应一像素，所述像素包括红色子像素83、绿色子像素82、及蓝色子像素81。所述红色转换单元43对应像素中的红色子像素83，所述绿色滤光单元42对应像素中的绿色子像素82、所述蓝色滤光单元41对应像素中的蓝色子像素81。所述红色子像素83、绿色子像素82、及蓝色子像素81分别对应一个TFT，以控制每个子像素分别对应的发光层3的区域是否发光。
当TFT控制对应于蓝色子像素81的发光层3的区域发光时，该发光层3发出的白光或青色光经由蓝色滤光单元41过滤成为蓝光；当TFT控制对应于绿色子像素82的发光层3的区域发光时，该发光层3区域发出的白光或青色光经由绿色滤光单元42过滤成为绿光；当TFT控制对应于红色子像素83的发光层3的区域发光时，该发光层3区域发出的白光或青色光经由红色转换单元43转换成为红光，从而实现了红、绿、蓝三基色的显示，并能叠加出各种色彩，实现彩色显示。
请参阅图5，为本发明OLED彩色显示器件第一实施例的像素排布示意图，每相邻上下两行的像素排布方式完全相同，所述红色子像素83、绿色子像素82、与蓝色子像素81沿水平方向从左至右依次间隔设置。
请参阅图6，为本发明OLED彩色显示器件第二实施例的结构示意图。该第二实施例与上述第一实施例的区别在于，所述色彩转换层4还包括一空白透光单元40，所述白光或青色光透过所述空白透光单元40后仍为白光或青色光，可以增大OLED彩色显示器件的亮度。
请参阅图7，在该第二实施例中，所述蓝色滤光单元41、绿色滤光单元42、红色转换单元43、及空白透光单元40对应一像素，所述像素包括红色子像素83、绿色子像素82、蓝色子像素81、及白色或青色子像素80。所述红色转换单元43对应像素中的红色子像素83，所述绿色滤光单元42对应像素中的绿色子像素82、所述蓝色滤光单元41对应像素中的蓝色子像素81，所述空白透光单元40对应像素中的白色或青色子像素80。所述红色子像素83、绿色子像素82、蓝色子像素81、及白色或青色子像素80分别对应一个TFT，以控制每个子像素分别对应的发光层3的区域是否发光。
请参阅图8，为本发明OLED彩色显示器件第二实施例的一种像素排 布示意图，每相邻上下两行的像素排布方式完全相同，所述红色子像素83、绿色子像素82、蓝色子像素81、及白色或青色子像素80沿水平方向从左至右依次间隔设置。
请参阅图9，为该第二实施例的另一种像素排布示意图，所述红色子像素83、绿色子像素82、蓝色子像素81、及白色或青色子像素80沿顺时针方向依次间隔设置。由此说明，本发明的技术效果与像素的各子像素的排布方式无关，可应用于不同像素排布方式的OLED彩色显示器件。
综上所述，本发明的OLED彩色显示器件，其发光层包括第一发光层与第二发光层，将能量带隙大的蓝光发光材料与红绿光发光材料、黄光发光材料、或绿光发光材料分别设于第一、第二发光层中实现分层发光，再合成白光或青色光，具有较高的能量效率，并且分别在第一、第二发光层中掺入电子传输材料，帮助电子传输，同时使发光位置远离发光层与电子传输层的界面，避免激子的淬灭，有效提高了OLED彩色显示器件的发光效率，降低能耗。
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后附的权利要求的保护范围。

Claims (14)

  1. 一种OLED彩色显示器件，包括基板、形成于所述基板上的阳极、形成于所述阳极上的薄膜晶体管阵列、形成于所述薄膜晶体管阵列上的空穴注入层、形成于所述空穴注入层上的空穴传输层、形成于所述空穴传输层上的发光层、形成于所述发光层上的电子传输层、形成于所述电子传输层上的阴极、设于所述阴极上方并与所述基板相贴合的封装盖板、形成于所述封装盖板内侧的色彩转换层、及粘结所述基板与封装盖板的密封胶框；
    所述发光层包括第一发光层、及第二发光层，所述第一发光层、及第二发光层均由主体材料掺杂客体材料制成，所述客体材料包括发光材料、与电子传输材料；所述第一发光层为蓝光发光层，所述第二发光层为红绿光共同发光层、黄光发光层、或绿光发光层；所述第一发光层与所述第二发光层发射的光共同合成白光或青色光；
