WO2018018895A1 - Oled阵列基板及其制作方法、oled显示面板 - Google Patents

Oled阵列基板及其制作方法、oled显示面板 Download PDF

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WO2018018895A1
WO2018018895A1 PCT/CN2017/076584 CN2017076584W WO2018018895A1 WO 2018018895 A1 WO2018018895 A1 WO 2018018895A1 CN 2017076584 W CN2017076584 W CN 2017076584W WO 2018018895 A1 WO2018018895 A1 WO 2018018895A1
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layer
spacer
array substrate
light emitting
functional layer
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PCT/CN2017/076584
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English (en)
French (fr)
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高志扬
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京东方科技集团股份有限公司
合肥京东方光电科技有限公司
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Priority to EP17784824.9A priority Critical patent/EP3493263B1/en
Priority to US15/568,990 priority patent/US10319794B2/en
Priority to EP21187950.7A priority patent/EP3923345A1/en
Publication of WO2018018895A1 publication Critical patent/WO2018018895A1/zh

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/80—Constructional details
    • H10K30/865—Intermediate layers comprising a mixture of materials of the adjoining active layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • H10K50/818—Reflective anodes, e.g. ITO combined with thick metallic layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H10K50/828—Transparent cathodes, e.g. comprising thin metal layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/852—Arrangements for extracting light from the devices comprising a resonant cavity structure, e.g. Bragg reflector pair
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/122—Pixel-defining structures or layers, e.g. banks
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/17—Passive-matrix OLED displays
    • H10K59/173—Passive-matrix OLED displays comprising banks or shadow masks
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/1201—Manufacture or treatment
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8051—Anodes
    • H10K59/80518—Reflective anodes, e.g. ITO combined with thick metallic layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8052—Cathodes
    • H10K59/80524—Transparent cathodes, e.g. comprising thin metal layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/876—Arrangements for extracting light from the devices comprising a resonant cavity structure, e.g. Bragg reflector pair

Definitions

  • the present disclosure relates generally to the field of display, and more particularly to an organic light emitting diode (OLED) array substrate, an OLED display panel including such an OLED array substrate, and a method of fabricating such an OLED array substrate.
  • OLED organic light emitting diode
  • the organic light emitting diode (OLED) display technology is a technology that realizes display by using an invertible color generated by an organic semiconductor material driven by a current.
  • OLED display has ultra-light, ultra-thin, high brightness, large viewing angle, low voltage, low power consumption, fast response, high definition, shock resistance, bendability, low cost, simple process, low use of raw materials, high luminous efficiency and temperature range The advantages of wideness are considered to be the most promising new generation display technology.
  • an OLED array substrate includes a first electrode layer, a pixel defining layer, an organic material functional layer, and a second electrode layer which are sequentially disposed in the light exiting direction.
  • the organic material functional layer includes a light emitting region that emits light of different colors.
  • the pixel definition layer includes a pixel region corresponding to the light emitting region, and a spacer region disposed between the adjacent pixel regions. Each of the spacer regions is used to electrically isolate adjacent light emitting regions.
  • the OLED array substrate proposed by the present disclosure by adopting an interval region electrically isolating adjacent light-emitting regions, it is possible to avoid adjacent different colors when a monochrome image is displayed by lighting a light-emitting region of only a certain color.
  • the light-emitting area is also faintly lit, thereby causing display abnormality, and therefore, the display effect of the display device can be improved.
  • the organic material functional layer includes a first functional layer, a light emitting layer, and a second functional layer that are sequentially disposed along the light exiting direction, and each of the spaced regions includes a first spacer and a second interval that are sequentially disposed along the light exiting direction. unit.
  • the first spacer is for separating portions of at least the first functional layer corresponding to the respective light emitting regions from each other.
  • the second functional layer corresponding to each of the light-emitting regions may be integrally formed, as compared to an implementation in which portions of the first functional layer, the light-emitting layer, and the second functional layer corresponding to the respective light-emitting regions are separated from each other, Therefore, the manufacturing process of such an OLED array substrate is simpler and the cost is also lower.
  • an angle between a sidewall of the first spacer and a lower surface of the first spacer is greater than an angle between a sidewall of the second spacer and a lower surface of the second spacer.
  • the first spacer and the second spacer may be The corner joints form corners so that portions of at least the first functional layer corresponding to the respective light-emitting regions separated from each other can be simultaneously formed, and thus the manufacturing process of the OLED array substrate is simpler and the cost is also lower.
  • an angle between a sidewall of the first spacer and a lower surface of the first spacer is greater than or equal to 60°, and an angle between a sidewall of the second spacer and a lower surface of the second spacer is less than Or equal to 30°.
