WO2016058224A1 - Oled器件的制备方法及其制得的oled器件 - Google Patents

Oled器件的制备方法及其制得的oled器件 Download PDF

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WO2016058224A1
WO2016058224A1 PCT/CN2014/089957 CN2014089957W WO2016058224A1 WO 2016058224 A1 WO2016058224 A1 WO 2016058224A1 CN 2014089957 W CN2014089957 W CN 2014089957W WO 2016058224 A1 WO2016058224 A1 WO 2016058224A1
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pixel
sub
solvent
prepared
light
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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 US14/424,009 priority Critical patent/US9660210B2/en
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    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
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    • H10K85/324—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising aluminium, e.g. Alq3
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    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
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Definitions

  • the present invention relates to the field of display technologies, and in particular, to a method for fabricating an OLED device and an OLED device produced thereby.
  • OLED Organic Light Emitting Diode
  • LCD liquid crystal display
  • NCs Semiconductor nanocrystals
  • QDs quantum dots
  • Quantum Dots Light Emitting Diodes have important commercial applications and have attracted strong research interest in the last decade. In fact, QD-LEDs have many advantages over Organic Light Emitting Diodes (OLEDs): (1) The linewidth of quantum dot luminescence is between 20-30 nm, compared to the luminescence of organic luminescence greater than 50 nm, FWHM To be narrow, this plays a key role in the color purity of the real picture. (2) Inorganic materials exhibit better thermal stability relative to organic materials. When the device is at high brightness or high current density, Joule heat is the main cause of device degradation. Due to the excellent thermal stability, inorganic material based devices will exhibit a long service life.
  • An object of the present invention is to provide a method for preparing an OLED device and an OLED device prepared by the same, wherein various sub-pixels in the light-emitting layer are prepared by a solution film forming method, wherein at least one sub-pixel is prepared by using quantum dots, at least A sub-pixel is prepared by using an organic light-emitting material, and the fine mask is not required in the manufacturing process of the OLED device, so the manufacturing cost is low, the material utilization rate is high, and the yield rate is high.
  • the present invention provides a method of fabricating an OLED device, comprising:
  • Step 1 providing a substrate, and sequentially forming an anode and a hole transport layer on the substrate;
  • Step 2 forming a light-emitting layer on the hole transport layer by a solution film formation method, the light-emitting layer comprising a red sub-pixel, a green sub-pixel, a blue sub-pixel and a white sub-pixel, wherein at least one of the sub-pixels is prepared by using quantum dots At least one sub-pixel is prepared using an organic luminescent material;
  • Step 3 sequentially forming an electron transport layer and a cathode on the light-emitting layer
  • Step 4 providing a package cover plate disposed above the cathode, bonding the substrate and the package cover plate (2) through the sealant frame, thereby completing the packaging of the OLED device.
  • the anode, the hole transport layer, the electron transport layer, and the cathode are respectively prepared by vacuum thermal evaporation; the electron transport layer is formed of octahydroxyquinoline aluminum, and the hole transport layer is composed of polytriphenylamine or polyethylene Dioxythiophene is formed.
  • the substrate is a TFT substrate, and the substrate and the package cover are formed of glass or a flexible material, and at least one of the substrate and the package cover is transparent.
  • the at least one sub-pixel is prepared by using quantum dots. If the red sub-pixel is prepared by using quantum dots, the red sub-pixel is mixed with the red light quantum dot and the solvent by the organic host material, coated and evaporated. After the solvent is obtained; if the green sub-pixel is prepared by quantum dots, the green sub-pixel is obtained by mixing the organic host material with the green light quantum dot and the solvent, coating and volatilizing to remove the solvent; if the blue sub-pixel is a quantum dot In preparation, the blue sub-pixel is obtained by mixing an organic host material with a blue quantum dot and a solvent, coating and volatilizing to remove the solvent; if the white sub-pixel is prepared by using quantum dots, the white sub-pixel passes through the organic host material.
  • the blue light quantum dots are ZnCdS, CdSe/ZnS or nano SiN 4
  • the green light quantum dots are CdSe/ZnS or Zn.
  • the red light quantum dot is CdSe/CdS/ZnS
  • the white light quantum dot is CdSe, CdS, CdTe, CdMnS, ZnSe or ZnMnSe
  • the organic 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 solvent is methanol, ethanol, chlorobenzene or Chloroform.
  • the at least one sub-pixel is prepared by using quantum dots. If the red sub-pixel is prepared by using quantum dots, the red sub-pixel is mixed with a surface coating agent and a solvent by a red light quantum dot, coated and volatilized.
  • the green sub-pixel is obtained by mixing green light quantum dots with a surface coating agent and a solvent, coating and volatilizing to remove the solvent; if it is a blue sub-pixel, For quantum dot preparation, the blue sub-pixel is obtained by mixing a blue quantum dot with a surface coating agent and a solvent, coating and volatilizing to remove the solvent; if the white sub-pixel is prepared by using quantum dots, the white sub-pixel passes The white light quantum dot is mixed with the surface coating agent and the solvent, and is obtained by coating and volatilizing to remove the solvent, or by mixing the red light quantum dot, the green light quantum dot and the blue light quantum dot with the surface coating agent and the solvent, coating and volatilizing to remove After the solvent is obtained; the surface coating agent is stearic acid, tri-zinc-phosphine oxide or polymethyl methacrylate; the solvent is methanol, B Alcohol, water, chlorobenzen
  • the at least one sub-pixel is prepared by using quantum dots to prepare the blue sub-pixels using quantum dots.
  • the at least one sub-pixel is prepared by using an organic luminescent material, and if the red sub-pixel is prepared by using an organic luminescent material, the red sub-pixel is mixed with the red luminescent material and the solvent by the organic host material, and coated.
  • the green sub-pixel is prepared by using an organic luminescent material
  • the green sub-pixel is mixed with the green luminescent material and the solvent by the organic host material, coated and volatilized to remove the solvent
  • it is blue
  • the sub-pixel is prepared by using an organic light-emitting material
  • the blue sub-pixel is obtained by mixing an organic host material with a blue light-emitting material and a solvent, coating and volatilizing to remove the solvent
  • the white sub-pixel is prepared by using an organic light-emitting material
  • the white sub-pixel is obtained by mixing an organic host material with a red light-emitting material, a green light-emitting material, a blue light-emitting material and a solvent, coating and volatilizing to remove the solvent;
  • the blue light-emitting material is 9,10-di ( ⁇ -naphthyl) ⁇
  • the green light-emitting material is tris(2-phenylpyridine) ruthenium
  • At least one sub-pixel is prepared by using an organic light-emitting material as the red sub-pixel
  • the green sub-pixel and the white sub-pixel are prepared by using an organic light-emitting material.