    所述色彩转换层包括间隔设置的蓝色滤光单元、绿色滤光单元、及红色转换单元；所述白光或青色光经由所述蓝色滤光单元过滤成为蓝光，经由所述绿色滤光单元过滤成为绿光，经由所述红色转换单元转换成为红光，从而实现彩色显示。
  2. 如权利要求1所述的OLED彩色显示器件，其中，所述主体材料与客体材料的比例为8:1～20:1，所述客体材料中的发光材料与电子传输材料的比例为1:1～10:1。
  3. 如权利要求1所述的OLED彩色显示器件，所述色彩转换层还包括一空白透光单元，所述白光或青色光透过所述空白透光单元后仍为白光或青色光。
  4. 如权利要求2所述的OLED彩色显示器件，其中，在所述第一发光层中，所述主体材料为有机蓝光主体材料，所述客体材料中的发光材料、及电子传输材料分别为蓝色荧光掺杂剂、及电子传输掺杂剂；在所述第二发光层中，所述主体材料为有机蓝光主体材料或有机绿光主体材料，所述客体材料中的发光材料、及电子传输材料分别为磷光掺杂剂、及电子传输掺杂剂。
  5. 如权利要求4所述的OLED彩色显示器件，其中，所述磷光掺杂剂为红、绿色磷光共掺杂剂或黄色磷光掺杂剂，使得所述第一发光层发射的蓝色荧光与第二发光层发射的红绿色磷光、或黄色磷光合成白光；或所述磷光掺杂剂为绿色磷光掺杂剂，使得所述第一发光层发射的蓝色荧光与第 二发光层发射的绿色磷光合成青色光。
  6. 如权利要求1所述的OLED彩色显示器件，所述发光层还包括一设于所述第一发光层与第二发光层之间的间隔层，所述间隔层由主体材料掺杂电子传输材料组成，所述主体材料为有机蓝光主体材料或有机绿光主体材料。
  7. 如权利要求1所述的OLED彩色显示器件，其中，所述基板与封装盖板的材料为玻璃或柔性材料，所述基板与封装盖板中至少有一个透光。
  8. 如权利要求5所述的OLED彩色显示器件，其中，所述有机蓝光主体材料为4,4',4”-三(咔唑-9-基)三苯胺、或2，4，6，-三(9H-咔唑-9-基)-1,3,5-三嗪；所述有机绿光主体材料为3,3’-(1,3-苯基)双(7-乙氧基-4-甲基香豆素)；所述蓝色荧光掺杂剂为聚芴类、4,4’-双(2,2-二苯乙烯基)联苯、或FIr6；所述红、绿色磷光共掺杂剂包括红色磷光掺杂剂与绿色磷光掺杂剂；所述红色磷光掺杂剂为三(1-苯基-异喹啉)合铱(III)；所述绿色磷光掺杂剂为三(2-苯基吡啶)合铱；所述黄色磷光掺杂剂为二(2,3-二苯基吡嗪)-乙酰丙酮合铱；所述电子传输掺杂剂为2-(4'-叔丁基苯)-5-(4”-联苯基)-1,3,4-噁二唑。
  9. 如权利要求1所述的OLED彩色显示器件，其中，所述发光层采用真空热蒸镀或溶液成膜的方式形成。
  10. 如权利要求1所述的OLED彩色显示器件，其中，所述电子传输层的材料为八羟基喹啉铝，所述空穴传输层的材料为聚三苯胺。
  11. 一种OLED彩色显示器件，包括基板、形成于所述基板上的阳极、形成于所述阳极上的薄膜晶体管阵列、形成于所述薄膜晶体管阵列上的空穴注入层、形成于所述空穴注入层上的空穴传输层、形成于所述空穴传输层上的发光层、形成于所述发光层上的电子传输层、形成于所述电子传输层上的阴极、设于所述阴极上方并与所述基板相贴合的封装盖板、形成于所述封装盖板内侧的色彩转换层、及粘结所述基板与封装盖板的密封胶框；
    所述发光层包括第一发光层、及第二发光层，所述第一发光层、及第二发光层均由主体材料掺杂客体材料制成，所述客体材料包括发光材料、与电子传输材料；所述第一发光层为蓝光发光层，所述第二发光层为红绿光共同发光层、黄光发光层、或绿光发光层；所述第一发光层与所述第二发光层发射的光共同合成白光或青色光；
    所述色彩转换层包括间隔设置的蓝色滤光单元、绿色滤光单元、及红色转换单元；所述白光或青色光经由所述蓝色滤光单元过滤成为蓝光，经由所述绿色滤光单元过滤成为绿光，经由所述红色转换单元转换成为红光， 从而实现彩色显示；
    其中，所述主体材料与客体材料的比例为8:1～20:1，所述客体材料中的发光材料与电子传输材料的比例为1:1～10:1；