  • the lateral etch rate of the material of the first spacer is greater than the lateral etch rate of the material of the second spacer.
  • the larger the lateral etching rate the larger the angle between the sidewall formed by the material and the lower surface thereof.
  • the width of the upper surface of the first spacer is less than or equal to the width of the lower surface of the second spacer.
  • a notch may be formed at the interface of the first spacer portion and the second spacer portion, whereby, portions of at least the first functional layer corresponding to the respective light-emitting regions separated from each other can be simultaneously formed, and thus the manufacturing process of the OLED array substrate is simpler and the cost is also lower.
  • the thickness of the first spacer is greater than the thickness of the first functional layer.
  • the thickness of the first spacer may simultaneously form portions of the first functional layer corresponding to the respective light-emitting regions separated from each other between the first spacers, so that the manufacturing process of the OLED array substrate is simpler and the cost is also lower.
  • the first functional layer is composed of at least one of a hole injection layer, a hole transport layer, and an electron blocking layer
  • the second functional layer is at least one of a hole blocking layer, an electron transport layer, and an electron injection layer.
  • the first electrode layer is an anode layer and the second electrode layer is a cathode layer.
  • the light emitting layer includes an organic light emitting layer and an optical compensation layer disposed between the organic light emitting layer and the first functional layer.
  • the optical compensation layer is used to adjust the effective optical cavity length in the functional layer of the organic material so that light of different colors exits at the maximum intensity in the functional layer of the organic material.
  • the first electrode layer is a reflective electrode layer and the second electrode layer is a transparent electrode layer.
  • an OLED display panel including any of the above OLED array substrates is provided.
  • a method of fabricating an OLED array substrate includes sequentially forming a first electrode layer, a pixel defining layer, an organic material functional layer, and a second electrode layer.
  • the organic material functional layer includes a light emitting region that emits light of different colors.
  • the pixel definition layer includes a pixel region corresponding to the light emitting region, and a spacer region disposed between the adjacent pixel regions. Each of the spacer regions is used to electrically isolate adjacent light emitting regions.
  • forming the functional layer of the organic material includes sequentially forming the first functional layer, the luminescent layer, and the second functional layer.
  • Each of the spaced regions includes a first spacer and a second spacer that are sequentially disposed in the light exiting direction.
  • the first spacer is for separating portions of at least the first functional layer corresponding to the respective light emitting regions from each other.
  • FIG. 1 schematically illustrates a cross-sectional view of an OLED array substrate according to the prior art.
  • FIG. 2 schematically illustrates a section of an OLED array substrate in accordance with an embodiment of the present disclosure. Surface map.
  • FIG. 3 schematically illustrates a cross-sectional view of an OLED array substrate in accordance with an embodiment of the present disclosure.
  • spatial relativity terms such as “under”, “below”, “below”, “above”, “on”, etc. may be used herein to describe The relationship between one component or component and another component or component as shown. It will be understood that the spatially relative terms are used to summarize different orientations of the device in use or operation in addition to the orientation shown in the drawings. For example, elements in the “following” or “beneath” other elements or components will be “above” the other elements or components. Thus, the exemplary term “below” can encompass both the above and the following.
  • the device can take other orientations (rotated 90 degrees or at other orientations), and the spatial relativity descriptors used here are interpreted accordingly.
  • RGB pixel including a red (R) light emitting region, a blue (B) light emitting region, and a green (G) light emitting region
  • R red
  • B blue
  • G green
  • the present disclosure is not limited to RGB pixel structures, but can equally be applied to pixel structures including other numbers and types of light emitting regions.
  • FIG. 1 schematically illustrates a cross-sectional view of an OLED array substrate according to the prior art.
  • the OLED array substrate 100 includes a substrate 101, a first electrode layer 102, a pixel defining layer 104, an organic material functional layer 103, and a second electrode layer 105, which are sequentially disposed in the light exiting direction.
  • the organic material functional layer 103 includes a light emitting region B that emits blue light, a light emitting region G that emits green light, and a light emitting region R that emits red light, and includes the first ones that are sequentially arranged.
  • the functional layer, the luminescent layer and the second functional layer includes a light emitting region B that emits blue light, a light emitting region G that emits green light, and a light emitting region R that emits red light, and includes the first ones that are sequentially arranged.
  • the functional layer, the luminescent layer and the second functional layer includes a light emitting region B that emits blue light, a light emitting
  • the pixel defining layer 104 includes a pixel region corresponding to the light emitting regions B, G, R, and a spacer region disposed between adjacent pixel regions.
  • the first function is performed except that the light-emitting layer is vapor-deposited with a fine metal mask to form portions corresponding to the light-emitting layers of the respective light-emitting regions B, G, and R, respectively.
