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Organic electroluminescent device and organic electroluminescent apparatus

An electroluminescence and organic technology, applied in the fields of organic electroluminescence devices and organic electroluminescence devices, can solve the problems of low luminous brightness and color shift of red photonic pixels and green photonic pixels, and achieve the effect of increasing the control effect.

Active Publication Date: 2018-12-11
YUNGU GUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, when the blue sub-pixel is turned on, although the voltage is mainly across the blue sub-pixel, due to the better conductivity of the common hole injection layer, part of the voltage will be applied to the green sub-pixel through the common hole injection layer. In the photo sub-pixel and / or the red sub-pixel, since the turn-on voltages of the red sub-pixel and the green sub-pixel are lower than the turn-on voltage of the blue sub-pixel, the red sub-pixel and / or the green sub-pixel are easy to be turned on at the same time
That is, in the case of low gray scale, the luminous brightness of the red sub-pixel and / or green sub-pixel cannot strictly meet the requirements to achieve the low-brightness display effect, and the low gray scale color cast (reddish) phenomenon occurs

Method used

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  • Organic electroluminescent device and organic electroluminescent apparatus
  • Organic electroluminescent device and organic electroluminescent apparatus
  • Organic electroluminescent device and organic electroluminescent apparatus

Examples

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Embodiment 1

[0056] An embodiment of the present invention provides an organic electroluminescent device, such as Figure 4 As shown, it includes a first electrode layer 1, a hole injection layer 2, a hole transport layer 3, an electron blocking layer 4, a light emitting layer 5, a hole blocking layer 6, an electron transport layer 7, and an electron injection layer 8 stacked in sequence. As well as the second electrode layer 9, the light-emitting layer 5 includes a host material and a guest material, and the first carrier functional layer is an electron blocking layer 4, which is doped with a guest material.

[0057] Wherein, the light emitting layer 5 is a red light emitting layer or a green light emitting layer, that is, this embodiment provides a red organic electroluminescent device and a green organic electroluminescent device;

[0058] The structure of the red light device is: ITO(100nm) / CuPc(20nm) / NPB(40nm) / TPD:Ir(piq) 3 (3%,65nm) / CBP:Ir(piq) 3 (3%, 30nm,) / NPB(5nm) / TPBi(40nm) / LiF...

Embodiment 2

[0061] The embodiment of the present invention provides an organic electroluminescent device, the structure of which is the same as that of embodiment 1, except that the hole blocking layer 6 is the second carrier functional layer, which is also doped with the guest material of the light emitting layer.

[0062] The structure of the red light device is: ITO(100nm) / CuPc(20nm) / NPB(40nm) / TPD:Ir(piq) 3 (3%,65nm) / CBP:Ir(piq) 3 (3%,30nm) / NPB:Ir(piq) 3 (3%,5nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%,15nm) / NPB(60nm);

[0063] The structure of the green light device is: ITO(100nm) / CuPc(20nm) / NPB(40nm) / TPD:Ir(ppy) 3 (10%,35nm) / CBP:Ir(ppy) 3 (10%,30nm) / NPB:Ir(ppy) 3 (10%, 5nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

Embodiment 3

[0065] The embodiment of the present invention provides an organic electroluminescent device, the structure of which is the same as that of embodiment 1, except that the electron blocking layer 4 is not included, and the first carrier functional layer is a hole transport layer.

[0066] The structure of the red light device is: ITO(100nm) / CuPc(85nm) / NPB:Ir(piq) 3 (3%,40nm) / CBP:Ir(piq) 3(3%, 30nm) / NPB(5nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm);

[0067] The structure of the green light device is: / ITO(100nm) / CuPc(55nm) / NPB:Ir(ppy) 3 (10%,40nm) / CBP:Ir(ppy) 3 (10%, 30nm) / NPB(5nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

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Abstract

The invention relates to the technical field of display. The organic electroluminescent device comprises a first electrode layer, a first carrier functional layer, a light emitting layer and a secondelectrode layer which are stacked in sequence. The luminescent layer comprises a host material and a guest material. By doping the guest material in the first carrier functional layer, the carrier migration efficiency can be effectively regulated, and the lighting voltage of the organic electroluminescent device can be regulated. The organic electroluminescent device of the invention, comprises aplurality of pixel elements distributed in the array, by forming a light emitting layer guest material doping structure in a first carrier functional layer in a red photon pixel unit and / or a green photon pixel unit, the turn-on voltage of red photon pixel unit and / or green photon pixel unit are improved, the turn-on voltage difference is reduced, the color deviation problem of organic electroluminescent device is alleviated effectively, and the color stability of the device is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescence device and an organic electroluminescence device. Background technique [0002] Organic electroluminescent display (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 manufacturing process, low cost, high contrast, wide viewing angle, and low power consumption, it is expected to become the next generation of mainstream flat panel. Display technology is one of the most concerned technologies in flat panel display technology. [0003] figure 1 It shows the voltage-brightness curves of the RGB three-color sub-pixels in the pixel juxtaposition method full-color display device. It can be seen from the figure that in the existing OLED display device, the turn-on voltages of the RGB three-color sub-pixels are inconsistent. Specifically, the turn-on volt...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L27/32
CPCH10K59/35H10K50/12
Inventor 田景文何麟李维维李梦真李田田
Owner YUNGU GUAN TECH CO LTD
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