WO2016011710A1 - 有机电致发光器件及其制备方法、显示装置 - Google Patents

有机电致发光器件及其制备方法、显示装置 Download PDF

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WO2016011710A1
WO2016011710A1 PCT/CN2014/088708 CN2014088708W WO2016011710A1 WO 2016011710 A1 WO2016011710 A1 WO 2016011710A1 CN 2014088708 W CN2014088708 W CN 2014088708W WO 2016011710 A1 WO2016011710 A1 WO 2016011710A1
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electrode
substrate
pattern
light
layer
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French (fr)
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马群
元裕太
吴海东
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京东方科技集团股份有限公司
鄂尔多斯市源盛光电有限责任公司
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Priority to US14/769,262 priority Critical patent/US9716245B2/en
Publication of WO2016011710A1 publication Critical patent/WO2016011710A1/zh

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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/80Constructional details
    • H10K50/805Electrodes
    • H10K50/81Anodes
    • H10K50/813Anodes characterised by their shape
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/80Constructional details
    • H10K50/805Electrodes
    • H10K50/82Cathodes
    • H10K50/822Cathodes characterised by their shape
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/10Deposition of organic active material
    • H10K71/16Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
    • H10K71/166Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering using selective deposition, e.g. using a mask
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/621Providing a shape to conductive layers, e.g. patterning or selective deposition

