WO2020172997A1 - 一种oled显示面板及其制备方法 - Google Patents
一种oled显示面板及其制备方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000004132 cross linking Methods 0.000 claims abstract description 39
- 150000001875 compounds Chemical class 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 10
- 230000005525 hole transport Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 17
- 239000003960 organic solvent Substances 0.000 claims description 11
- 239000011259 mixed solution Substances 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 9
- 238000005538 encapsulation Methods 0.000 claims description 8
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 7
- 125000003118 aryl group Chemical group 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 125000001424 substituent group Chemical group 0.000 claims description 6
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 claims description 5
- 125000005581 pyrene group Chemical group 0.000 claims description 5
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical group C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 4
- 238000007639 printing Methods 0.000 claims description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 72
- 238000007641 inkjet printing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 2
- ASJCVVGLGXVRGQ-UHFFFAOYSA-N 1-butyl-2-methoxybenzene Chemical compound CCCCC1=CC=CC=C1OC ASJCVVGLGXVRGQ-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003759 ester based solvent Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- -1 small molecule compounds Chemical class 0.000 description 1
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Classifications
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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]
- H10K50/14—Carrier transporting layers
- H10K50/16—Electron transporting layers
Definitions
- the invention relates to the field of display technology, in particular to an OLED display panel and a preparation method thereof.
- OLED devices contain multi-layer structures: light-emitting layer, electron transport layer, hole transport layer, etc.
- adjacent functional layers are likely to be mutually dissolved, which leads to the process of making the upper film layer. Destroy the lower film that has been made.
- An OLED display panel includes a display device panel, a light emitting device layer and an encapsulation layer.
- the light emitting device layer includes a cathode, a light emitting layer, a hole transport layer and an anode; wherein the light emitting device layer also includes An electron transport layer between the electron transport layer and the light-emitting layer, and the material of the electron transport layer includes a crosslinking compound.
- the general structural formula of the cross-linking compound is: , Where Ar is an aromatic group, R 1 is a bridging group, R 2 is a substituent group, and R 3 is a crosslinking group.
- the Ar is a pyrene group or a perylene group.
- R 1 is a triazine substituent group or a pyridine substituent group.
- R 2 is a short carbon chain alkyl group or tert-butyl group.
- R 3 is a p-styryl group.
- the present invention also provides a method for manufacturing an OLED display panel, including the following steps:
- step S30 includes:
- the additives include a surface tension regulator and a viscosity regulator.
- the general structural formula of the cross-linking compound is: , Where Ar is an aromatic group, R 1 is a bridging group, R 2 is a substituent group, and R 3 is a crosslinking group.
- the Ar is a pyrene group or a perylene group.
- the in-situ reaction method is used to prepare a uniform and stable electron transport layer, which can effectively improve the interface properties of the light-emitting device layer formed by inkjet printing and further improve the performance of the OLED display panel.
- the method is simple in preparation method and easy to control. , High stability.
- FIG. 1 is a schematic structural diagram of an OLED display panel in a specific embodiment of the present invention.
- FIG. 2 is a schematic diagram of the preparation steps of an OLED display panel in a specific embodiment of the present invention.
- 3 to 5 are schematic diagrams of the manufacturing process of the OLED display panel in specific embodiments of the present invention.
- Display device panel 20. Light emitting device layer; 21. Cathode; 22. Electron transport layer; 23. Light emitting layer; 24. Hole transport layer; 25. Anode; 30. Encapsulation layer; 40. Sub-pixel opening.
- the present invention aims at the fact that in the process of manufacturing the upper film layer in the existing OLED display panel, the lower film layer that has been manufactured is easily damaged.
- the present invention can solve the above-mentioned problems.
- An OLED display panel as shown in FIG. 1, includes a display device panel 10, a light emitting device layer 20 and an encapsulation layer 30.
- the light emitting device layer 20 includes a cathode 21, a light emitting layer 23, a hole transport layer 24 and an anode 25.
- the light-emitting device layer 20 further includes an electron transport layer 22 disposed between the cathode 21 and the light-emitting layer 23, and the electron transport layer 22 is made of a cross-linking compound.
- the cross-linking compound is used to form the electron transport layer 22 to prevent the mutual dissolution between the functional film layers, and to avoid damaging the underlying film layer during the production of the light-emitting layer 23.
- the electron transport layer 22 is formed by inkjet printing, and the ink is made by the cross-linking compound , Can effectively improve the interface properties of the light emitting device layer 20 formed by inkjet printing, and further improve the performance of the light emitting device layer 20.