  • the layer, the second functional layer, and the second electrode layer 105 are each formed by vapor deposition using a common mask. Therefore, portions of the first functional layer, the second functional layer, and the second electrode layer corresponding to the respective light-emitting regions B, G, R are connected together. As a result, as shown in FIG.
  • FIG. 2 illustrates a cross-sectional view of an OLED array substrate in accordance with an embodiment of the present disclosure.
  • the OLED array substrate 200 includes a substrate 201, a first electrode layer 202, a pixel defining layer, an organic material functional layer 203, and a second electrode layer 205 which are sequentially arranged in the light exiting direction.
  • the organic material functional layer 203 includes light emitting regions B, G, R that emit light of different colors.
  • the pixel definition layer includes a pixel region corresponding to the light emitting regions B, G, R, and a spacer region 204 disposed between adjacent pixel regions. Each of the spacer regions 204 is for electrically isolating adjacent light emitting regions B, G, R.
  • the pixel defining layer has a mesh structure whose mesh corresponds to the pixel area of the pixel defining layer, and the edge of the mesh corresponds to the spacing area 204.
  • the OLED array substrate proposed by the present disclosure by using an interval region electrically isolating adjacent light-emitting regions, it is possible to avoid displaying a single light-emitting region (for example, a light-emitting region G emitting green light) by lighting only a certain color.
  • a single light-emitting region for example, a light-emitting region G emitting green light
  • adjacent light-emitting regions of different colors for example, a light-emitting region B that emits blue light and a light-emitting region R that emits red light
  • the display device The display effect can be improved.
  • the organic material functional layer 203 includes a first functional layer 2031, a light emitting layer 2032, and a second functional layer 2033 which are sequentially arranged in the light exiting direction, and each of the spaced regions 204 includes a first interval which is sequentially arranged in the light emitting direction. a portion 2041 and a second spacer portion 2042.
  • the first spacers 2041 are for separating portions of the first functional layer 2031 corresponding to the respective light emitting regions from each other.
  • the first spacers 2041 further separate portions of the light emitting layer 2032 corresponding to the respective light emitting regions from each other.
  • the second functional layer 2033 corresponding to each of the light-emitting regions may be integrally formed as compared to an implementation in which portions of the first functional layer, the light-emitting layer, and the second functional layer corresponding to the respective light-emitting regions are separated from each other. Therefore, the manufacturing process of such an OLED array substrate is simpler and the cost is also lower.
  • the angle ⁇ between the side wall of the first spacer 2041 and the lower surface of the first spacer 2041 is larger than the clip of the sidewall of the second spacer 2042 and the lower surface of the second spacer 2042. Angle ⁇ .
  • the first spacer portion 2041 can be formed by making the angle ⁇ between the sidewall of the first spacer portion 2041 and the lower surface thereof larger than the angle ⁇ between the sidewall of the second spacer portion 2042 and the lower surface thereof.
  • the side wall joints of the second spacers 2042 form corners, so that portions of the first functional layer 2031 corresponding to the respective light-emitting regions separated from each other can be simultaneously formed, and thus the manufacturing process of the OLED array substrate is simpler and the cost is also lower.
  • the angle ⁇ between the sidewall of the first spacer 2041 and the lower surface of the first spacer 2041 is greater than or equal to 60°, and the sidewall of the second spacer 2042 and the lower surface of the second spacer 2042 The angle ⁇ is less than or equal to 30°.
  • the lateral etch rate of the material of the first spacer 2041 is greater than the lateral etch rate of the material of the second spacer 2042.
  • the larger the lateral etching rate the larger the angle between the sidewall formed by the material and the lower surface thereof.
  • FIG. 3 illustrates a cross-sectional view of an OLED array substrate in accordance with another embodiment of the present disclosure.
  • the OLED array substrate 300 includes a substrate 301, a first electrode layer 302, a pixel defining layer, an organic material functional layer 303, and a second electrode layer 305 which are sequentially arranged in the light exiting direction.
  • the organic material functional layer 303 includes light emitting regions B, G, R that emit light of different colors.
  • the pixel defining layer includes a pixel region corresponding to the light emitting regions B, G, R, and a spacer region 304 disposed between adjacent pixel regions. Each of the spacer regions 304 is for electrically isolating adjacent light emitting regions B, G, R.
  • the organic material functional layer 303 includes a first functional layer 3031, a light emitting layer 3032, and a second functional layer 3033 which are sequentially disposed in the light exiting direction, and each of the spaced regions 304 includes a first interval which is sequentially arranged in the light emitting direction. a portion 3041 and a second spacer portion 3042.