  • the present invention also provides an OLED device prepared by the preparation method according to claim 1, comprising a substrate, an anode formed on the substrate, a hole transport layer formed on the anode, and a light emission formed on the hole transport layer a layer, an electron transport layer formed on the light emitting layer, a cathode formed on the electron transport layer, a package cover plate disposed above the cathode, and a substrate and a package cover plate disposed between the substrate and the package cover plate a sealing frame, the luminescent layer comprising a red sub-pixel, a green sub-pixel, a blue sub-pixel and a white sub-pixel, wherein the various sub-pixels in the luminescent layer are prepared by a solution film forming method, wherein at least one sub-pixel Using quantum dot preparation, at least one of the sub-pixels is prepared using an organic luminescent material.
  • the blue sub-pixel is prepared using quantum dots, and the red sub-pixel, the green sub-pixel and the white sub-pixel are prepared using an organic luminescent material.
  • the present invention provides a method for preparing an OLED device, wherein various sub-pixels in the light-emitting layer are prepared by a solution film forming method, the anode, the hole transport layer, the electron transport layer, and the cathode.
  • the method is prepared by vacuum thermal evaporation, so that the fine mask is not required in the preparation method of the OLED device, so that the preparation method has low fabrication cost, high material utilization rate, high yield rate, and is provided by setting the light-emitting layer.
  • At least one of the sub-pixels is prepared by using quantum dots, and at least one of the sub-pixels is prepared by using an organic luminescent material, so that the preparation method of the present invention is cheaper to manufacture than the method for preparing all sub-pixels using quantum dots, and organic is used for all sub-pixels.
  • the performance of the obtained OLED device is better; the OLED device prepared by the invention combines the advantages of the quantum dot OLED and the solution film-forming OLED, thereby having excellent performance and can be applied to a flat display, TV and other display areas.
  • FIG. 1 is a schematic flow chart of a method of fabricating an OLED device of the present invention
  • FIG. 2 is a schematic structural view of an OLED device of the present invention
  • FIG. 3 is a schematic plan view showing a pixel arrangement structure of an OLED device of the present invention.
  • FIG. 4 is a schematic view showing the pixel arrangement structure shown in FIG. 3 for displaying a panel
  • FIG. 5 is a schematic structural view of a TFT driving circuit of the pixel arrangement structure shown in FIG. 3;
  • FIG. 6 is a schematic plan view showing another pixel arrangement structure of an OLED device of the present invention.
  • FIG. 7 is a schematic view showing the pixel arrangement structure shown in FIG. 6 for displaying a panel.
  • the present invention provides a method for preparing an OLED device, including:
  • Step 1 providing a substrate 1, and sequentially forming an anode 21 and a hole transport layer 22 on the substrate 1;
  • Step 2 forming a light-emitting layer 23 on the hole transport layer 22 by a solution film formation method, the light-emitting layer 23 including a red sub-pixel 231, a green sub-pixel 232, a blue sub-pixel 233, and a white sub-pixel 234, wherein at least One sub-pixel is prepared using quantum dots, and at least one sub-pixel is prepared using an organic luminescent material.
  • Step 3 sequentially forming an electron transport layer 24 and a cathode 25 on the light-emitting layer 23;
  • Step 4 providing a package cover 2 disposed above the cathode 25, bonding the substrate 1 and the package cover 2 through the sealant frame 3, thereby completing the packaging of the OLED device.
  • the at least one sub-pixel is prepared by using quantum dots. If the red sub-pixel 231 is prepared by using quantum dots, the red sub-pixel 231 can be mixed with the red light quantum dot and the solvent by the organic host material. And if the green sub-pixel 232 is prepared by quantum dots, the green sub-pixel 232 can be obtained by mixing the organic host material with the green light quantum dot and the solvent, coating and volatilizing to remove the solvent; if it is blue The color sub-pixel 233 is prepared by using a quantum dot, and the blue sub-pixel 233 can be obtained by mixing an organic host material with a blue quantum dot and a solvent, coating and volatilizing to remove the solvent; if the white sub-pixel 234 is prepared by using a quantum dot, The white sub-pixel 234 can be obtained by mixing an organic host material with a white light quantum dot and a solvent, coating and volatilizing to remove the solvent, or by combining the organic host material with the red light quantum dot, the green light quantum do
  • the organic host material is TCTA (4,4',4"-tris(carbazol-9-yl)triphenylamine) or TRZ (2,4,6-tris(9H-carbazole-9-yl)) -1,3,5-triazine);
  • the solvent is methanol, ethanol, chlorobenzene or chloroform or the like.
  • the at least one sub-pixel is prepared by using quantum dots. If the red sub-pixel 231 is prepared by using quantum dots, the red sub-pixel 231 may also be mixed with a surface coating agent and a solvent by using red light quantum dots. After the solvent is coated and volatilized to remove the solvent; if the green sub-pixel 232 is prepared by using quantum dots, the green sub-pixel 232 can also be mixed with the surface coating agent and the solvent by the green light quantum dot, coated and evaporated to remove the solvent.
  • the blue sub-pixel 233 can also be obtained by mixing the blue quantum dots with the surface coating agent and the solvent, coating and volatilizing to remove the solvent; if it is a white sub-pixel 234 is prepared by quantum dots, and the white sub-pixel 234 can also be obtained by mixing white light quantum dots with a surface coating agent and a solvent, coating and volatilizing to remove the solvent, or passing red light quantum dots, green light quantum dots and blue light quantum dots. The combination is mixed with a surface coating agent and a solvent, and is obtained by coating and volatilizing to remove the solvent;
  • the blue light quantum dot is ZnCdS, CdSe/ZnS or nano SiN 4 or the like
  • the green light quantum dot is CdSe/ZnS or ZnSe: Cu 2+ , etc.
  • the red light quantum dot is CdSe/CdS/ZnS, etc.
  • the white light quantum dots are II to VI quantum dots such as CdSe, CdS, CdTe, CdMnS, ZnSe or ZnMnSe;
  • the surface coating agent is stearic acid, tri-zinc-phosphine oxide or polymethyl methacrylate;
  • the solvent is methanol, ethanol, water, chlorobenzene or chloroform or the like.