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  • Embodiments of the present invention relate to an organic electroluminescent device, a method of fabricating the same, and a display device.
  • the organic electroluminescent device includes a substrate, a first electrode sequentially formed on the substrate, a light emitting layer, and a second electrode, wherein the light emitting layer is completely located between the first electrode and the second electrode, at the first electrode and the second electrode Lights under the action.
  • the preparation of the light-emitting layer mainly adopts an evaporation process, and the light-emitting layer is limited by the processing technology of the evaporation mask in the preparation process.
  • the size of the open area on the evaporation mask has been limited to a certain level or more, resulting in a smaller luminescent layer in the organic electroluminescent device, which in turn causes the organic electroluminescent device to fail to produce high resolution. Display. Therefore, it is difficult for an organic electroluminescence device to achieve high resolution of a display screen.
  • At least one embodiment of the present invention provides an organic electroluminescent device, a method for fabricating the same, and a display device, which facilitates high-resolution design of a display screen.
  • At least one embodiment of the present invention provides an organic electroluminescent device comprising: a substrate, a first electrode formed on the substrate, a light emitting layer formed on a side of the first electrode facing away from the substrate, and the light emitting layer a second electrode facing away from the first electrode side, only a portion of the projection of the light emitting layer on the substrate is located at an overlap of projections of the first electrode and the second electrode on the substrate Part.
  • At least one embodiment of the present invention provides a method of fabricating an organic electroluminescent device, comprising: sequentially forming a first electrode pattern, a light emitting layer pattern, and a second electrode pattern on a substrate, wherein the first electrode and the An overlapping portion of the projection of the second electrode on the substrate overlaps a projected portion of the luminescent layer on the substrate.
  • At least one embodiment of the present invention also provides an organic electro-electricity system provided in the above technical solution.
  • FIG. 1 is a schematic structural view of an organic electroluminescent device according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of an organic electroluminescent device according to another embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an organic electroluminescent device according to still another embodiment of the present invention.
  • FIG. 1 is a schematic structural view of an organic electroluminescent device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of an organic electroluminescent device according to another embodiment of the present invention
  • An organic electroluminescent device includes: a substrate 1, a first electrode 2 formed on the substrate 1, a light-emitting layer 3 formed on a side of the first electrode 2 facing away from the substrate 1, and a light-emitting layer 3 As shown in FIG. 1 , FIG. 2 and FIG. 3 , only a part of the projection of the light-emitting layer 3 on the substrate 1 is located on the first electrode 2 and the second electrode 4 on the substrate 1 as shown in FIGS. 1 , 2 and 3 . The overlap of the projections on the top.
  • the projection of the light-emitting layer 3 on the substrate 1 is located at an overlapping portion of the projection of the first electrode 2 and the second electrode 4 on the substrate 1, and the other portion of the light-emitting layer 3 is located at the first portion.
  • the electrode 2 and the second electrode 4 are outside the overlapping portion projected on the substrate 1. Since only the portion opposite to the first electrode 2 and the second electrode 4 in the light-emitting layer 3 can achieve light emission, only a part of the light-emitting layer 3 can realize light emission, and the other portion cannot be used for light emission.
  • the size of the light-emitting layer 3 in the organic electroluminescent device and the open area in the evaporation mask corresponds, and only a part of the light-emitting layer 3 of the above organic electroluminescence device can realize light emission, and the other portion of the light-emitting layer 3 is located in a non-light-emitting region in the organic electroluminescence device. Therefore, the size of the light-emitting layer 3 for the light-emitting portion is smaller than the size of the light-emitting layer 3.
  • the size of the portion for emitting light in the light-emitting layer 3 can be made smaller than the size level of the opening region in the vapor deposition mask.
  • the above organic electroluminescent device facilitates the high resolution design of the display screen.
  • the first electrode 2 has a strip structure
  • the second electrode 4 has a plate-like structure
  • a part of the projection of the luminescent layer 3 on the substrate 1 is located at the first electrode 2 .
  • the first electrode 2 has a strip structure
  • the second electrode 4 has a strip structure
  • the projections of the luminescent layer 3 on the substrate 1 are all located on the substrate of the first electrode 2 In the projection on 1, and only a part overlaps with the projection of the second electrode 4 on the substrate 1.
  • the first electrode 2 has a strip structure
  • the second electrode 4 has a strip structure
  • at least a portion of the projection of the luminescent layer 3 on the substrate 1 The projection of one electrode 2 on the substrate 1 overlaps and only a portion overlaps the projection of the second electrode 4 on the substrate 1.
  • the first electrode 2 is an anode
  • the second electrode 4 is a cathode
  • the first electrode 2 is a cathode
  • the second electrode 4 is an anode
  • the anode can be a transparent anode
  • the cathode can be a transparent or translucent cathode to increase the aperture ratio and light extraction rate of the organic electroluminescent device.
  • At least one embodiment of the present invention further provides a method for fabricating an organic electroluminescent device according to the above embodiments, comprising: sequentially forming a first electrode pattern, a light emitting layer pattern, and a second electrode pattern on a substrate, wherein The overlapping portion of the projection of the electrode and the second electrode on the substrate overlaps the projected portion of the luminescent layer on the substrate.
  • a specific example may include the following steps:
  • a second electrode layer is formed on the pattern of the light-emitting layer to form a second electrode, and the second electrode has a plate-like structure.
  • An organic electroluminescent device having the structure shown in Fig. 1 can be obtained by the above preparation method.
  • the step of sequentially forming the first electrode pattern, the luminescent layer pattern, and the second electrode pattern on the substrate may include the following steps:
  • the projection of the area on the substrate overlaps with the portion of the first electrode projected on the substrate only with a portion of the projection of the luminescent layer on the substrate.
  • An organic electroluminescent device having the structure shown in Fig. 3 can be obtained by the above preparation method.
  • the first electrode pattern, the luminescent layer pattern, and the second electrode pattern are sequentially formed on the substrate as described in the method for fabricating the organic electroluminescent device.
  • One specific example may further include the following steps:
  • the first electrode is within the projection on the substrate
  • An organic electroluminescent device having the structure shown in Fig. 2 can be obtained by the above preparation method.
  • the organic electroluminescent device of the three structures shown in FIG. 1, FIG. 2, and FIG. 3 can make only a part of the luminescent layer 3 for illuminating, which is convenient for realizing high-resolution design of the display screen, Preparation Method The preparation of an organic electroluminescent device facilitates the high resolution design of the display screen.
  • At least one embodiment of the present invention also provides a display device including the organic electroluminescent device provided by the above embodiments, which can realize a high resolution design.
  • the display device may be a product or a component having any display function such as a liquid crystal panel, an electronic paper, a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer, or a watch.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

一种有机电致发光器件及其制备方法、显示装置,有机电致发光器件包括:基板(1)、形成于基板(1)上的第一电极(2)、形成于第一电极(2)背离基板(1)一侧的发光层(3)、位于发光层(3)背离第一电极(2)一侧的第二电极(4),发光层(3)在基板上(1)的投影中只有一部分位于第一电极(2)和第二电极(4)在基板(1)上的投影的交叠部位。该有机电致发光器件可以便于实现显示屏的高分辨率设计。