  • the first spacer portion 3041 is for making a portion of the first functional layer 3031 corresponding to each of the light emitting regions Separated from each other.
  • the first spacers 3041 further separate portions of the light-emitting layers 3032 corresponding to the respective light-emitting regions from each other.
  • the width of the upper surface of the first spacer portion 3041 is less than or equal to the width of the lower surface of the second spacer portion 3042.
  • the width of the upper surface of the first spacer portion 3041 smaller than or equal to the width of the lower surface of the second spacer portion 3042, at the interface between the first spacer portion 3041 and the second spacer portion 3042
  • the notches are formed such that portions of at least the first functional layer 3031 corresponding to the respective light-emitting regions separated from each other can be simultaneously formed, and thus the manufacturing process of the OLED array substrate is simpler and less expensive.
  • the sidewalls of the first spacer portion 3041 and the first portion may be greater than, less than, or even equal to the angle ⁇ between the sidewall of the second spacer 3042 and the lower surface of the second spacer 3042.
  • the thickness of the first spacers 2041, 3041 is greater than the thickness of the first functional layers 2031, 3031.
  • first spacer and the second spacer are schematically illustrated as a positive trapezoid in each of the figures, in an alternative embodiment, the first spacer and the second spacer may take any suitable shape.
  • first spacer and/or the second spacer may be rectangular, inverted trapezoidal or the like.
  • the first functional layer may be composed of at least one of a hole injection layer, a hole transport layer, and an electron blocking layer
  • the second functional layer may be composed of a hole blocking layer, an electron transport layer, and an electron injection layer.
  • At least one of the components, and the first electrode layer is an anode layer and the second electrode layer is a cathode layer.
  • the first electrode layer may be a reflective electrode layer
  • the second electrode layer may be a transparent electrode layer
  • the light emitting layer may include an organic light emitting layer and an optical compensation layer disposed between the organic light emitting layer and the first functional layer.