  • the at least one sub-pixel is prepared by using quantum dots
  • the blue sub-pixel 233 is prepared by using quantum dots.
  • the organic host material and the surface coating agent have a common function of preventing quantum dot agglomeration and oxidation. Because quantum dots are nanoparticles, zero-dimensional materials, which have large surface activity, are prone to agglomeration, leading to oxidation and quenching of fluorescence.
  • the at least one sub-pixel is prepared by using an organic luminescent material. If the red sub-pixel 231 is prepared by using an organic luminescent material, the red sub-pixel 231 is mixed with the red luminescent material and the solvent through the organic host material.
  • the green sub-pixel 232 is prepared by using an organic light-emitting material
  • the green sub-pixel 232 is obtained by mixing the organic host material with the green light-emitting material and the solvent, coating and volatilizing to remove the solvent
  • the blue sub-pixel 233 is prepared by using an organic luminescent material
  • the blue sub-pixel 233 is obtained by mixing the organic host material with the blue luminescent material and the solvent, coating and volatilizing to remove the solvent
  • the white sub-pixel 234 is organic The luminescent material is prepared, and the white sub-pixel 234 is obtained by mixing the organic host material with the red luminescent material, the green luminescent material, the blue luminescent material and the solvent, coating and volatilizing to remove the solvent;
  • the organic host material is TCTA (4,4',4"-tris(carbazol-9-yl)triphenylamine) or TRZ (2,4,6-tris(9H-carbazole-9-yl)) -1,3,5-triazine), the solvent is methanol, ethanol, water, chlorobenzene or chloroform;
  • the blue light emitting material may be 9,10-bis( ⁇ -naphthyl)anthracene (ADN), and its structural formula is
  • the green light-emitting material may be tris(2-phenylpyridine) ruthenium (Ir(ppy) 3 ), and its structural formula is
  • the red light emitting material may be 4-(dimercaptomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM), and the structural formula is
  • the at least one sub-pixel is prepared by using an organic luminescent material
  • the red sub-pixel 231, the green sub-pixel 232 and the white sub-pixel 234 are prepared by using an organic luminescent material.
  • the substrate 1 is a TFT substrate, and the substrate 1 and the package cover 2 are formed of glass or a flexible material, and at least one of the substrate 1 and the package cover 2 is transparent.
  • the substrate 1 and the package cover 2 are both glass plates.
  • the substrate 1 and the package cover 2 are bonded together through the sealant frame 3, so that external water vapor and oxygen can be prevented from entering, thereby sealing and protecting the internal electronic components.
  • the anode 21, the hole transport layer 22, the electron transport layer 24, and the cathode 25 are respectively true Prepared by hot air evaporation, no need for a fine mask (FMM).
  • the electron transport layer 24 is formed of a material such as octahydroxyquinoline aluminum (Alq3) or the like
  • the hole transport layer 22 is made of a material such as polytriphenylamine (poly-TPD) or polyethylene dioxythiophene (PEDOT). form.
  • the present invention further provides an OLED device comprising a substrate 1, an anode 21 formed on the substrate 1, a hole transport layer 22 formed on the anode 21, and a hole transport layer formed on the hole transport layer. a light-emitting layer 23 on 22, an electron transport layer 24 formed on the light-emitting layer 23, a cathode 25 formed on the electron transport layer 24, a package cover 2 disposed above the cathode 25, and a substrate cover 1 and a package cover The sealant frame 3 of the substrate 1 and the package cover 2 is bonded between 2.
  • the illuminating layer 23 includes a red sub-pixel 231, a green sub-pixel 232, a blue sub-pixel 233, and a white sub-pixel 234, wherein all sub-pixels are prepared by a solution film forming method, and at least one sub-pixel is prepared by using quantum dots, at least A sub-pixel is prepared using an organic light-emitting material.
  • the blue sub-pixel 233 is prepared using quantum dots.
  • the blue sub-pixel 233 is prepared by using quantum dots
  • the red sub-pixel 231, the green sub-pixel 232 and the white sub-pixel 234 are prepared by using an organic luminescent material.
  • the at least one sub-pixel is prepared by using quantum dots. If the red sub-pixel 231 is prepared by using quantum dots, the red sub-pixel 231 can also be mixed with a surface coating agent and a solvent by a red light quantum dot to coat and volatilize the solvent.
  • the green sub-pixel 232 can also be obtained by mixing green light quantum dots with a surface coating agent and a solvent, coating and volatilizing to remove the solvent; if it is a blue sub-pixel
  • the pixel 233 is prepared by using a quantum dot, and the blue sub-pixel 233 can also be obtained by mixing a blue quantum dot with a surface coating agent and a solvent, coating and volatilizing to remove the solvent;
  • the white sub-pixel 234 is prepared by using a quantum dot,
  • the white sub-pixel 234 can also be obtained by mixing a white light quantum dot with a surface coating agent and a solvent, coating and volatilizing to remove the solvent, or by surface combination of a red light quantum dot, a green light quantum dot, and a blue quantum dot. Mixing agent and solvent, coating and volatilizing to remove solvent;
  • the organic host material is TCTA (4,4',4"-tris(carbazol-9-yl)triphenylamine) or TRZ (2,4,6-tris(9H-carbazole-9-yl)) -1,3,5-triazine);
  • the solvent is methanol, ethanol, chlorobenzene or chloroform or the like.
  • the at least one sub-pixel is prepared by using quantum dots. If the red sub-pixel 231 is prepared by using quantum dots, the red sub-pixel 231 can also be mixed with a surface coating agent and a solvent by a red light quantum dot to coat and volatilize the solvent.
  • the green sub-pixel 232 can also be obtained by mixing green light quantum dots with a surface coating agent and a solvent, coating and volatilizing to remove the solvent; if it is a blue sub-pixel
  • the pixel 233 is prepared by using a quantum dot, and the blue sub-pixel 233 can also be obtained by mixing a blue quantum dot with a surface coating agent and a solvent, coating and volatilizing to remove the solvent;
  • the white sub-pixel 234 is prepared by using a quantum dot,
  • the white sub-pixel 234 can also be obtained by mixing a white light quantum dot with a surface coating agent and a solvent, coating and volatilizing to remove the solvent, or by surface combination of a red light quantum dot, a green light quantum dot, and a blue quantum dot. Mixing agent and solvent, coating and volatilizing to remove solvent;
  • the blue light quantum dot is ZnCdS, CdSe/ZnS or nano SiN 4 or the like
  • the green light quantum dot is CdSe/ZnS or ZnSe: Cu 2+ , etc.
