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 PDFInfo
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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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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 80
- 239000010410 layer Substances 0.000 claims description 93
- 238000000034 method Methods 0.000 claims description 32
- 238000000059 patterning Methods 0.000 claims description 26
- 239000012044 organic layer Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000005401 electroluminescence Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
- H10K50/813—Anodes characterised by their shape
-
- 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
- H10K50/822—Cathodes characterised by their shape
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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
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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
- H10K71/10—Deposition of organic active material
- H10K71/16—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
- H10K71/166—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering using selective deposition, e.g. using a mask
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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
- H10K71/621—Providing a shape to conductive layers, e.g. patterning or selective deposition
Definitions
- 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
Description
Claims (10)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
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US20060172455A1 (en) * | 2005-02-03 | 2006-08-03 | Eastman Kodak Company | Making multicolor OLED displays |
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