  • Optical compensation layer for adjusting organic material work
  • the effective optical cavity length in the energy layer is such that light of different colors exits at the maximum intensity in the functional layer of the organic material.
  • the present disclosure also provides an OLED display panel comprising any of the above OLED array substrates.
  • the present disclosure provides a method of fabricating an OLED array substrate.
  • the method includes sequentially forming a first electrode layer, a pixel defining layer, an organic material functional layer, and a second electrode layer.
  • the organic material functional layer includes a light emitting region that emits light of different colors.
  • the pixel definition layer includes a pixel region corresponding to the light emitting region, and a spacer region disposed between the adjacent pixel regions. Each of the spacer regions is used to electrically isolate adjacent light emitting regions.
  • forming the functional layer of the organic material may include sequentially forming the first functional layer, the light emitting layer, and the second functional layer.
  • Each of the spaced regions includes a first spacer and a second spacer that are sequentially disposed in the light exiting direction.
  • the first spacer is for separating portions of at least the first functional layer corresponding to the respective light emitting regions from each other.
  • the first spacer portion and the second spacer portion may be formed in the same layer.
  • the first spacer and the second spacer may be formed in layers.

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  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
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  • Electromagnetism (AREA)
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  • Electroluminescent Light Sources (AREA)

Abstract

提供一种OLED阵列基板及其制作方法、OLED显示面板。OLED阵列基板（200）包括沿出光方向依次布置的第一电极层（202）、像素定义层、有机材料功能层（203）和第二电极层（205）。有机材料功能层（203）包括发射不同颜色的光的发光区域（B、G、R）。像素定义层包括与发光区域（B、G、R）对应的像素区域，和布置在相邻像素区域之间的间隔区域（204）。每一个间隔区域（204）用于电气隔离相邻的发光区域（B、G、R）。

Description

OLED阵列基板及其制作方法、OLED显示面板
相关申请
本申请要求享有2016年7月29日提交的中国专利申请No.201610609987.6的优先权，其全部公开内容通过引用并入本文。
技术领域
本公开一般涉及显示领域，并且更特别地涉及一种有机发光二极管(OLED)阵列基板、包括这样的OLED阵列基板的OLED显示面板，以及这样的OLED阵列基板的制作方法。
背景技术
有机发光二极管(OLED)显示技术是一种利用有机半导体材料在电流的驱动下产生的可逆变色来实现显示的技术。OLED显示器具有超轻、超薄、高亮度、大视角、低电压、低功耗、快响应、高清晰度、抗震、可弯曲、低成本、工艺简单、使用原材料少、发光效率高和温度范围宽等优点，被认为是最有发展前景的新一代显示技术。