Description

有机电致发光器件及其制备方法、显示装置 技术领域
本发明的实施例涉及一种有机电致发光器件及其制备方法、显示装置。
背景技术
随着显示技术的发展,有机电致发光器件(OELD)显示屏由于具有高响应速度、高色域以及超薄等优点,逐渐成为市场主导。有机电致发光器件包括基板、依次形成于基板上的第一电极、发光层、第二电极,其中,发光层完全位于第一电极和第二电极之间,在第一电极和第二电极的作用下发光。
有机电致发光器件在制备过程中,发光层的制备主要采用蒸镀工艺,发光层在制备过程中受到蒸镀掩膜板加工工艺的限制。蒸镀掩膜板上开口区域的尺寸大小一直限制在一定的级别以上,导致有机电致发光器件中的发光层不能做的更小,进而导致有机电致发光器件一直无法做出高分辨率的显示屏。因此,有机电致发光器件很难实现显示屏的高分辨率。
发明内容
本发明至少一实施例提供了一种有机电致发光器件及其制备方法、显示装置,该有机电致发光器件便于实现显示屏的高分辨率设计。
本发明至少一实施例提供一种有机电致发光器件,其包括:基板、形成于基板上的第一电极、形成于所述第一电极背离所述基板一侧的发光层、位于所述发光层背离所述第一电极一侧的第二电极,所述发光层在所述基板上的投影中只有一部分位于所述第一电极和所述第二电极在所述基板上的投影的交叠部位。
本发明至少一实施例还提供了一种有机电致发光器件的制备方法,包括:在基板上依次形成第一电极图形、发光层图形以及第二电极图形,其中,所述第一电极和所述第二电极在所述基板上的投影的交叠部位与所述发光层在所述基板上的投影部分交叠。
本发明至少一实施例还提供了一种包括上述技术方案中提供的有机电致 发光器件的显示装置。
附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对实施例的附图作简单地介绍,显而易见地,下面描述中的附图仅仅涉及本发明的一些实施例,而非对本发明的限制。
图1为本发明一个实施例提供的有机电致发光器件的结构示意图;
图2为本发明另一个实施例提供的有机电致发光器件的结构示意图;
图3为本发明再一个实施例提供的有机电致发光器件的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例的附图,对本发明实施例的技术方案进行清楚、完整地描述。显然,所描述的实施例是本发明的一部分实施例,而不是全部的实施例。基于所描述的本发明的实施例,本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护的范围。
图1为本发明一个实施例提供的有机电致发光器件的结构示意图;图2为本发明另一个实施例提供的有机电致发光器件的结构示意图;图3为本发明再一个实施例提供的有机电致发光器件的结构示意图。
本发明至少一实施例提供的有机电致发光器件,包括:基板1、形成于基板1上的第一电极2、形成于第一电极2背离基板1一侧的发光层3、位于发光层3背离第一电极2一侧的第二电极4,如图1、图2和图3所示,发光层3在基板1上的投影中只有一部分位于第一电极2和第二电极4在基板1上的投影的交叠部位。
上述有机电致发光器件中,发光层3在基板1上的投影中只有一部分位于第一电极2和第二电极4在基板1上的投影的交叠部位,发光层3的另一部分位于第一电极2和第二电极4在基板1上投影的交叠部位之外。由于发光层3中只有与第一电极2和第二电极4之间正对部位才能实现发光,因此,发光层3中只有一部分能够实现发光,另一部分不能用于发光。
由于有机电致发光器件中,发光层3的尺寸与蒸镀掩膜板中开口区域的 尺寸对应,而上述有机电致发光器件的发光层3中只有一部分能够实现发光,而发光层3中的另一部分位于有机电致发光器件中的非发光区域。因此,发光层3中用于发光部分的尺寸小于发光层3的尺寸。所以,即使蒸镀掩膜板中开口区域的尺寸被限制在一定的级别以上,也可以使发光层3中用于发光的部分的尺寸级别小于蒸镀掩膜板中开口区域的尺寸级别。
所以,上述有机电致发光器件便于实现显示屏的高分辨率设计。
如图1所示,在本发明一实施例中,第一电极2具有条形结构,第二电极4具有板状结构,发光层3在基板1上的投影中的一部分位于与第一电极2在基板1上的投影内。
