Organic electroluminescence device

An electroluminescent device and electroluminescent technology, which are applied to circuits, electrical components, electrical solid devices, etc., can solve the problem of insufficient color gamut of OLED devices, and achieve the effects of increasing the color gamut area, increasing the thickness, and enhancing the strength of the microcavity.

Active Publication Date: 2018-09-07
YUNGU GUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is that in the prior art, the color gamut of OLED devices is not high enough

Method used

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  • Organic electroluminescence device
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  • Organic electroluminescence device

Examples

Experimental program
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Embodiment 1

[0083] The embodiment of the present invention provides a specific example of an organic electroluminescence device. The organic electroluminescence device in this embodiment includes three types of monochromatic light-emitting organic light-emitting diodes with luminous wavelengths, namely red organic light-emitting diodes, green light organic light-emitting diodes and blue light organic light-emitting diodes. Among them, the three organic light emitting diodes all have a microcavity structure.

[0084] Each organic light emitting diode includes a first electrode layer, a light emitting layer and a second electrode layer which are stacked. Wherein, there are two light-emitting layers in the green organic light-emitting diode, and the two light-emitting layers are connected through a transparent connection layer, and the transparent connection layer is Li 2 CO 3 / HAT-CN / TAPC, the thickness is 40nm, and the refractive index is 1.8. Blue light and red light organic light emit...

Embodiment 2

[0094] The embodiment of the present invention provides a specific example of an organic electroluminescence device. Its structure is the same as embodiment 1, and the difference with the organic electroluminescent device that embodiment 1 provides is:

[0095] The second electrode layer of the green organic light emitting diode includes two metal oxide layers stacked one on top of the other, and a metal layer arranged between the two metal oxide layers.

[0096] The device structure of the green organic light-emitting diode is: Ag(10nm) / ITO(160nm) / CuPc(20nm) / TPD(100nm) / CBP:Ir(ppy) 3 (10%,30nm) / TPBi(40nm) / Li 2 CO 3 (1nm) / HAT-CN(10nm) / CuPc(20nm) / TPD(100nm) / CBP:Ir(ppy) 3 (3%,30nm) / TPBi(40nm) / LiF(1nm) / MoO 3 / Ag / MoO 3(5nm / 5nm / 5nm) / NPB(60nm).

Embodiment 3

[0098] The embodiment of the present invention provides a specific example of an organic electroluminescence device. Its structure is the same as embodiment 1, and the difference with the organic electroluminescent device that embodiment 1 provides is:

[0099] The transparent connection layer is TAPC with a thickness of 1 nm and a refractive index of 1.8.

[0100] The device structure of the green organic light emitting diode in this embodiment is: Ag(10nm) / ITO(160nm) / CuPc(20nm) / TPD(120nm) / CBP:Ir(ppy) 3 (10%,30nm) / TPBi(40nm) / TAPC(1nm) / TPD(120nm) / CBP:Ir(ppy) 3 (3%, 30nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

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Abstract

The invention relates to the field of display technology, and discloses an organic electroluminescence device. The organic electroluminescence device comprises m kinds of light emitting units with different light emitting wavelengths, the light emitting unit is a monochromatic light organic light emitting diode, at least one organic light emitting diode having a microcavity structure is provided with at least two light emitting layers, and the thicknesses of first electrode layers in the organic light emitting diodes corresponding to the light emitting units with different light emitting wavelengths are not the same; a microcavity optical path L of the organic light emitting diode having the microcavity structure and the light emitting wavelength lambada of the corresponding light emittingunit meet the following relational expression: Li=ni lambada i; wherein n is greater than or equal to 2, n is a positive integer, and n corresponding to at least one organic light emitting diode is greater than or equal to 3. That is, an n-order microcavity effect can be realized in the organic light emitting diode having the microcavity structure, and n is a positive integer greater than or equal to 2, in this way, a second-order microcavity, a third-order microcavity or a higher-order microcavity can be achieved, the microcavity effect is enhanced, the spectrum is further narrowed, and thusthe color gamut area is increased.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescent device. Background technique [0002] Organic electroluminescence display (English full name Organic Light Emitting Display, referred to as OLED) is an active light-emitting display device, due to its advantages of high contrast, wide viewing angle, low power consumption, thinner volume, etc. It is prepared by a roll to roll process and is easy to realize flexible display, which is one of the most concerned technologies in the current flat panel display technology. [0003] With the continuous development of OLED technology, higher and higher requirements are placed on the performance of display devices. For example, increasing the color gamut, etc. The so-called color gamut is a method of encoding a color, and also refers to the sum of colors that a technical system can produce. figure 1 It is a color coordinate diagram formulated by NTSC (Natio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52
CPCH10K50/125H10K50/852
Inventor 田景文周小康何麟李维维李梦真李田田逄辉
Owner YUNGU GUAN TECH CO LTD
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