  • the red light quantum dot is CdSe/CdS/ZnS, etc.
  • the white light quantum dots are II to VI quantum dots such as CdSe, CdS, CdTe, CdMnS, ZnSe or ZnMnSe;
  • the surface coating agent is stearic acid, tri-zinc-phosphine oxide or polymethyl methacrylate;
  • the solvent is methanol, ethanol, water, chlorobenzene or chloroform or the like.
  • the organic host material and the surface coating agent have a common function of preventing quantum dot agglomeration and oxidation. Because quantum dots are nanoparticles, zero-dimensional materials, which have large surface activity, are prone to agglomeration, leading to oxidation and quenching of fluorescence.
  • the at least one sub-pixel is prepared by using an organic luminescent material. If the red sub-pixel 231 is prepared by using an organic luminescent material, the red sub-pixel 231 is mixed with a red luminescent material and a solvent by an organic host material to coat and volatilize the solvent.
  • the green sub-pixel 232 is prepared by using an organic light-emitting material
  • the green sub-pixel 232 is mixed with the green light-emitting material and the solvent by an organic host material, coated and evaporated to remove the solvent
  • it is a blue sub-pixel 233 is prepared by using an organic luminescent material, wherein the blue sub-pixel 233 is obtained by mixing an organic host material with a blue luminescent material and a solvent, coating and volatilizing to remove the solvent
  • the white sub-pixel 234 is prepared by using an organic luminescent material, The white sub-pixel 234 passes through the organic host material and the red light
  • the luminescent material, the green luminescent material, the blue luminescent material and the solvent are mixed, coated and volatilized to remove the solvent;
  • the organic host material is TCTA (4,4',4"-tris(carbazol-9-yl)triphenylamine) or TRZ (2,4,6-tris(9H-carbazole-9-yl)) -1,3,5-triazine), the solvent is methanol, ethanol, water, chlorobenzene or chloroform;
  • the blue light emitting material may be 9,10-bis( ⁇ -naphthyl)anthracene (ADN), and its structural formula is
  • the green light-emitting material may be tris(2-phenylpyridine) ruthenium (Ir(ppy) 3 ), and its structural formula is
  • the red light emitting material may be 4-(dimercaptomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM), and the structural formula is
  • the substrate 1 is a TFT substrate
  • the substrate 1 and the package cover 2 are formed of glass or a flexible material, and at least one of the substrate 1 and the package cover 2 is transparent.
  • the substrate 1 and the package cover 2 are both glass plates.
  • the substrate 1 and the package cover 2 are bonded together through the sealant frame 3, so that external water vapor and oxygen can be prevented from entering, thereby sealing and protecting the internal electronic components.
  • the anode 21, the hole transport layer 22, the electron transport layer 24, and the cathode 25 are each prepared by vacuum thermal evaporation, and a fine mask (FMM) is not required.
  • the electron transport layer 24 is formed of a material such as octahydroxyquinoline aluminum (Alq3) or the like
  • the hole transport layer 22 is made of a material such as polytriphenylamine (poly-TPD) or polyethylene dioxythiophene (PEDOT). form.
  • FIG. 3 is a schematic plan view of a pixel arrangement structure of the OLED device of the present invention.
  • FIG. 4 is a schematic diagram of the pixel arrangement structure shown in FIG. 3 for displaying a panel.
  • the red sub-pixel 231, the green sub-pixel 232, the blue sub-pixel 233, and the white sub-pixel 234 is driven by a TFT (Thin Film Transistor) 4, respectively.
  • TFT Thin Film Transistor
  • FIG. 6 is a schematic plan view of another pixel arrangement structure of the OLED device of the present invention.
  • FIG. 7 is a schematic diagram of the pixel arrangement structure shown in FIG. 6 for displaying a panel.
  • the present invention provides a method for preparing an OLED device, wherein various sub-pixels in the light-emitting layer are prepared by a solution film forming method, and the anode, the hole transport layer, the electron transport layer, and the cathode are used.
  • the method is prepared by vacuum thermal evaporation, so that the fine mask is not required in the preparation method of the OLED device, so that the preparation method has low fabrication cost, high material utilization rate, high yield rate, and by setting the light-emitting layer
  • At least one sub-pixel is prepared by using quantum dots, and at least one of the sub-pixels is prepared by using an organic light-emitting material, so that the preparation method of the invention is cheaper to manufacture than the method for preparing all sub-pixels using quantum dots, and organic light is used for all sub-pixels.
  • the performance of the obtained OLED device is better; the OLED device prepared by the invention combines the advantages of the quantum dot OLED and the solution film-forming OLED, thereby having excellent performance and can be applied to a flat display and a television. Machines and other display areas.

