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Organic electroluminescence device, display device and lighting device

A technology of electroluminescent devices and electroluminescent elements, which is applied in the direction of circuits, electrical components, and electric solid-state devices, can solve problems such as short efficiency and lifespan, impurity in light color, and high production costs, and achieve improved luminous efficiency and life, simple process, and refined structure

Pending Publication Date: 2022-03-01
SHANGHAI BAYI SPACE ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition to the high production cost of phosphorescent materials, blue light has always been the biggest barrier to phosphorescent materials. Even after 20 years of industry-university research, it is still impossible to develop blue phosphorescent materials with efficiency, stability and pure color. Highly anticipated TADF material, the spectrum is too wide, and the color of light emitted is impure
Today, all OLEDs displays still use fluorescent materials as the blue light source. In order to have sufficient brightness, the size of blue pixels is about twice that of red and green, and efficiency and lifespan are still its shortcoming.

Method used

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  • Organic electroluminescence device, display device and lighting device
  • Organic electroluminescence device, display device and lighting device
  • Organic electroluminescence device, display device and lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Blue first organic light-emitting layer and blue phosphorescent outer light-emitting layer device as an example

[0046] Such as figure 1 As shown, to prepare an organic electroluminescent device emitting blue light from the top, first, clean the glass substrate 101 with ultrapure water, on which a patterned 120nm thick indium tin oxide (ITO) anode layer 102 is previously coated, and use UV ozone and Oxygen plasma treatment of ITO surface. Afterwards, the substrate 101 is put into a glove box filled with nitrogen and dried to remove moisture, and then installed on a support and loaded into an evaporation chamber. The layers specified below, in a vacuum of about 1 x 10 -6 in the case of trust The rate per second is sequentially coated on the ITO anode layer 102 by thermal evaporation. First vapor-deposited aluminum is the anode layer 102 with a thickness of 100 nm, and then vapor-deposited molybdenum trioxide successively as the hole injection layer (HIL) 103 with a...

Embodiment 2

[0048] Blue-light first organic light-emitting layer and TADF blue-light outer light-emitting layer device as an example

[0049] Such as figure 2 As shown, to prepare an organic electroluminescent device emitting blue light from the top, first, clean the glass substrate 101 with ultrapure water, on which a patterned 120nm thick indium tin oxide (ITO) anode layer 102 is previously coated, and use UV ozone and Oxygen plasma treatment of ITO surface. Afterwards, the substrate 101 is put into a glove box filled with nitrogen and dried to remove moisture, and then installed on a support and loaded into an evaporation chamber. The layers specified below, in a vacuum of about 1 x 10 -6 in the case of trust The rate per second is sequentially coated on the ITO anode layer 102 by thermal evaporation. First vapor-deposit aluminum as the anode layer 102 with a thickness of 100nm, and then successively vapor-deposit a hole injection layer (HIL) 103, hole transport layer (HTL) 1...

Embodiment 3

[0051] Blue-light first organic light-emitting layer and orange-light outer light-emitting layer device as an example

[0052] Such as figure 2 As shown, to prepare an organic electroluminescent device that emits white light from the top, first, clean the glass substrate 101 with ultrapure water, which is coated with a patterned 120nm thick indium tin oxide (ITO) anode layer 102 in advance, and use UV ozone and Oxygen plasma treatment of ITO surface. Afterwards, the substrate was dried in a nitrogen-filled glove box to remove moisture, then mounted on a stand and loaded into an evaporation chamber. The layers specified below, in a vacuum of about 1 x 10 -6 in the case of trust The rate per second is sequentially coated on the ITO anode layer 102 by thermal evaporation. First vapor-deposit aluminum as the anode layer 102 with a thickness of 100nm, and then successively vapor-deposit a hole injection layer (HIL) 103, hole transport layer (HTL) 104, electron blocking ...

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Abstract

The present invention relates to an organic electroluminescent device, a display device, and a lighting device, the organic electroluminescent device of the present invention integrating an organic electroluminescent element and an independent unit multi-light-emitting layer of an external light-emitting layer, a material which is poor in thermal stability or oxidation and reduction stability but high in internal quantum efficiency is moved out of the organic electroluminescent element and transferred to the outside of the light-emitting side of the organic electroluminescent element, and emitted light of the organic electroluminescent element is utilized to excite the material of the external light-emitting layer to emit light at the same time, or only the external light-emitting layer emits light, so that the internal quantum efficiency of the organic electroluminescent element is improved. Materials with poor stability are prevented from being in direct contact with electrical excitons, the luminous efficiency is improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to an organic electroluminescence device, a display device and an illumination device. Background technique [0002] The organic electroluminescent element (OLED) is composed of a cathode, an anode, and an organic light-emitting material between the cathode and the anode. By applying a voltage across the cathode and anode of the element, the electrical energy is converted into light. It has a wide angle and high contrast. and faster response times. Tang and Van Slyke of Eastman Kodak Company reported an organic light-emitting element in 1987, arylamine hole transport layer and three (8-hydroxyquinoline) aluminum layer as electron transport layer and light-emitting layer (AppliedPhysics Letters, 1987, 51(12):913-915). Green light was emitted from the element after a voltage was applied across it, an invention that set the stage for the development of modern organic lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32
CPCH10K59/50
Inventor 朱波姜坤曹建华董焕章唐伟王志杰李程辉徐先锋
Owner SHANGHAI BAYI SPACE ADVANCED MATERIAL CO LTD