- the general structural formula of the cross-linking compound is: , Where Ar is an aromatic group, R 1 is a bridging group, R 2 is a substituent group, and R 3 is a crosslinking group.
- the Ar is a pyrene group or a perylene group, provides a molecular skeleton, and has the function of electron transport.
- the R 1 is a triazine substituted group or a pyridine substituted group, which has a strong electron transport ability and at the same time adjusts the energy level of the molecule.
- the R 2 is a short carbon chain alkyl group or a tert-butyl group, and its main function is to enhance the flexibility of the molecule and further improve the solubility and film-forming properties of the molecule.
- the R 3 is a p-styrene group, which can undergo a cross-linking reaction under heating or UV irradiation conditions to form a uniform and stable film.
- the chemical structure of the cross-linking compound is:
- the present invention also provides a manufacturing method of the OLED display panel, as shown in FIG. 2, including the following steps:
- the step S30 includes:
- the in-situ reaction method is used to prepare a uniform and stable electron transport layer 22, which can effectively improve the interface properties of the light-emitting device layer 20 formed by inkjet printing, and further improve the performance of the OLED display panel.
- the method is simple and the process Easy to control and high stability.
- the general structural formula of the cross-linking compound is: , Where Ar is an aromatic group, R 1 is a bridging group, R 2 is a substituent group, and R 3 is a crosslinking group.
- the Ar is a pyrene group or a perylene group, provides a molecular skeleton, and has the function of electron transport.
- the R 1 is a triazine substituted group or a pyridine substituted group, which has a strong electron transport ability and at the same time adjusts the energy level of the molecule.
- the R 2 is a short carbon chain alkyl group or a tert-butyl group, and its main function is to enhance the flexibility of the molecule and further improve the solubility and film-forming properties of the molecule.
- the R 3 is a p-styrene group, which can undergo a cross-linking reaction under heating or UV irradiation conditions to form a uniform and stable film.
- the chemical structure of the cross-linking compound is:
- the organic solvent may be one or a mixture of aromatic hydrocarbons, ethers, and ester solvents.
- the organic solvent is a mixed solvent of tetralin and butyl anisole.
- the additives include a surface tension regulator and a viscosity regulator.
- the surface tension modifier is one or more of small molecule compounds.
- the surface tension modifier is one or more of imidazole and its derivatives, phenol and hydroquinone mixing.
- the viscosity adjusting agent is one or more of alcohol, ether, ester, phenol and amine, used to adjust the viscosity of the system.
- FIGS. 3 to 5 are schematic diagrams of the manufacturing process of the OLED display panel.
- a cathode 21 is formed in the sub-pixel opening 40 of the display device panel 10.
- the prepared mixed solution is printed on the cathode 21, it is vacuum dried to form a film, and heat-treated in air to obtain the electron transport layer 22.
- a light emitting layer 23, a hole transport layer 24, and an anode 25 are sequentially formed on the electron transport layer 22 to form the light emitting device layer 20, and then an encapsulation layer 30 is formed on the display device panel 10. , In order to protect the light emitting device layer 20.
- the beneficial effects of the present invention are: using an in-situ reaction method to prepare a uniform and stable electron transport layer 22, which can effectively improve the interface properties of the light-emitting device layer 20 formed by inkjet printing, and further improve the performance of the OLED display panel.
- the preparation method is simple, the process is easy to control, and the stability is high.