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Abstract

提供一种OLED器件的制备方法及其制得的OLED器件，OLED器件的制备方法为：步骤1、提供一基板（1），并在基板（1）上依次形成阳极（21）与空穴传输层（22）；步骤2、在空穴传输层（22）上通过溶液成膜法制作发光层（23），发光层（23）包括红色子像素（231）、绿色子像素（232）、蓝色子像素（233）与白色子像素（234），其中，至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备；步骤3、在发光层（23）上依次形成电子传输层（24）与阴极（25）；步骤4、提供一封装盖板（2），其设置于阴极（25）上方，将基板（1）与封装盖板（2）通过密封胶框（3）粘结起来，从而完成该OLED器件的封装。由于发光层（23）中的各种子像素均通过溶液成膜法制备，使得该OLED器件的制作过程中不需要使用精细掩膜板，因此制作成本低，材料利用率高，良品率高。

Description

OLED器件的制备方法及其制得的OLED器件 技术领域
本发明涉及显示技术领域，尤其涉及一种OLED器件的制备方法及其制得的OLED器件。
背景技术
有机发光二极管显示器(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。
半导体纳米晶(semiconductor nanocrystals,缩写NCs)，是指尺寸为1-100nm的半导体纳米晶粒。由于半导体纳米晶的尺寸小于其他材料的激子波尔半径，表现出强的量子限域效应，呈现出新的材料性质，因此也称为量子点(quantum dots，缩写QDs)。
由于外部能量的激发(光致发光，电致发光，阴极射线发光等)，电子从基态跃迁到激发态。处于激发态的电子和空穴可能会形成激子。电子与空穴发生复合，最终弛豫到基态。多余的能量通过复合和弛豫过程释放，可能辐射复合发出光子。
量子点发光二极管(Quantum Dots Light Emitting Diodes，QD-LEDs)具有重要的商业应用的价值，在最近十年引起人们强烈的研究兴趣。事实上，QD-LEDs相对于有机发光二极管(Organic Light Emitting Diodes，OLEDs)有很多的优势：(1)量子点发光的线宽在20-30nm之间，相对于有机发光大于50nm的发光，FWHM要窄，这对于现实画面的色纯度起关键的作用。(2)无机材料相对于有机材料表现出更好的热稳定性。当器件处于高亮度或高电流密度下，焦耳热是使器件退化的主要原因。由于优异的热稳定性，基于无机材料的器件将表现出长的使用寿命。(3)由于红绿蓝三基色有机材料的寿命不同，OLEDs显示器的颜色将随时间变化。然而，用同一种材料合成不同尺寸的量子点，由于量子限域效应，可以实现三基色的发光。同一种材料可以表现出相似的退化寿命。(4)QD-LEDs可以实现红外光的发射，而有机材料的发光波长一般小于1微米。(5)对于 量子点没有自旋统计的限制，其外量子效率(external quantum efficiency，EQE)有可能达到100％。
然而在OLED器件热蒸镀制程时需要使用精细掩膜板(Fine metal mask，简称FMM)，不仅制程成本高，而且材料利用率低，良品率低。因此有必要研发一种新的制程简单，材料利用率高，良品率高的OLED器件。
发明内容
本发明的目的在于提供一种OLED器件的制备方法及其制得的OLED器件，其发光层中的各种子像素均采用溶液成膜法制备，其中，至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备，所述OLED器件的制作过程中不需要使用精细掩膜板，因此制作成本低，材料利用率高，良品率高。
为实现上述目的，本发明提供一种OLED器件的制备方法，包括：
步骤1、提供一基板，并在基板上依次形成阳极与空穴传输层；
步骤2、在空穴传输层上通过溶液成膜法制作发光层，所述发光层包括红色子像素、绿色子像素、蓝色子像素与白色子像素，其中，至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备；
步骤3、在发光层上依次形成电子传输层与阴极；
步骤4、提供一封装盖板，其设置于阴极上方，将所述基板与封装盖板(2)通过密封胶框粘结起来，从而完成该OLED器件的封装。
所述阳极、空穴传输层、电子传输层、及阴极分别采用真空热蒸镀法制备；所述电子传输层由八羟基喹啉铝形成，所述空穴传输层由聚三苯胺或者聚乙撑二氧噻吩形成。
所述基板为TFT基板，所述基板与封装盖板由玻璃或者柔性材料形成，所述基板与封装盖板中至少一个透光。
所述步骤2中，所述至少一种子像素采用量子点制备，如果是红色子像素采用量子点制备，则所述红色子像素通过有机主体材料与红光量子点及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素采用量子点制备，则所述绿色子像素通过有机主体材料与绿光量子点及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素采用量子点制备，则所述蓝色子像素通过有机主体材料与蓝光量子点及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素采用量子点制备，则所述白色子像素通过有机主体材料与白光量子点及溶剂混合，涂覆并挥发去除溶剂后得到，或者通过有机主体材料与红光量子点、绿光量子点和蓝光量子点的组合及溶剂 混合，涂覆并挥发去除溶剂后得到；所述蓝光量子点为ZnCdS、CdSe/ZnS或纳米SiN4，所述绿光量子点为CdSe/ZnS或ZnSe：Cu2+，所述红光量子点为CdSe/CdS/ZnS，所述白光量子点为CdSe、CdS、CdTe、CdMnS、ZnSe或ZnMnSe；所述有机主体材料为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；所述溶剂为甲醇、乙醇、氯苯或氯仿。
所述步骤2中，所述至少一种子像素采用量子点制备，如果是红色子像素采用量子点制备，则所述红色子像素通过红光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素采用量子点制备，则所述绿色子像素通过绿光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素采用量子点制备，则所述蓝色子像素通过蓝光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素采用量子点制备，则所述白色子像素通过白光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到，或者通过红光量子点、绿光量子点和蓝光量子点的组合与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；所述表面包覆剂为硬脂酸、氧化三锌基膦或聚甲基丙烯酸甲酯；所述溶剂为甲醇、乙醇、水、氯苯或氯仿；所述蓝光量子点为ZnCdS、CdSe/ZnS或纳米SiN4，所述绿光量子点为CdSe/ZnS或ZnSe：Cu2+，所述红光量子点为CdSe/CdS/ZnS，所述白光量子点为CdSe、CdS、CdTe、CdMnS、ZnSe或ZnMnSe。
所述步骤2中，所述至少一种子像素采用量子点制备为所述蓝色子像素采用量子点制备。
所述步骤2中，所述至少一种子像素采用有机发光材料制备，如果是红色子像素采用有机发光材料制备，则所述红色子像素通过有机主体材料与红光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素采用有机发光材料制备，则所述绿色子像素通过有机主体材料与绿光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素采用有机发光材料制备，则所述蓝色子像素通过有机主体材料与蓝光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素采用有机发光材料制备，则所述白色子像素通过有机主体材料与红光发光材料、绿光发光材料、蓝光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；所述蓝光发光材料为9,10-二(β-萘基)蒽，所述绿光发光材料为三(2-苯基吡啶)合铱，所述红光发光材料为4-(二巯基亚甲基)-2-甲基-6-(对二甲氨基苯乙烯基)-4H-吡喃；所述有机主体材料为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；所述溶剂为甲醇、乙醇、氯苯或氯仿。