    所述色彩转换层还包括一空白透光单元，所述白光或青色光透过所述空白透光单元后仍为白光或青色光；
    所述发光层还包括一设于所述第一发光层与第二发光层之间的间隔层，所述间隔层由主体材料掺杂电子传输材料组成，所述主体材料为有机蓝光主体材料或有机绿光主体材料；
    其中，所述基板与封装盖板的材料为玻璃或柔性材料，所述基板与封装盖板中至少有一个透光；
    其中，所述发光层采用真空热蒸镀或溶液成膜的方式形成；
    其中，所述电子传输层的材料为八羟基喹啉铝，所述空穴传输层的材料为聚三苯胺。
  12. 如权利要求11所述的OLED彩色显示器件，其中，在所述第一发光层中，所述主体材料为有机蓝光主体材料，所述客体材料中的发光材料、及电子传输材料分别为蓝色荧光掺杂剂、及电子传输掺杂剂；在所述第二发光层中，所述主体材料为有机蓝光主体材料或有机绿光主体材料，所述客体材料中的发光材料、及电子传输材料分别为磷光掺杂剂、及电子传输掺杂剂。
  13. 如权利要求12所述的OLED彩色显示器件，其中，所述磷光掺杂剂为红、绿色磷光共掺杂剂或黄色磷光掺杂剂，使得所述第一发光层发射的蓝色荧光与第二发光层发射的红绿色磷光、或黄色磷光合成白光；或所述磷光掺杂剂为绿色磷光掺杂剂，使得所述第一发光层发射的蓝色荧光与第二发光层发射的绿色磷光合成青色光。
  14. 如权利要求13所述的OLED彩色显示器件，其中，所述有机蓝光主体材料为4,4',4”-三(咔唑-9-基)三苯胺、或2，4，6，-三(9H-咔唑-9-基)-1,3,5-三嗪；所述有机绿光主体材料为3,3’-(1,3-苯基)双(7-乙氧基-4-甲基香豆素)；所述蓝色荧光掺杂剂为聚芴类、4,4’-双(2,2-二苯乙烯基)联苯、或FIr6；所述红、绿色磷光共掺杂剂包括红色磷光掺杂剂与绿色磷光掺杂剂；所述红色磷光掺杂剂为三(1-苯基-异喹啉)合铱(III)；所述绿色磷光掺杂剂为三(2-苯基吡啶)合铱；所述黄色磷光掺杂剂为二(2,3-二苯基吡嗪)-乙酰丙酮合铱；所述电子传输掺杂剂为2-(4'-叔丁基苯)-5-(4”-联苯基)-1,3,4-噁二唑。
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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104993037B (zh) * 2015-05-27 2018-01-30 合肥鑫晟光电科技有限公司 一种发光二极管及其封装结构、封装方法和显示装置
CN105261709A (zh) * 2015-10-08 2016-01-20 华南理工大学 一种掺杂量子点的有机发光器件及其制备方法
CN106783922A (zh) * 2016-12-26 2017-05-31 武汉华星光电技术有限公司 Oled显示器
KR102227716B1 (ko) 2017-03-28 2021-03-16 삼성디스플레이 주식회사 유기 발광 소자 및 이를 포함하는 유기 발광 표시 장치
CN107359261A (zh) * 2017-06-22 2017-11-17 深圳市华星光电技术有限公司 柔性显示装置及其白光有机电致发光器件
US10424756B2 (en) 2017-06-22 2019-09-24 Shenzhen China Star Optoelectronics Technology Co., Ltd Flexible display apparatus and its white light organic electroluminescent device
CN111244292A (zh) * 2018-11-28 2020-06-05 陕西坤同半导体科技有限公司 显示面板以及显示装置
CN110265587A (zh) * 2019-07-09 2019-09-20 昆山梦显电子科技有限公司 显示面板及其制造方法
CN110335893B (zh) * 2019-07-22 2022-11-11 京东方科技集团股份有限公司 显示面板、封装盖板及其制造方法