发明内容
本公开的一个目的是提供一种改进的OLED阵列基板、包括这样的OLED阵列基板的OLED显示面板，以及这样的OLED阵列基板的制作方法。
根据本公开的一个方面，提供了一种OLED阵列基板。OLED阵列基板包括沿出光方向依次布置的第一电极层、像素定义层、有机材料功能层和第二电极层。有机材料功能层包括发射不同颜色的光的发光区域。像素定义层包括与发光区域对应的像素区域，和布置在相邻像素区域之间的间隔区域。每一个间隔区域用于电气隔离相邻的发光区域。
在本公开所提出的OLED阵列基板中，通过采用电气隔离相邻的发光区域的间隔区域，可以避免在通过点亮仅某种颜色的发光区域从而显示单色图像时，相邻的不同颜色的发光区域也被微弱地点亮，进而造成显示异常，因此，显示装置的显示效果能够得以改善。
在一些实施例中，有机材料功能层包括沿出光方向依次布置的第一功能层、发光层和第二功能层，并且每一个间隔区域包括沿出光方向依次布置的第一间隔部和第二间隔部。第一间隔部用于使对应于各个发光区域的至少第一功能层的部分彼此分离。
在这样的OLED阵列基板中，只需要使对应于各个发光区域的第一功能层的部分彼此分离，就可以保证相邻的发光区域电气隔离。因此，相比于使对应于各个发光区域的第一功能层、发光层和第二功能层的部分均彼此分离的实现方式而言，可以一体地形成对应于各个发光区域的第二功能层，因此，这样的OLED阵列基板的制造工艺更加简单，成本也更加低廉。
在一些实施例中，第一间隔部的侧壁与第一间隔部的下表面的夹角大于第二间隔部的侧壁与第二间隔部的下表面的夹角。
在这样的OLED阵列基板中，通过使第一间隔部的侧壁与其下表面的夹角大于第二间隔部的侧壁与其下表面的夹角，可以在第一间隔部与第二间隔部的侧壁连结处形成拐角，从而使得彼此分离的对应于各个发光区域的至少第一功能层的部分可以同时形成，因此OLED阵列基板的制造工艺更加简单，成本也更加低廉。
在一些实施例中，第一间隔部的侧壁与第一间隔部的下表面的夹角大于或等于60°，并且第二间隔部的侧壁与第二间隔部的下表面的夹角小于或等于30°。
在一些实施例中，第一间隔部的材料的横向蚀刻速率大于第二间隔部的材料的横向蚀刻速率。在相同蚀刻条件下，横向蚀刻速率越大的材料所形成的侧壁与其下表面的夹角越大。
在一些实施例中，第一间隔部的上表面的宽度小于或等于第二间隔部的下表面的宽度。
在这样的OLED阵列基板中，通过使第一间隔部的上表面的宽度小于或等于第二间隔部的下表面的宽度，可以在第一间隔部与第二间隔部的界面处形成凹口，从而使得彼此分离的对应于各个发光区域的至少第一功能层的部分可以同时形成，因此OLED阵列基板的制造工艺更加简单，成本也更加低廉。
在一些实施例中，第一间隔部的厚度大于第一功能层的厚度。
在这样的OLED阵列基板中，通过使第一间隔部的厚度大于第一 功能层的厚度，可以在第一间隔部之间同时形成彼此分离的对应于各个发光区域的第一功能层的部分，因此OLED阵列基板的制造工艺更加简单，成本也更加低廉。
在一些实施例中，第一功能层由空穴注入层、空穴传输层和电子阻挡层中的至少一个构成，第二功能层由空穴阻挡层、电子传输层、电子注入层中的至少一个构成，并且第一电极层为阳极层，第二电极层为阴极层。
在一些实施例中，发光层包括有机发光层和布置在有机发光层与第一功能层之间的光学补偿层。光学补偿层用于调节有机材料功能层中的有效光学腔长，以便使不同颜色的光在有机材料功能层中以最大的光强出射。
在一些实施例中，第一电极层为反射电极层，并且第二电极层为透明电极层。
根据本公开的另一方面，提供了一种OLED显示面板，包括上述任一种OLED阵列基板。
根据本公开的又一方面，提供了一种OLED阵列基板的制作方法。该方法包括依次形成第一电极层、像素定义层、有机材料功能层和第二电极层。有机材料功能层包括发射不同颜色的光的发光区域。像素定义层包括与发光区域对应的像素区域，和布置在相邻像素区域之间的间隔区域。每一个间隔区域用于电气隔离相邻的发光区域。
在一些实施例中，形成有机材料功能层包括依次形成第一功能层、发光层和第二功能层。每一个间隔区域包括沿出光方向依次布置的第一间隔部和第二间隔部。第一间隔部用于使对应于各个发光区域的至少第一功能层的部分彼此分离。
应当指出的是，本公开的所有方面具有类似或相同的示例实现和益处，在此不再赘述。
本公开的这些和其它方面将从以下描述的实施例显而易见并且将参照以下描述的实施例加以阐述。
附图说明
图1示意性地图示了根据现有技术的OLED阵列基板的截面图。
图2示意性地图示了根据本公开的实施例的OLED阵列基板的截 面图。
图3示意性地图示了根据本公开的实施例的OLED阵列基板的截面图。
具体实施方式
以下将结合附图详细描述本公开的示例性实施例。附图是示意性的，并未按比例绘制，且只是为了说明本公开的实施例而并不意图限制本公开的保护范围。在附图中，相同的附图标记表示相同或相似的部分。为了使本公开的技术方案更加清楚，本领域熟知的工艺步骤及器件结构在此省略。
下面，参照附图通过举例的方式来说明根据本公开实施例的触摸面板、显示装置以及触摸面板的制造方法的具体实例。附图是示意性的，并未按比例绘制，且只是为了说明本公开的实施例而并不意图限制本公开的保护范围。
为便于描述，此处可以使用诸如“在...之下”、“在...下面”、“下”、“在...之上”、“上”等等空间相对性术语以描述如图所示的一个元件或部件与另一个元件或部件之间的关系。应当理解，空间相对性术语是用来概括除附图所示取向之外的使用或操作中的器件的不同取向的。例如，如果附图中的器件翻转过来，被描述为“在”其他元件或部件“之下”或“下面”的元件将会在其他元件或部件的“上方”。这样，示例性术语“在...下面”就能够涵盖之上和之下两种取向。器件可以采取其他取向(旋转90度或在其他取向)，此处所用的空间相对性描述符做相应解释。