所述步骤2中，至少一种子像素采用有机发光材料制备为所述红色子像素、绿色子像素与白色子像素采用有机发光材料制备。
本发明还提供一种采用如权利要求1所述的制备方法制备的OLED器件，包括基板、形成于基板上的阳极、形成于阳极上的空穴传输层、形成于空穴传输层上的发光层、形成于发光层上的电子传输层、形成于电子传输层上的阴极、设于阴极上方的封装盖板、及设于基板与封装盖板之间粘结所述基板与封装盖板的密封胶框，所述发光层包括红色子像素、绿色子像素、蓝色子像素与白色子像素，所述发光层中的各种子像素均通过溶液成膜法制备，其中，至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备。
所述蓝色子像素采用量子点制备，所述红色子像素、绿色子像素与白色子像素采用有机发光材料制备。
本发明的有益效果：本发明提供的一种OLED器件的制备方法，其发光层中的各种子像素均采用溶液成膜法制备，所述阳极、空穴传输层、电子传输层、及阴极采用真空热蒸镀法制备，因此该OLED器件的制备方法中不需要使用精细掩膜板，使得该制备方法的制作成本低，材料利用率高，良品率高；并且通过设置所述发光层中的至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备，使得本发明的制备方法与全部子像素采用量子点的制备方法相比，制作成本更低，与全部子像素采用有机发光材料的制备方法相比，所得到的OLED器件的性能更好；本发明制得的OLED器件结合了量子点OLED与溶液成膜OLED的优点，从而具有优良的性能，可应用于平面显示器、电视机及其他显示领域。
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它有益效果显而易见。
附图中，
图1为本发明OLED器件的制备方法的示意流程图；
图2为本发明OLED器件的结构示意图；
图3为本发明OLED器件的一种像素排列结构的平面示意图；
图4为图3所示的像素排列结构用于显示面板时的示意图；
图5为图3所示的像素排列结构的TFT驱动电路结构示意图；
图6为本发明OLED器件的另一种像素排列结构的平面示意图；
图7为图6所示的像素排列结构用于显示面板时的示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段极其效果，以下结合本发明的优选实施例极其附图进行详细描述。
请参阅图1，本发明提供一种OLED器件的制备方法，包括：
步骤1、提供一基板1，并在基板1上依次形成阳极21与空穴传输层22；
步骤2、在空穴传输层22上通过溶液成膜法制作发光层23，所述发光层23包括红色子像素231、绿色子像素232、蓝色子像素233与白色子像素234，其中，至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备。
步骤3、在发光层23上依次形成电子传输层24与阴极25；
步骤4、提供一封装盖板2，其设置于阴极25上方，将所述基板1与封装盖板2通过密封胶框3粘结起来，从而完成该OLED器件的封装。
所述步骤2中，所述至少一种子像素采用量子点制备，如果是红色子像素231采用量子点制备，则所述红色子像素231可通过有机主体材料与红光量子点及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素232采用量子点制备，则所述绿色子像素232可通过有机主体材料与绿光量子点及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素233采用量子点制备，则所述蓝色子像素233可通过有机主体材料与蓝光量子点及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素234采用量子点制备，则所述白色子像素234可通过有机主体材料与白光量子点及溶剂混合，涂覆并挥发去除溶剂后得到，或者通过有机主体材料与红光量子点、绿光量子点和蓝光量子点的组合及溶剂混合，涂覆并挥发去除溶剂后得到。其中，所述有机主体材料为TCTA(4,4',4″-三(咔唑-9-基)三苯胺)或TRZ(2,4,6-三(9H-咔唑-9-基)-1,3,5-三嗪)；
所述化合物TCTA(4,4',4″-三(咔唑-9-基)三苯胺)的结构式为：
Figure PCTCN2014089957-appb-000001
所述化合物TRZ(2,4,6-三(9H-咔唑-9-基)-1,3,5-三嗪)的结构式为：
Figure PCTCN2014089957-appb-000002
所述溶剂为甲醇、乙醇、氯苯或氯仿等。
所述步骤2中，所述至少一种子像素采用量子点制备，如果是红色子像素231采用量子点制备，则所述红色子像素231也可以通过红光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素232采用量子点制备，则所述绿色子像素232也可以通过绿光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素233采用量子点制备，则所述蓝色子像素233也可以通过蓝光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素234采用量子点制备，则所述白色子像素234也可以通过白光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到，或者通过红光量子点、绿光量子点和蓝光量子点的组合与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；
其中，所述蓝光量子点为ZnCdS、CdSe/ZnS或纳米SiN4等，所述绿光量子点为CdSe/ZnS或ZnSe：Cu2+等，所述红光量子点为CdSe/CdS/ZnS等，所述白光量子点为CdSe、CdS、CdTe、CdMnS、ZnSe或ZnMnSe等Ⅱ～Ⅵ族量子点；
所述表面包覆剂为硬脂酸、氧化三锌基膦或聚甲基丙烯酸甲酯；
所述溶剂为甲醇、乙醇、水、氯苯或氯仿等。
优选的，所述步骤2中，所述至少一种子像素采用量子点制备为所述蓝色子像素233采用量子点制备。
在上述采用量子点制备子像素的方法中，所述有机主体材料与表面包覆剂具有一个共同的作用，即防止量子点团聚与氧化。因为量子点是纳米颗粒，零维材料，表面活性大，因此容易发生团聚，导致氧化并使荧光淬灭。
所述步骤2中，所述至少一种子像素采用有机发光材料制备，如果是红色子像素231采用有机发光材料制备，则所述红色子像素231通过有机主体材料与红光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素232采用有机发光材料制备，则所述绿色子像素232通过有机主体材料与绿光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如 果是蓝色子像素233采用有机发光材料制备，则所述蓝色子像素233通过有机主体材料与蓝光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素234采用有机发光材料制备，则所述白色子像素234通过有机主体材料与红光发光材料、绿光发光材料、蓝光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；
其中，所述有机主体材料为TCTA(4,4',4″-三(咔唑-9-基)三苯胺)或TRZ(2,4,6-三(9H-咔唑-9-基)-1,3,5-三嗪)，所述溶剂为甲醇、乙醇、水、氯苯或氯仿等；