如图2所示,在本发明另一实施例中,第一电极2具有条形结构,第二电极4具有条形结构,发光层3在基板1上的投影全部位于第一电极2在基板1上的投影中,且只有一部分与第二电极4在基板1上的投影交叠。
或者,如图3所示,在本发明再一实施例中,第一电极2具有条形结构,第二电极4具有条形结构,发光层3在基板1上的投影中,至少一部分与第一电极2在基板1上的投影交叠,且只有一部分与第二电极4在基板1上的投影交叠。
图1、图2、图3所示的三种结构的有机电致发光器件中都能够使发光层3中只有一部分用于发光,便于实现显示屏的高分辨率设计。
在本发明至少一实施例中:
上述第一电极2为阳极,且上述第二电极4为阴极;或者,上述第一电极2为阴极,且上述第二电极4为阳极。例如,所述阳极可以为透明阳极,所述阴极可以为透明或半透明阴极,以提高有机电致发光器件的开口率和出光率。
本发明至少一实施例还提供了一种上述实施例提供的有机电致发光器件的制备方法,包括:在基板上依次形成第一电极图形、发光层图形以及第二电极图形,其中,第一电极和第二电极在基板上的投影的交叠部位与发光层在基板上的投影部分交叠。
本发明一实施例中,上述在基板上依次形成第一电极图形、发光层图形以及第二电极图形的步骤中,一个具体示例可以包括下述步骤:
在基板上形成第一电极层,并通过构图工艺形成具有条形结构的第一电 极的图形;
在第一电极的图形上形成有机层,并通过构图工艺形成发光层的图形,其中,在通过构图工艺形成发光层的图形时,使掩膜板中形成发光层的区域与第一电极的图形之间相互错位,以使形成的发光层在基板上投影中只有一部分位于第一电极在基板上的投影内;
在发光层的图形上形成第二电极层以形成第二电极,第二电极具有板状结构。
通过上述制备方法可以得到如图1所示结构的有机电致发光器件。
本发明另一实施例中,上述在基板上依次形成第一电极图形、发光层图形以及第二电极图形的步骤,一个具体示例可以包括下述步骤:
在基板上形成第一电极层,并通过构图工艺形成具有条形结构的第一电极的图形;
在第一电极的图形上形成有机层,并通过构图工艺形成发光层的图形,其中,在通过构图工艺形成发光层的图形时,使掩膜板中形成发光层的区域与第一电极的图形之间相互错位,以使形成的发光层在基板上投影中只有一部分位于第一电极在基板上的投影内;
在发光层的图形上形成第二电极层,并通过构图工艺形成具有条形结构的第二电极,其中,在通过构图工艺形成第二电极的图形时,使掩膜板中形成第二电极图形的区域在基板上的投影与第一电极在基板上投影的交叠部位只与发光层在基板上投影中的一部分交叠。
通过上述制备方法可以得到如图3所示结构的有机电致发光器件。
本发明再一实施例中,上述有机电致发光器件的制备方法中记载的在基板上依次形成第一电极图形、发光层图形以及第二电极图形,一个具体示例还可以包括如下步骤:
在基板上形成第一电极层,并通过构图工艺形成具有条形结构的第一电极的图形;
在第一电极的图形上形成有机层,并通过构图工艺形成发光层的图形,其中,在通过构图工艺形成发光层的图形时,使掩膜板中形成发光层的区域在基板上的投影位于第一电极在基板上的投影内;
在发光层的图形上形成第二电极层,并通过构图工艺形成具有条形结构 的第二电极,其中,在通过构图工艺形成第二电极的图形时,使掩膜板中形成第二电极图形的区域在基板上的投影与第一电极在基板上投影的交叠部位只与发光层在基板上投影中的一部分交叠。
通过上述制备方法能够得到如图2所示结构的有机电致发光器件。
因为,图1、图2、图3所示的三种结构的有机电致发光器件中都能够使发光层3中只有一部分用于发光,便于实现显示屏的高分辨率设计,所以,采用上述制备方法制备有机电致发光器件便于实现显示屏的高分辨率设计。
本发明至少一实施例还提供了一种包括上述实施例提供的有机电致发光器件的显示装置,能够实现高分辨率设计。该显示装置可以为:液晶面板、电子纸、液晶电视、液晶显示器、数码相框、手机、平板电脑、手表等具有任何显示功能的产品或部件。
以上所述仅是本发明的示范性实施方式,而非用于限制本发明的保护范围,本发明的保护范围由所附的权利要求确定。
本申请要求于2014年7月25日递交的中国专利申请第201410360463.9号的优先权,在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (10)