在下文中，以包括红色(R)发光区域、蓝色(B)发光区域和绿色(G)发光区域的RGB像素为例来说明本公开。然而，如本领域技术人员将领会到的，本公开不限于RGB像素结构，而是可以等同地适用于包括其它数目和类型的发光区域的像素结构。
图1示意性地图示了根据现有技术的OLED阵列基板的截面图。如图1所示，OLED阵列基板100包括沿出光方向依次布置的衬底101、第一电极层102、像素定义层104、有机材料功能层103和第二电极层105。有机材料功能层103包括发射蓝色光的发光区域B、发射绿色光的发光区域G和发射红色光的发光区域R，并且包括依次布置的第一 功能层、发光层和第二功能层。像素定义层104包括与发光区域B、G、R对应的像素区域，和布置在相邻像素区域之间的间隔区域。在图1所示的现有技术OLED阵列基板中，除发光层采用精细金属掩膜板进行蒸镀而分别形成对应于各个发光区域B、G、R的发光层的部分之外，第一功能层、第二功能层以及第二电极层105均使用公共掩膜板进行蒸镀而形成。因此，对应于各个发光区域B、G、R的第一功能层、第二功能层和第二电极层的部分均连接在一起。结果，如图1所示，在OLED阵列基板中，既存在垂直于OLED阵列基板的纵向电流，也存在平行于OLED阵列基板的横向电流。该横向电流导致在显示单色画面时，其它另外两色的发光区域也会被微弱地点亮，进而造成显示异常。
图2图示了根据本公开的实施例的OLED阵列基板的截面图。如图2所示，OLED阵列基板200包括沿出光方向依次布置的衬底201、第一电极层202、像素定义层、有机材料功能层203和第二电极层205。有机材料功能层203包括发射不同颜色的光的发光区域B、G、R。像素定义层包括与发光区域B、G、R对应的像素区域，和布置在相邻像素区域之间的间隔区域204。每一个间隔区域204用于电气隔离相邻的发光区域B、G、R。
应当指出的是，像素定义层具有网状结构，该网状结构的网眼对应于像素定义层的像素区域，而网眼的边缘对应于间隔区域204。
在本公开所提出的OLED阵列基板中，通过采用电气隔离相邻的发光区域的间隔区域，可以避免在通过点亮仅某种颜色的发光区域(例如发射绿色光的发光区域G)从而显示单色(例如绿色)图像时，相邻的不同颜色的发光区域(例如发射蓝色光的发光区域B和发射红色光的发光区域R)也被微弱地点亮，进而造成显示异常，因此，显示装置的显示效果能够得以改善。
如图2所示，有机材料功能层203包括沿出光方向依次布置的第一功能层2031、发光层2032和第二功能层2033，并且每一个间隔区域204包括沿出光方向依次布置的第一间隔部2041和第二间隔部2042。第一间隔部2041用于使对应于各个发光区域的第一功能层2031的部分彼此分离。可选地，第一间隔部2041还使对应于各个发光区域的发光层2032的部分彼此分离。
在这样的OLED阵列基板中，只需要使对应于各个发光区域的第一功能层的部分彼此分离，就可以保证相邻的发光区域电气隔离。因此，相比于使对应于各个发光区域的第一功能层、发光层和第二功能层的部分均彼此分离的实现方式而言，可以一体地形成对应于各个发光区域的第二功能层2033，因此，这样的OLED阵列基板的制造工艺更加简单，成本也更加低廉。
如图2示意性示出的，第一间隔部2041的侧壁与第一间隔部2041的下表面的夹角α大于第二间隔部2042的侧壁与第二间隔部2042的下表面的夹角β。
在这样的OLED阵列基板中，通过使第一间隔部2041的侧壁与其下表面的夹角α大于第二间隔部2042的侧壁与其下表面的夹角β，可以在第一间隔部2041与第二间隔部2042的侧壁连结处形成拐角，从而使得彼此分离的对应于各个发光区域的第一功能层2031的部分可以同时形成，因此OLED阵列基板的制造工艺更加简单，成本也更加低廉。
可选地，第一间隔部2041的侧壁与第一间隔部2041的下表面的夹角α大于或等于60°，并且第二间隔部2042的侧壁与第二间隔部2042的下表面的夹角β小于或等于30°。
可选地，第一间隔部2041的材料的横向蚀刻速率大于第二间隔部2042的材料的横向蚀刻速率。在相同蚀刻条件下，横向蚀刻速率越大的材料所形成的侧壁与其下表面的夹角越大。
图3图示了根据本公开的另一实施例的OLED阵列基板的截面图。OLED阵列基板300包括沿出光方向依次布置的衬底301、第一电极层302、像素定义层、有机材料功能层303和第二电极层305。有机材料功能层303包括发射不同颜色的光的发光区域B、G、R。像素定义层包括与发光区域B、G、R对应的像素区域，和布置在相邻像素区域之间的间隔区域304。每一个间隔区域304用于电气隔离相邻的发光区域B、G、R。
如图3所示，有机材料功能层303包括沿出光方向依次布置的第一功能层3031、发光层3032和第二功能层3033，并且每一个间隔区域304包括沿出光方向依次布置的第一间隔部3041和第二间隔部3042。第一间隔部3041用于使对应于各个发光区域的第一功能层3031的部 分彼此分离。可选地，第一间隔部3041还使对应于各个发光区域的发光层3032的部分彼此分离。与图2所示的OLED阵列基板200不同的是，在OLED阵列基板300中，第一间隔部3041的上表面的宽度小于或等于第二间隔部3042的下表面的宽度。
在这样的OLED阵列基板中，通过使第一间隔部3041的上表面的宽度小于或等于第二间隔部3042的下表面的宽度，可以在第一间隔部3041与第二间隔部3042的界面处形成凹口，从而使得彼此分离的对应于各个发光区域的至少第一功能层3031的部分可以同时形成，因此OLED阵列基板的制造工艺更加简单，成本也更加低廉。
