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Organic light emission diode and preparation method thereof

An electroluminescent device and luminescent technology, which is applied in the manufacture of organic semiconductor devices, electric solid devices, semiconductor/solid state devices, etc., can solve the problems affecting the light efficiency and life of the device, strong diffusion ability, and small volume of alkali metal ions , to prolong the service life

Inactive Publication Date: 2014-12-03
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the n-doping of the electron transport layer, alkali metal compounds are usually used for doping. This is due to the low work function of alkali metals and the n-doping effect is easy to achieve. However, alkali metal ions are often small in size and strong in diffusion ability. The diffusion distance in the layer is long. In addition to being doped in the transport layer, alkali metal ions may also diffuse into the light-emitting layer, which directly leads to the quenching of excitons and affects the light efficiency and life of the device.

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  • Organic light emission diode and preparation method thereof
  • Organic light emission diode and preparation method thereof
  • Organic light emission diode and preparation method thereof

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Embodiment 1

[0065] A method for preparing an organic electroluminescent device, comprising the following steps:

[0066] (1) Provide a glass substrate 1, place the substrate 1 in deionized water containing detergent for ultrasonic cleaning, clean it with isopropanol and acetone in ultrasonic for 20 minutes, and then dry it with nitrogen; In the coating system, the anode 2 is prepared on the glass substrate 1 by magnetron sputtering, the material of the anode 2 is ITO, the thickness is 100nm, and the sputtering rate is 2nm / s. Then in a vacuum of 1×10 -4 In the vacuum coating chamber of Pa, the hole transport layer 3 and the light-emitting layer 4 are vacuum-evaporated sequentially on the anode 2. The material of the hole transport layer 3 is MeO-TPD doped with F6-TNAP. The mass fraction in the layer is 5%; the thickness of the hole transport layer 3 is 60nm; the material of the light emitting layer 4 is DPVBi, the thickness is 15nm, and the evaporation rate of the hole transport layer 3 a...

Embodiment 2

[0073] A method for preparing an organic electroluminescent device, comprising the following steps:

[0074] (1) Provide a glass substrate. Place the substrate in deionized water containing detergent for ultrasonic cleaning. After cleaning, use isopropanol and acetone in ultrasonic treatment for 20 minutes, and then blow dry with nitrogen. In the vacuum coating system, the anode is prepared on the glass substrate by magnetron sputtering, the material of the anode is GZO, the thickness is 70nm; the sputtering rate is 0.2nm / s. Then in a vacuum of 1×10 -3 In the vacuum coating chamber of Pa, the hole transport layer and the light-emitting layer are vacuum-evaporated sequentially on the anode. The material of the hole transport layer is NPB doped with F4-TCNQ. The mass fraction of F4-TCNQ in the hole transport layer The thickness of the hole transport layer is 40nm; the material of the light-emitting layer is TPBi doped with FIrpic, the doping mass fraction of FIrpic in TPBi is 1...

Embodiment 3

[0081] A method for preparing an organic electroluminescent device, comprising the following steps:

[0082] (1) Provide a glass substrate. Place the substrate in deionized water containing detergent for ultrasonic cleaning. After cleaning, use isopropanol and acetone in ultrasonic treatment for 20 minutes, and then blow dry with nitrogen. In the vacuum coating system, the anode is prepared on the glass substrate by magnetron sputtering, the anode material is AZO, the thickness is 200nm; the sputtering rate is 1nm / s. Then in a vacuum of 1×10 -5 In the vacuum coating chamber of Pa, the hole transport layer and the light-emitting layer are vacuum-evaporated sequentially on the anode. The material of the hole transport layer is 2-TNATA doped with F2-TCNQ, and the F2-TCNQ in the hole transport layer The mass fraction is 30%; the thickness of the hole transport layer is 100nm; the material of the light-emitting layer is Alq doped with DCJTB 3 , DCJTB at Alq 3 The mass fraction o...

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Abstract

The invention discloses an organic light emission diode which comprises a glass substrate, an anode, a hole transfer layer, a light-emitting layer, a hole-blocking layer, an electron transfer layer, a cathode and a packaging cover plate which are sequentially stacked. The packaging cover plate and the glass substrate form an enclosure space; the anode, the hole transfer layer, the light-emitting layer, the hole-blocking layer, the electron transfer layer and the cathode are accommodated in the enclosure space; the hole-blocking layer is made of a mixed material formed by indifferent oxide and a hole-blocking material; and the hole-blocking layer can adsorb alkali metal ions diffused form the electron transfer layer, so that the alkali metal ions do not diffuse to the light-emitting layer, and the service life of the device can be improved. The invention also discloses a preparation method of the organic light emission diode.

Description

technical field [0001] 本发明涉及有机电致发光领域,特别涉及一种有机电致发光器件及其制备方法。 Background technique [0002] 有机电致发光(Organic Light Emission Diode,以下简称OLED),具有亮度高、材料选择范围宽、驱动电压低、全固化主动发光等特性,同时拥有高清晰、广视角,以及响应速度快等优势,是一种极具潜力的显示技术和光源,符合信息时代移动通信和信息显示的发展趋势,以及绿色照明技术的要求,是目前国内外众多研究者的关注重点。 [0003] 到目前为止,尽管全世界各国的科研人员通过选择合适的有机材料和合理的器件结构设计,已使器件性能的各项指标得到了很大的提升,例如采用pn掺杂传输层的工艺,可以降低器件的启动电压以提高光效,并且有利于寿命的提高。对于电子传输层的n掺杂而言,通常采用碱金属化合物进行掺杂,这是由于碱金属功函低,容易实现n掺杂效果,但是往往碱金属离子体积小,扩散能力强,在有机层中的扩散距离长,碱金属离子除了掺杂在传输层中,还有可能扩散至发光层中,直接导致激子的淬灭,影响器件的光效和寿命。为了获得长寿命,稳定的有机电致发光装置,有必要解决这一问题。 Contents of the invention [0004] 为解决上述技术问题,本发明提供了一种有机电致发光器件,包括依次层叠的玻璃基板、阳极、空穴传输层、发光层、空穴阻挡层、电子传输层、阴极和封装盖板,所述封装盖板和玻璃基板形成封闭空间,所述阳极、空穴传输层、发光层、空穴阻挡层、电子传输层、阴极容置在所述封闭空间内,所述空穴阻挡层材质为惰性氧化物和空穴阻挡材料形成的混合材料,所述空穴阻挡层中的物质对电子传输层扩散过来的碱金属离子进行吸附,使碱金属离子不再向发光层扩散,避免激子的淬灭,因而可以提高器件的使用寿命,本发明还公开了该有机电致发光器件的制备方法。 [0005] 第一方面,本发明提供了一种有机电致发光器件,包括依次层叠的玻璃基板、阳极、空穴传输层、发光层、空穴阻挡层、电子传输层和阴极和封装盖板,所述封装盖板和玻璃基板形成封闭空间,所述阳极、空穴传输层、发光层、空穴阻挡层、电子传输层、阴极容置在所述封闭空间内,所述空穴阻挡层的材质为惰性氧化物和空穴阻挡材料形成的混合材料,所述惰性氧化...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56
CPCH10K85/624H10K85/324H10K50/18H10K2102/00H10K71/00
Inventor 周明杰冯小明陈吉星王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD