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Organic electroluminescent device and preparation method thereof

An electroluminescence device and electroluminescence technology, which are applied in the manufacturing of organic semiconductor devices, electric solid state devices, semiconductor/solid state devices, etc., can solve problems such as complex structure, and achieve the effect of improving injection capacity and simple structure

Inactive Publication Date: 2014-10-29
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The OLED device with double-sided light-emitting display uses two organic electroluminescent devices to be bonded back to back at the same time, and the structure becomes more complicated.

Method used

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  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof

Examples

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preparation example Construction

[0051] See also figure 2 , The manufacturing method of the organic electroluminescent device 100 of one embodiment includes the following steps:

[0052] In step S110, a cathode 20 is prepared by vacuum sputtering on the surface of the transparent substrate 10, and the material of the cathode 20 is a transparent conductive oxide.

[0053] Vacuum sputtering at a vacuum pressure of 1×10 -3 ~1×10 -5 Performed under Pa.

[0054] The material of the transparent substrate 10 is glass.

[0055] In this embodiment, the transparent substrate 10 is pre-treated before the cathode 20 is formed on the surface of the transparent substrate 10. The pre-treatment includes: placing the transparent substrate 10 in deionized water containing detergent for ultrasonic cleaning. Use isopropanol, acetone, ultrasonic treatment for 20 minutes, and then dry with nitrogen.

[0056] Preferably, the material of the cathode 20 is selected from at least one of indium tin oxide film (ITO), indium zinc oxide (IZO), a...

Embodiment 1

[0088] The structure prepared in this embodiment is a glass transparent substrate / ITO / Li / LiF / Bphen / DCJTB:Alq 3 / NPB / CuPc / MoO 3 / Li 2 CO 3 :BCP / Bphen / FIrpic: TPBi / NPB / CuPc / ITO organic electroluminescent device.

[0089] The manufacturing method of this organic electroluminescence device includes the following steps:

[0090] Step 1: Provide a light-transmitting substrate, place the light-transmitting substrate in deionized water containing detergent for ultrasonic cleaning, and then use isopropanol and acetone in ultrasonic waves for 20 minutes, and then dry it with nitrogen.

[0091] Step 2: When the vacuum degree is 5×10 -4 In the Pa vacuum coating system, the cathode is sputtered on the surface of the transparent substrate. The material is ITO with a thickness of 100nm; then it is transferred to a vacuum of 5×10 -4 In the Pa thermal evaporation system, a low work function metal layer is prepared by evaporation on the surface of the cathode, the material is Li, the thickness is 5nm, ...

Embodiment 2

[0097] The structure prepared in this embodiment is a glass transparent substrate / AZO / Ca / LiF / BCP / DPVBi / 2-TNATA / ZnPc / WO 3 / Li 2 CO 3 :Alq 3 / TPBi / Ir(piq) 3 :CBP / NPB / WO 3 / AZO's organic electroluminescent device.

[0098] The manufacturing method of this organic electroluminescence device includes the following steps:

[0099] Step 1: Provide a light-transmitting substrate, place the light-transmitting substrate in deionized water containing detergent for ultrasonic cleaning, and then use isopropanol and acetone in ultrasonic waves for 20 minutes, and then dry it with nitrogen.

[0100] Step 2: When the vacuum degree is 1×10 -3 In the Pa vacuum coating system, the cathode is sputtered on the surface of the transparent substrate. The material is AZO and the thickness is 70nm; then it is transferred to a vacuum of 1×10 -3 In Pa thermal evaporation system, a low work function metal layer is prepared by evaporation on the surface of the cathode, the material is Ca, the thickness is 10nm, an...

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Abstract

The invention discloses an organic electroluminescent device comprising a transparent substrate, cathode sequentially stacked, low work function metal layer, a first light-emitting unit, a charge generating layer, a second light-emitting unit and the anode, the cathode material for transparent conductive oxide, the work function of the low work function metal layer material is 2.7eV ~ 3.0eV, the charge generating layer comprises a laminated to the first light-emitting unit surface metal oxide layer and N type doping layer laminated on the metal oxide layer on surface, the metal oxide layer material selected from the group consisting of molybdenum trioxide, tungsten trioxide and five oxygen at least a two V, the N type doping layer material including lithium carbonate organic materials and doping in the organic material, the quality of the lithium carbonate and the organic material ratio of 15: 100, the anode material for transparent conductive oxide. The organic electroluminescent device has advantages of simple structure and double light. The invention also provides an organic electroluminescent device preparation method.

Description

Technical field [0001] The invention relates to an organic electroluminescence device and a preparation method thereof. Background technique [0002] The light-emitting principle of organic electroluminescent devices (OLED) is based on the fact that electrons are injected from the cathode to the lowest unoccupied molecular orbital (LUMO) of organic matter under the action of an external electric field, while holes are injected from the anode to the highest occupied orbital (HOMO) of organic matter. ). Electrons and holes meet and recombine in the light-emitting layer to form excitons. The excitons migrate under the action of an electric field, transfer energy to the luminescent material, and excite the electrons to transition from the ground state to the excited state. The excited state energy is deactivated by radiation to produce photons , Release light energy. [0003] Most of the existing OLEDs can only take out the light from one side of the anode or the cathode to produce b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K50/171H10K50/81H10K50/828H10K2102/321H10K2102/3031
Inventor 周明杰冯小明张娟娟王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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