An organic electroluminescence diode and an organic electroluminescence device

A luminescence and diode technology, applied in circuits, electrical components, electric solid devices, etc., can solve the problems of low luminous efficiency of blue light devices, achieve the effects of increased injection difficulty, high luminous efficiency, and improved blue luminous efficiency

Active Publication Date: 2020-06-19
YUNGU GUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the first technical problem to be solved by the present invention is the low luminous efficiency defect of the blue light device in the prior art

Method used

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  • An organic electroluminescence diode and an organic electroluminescence device
  • An organic electroluminescence diode and an organic electroluminescence device
  • An organic electroluminescence diode and an organic electroluminescence device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0062] This embodiment provides a specific example of an organic electroluminescent diode, including a first electrode 11, a third carrier functional layer 12, a first carrier functional layer 13, two blue light emitting layers 14, The second carrier functional layer 15 , the fourth carrier functional layer 16 and the second electrode 17 .

[0063] Wherein, the first electrode 11 is an anode, the third carrier functional layer 12 is a stacked hole injection layer and a hole transport layer, the first carrier functional layer 13 is an electron blocking layer, and two blue light emitting layers 14 They are the phosphorescent light-emitting layer 141 close to the first electrode 11 and the fluorescent light-emitting layer 142 close to the second electrode 17, the second carrier functional layer 15 is a hole blocking layer, and the fourth carrier functional layer 16 is an electron transport layer and an electron injection layer, and the second electrode 17 is a cathode.

[0064] ...

Embodiment 2

[0067] This embodiment provides an organic electroluminescent diode, which is basically the same as the organic electroluminescent diode described in Example 1, the only difference being:

[0068] In organic electroluminescent diodes, ΔE h1 0eV, ΔE e1 is 0.2eV; the phosphorescent light-emitting layer 141 is made of a phosphorescent material, specifically TCTA:FIrpic (5%, 20nm), and its hole mobility is 5.2eV -4 cm 2 / V / s; the fluorescent light-emitting layer 142 is made of a fluorescent material, specifically TPBi:DSA-Ph (5%, 20nm), and its electron mobility is 8.2e -4 cm 2 / V / s.

[0069] The device structure of the organic electroluminescent diode in the present embodiment is: ITO (10nm) / Ag (100nm) / ITO (10nm) / HATCN (5nm) / m-MTDATA (20nm) / TCTA (200nm) / TCTA:FIrpic( 5%, 20nm) / TPBi:DSA-Ph(5%, 20nm) / BPhen(5nm) / TmPy Pb(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

Embodiment 3

[0071] This embodiment provides an organic electroluminescent diode, which is basically the same as the organic electroluminescent diode described in Example 1, the only difference being:

[0072] The third carrier functional layer 12 is not provided, and the fourth carrier functional layer 16 is an electron injection layer.

[0073] The device structure of the organic electroluminescent diode in the present embodiment is: ITO (10nm) / Ag (100nm) / ITO (10nm) / TCTA (300nm) / TCTA:FIrpic (5%, 20nm) / T mPyPb:DSA-Ph (5%, 20nm) / BPhen(5nm) / TmPyPb(40nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

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Abstract

The invention discloses an organic electroluminescent diode, which comprises a first electrode, a first carrier functional layer, at least two blue light emitting layers, a second carrier functional layer and a second electrode stacked in sequence; the blue light emitting layer Comprising a phosphorescent light-emitting layer close to the first carrier functional layer and a fluorescent light-emitting layer close to the second carrier functional layer; the energy level barrier between the first carrier functional layer and the phosphorescent light-emitting layer is smaller than that of the second carrier functional layer Layer and the energy level barrier of the fluorescent light-emitting layer, the carrier mobility of the phosphorescent light-emitting layer is smaller than that of the fluorescent light-emitting layer. The organic electroluminescent diode emits blue phosphorescence from the phosphorescent light-emitting layer at low voltage, and emits blue fluorescence from the fluorescent light-emitting layer under high voltage, thereby improving its luminous efficiency. The present invention provides an organic electroluminescent device, wherein the blue sub-pixel unit is the above-mentioned organic electroluminescent diode, which balances the luminous efficiency of each sub-pixel unit of the device under low voltage, and improves the color shift of the device.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to an organic electroluminescence diode and an organic electroluminescence device. Background technique [0002] Organic light-emitting diode (English full name Organic Light Emitting Display, referred to as OLED) is an active light-emitting display device. Due to its advantages such as simple preparation process, low cost, high contrast, wide viewing angle, and low power consumption, it is expected to become the next-generation mainstream flat panel. Display technology is one of the most concerned technologies in flat panel display technology. [0003] Obtaining efficient monochrome display of red, green and blue primary colors is an indispensable part of realizing full color display. After more than 20 years of research and development, especially the discovery of phosphorescent materials, the performance of red and green monochrome organic electroluminescent devices...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L27/32
CPCH10K59/35H10K50/125H10K50/11
Inventor 逄辉李梦真李维维田景文李田田周小康
Owner YUNGU GUAN TECH CO LTD
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