所述蓝光发光材料可以为9,10-二(β-萘基)蒽(ADN)，其结构式为
Figure PCTCN2014089957-appb-000003
所述绿光发光材料可以为三(2-苯基吡啶)合铱(Ir(ppy)3)，其结构式为
Figure PCTCN2014089957-appb-000004
所述红光发光材料可以为4-(二巯基亚甲基)-2-甲基-6-(对二甲氨基苯乙烯基)-4H-吡喃(DCM)，其结构式为
Figure PCTCN2014089957-appb-000005
优选的，所述步骤2中，所述至少一种子像素采用有机发光材料制备为所述红色子像素231、绿色子像素232与白色子像素234采用有机发光材料制备。
其中，所述基板1为TFT基板，所述基板1与封装盖板2由玻璃或柔性材料形成，所述基板1与封装盖板2中至少一个透光。优选的，所述基板1与封装盖板2均为玻璃板。所述基板1与封装盖板2通过密封胶框3粘结在一起，可以防止外界的水汽、氧气进入，从而密封与保护内部电子器件。
所述阳极21、空穴传输层22、电子传输层24、及阴极25分别采用真 空热蒸镀法制备，不需要精细掩膜板(FMM)。优选的，所述电子传输层24由八羟基喹啉铝(Alq3)等材料形成，所述空穴传输层22由聚三苯胺(poly-TPD)或者聚乙撑二氧噻吩(PEDOT)等材料形成。
请参阅图2，基于上述制备方法，本发明还提供一种OLED器件，包括基板1、形成于基板1上的阳极21、形成于阳极21上的空穴传输层22、形成于空穴传输层22上的发光层23、形成于发光层23上的电子传输层24、形成于电子传输层24上的阴极25、设于阴极25上方的封装盖板2、及设于基板1与封装盖板2之间粘结所述基板1与封装盖板2的密封胶框3。
所述发光层23包括红色子像素231、绿色子像素232、蓝色子像素233及白色子像素234，其中，所有子像素均通过溶液成膜法制备，至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备。优选的，所述蓝色子像素233采用量子点制备。
优选的，所述蓝色子像素233采用量子点制备，所述红色子像素231、绿色子像素232与白色子像素234采用有机发光材料制备。
所述至少一种子像素采用量子点制备，如果是红色子像素231采用量子点制备，则所述红色子像素231也可以通过红光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素232采用量子点制备，则所述绿色子像素232也可以通过绿光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素233采用量子点制备，则所述蓝色子像素233也可以通过蓝光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素234采用量子点制备，则所述白色子像素234也可以通过白光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到，或者通过红光量子点、绿光量子点和蓝光量子点的组合与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；
其中，所述有机主体材料为TCTA(4,4',4″-三(咔唑-9-基)三苯胺)或TRZ(2,4,6-三(9H-咔唑-9-基)-1,3,5-三嗪)；
所述化合物TCTA(4,4',4″-三(咔唑-9-基)三苯胺)的结构式为：
Figure PCTCN2014089957-appb-000006
所述化合物TRZ(2,4,6-三(9H-咔唑-9-基)-1,3,5-三嗪)的结构式为：
Figure PCTCN2014089957-appb-000007
所述溶剂为甲醇、乙醇、氯苯或氯仿等。
所述至少一种子像素采用量子点制备，如果是红色子像素231采用量子点制备，则所述红色子像素231也可以通过红光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素232采用量子点制备，则所述绿色子像素232也可以通过绿光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素233采用量子点制备，则所述蓝色子像素233也可以通过蓝光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素234采用量子点制备，则所述白色子像素234也可以通过白光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到，或者通过红光量子点、绿光量子点和蓝光量子点的组合与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；
其中，所述蓝光量子点为ZnCdS、CdSe/ZnS或纳米SiN4等，所述绿光量子点为CdSe/ZnS或ZnSe：Cu2+等，所述红光量子点为CdSe/CdS/ZnS等，所述白光量子点为CdSe、CdS、CdTe、CdMnS、ZnSe或ZnMnSe等Ⅱ～Ⅵ族量子点；
所述表面包覆剂为硬脂酸、氧化三锌基膦或聚甲基丙烯酸甲酯；
所述溶剂为甲醇、乙醇、水、氯苯或氯仿等。
在上述采用量子点制备子像素的方法中，所述有机主体材料与表面包覆剂具有一个共同的作用，即防止量子点团聚与氧化。因为量子点是纳米颗粒，零维材料，表面活性大，因此容易发生团聚，导致氧化并使荧光淬灭。
所述至少一种子像素采用有机发光材料制备，如果是红色子像素231采用有机发光材料制备，则所述红色子像素231通过有机主体材料与红光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素232采用有机发光材料制备，则所述绿色子像素232通过有机主体材料与绿光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素233采用有机发光材料制备，则所述蓝色子像素233通过有机主体材料与蓝光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素234采用有机发光材料制备，则所述白色子像素234通过有机主体材料与红光 发光材料、绿光发光材料、蓝光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；
其中，所述有机主体材料为TCTA(4,4',4″-三(咔唑-9-基)三苯胺)或TRZ(2,4,6-三(9H-咔唑-9-基)-1,3,5-三嗪)，所述溶剂为甲醇、乙醇、水、氯苯或氯仿等；
所述蓝光发光材料可以为9,10-二(β-萘基)蒽(ADN)，其结构式为
Figure PCTCN2014089957-appb-000008
所述绿光发光材料可以为三(2-苯基吡啶)合铱(Ir(ppy)3)，其结构式为
Figure PCTCN2014089957-appb-000009
所述红光发光材料可以为4-(二巯基亚甲基)-2-甲基-6-(对二甲氨基苯乙烯基)-4H-吡喃(DCM)，其结构式为
Figure PCTCN2014089957-appb-000010
本发明的OLED器件中，所述基板1为TFT基板，所述基板1与封装盖板2由玻璃或柔性材料形成，所述基板1与封装盖板2中至少一个透光。优选的，所述基板1与封装盖板2均为玻璃板。所述基板1与封装盖板2通过密封胶框3粘结在一起，可以防止外界的水汽、氧气进入，从而密封与保护内部电子器件。
所述阳极21、空穴传输层22、电子传输层24、及阴极25分别采用真空热蒸镀法制备，不需要精细掩膜板(FMM)。优选的，所述电子传输层24由八羟基喹啉铝(Alq3)等材料形成，所述空穴传输层22由聚三苯胺(poly-TPD)或者聚乙撑二氧噻吩(PEDOT)等材料形成。
请参阅图3，其为本发明OLED器件的一种像素排列结构的平面示意图；图4为图3所示的像素排列结构用于显示面板时的示意图。如图5所示，所述红色子像素231、绿色子像素232、蓝色子像素233及白色子像素 234分别通过一个TFT(薄膜晶体管)4驱动。每个子像素对应一个TFT，以控制每个子像素对应的发光层区域是否发光。