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- Electroluminescent Light Sources (AREA)
Abstract
一种OLED显示面板,包括显示器件板(10)、发光器件层(20)以及封装层(30),所述发光器件层(20)包括阴极(21)、发光层(23)、空穴传输层(24)以及阳极(25);其中,所述发光器件层(20)还包括设置在所述阴极(21)与发光层(23)之间的电子传输层(22),所述电子传输层(22)的制成材料包含交联化合物。
Description
本发明涉及显示技术领域,尤其涉及一种OLED显示面板及其制备方法。
溶液制程OLED发光器件,特别是喷墨打印OLED发光器件,由于上述方法在大面积面板制备过程中拥有低成本、无需金属掩模版和高的材料利用率的优势,已经受到越来越多的关注。
OLED器件中包含有多层结构:发光层、电子传输层和空穴传输层等,制作不同膜层时,相邻的功能层之间容易产生互溶,从而导致制作上层膜层的过程中,容易破坏已制作的下层膜层。
制作上层膜层的过程中,容易破坏已制作的下层膜层。
一种OLED显示面板,包括显示器件板、发光器件层以及封装层,所述发光器件层包括阴极、发光层、空穴传输 层以及阳极;其中,所述发光器件层还包括设置在所述阴极与发光层之间的电子传输层,所述电子传输层的制成材料包含交联化合物。
进一步的,所述Ar为芘基团或苝基团。
进一步的,所述R
1为三嗪取代基团或吡啶取代基团。
进一步的,所述R
2为短碳链的烷基基团或叔丁基基团。
进一步的,所述R
3为对苯乙烯基基团。
本发明还提供一种OLED显示面板的制备方法,包括以下步骤:
S10、提供一显示器件板;
S20、在所述显示器件板的子像素开口中形成阴极;
S30、使用含交联化合物的混合溶液在所述阴极上形成电子传输层;
S40、在所述电子传输层上依次制成发光层、空穴传输层和阳极,以形成发光器件层;
S50、在所述显示器件板上形成封装层。
进一步的,所述步骤S30包括:
S31、将所述交联化合物加入到有机溶剂中,搅拌使交联化合物充分溶解;
S32、向含交联化合物的有机溶剂中加入添加剂,进行搅拌使添加剂与有机溶剂混合均匀,以形成含交联化合物的混合溶液;
S33、将含交联化合物的混合溶液打印至所述阴极上,并进行真空干燥,以形成交联的电子传输层材料;
S34、对所述电子传输层材料进行热处理,形成电子传输层。
进一步的,所述添加剂包括表面张力调节剂和黏度调节剂。
进一步的,所述Ar为芘基团或苝基团。
利用原位反应的方法,制备得到均一稳定的电子传输层,能够有效地改善喷墨打印形成的发光器件层的界面性质,进一步提升OLED显示面板的性能,同时该方法制备方法简单,过程易于控制,稳定性高。
为了更清楚地说明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单介绍,显而易见地,下面描述中的附图仅仅是发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明具体实施方式中OLED显示面板的结构示意图;
图2为本发明具体实施方式中OLED显示面板的制备步骤示意图;
图3至图5为本发明具体实施方式中OLED显示面板的制备流程示意图。
附图标记:
10、显示器件板;20、发光器件层;21、阴极;22、电子传输层;23、发光层;24、空穴传输层;25、阳极;30、封装层;40、子像素开口。
以下各实施例的说明是参考附加的图示,用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语,例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、 [侧面]等,仅是参考附加图式的方向。因此,使用的方向用语是用以说明及理解本发明,而非用以限制本发明。在图中,结构相似的单元是用以相同标号表示。
本发明针对现有的OLED显示面板中,制作上层膜层的过程中,容易破坏已制作的下层膜层。本发明可以解决上述问题。
一种OLED显示面板,如图1所示,包括显示器件板10、发光器件层20以及封装层30,所述发光器件层20包括阴极21、发光层23、空穴传输层24以及阳极25。
其中,所述发光器件层20还包括设置在所述阴极21与发光层23之间的电子传输层22,所述电子传输层22的制成材料包含交联化合物。
利用交联化合物形成电子传输层22,防止功能膜层之间的互溶,避免制作发光层23的过程中破坏下层膜层,同时通过喷墨打印形成电子传输层22,通过交联化合物制成墨水,能够有效地改善喷墨打印形成的发光器件层20的界面性质,进一步提升发光器件层20的性能。
其中,所述Ar为芘基团或苝基团,提供分子骨架,并具有电子传输的功能。
所述R
1为三嗪取代基团或吡啶取代基团,具有较强的电子传输能力,同时调节分子的能级。
所述R
2为短碳链的烷基基团或叔丁基基团,主要功能是增强分子的柔性,进一步改善分子的溶解性和成膜性。
所述R
3为对苯乙烯基基团,在加热或是UV辐照条件下可以发生交联反应,形成均一稳定的薄膜。
在一实施方式中,所述交联化合物的化学结构为:
