Organic light emitting device

An electroluminescence device and electroluminescence technology, which are applied in the directions of luminescent materials, organic semiconductor devices, circuits, etc., can solve the problem of insufficient color gamut of OLED devices, and achieve the advantages of increasing the color gamut area, increasing the length of the microcavity, and increasing the luminous flux. Effect

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

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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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Examples

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Embodiment 1

[0103] The embodiment of the present invention provides a specific example of an organic electroluminescent device. The organic electroluminescent device in this embodiment includes monochromatic organic light emitting diodes with three light emitting 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. The light transmittance of the second electrode layer was 35%.

[0104] In this embodiment, the λ corresponding to the red organic light emitting diode 1 =630nm,n 1 = 2, L 1 =1260nm;

[0105] The λ corresponding to the green organic light-emitting diode 2 =520nm,n 2 = 3, L 2 =1560nm;

[0106] λ for blue organic light-emitting diodes 3 = 460nm, n 3 = 2, L 3 =920nm.

[0107] The device structure of the red organic light-emitting diode in this embodiment is: ITO (10nm) / Ag (100nm) / ITO (10nm) / CuPc (2...

Embodiment 2

[0112] The embodiment of the present invention provides a specific example of an organic electroluminescent device. The difference from the organic electroluminescence device provided in Example 1 is that the number of light-emitting layers of the green organic light-emitting diode is two, and a connection layer is arranged between the two light-emitting layers.

[0113] In this embodiment, the device structure of the green organic light emitting diode is: ITO (10nm) / Ag (100nm) / ITO (10nm) / CuPc (20nm) / TPD (90nm) / CBP:Ir(ppy) 3 (10%,30nm) / TPBi(40nm) / Li 2 CO 3 (1nm) / HAT-CN(10nm) / CuPc(20nm) / TPD(90nm) / CBP:Ir(ppy) 3 (3%, 30nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

Embodiment 3

[0115] The embodiment of the present invention provides a specific example of an organic electroluminescent device. The difference from the organic electroluminescence device provided in Example 1 is that the light-emitting layer of the green organic light-emitting diode contains a thermal activation delay (TADF) material.

[0116] In this embodiment, the device structure of the green organic light-emitting diode is: ITO (10nm) / Ag (100nm) / ITO (10nm) / CuPc (20nm) / TPD (280nm) / 4CzIPN:Ir(ppy) 3 (10%)(30nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%,15nm) / NPB(60nm).

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Abstract

The invention relates to the technical field of display, and discloses an organic light emitting device. The organic light emitting device comprises a light emitting unit, wherein the light emitting unit has m types of light emitting wavelengths, is a monochromatic organic light emitting diode or a white organic light emitting diode with an optical filter, at least one organic light emitting diodeis provided with a microcavity structure, the microcavity optical path L of the organic light emitting diode with the optical fiber and the light emitting wavelength Lambda of the corresponding lightemitting unit conform to the following relation expression: L=nLambda, n is more than or equal to 2 and is a positive integer, the n corresponding to the at least one organic light emittingdiode is more than or equal to 3, i is less than or equal to m but more than or equal to 1, and i and m are positive integers. The n-order microcavity effect can be achieved in the organic light emitting diode with the microcavity structure, the n is the positive integer more than or equal to 2, a second-order microcavity, a third-order microcavity, a fourth-order microcavity or higher-order microcavity can be achieved, the microcavity effect is improved, the spectrum is further narrowed, and the color gamut area is further expanded.

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): H01L51/52H01L27/32
CPCH10K59/30H10K59/38H10K50/852H10K59/351H10K59/35H10K50/131H10K50/818C09K11/70H10K50/125H10K50/82H10K50/19H10K50/11H10K50/828H10K85/324H10K85/653H10K85/6572H10K85/6574H10K2102/101H10K2102/103H10K2102/351
Inventor 周小康李梦真何麟李维维逄辉李田田田景文高孝裕黄秀颀
Owner YUNGU GUAN TECH CO LTD
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