Organic electroluminescent display panel and display device

An electroluminescence display and display panel technology, applied in circuits, electrical components, electric solid-state devices, etc., can solve problems such as voltage increase, achieve low power consumption, long-term stable driving voltage, and long service life

Active Publication Date: 2018-01-12
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses an organic electroluminescent display panel and a display device, which are used to solve the problem th

Method used

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  • Organic electroluminescent display panel and display device
  • Organic electroluminescent display panel and display device
  • Organic electroluminescent display panel and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment one, such as image 3 As shown, the P-I-N type OLED provided by the embodiment of the present invention may include a first light-emitting unit 11, a second light-emitting unit 12 and a third light-emitting unit 13 connected in series in sequence. The first light-emitting unit 11, the second light-emitting unit 12 and the third light-emitting unit The three light-emitting units 13 can form white light through brightness ratio; optionally, the first light-emitting unit 11, the second light-emitting unit 12 and the third light-emitting unit 13 can be green light-emitting units, red light-emitting units and blue light-emitting units respectively Specifically, a first charge generation layer (P-I-N type CGL) 21 is provided between the first light emitting unit 11 and the second light emitting unit 12, and a second charge generation layer is provided between the second light emitting unit 12 and the third light emitting unit 13 layer (P-I-N type CGL) 22 .

Embodiment approach

[0059] Mode 1, in the first charge generation layer 21, the electron mobility of the intermediate layer (I layer) 51 is greater than the electron mobility of the N-doped layer host material; in the second charge generation layer 22, the electron mobility of the intermediate layer (I layer) 52 The hole mobility is greater than that of the host material of the P-doped layer.

[0060] Mode 2, in the first charge generation layer 21, the hole mobility of the intermediate layer (I layer) 51 is greater than the hole mobility of the P-doped layer host material; in the second charge generation layer 22, the intermediate layer (I layer) The electron mobility of 52 is greater than that of the host material of the N-doped layer.

[0061] Mode 3, in the first charge generation layer 21, the electron mobility of the intermediate layer (I layer) 51 is greater than the electron mobility of the N-doped layer host material; in the second charge generation layer 22, the electron mobility of the...

Embodiment 2

[0063] Embodiment two, such as Figure 4 As shown, the P-I-N type CGL OLED panel provided by the embodiment of the present invention may include two light-emitting units 10 connected in series, that is, the light-emitting unit 14 and the light-emitting unit 15. The light-emitting unit 14 and the light-emitting unit 15 can form white light through brightness ratio Optionally, the light-emitting unit 14 and the light-emitting unit 15 can be respectively a yellow light-emitting unit and a blue light-emitting unit; specifically, a charge generation layer (P-I-N type CGL) 23 is provided between the light-emitting unit 14 and the light-emitting unit 15, the In the charge generation layer (P-I-N type CGL) 23, the electron mobility of the intermediate layer (I layer) 53 is greater than the electron mobility of the host material of the N-doped layer 40; and / or, the hole mobility of the intermediate layer (I layer) 53 The rate is greater than the hole mobility of the host material of th...

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Abstract

The invention relates to the field of display technologies, and discloses an organic electroluminescent display panel. The organic electroluminescent display panel comprises a cathode layer, an anodelayer, and at least two light-emitting units which are arranged between the cathode layer and the anode layer and connected in series with each other, wherein a charge generation layer is arranged between the at least one pair of adjacent light-emitting units; the charge generation layer comprises a P-doped layer close to one side of the cathode layer, an N-doped layer close to one side of the anode layer, and an intermediate layer arranged between the P-doped layer and the N-doped layer; and electron mobility of the intermediate layer is greater than electron mobility of host materials of theN-doped layer, and/or, hole mobility of the intermediate is greater than hole mobility of host materials of the P-doped layer. The organic electroluminescent display panel provided by the invention has the advantages of long-term stable driving voltage, low power consumption, long service life and high luminous efficiency.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescent display panel and a display device. Background technique [0002] Existing white light organic electroluminescent display devices (OLEDs) are mainly based on red-green-blue (R-G-B) three-color or blue-yellow (B-Y) two-color light-emitting units by adjusting the ratio of light-emitting brightness to form white light. At present, white light OLEDs usually adopt a series stacked structure, for example, a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit are connected in series; and, in order to improve the efficiency of OLED devices, charge is generally added between different light-emitting layers Generation layer (CGL, Chargegeneration layer). [0003] Usually, the CGL layer includes a direct contact N-doping layer (N-doping CGL) and P-doping layer (P-doping CGL) two-layer structure, that is, P-N type CGL, however, ...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L27/32
CPCY04S30/12Y02T90/167
Inventor 马洪虎牛晶华王湘成杨闰
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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