  1. 一种有机电致发光器件,包括:基板、形成于基板上的第一电极、形成于所述第一电极背离所述基板一侧的发光层、位于所述发光层背离所述第一电极一侧的第二电极,
    其中,所述发光层在所述基板上的投影中只有一部分位于所述第一电极和所述第二电极在所述基板上的投影的交叠部位。
  2. 根据权利要求1所述的有机电致发光器件,其中,所述第一电极具有条形结构,所述第二电极具有板状结构,所述发光层在所述基板上的投影中的一部分位于所述第一电极在所述基板上的投影内。
  3. 根据权利要求1所述的有机电致发光器件,其中,所述第一电极具有条形结构,所述第二电极具有条形结构,所述发光层在所述基板上的投影中,至少一部分与所述第一电极在所述基板上的投影交叠,且只有一部分与所述第二电极在所述基板上的投影交叠。
  4. 根据权利要求1~3任一所述的有机电致发光器件,其中,所述第一电极为阳极,所述第二电极为阴极,或者,所述第一电极为阴极,所述第二电极为阳极。
  5. 一种有机电致发光器件的制备方法,包括:
    在基板上依次形成第一电极图形、发光层图形以及第二电极图形,
    其中,所述第一电极和所述第二电极在所述基板上的投影的交叠部位与所述发光层在所述基板上的投影部分交叠。
  6. 根据权利要求5所述的制备方法,其中,
    在基板上形成第一电极层,并通过构图工艺形成具有条形结构的第一电极的图形;
    在所述第一电极的图形上形成有机层,并通过构图工艺形成发光层的图形,其中,在通过构图工艺形成发光层的图形时,使掩膜板中形成发光层的区域与第一电极的图形之间相互错位,以使形成的发光层在基板上投影中只有一部分位于所述第一电极在基板上的投影内;
    在发光层的图形上形成第二电极层以形成所述第二电极的图形,所述第二电极的图形具有板状结构。
  7. 根据权利要求5所述的制备方法,其中,
    在基板上形成第一电极层,并通过构图工艺形成具有条形结构的第一电极的图形;
    在所述第一电极的图形上形成有机层,并通过构图工艺形成发光层的图形,其中,在通过构图工艺形成发光层的图形时,使掩膜板中形成发光层的区域与第一电极的图形之间相互错位,以使形成的发光层在基板上投影中只有一部分位于所述第一电极在基板上的投影内;
    在发光层的图形上形成第二电极层,并通过构图工艺形成具有条形结构的第二电极的图形,其中,在通过构图工艺形成第二电极的图形时,使掩膜板中形成第二电极图形的区域在基板上的投影与第一电极在基板上投影的交叠部位只与发光层在基板上投影中的一部分交叠。
  8. 根据权利要求5所述的制备方法,其中,
    在基板上形成第一电极层,并通过构图工艺形成具有条形结构的第一电极的图形;
    在所述第一电极的图形上形成有机层,并通过构图工艺形成发光层的图形,其中,在通过构图工艺形成发光层的图形时,使掩膜板中形成发光层的区域在基板上的投影位于第一电极在基板上的投影内;
    在发光层的图形上形成第二电极层,并通过构图工艺形成具有条形结构的第二电极的图形,其中,在通过构图工艺形成第二电极的图形时,使掩膜板中形成第二电极图形的区域在基板上的投影与第一电极在基板上投影的交叠部位只与发光层在基板上投影中的一部分交叠。
  9. 根据权利要求5~8任一项所述的制备方法,其中,所述第一电极为阳极,所述第二电极为阴极,或者,所述第一电极为阴极,所述第二电极为阳极。
  10. 一种显示装置,包括如权利要求1~4任一项所述的有机电致发光器件。
PCT/CN2014/088708 2014-07-25 2014-10-16 有机电致发光器件及其制备方法、显示装置 WO2016011710A1 (zh)

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