请参阅图6，其为本发明OLED器件的另一种像素排列结构的平面示意图；图7为图6所示的像素排列结构用于显示面板时的示意图。
综上所述，本发明提供的一种OLED器件的制备方法，其发光层中的各种子像素均采用溶液成膜法制备，所述阳极、空穴传输层、电子传输层、及阴极采用真空热蒸镀法制备，因此该OLED器件的制备方法中不需要使用精细掩膜板，使得该制备方法的制作成本低，材料利用率高，良品率高；并且通过设置所述发光层中的至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备，使得本发明的制备方法与全部子像素采用量子点的制备方法相比，制作成本更低，与全部子像素采用有机发光材料的制备方法相比，所得到的OLED器件的性能更好；本发明制得的OLED器件结合了量子点OLED与溶液成膜OLED的优点，从而具有优良的性能，可应用于平面显示器、电视机及其他显示领域。
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 (11)

  1. 一种OLED器件的制备方法，包括：
    步骤1、提供一基板，并在基板上依次形成阳极与空穴传输层；
    步骤2、在空穴传输层上通过溶液成膜法制作发光层，所述发光层包括红色子像素、绿色子像素、蓝色子像素与白色子像素，其中，至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备；
    步骤3、在发光层上依次形成电子传输层与阴极；
    步骤4、提供一封装盖板，其设置于阴极上方，将所述基板与封装盖板通过密封胶框粘结起来，从而完成该OLED器件的封装。
  2. 如权利要求1所述的OLED器件的制备方法，其中，所述阳极、空穴传输层、电子传输层、及阴极分别采用真空热蒸镀法制备；所述电子传输层由八羟基喹啉铝形成，所述空穴传输层由聚三苯胺或者聚乙撑二氧噻吩形成。
  3. 如权利要求1所述的OLED器件的制备方法，其中，所述基板为TFT基板，所述基板与封装盖板由玻璃或者柔性材料形成，所述基板与封装盖板中至少一个透光。
  4. 如权利要求1所述的OLED器件的制备方法，其中，所述步骤2中，所述至少一种子像素采用量子点制备，如果是红色子像素采用量子点制备，则所述红色子像素通过有机主体材料与红光量子点及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素采用量子点制备，则所述绿色子像素通过有机主体材料与绿光量子点及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素采用量子点制备，则所述蓝色子像素通过有机主体材料与蓝光量子点及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素采用量子点制备，则所述白色子像素通过有机主体材料与白光量子点及溶剂混合，涂覆并挥发去除溶剂后得到，或者通过有机主体材料与红光量子点、绿光量子点和蓝光量子点的组合及溶剂混合，涂覆并挥发去除溶剂后得到；所述蓝光量子点为ZnCdS、CdSe/ZnS或纳米SiN4，所述绿光量子点为CdSe/ZnS或ZnSe：Cu2+，所述红光量子点为CdSe/CdS/ZnS，所述白光量子点为CdSe、CdS、CdTe、CdMnS、ZnSe或ZnMnSe；所述有机主体材料为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；所述溶剂为甲醇、乙醇、氯苯或氯仿。
  5. 如权利要求1所述的OLED器件的制备方法，其中，所述步骤2中， 所述至少一种子像素采用量子点制备，如果是红色子像素采用量子点制备，则所述红色子像素通过红光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素采用量子点制备，则所述绿色子像素通过绿光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素采用量子点制备，则所述蓝色子像素通过蓝光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素采用量子点制备，则所述白色子像素通过白光量子点与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到，或者通过红光量子点、绿光量子点和蓝光量子点的组合与表面包覆剂及溶剂混合，涂覆并挥发去除溶剂后得到；所述表面包覆剂为硬脂酸、氧化三锌基膦或聚甲基丙烯酸甲酯；所述溶剂为甲醇、乙醇、水、氯苯或氯仿；所述蓝光量子点为ZnCdS、CdSe/ZnS或纳米SiN4，所述绿光量子点为CdSe/ZnS或ZnSe：Cu2+，所述红光量子点为CdSe/CdS/ZnS，所述白光量子点为CdSe、CdS、CdTe、CdMnS、ZnSe或ZnMnSe。
  6. 如权利要求1所述的OLED器件的制备方法，其中，所述步骤2中，所述至少一种子像素采用量子点制备为所述蓝色子像素采用量子点制备。
  7. 如权利要求1所述的OLED器件的制备方法，其中，所述步骤2中，所述至少一种子像素采用有机发光材料制备，如果是红色子像素采用有机发光材料制备，则所述红色子像素通过有机主体材料与红光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是绿色子像素采用有机发光材料制备，则所述绿色子像素通过有机主体材料与绿光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是蓝色子像素采用有机发光材料制备，则所述蓝色子像素通过有机主体材料与蓝光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；如果是白色子像素采用有机发光材料制备，则所述白色子像素通过有机主体材料与红光发光材料、绿光发光材料、蓝光发光材料及溶剂混合，涂覆并挥发去除溶剂后得到；所述蓝光发光材料为9,10-二(β-萘基)蒽，所述绿光发光材料为三(2-苯基吡啶)合铱，所述红光发光材料为4-(二巯基亚甲基)-2-甲基-6-(对二甲氨基苯乙烯基)-4H-吡喃；所述有机主体材料为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；所述溶剂为甲醇、乙醇、氯苯或氯仿。
  8. 如权利要求1所述的OLED器件的制备方法，其中，所述步骤2中，至少一种子像素采用有机发光材料制备为所述红色子像素、绿色子像素与白色子像素采用有机发光材料制备。
  9. 一种采用如权利要求1所述的制备方法制备的OLED器件，包括基 板、形成于基板上的阳极、形成于阳极上的空穴传输层、形成于空穴传输层上的发光层、形成于发光层上的电子传输层、形成于电子传输层上的阴极、设于阴极上方的封装盖板、及设于基板与封装盖板之间粘结所述基板与封装盖板的密封胶框，所述发光层包括红色子像素、绿色子像素、蓝色子像素与白色子像素，其中，所述发光层中的各种子像素均通过溶液成膜法制备，其中，至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备。
  10. 如权利要求9所述的OLED器件，其中，所述蓝色子像素采用量子点制备，所述红色子像素、绿色子像素与白色子像素采用有机发光材料制备。
  11. 一种采用如权利要求1所述的制备方法制备的OLED器件，包括基板、形成于基板上的阳极、形成于阳极上的空穴传输层、形成于空穴传输层上的发光层、形成于发光层上的电子传输层、形成于电子传输层上的阴极、设于阴极上方的封装盖板、及设于基板与封装盖板之间粘结所述基板与封装盖板的密封胶框，所述发光层包括红色子像素、绿色子像素、蓝色子像素与白色子像素，其中，所述发光层中的各种子像素均通过溶液成膜法制备，其中，至少一种子像素采用量子点制备，至少一种子像素采用有机发光材料制备；
    其中，所述蓝色子像素采用量子点制备，所述红色子像素、绿色子像素与白色子像素采用有机发光材料制备。
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