CN110729336A (zh) * 2019-10-28 2020-01-24 昆山国显光电有限公司 一种显示面板及显示装置
CN111430561B (zh) * 2020-04-13 2022-09-30 昆山国显光电有限公司 白光发光器件、显示基板和显示面板
CN112736206A (zh) * 2020-12-25 2021-04-30 安徽熙泰智能科技有限公司 一种白光oled器件结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101593815A (zh) * 2009-06-26 2009-12-02 天津理工大学 基于有机与无机复合色彩转换膜的白色有机电致发光器件
CN103943653A (zh) * 2013-01-18 2014-07-23 环球展览公司 用于oled装置的全色像素布置、制作所述布置的方法以及包括所述布置的oled装置
CN104112766A (zh) * 2014-07-22 2014-10-22 深圳市华星光电技术有限公司 彩色显示器件结构

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1578172B1 (en) * 2002-12-26 2014-09-17 Semiconductor Energy Laboratory Co., Ltd. Organic light emitting element
US6967062B2 (en) * 2003-03-19 2005-11-22 Eastman Kodak Company White light-emitting OLED device having a blue light-emitting layer doped with an electron-transporting or a hole-transporting material or both
TWI282699B (en) * 2005-03-14 2007-06-11 Au Optronics Corp Method of fabrication organic light emitting diode display
US9112170B2 (en) * 2006-03-21 2015-08-18 Semiconductor Energy Laboratory Co., Ltd. Light-emitting element, light-emitting device, and electronic device
JP2011501440A (ja) * 2007-10-16 2011-01-06 エイチシーエフ パートナーズ リミテッド パートナーシップ 電気リン光性の被覆発光量子ドットを具備する有機発光ダイオード
KR101351410B1 (ko) * 2009-09-29 2014-01-14 엘지디스플레이 주식회사 백색 유기 발광 소자
JP5703080B2 (ja) * 2011-03-23 2015-04-15 株式会社東芝 有機電界発光素子、表示装置および照明装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101593815A (zh) * 2009-06-26 2009-12-02 天津理工大学 基于有机与无机复合色彩转换膜的白色有机电致发光器件
CN103943653A (zh) * 2013-01-18 2014-07-23 环球展览公司 用于oled装置的全色像素布置、制作所述布置的方法以及包括所述布置的oled装置
CN104112766A (zh) * 2014-07-22 2014-10-22 深圳市华星光电技术有限公司 彩色显示器件结构

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