在OLED阵列基板300中，由于在第一间隔部3041与第二间隔部3042的界面处形成的凹口保证第一功能层3031的各部分彼此分离，因此第一间隔部3041的侧壁与第一间隔部3041的下表面的夹角α可以大于、小于、甚至等于第二间隔部3042的侧壁与第二间隔部3042的下表面的夹角β。
可选地，如图2和图3所示，第一间隔部2041，3041的厚度大于第一功能层2031，3031的厚度。
在这样的OLED阵列基板中，通过使第一间隔部的厚度大于第一功能层的厚度，可以在第一间隔部之间同时形成彼此分离的对应于各个发光区域的第一功能层的部分，因此OLED阵列基板的制造工艺更加简单，成本也更加低廉。
应当指出的是，尽管在各图中将第一间隔部和第二间隔部示意性地图示为正梯形，但是在可替换的实施例中，第一间隔部和第二间隔部可以采取任何合适的形状。例如，第一间隔部和/或第二间隔部可以是矩形、倒梯形等。
在上述实施例中，第一功能层可以由空穴注入层、空穴传输层和电子阻挡层中的至少一个构成，第二功能层可以由空穴阻挡层、电子传输层、电子注入层中的至少一个构成，并且第一电极层为阳极层，第二电极层为阴极层。
在上述实施例中，第一电极层可以为反射电极层，并且第二电极层可以为透明电极层。
在上述实施例中，发光层可以包括有机发光层和布置在有机发光层与第一功能层之间的光学补偿层。光学补偿层用于调节有机材料功 能层中的有效光学腔长，以便使不同颜色的光在有机材料功能层中以最大的光强出射。
本公开还提供了一种OLED显示面板，包括上述任一种OLED阵列基板。
另外，本公开提供了一种OLED阵列基板的制作方法。该方法包括依次形成第一电极层、像素定义层、有机材料功能层和第二电极层。有机材料功能层包括发射不同颜色的光的发光区域。像素定义层包括与发光区域对应的像素区域，和布置在相邻像素区域之间的间隔区域。每一个间隔区域用于电气隔离相邻的发光区域。
在上述制造方法中，形成有机材料功能层可以包括依次形成第一功能层、发光层和第二功能层。每一个间隔区域包括沿出光方向依次布置的第一间隔部和第二间隔部。第一间隔部用于使对应于各个发光区域的至少第一功能层的部分彼此分离。
在这样的制造方法中，第一间隔部和第二间隔部可以同层形成。可替换地，第一间隔部和第二间隔部可以分层形成。
本公开的概念可以广泛应用于任何具有显示功能的***，包括台式计算机、膝上型计算机、移动电话、平板电脑等。另外，尽管上文已经详细描述了几个实施例，但是其它修改是可能的。例如，可以将组件添加到所描述的***或者从所描述的***移除。其它实施例可以在本公开的范围内。本领域技术人员鉴于本公开的教导，可以实现众多变型和修改而不脱离于本公开的精神和范围。

Claims (15)

  1. 一种OLED阵列基板，包括沿出光方向依次布置的第一电极层、像素定义层、有机材料功能层和第二电极层，
    其中，
    有机材料功能层包括发射不同颜色的光的发光区域，
    像素定义层包括与发光区域对应的像素区域，和布置在相邻像素区域之间的间隔区域，并且每一个间隔区域用于电气隔离相邻的发光区域。
  2. 根据权利要求1所述的阵列基板，其中有机材料功能层包括沿出光方向依次布置的第一功能层、发光层和第二功能层，并且每一个间隔区域包括沿出光方向依次布置的第一间隔部和第二间隔部，所述第一间隔部用于使对应于各个发光区域的至少第一功能层的部分彼此分离。
  3. 根据权利要求2所述的阵列基板，其中第一间隔部的侧壁与第一间隔部的下表面的夹角大于第二间隔部的侧壁与第二间隔部的下表面的夹角。
  4. 根据权利要求3所述的阵列基板，其中第一间隔部的侧壁与第一间隔部的下表面的夹角大于或等于60°，并且第二间隔部的侧壁与第二间隔部的下表面的夹角小于或等于30°。
  5. 根据权利要求3所述的阵列基板，其中第一间隔部的材料的横向蚀刻速率大于第二间隔部的材料的横向蚀刻速率。
  6. 根据权利要求2所述的阵列基板，其中第一间隔部的上表面的宽度小于或等于第二间隔部的下表面的宽度。
  7. 根据权利要求2所述的阵列基板，其中第一间隔部的厚度大于第一功能层的厚度。
  8. 根据权利要求2所述的阵列基板，其中第一功能层由空穴注入层、空穴传输层和电子阻挡层中的至少一个构成，第二功能层由空穴阻挡层、电子传输层、电子注入层中的至少一个构成，并且第一电极层为阳极层，第二电极层为阴极层。
  9. 根据权利要求2所述的阵列基板，其中发光层包括有机发光层和布置在有机发光层与第一功能层之间的光学补偿层。
  10. 根据权利要求1所述的阵列基板，其中第一电极层为反射电极层，并且第二电极层为透明电极层。
  11. 一种OLED显示面板，包括根据权利要求1-10中任一项所述的OLED阵列基板。
  12. 一种OLED阵列基板的制作方法，包括：
    依次形成第一电极层、像素定义层、有机材料功能层和第二电极层，
    其中，
    有机材料功能层包括发射不同颜色的光的发光区域，
    像素定义层包括与发光区域对应的像素区域，和布置在相邻像素区域之间的间隔区域，并且每一个间隔区域用于电气隔离相邻的发光区域。
  13. 根据权利要求12所述的制作方法，其中形成有机材料功能层包括依次形成第一功能层、发光层和第二功能层，并且每一个间隔区域包括沿出光方向依次布置的第一间隔部和第二间隔部，所述第一间隔部用于使对应于各个发光区域的至少第一功能层的部分彼此分离。
  14. 根据权利要求13所述的制作方法，其中所述第一间隔部和所述第二间隔部同层形成。
  15. 根据权利要求13所述的制作方法，其中所述第一间隔部和所述第二间隔部分层形成。
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