根据上述OLED显示面板,本发明还提供一种OLED显示面板的制备方法,如图2所示,包括以下步骤:
S10、提供一显示器件板10;
S20、在所述显示器件板10的子像素开口40中形成阴极21;
S30、使用含交联化合物的混合溶液在所述阴极21上形成电子传输层22;
S40、在所述电子传输层22上依次制成发光层23、空穴传输层24和阳极25,以形成发光器件层20;
S50、在所述显示器件板10上形成封装层30。
具体的,所述步骤S30包括:
S31、将所述交联化合物加入到有机溶剂中,搅拌使交联化合物充分溶解;
S32、向含交联化合物的有机溶剂中加入添加剂,进行搅拌使添加剂与有机溶剂混合均匀,以形成含交联化合物的混合溶液;
S33、将含交联化合物的混合溶液打印至所述阴极21上,并进行真空干燥,以形成交联的电子传输层材料;
S34、对所述电子传输层材料进行热处理,形成电子传输层22。
利用原位反应的方法,制备得到均一稳定的电子传输层22,能够有效地改善喷墨打印形成的发光器件层20的界面性质,进一步提升OLED显示面板的性能,同时该方法制备方法简单,过程易于控制,稳定性高。
其中,所述Ar为芘基团或苝基团,提供分子骨架,并具有电子传输的功能。
所述R
1为三嗪取代基团或吡啶取代基团,具有较强的电子传输能力,同时调节分子的能级。
所述R
2为短碳链的烷基基团或叔丁基基团,主要功能是增强分子的柔性,进一步改善分子的溶解性和成膜性。
所述R
3为对苯乙烯基基团,在加热或是UV辐照条件下可以发生交联反应,形成均一稳定的薄膜。
在一实施方式中,所述交联化合物的化学结构为:
具体的,有机溶剂可以是芳香烃类、醚类以及酯类溶剂中的一种或多种混合。
进一步的,有机溶剂为四氢萘和丁基苯甲醚的混合溶剂。
具体的,所述添加剂包括表面张力调节剂和黏度调节剂。
其中,所述表面张力调节剂为小分子化合物中的一种或多种,在一实施方式中,表面张力调节剂为咪唑及其衍生物、苯酚以及对苯二酚中的一种或多种混合。
所述黏度调节剂为醇、醚、酯、酚以及胺中的一种或多种,用以调节体系的黏度。
参见图3至图5,图3至图5为所述OLED显示面板的制备流程示意图。
如图3所示,在所述显示器件板10的子像素开口40中形成阴极21。
如图4所示,将调制好的混合溶液打印至阴极21上后,真空干燥成膜,并在空气中热处理获得电子传输层22。
如图5所示,在所述电子传输层22上依次制成发光层23、空穴传输层24和阳极25,以形成发光器件层20后,在所述显示器件板10上形成封装层30,以对发光器件层20进行保护。
本发明的有益效果为:利用原位反应的方法,制备得到均一稳定的电子传输层22,能够有效地改善喷墨打印形成的发光器件层20的界面性质,进一步提升OLED显示面板的性能,同时该方法制备方法简单,过程易于控制,稳定性高。
综上所述,虽然本发明已以优选实施例揭露如上,但上述优选实施例并非用以限制本发明,本领域的普通技术人员,在不脱离本发明的精神和范围内,均可作各种更动与润饰,因此本发明的保护范围以权利要求界定的范围为准。
Claims (10)
- 一种OLED显示面板,其中,包括显示器件板、发光器件层以及封装层,所述发光器件层包括阴极、发光层、空穴传输层以及阳极;其中,所述发光器件层还包括设置在所述阴极与发光层之间的电子传输层,所述电子传输层的制成材料包含交联化合物。
- 根据权利要求2所述的OLED显示面板,其中,所述Ar为芘基团或苝基团。
- 根据权利要求2所述的OLED显示面板,其中,所述R 1为三嗪取代基团或吡啶取代基团。
- 根据权利要求2所述的OLED显示面板,其中,所述R 2为短碳链的烷基基团或叔丁基基团。
- 根据权利要求2所述的OLED显示面板,其中,所述R 3为对苯乙烯基基团。
- 一种OLED显示面板的制备方法,其中,包括以下步骤:S10、提供一显示器件板;S20、在所述显示器件板的子像素开口中形成阴极;S30、使用含交联化合物的混合溶液在所述阴极上形成电子传输层;S40、在所述电子传输层上依次制成发光层、空穴传输层和阳极,以形成发光器件层;S50、在所述显示器件板上形成封装层。
- 根据权利要求7所述的OLED显示面板的制备方法,其中,所述步骤S30包括:S31、将所述交联化合物加入到有机溶剂中,搅拌使交联化合物充分溶解;S32、向含交联化合物的有机溶剂中加入添加剂,进行搅拌使添加剂与有机溶剂混合均匀,以形成含交联化合物的混合溶液;S33、将含交联化合物的混合溶液打印至所述阴极上,并进行真空干燥,以形成交联的电子传输层材料;S34、对所述电子传输层材料进行热处理,形成电子传输层。
- 根据权利要求8所述的OLED显示面板的制备方法,其中,所述添加剂包括表面张力调节剂和黏度调节剂。
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US9099651B2 (en) * | 2013-05-28 | 2015-08-04 | Samsung Display Co., Ltd. | Donor substrate and method for forming transfer pattern using the same |
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