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A white light organic electroluminescent device

An electroluminescent device, organic technology, applied in the directions of organic light-emitting devices, organic light-emitting device structures, organic semiconductor devices, etc., can solve problems such as complex process routes, and achieve the effects of improving product yield, low driving voltage, and reducing errors

Active Publication Date: 2019-01-18
KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention lies in the fact that multiple sets of high-precision mask plates are required in the preparation process of the white light OLED light-emitting layer in the prior art, and the process route is complicated, and then a white light organic electroluminescent device is provided. By changing the layout of the luminescent material, the luminescent layer only needs a common mask to complete during the preparation process

Method used

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  • A white light organic electroluminescent device
  • A white light organic electroluminescent device
  • A white light organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Such as figure 1 As shown, this embodiment provides a white light organic electroluminescent device, including a first electrode layer 01 (anode), a light emitting layer 04 and a second electrode layer 07 stacked on a substrate; the first electrode layer 01 A first organic layer is arranged between (anode) and the light-emitting layer 04, a second organic layer is arranged between the light-emitting layer 04 and the second electrode layer 07, and the first organic layer includes a hole injection layer 02 And / or the hole transport layer 03, the second organic layer includes the electron transport layer 05 and / or the electron injection layer 06. The light-emitting layer 04 includes a light-emitting host material and a phosphorescent dye, and the light-emitting host material is triplet energy level T 1 H The bipolar thermally activated delayed fluorescent material >2.7eV, and the light emitted by the bipolar thermally activated delayed fluorescent material and the phosph...

Embodiment 2

[0081] Embodiment 2 provides a white organic electroluminescent device, the structure of which is the same as that of Embodiment 1, except for the host material and phosphorescent dye used in the light-emitting layer.

[0082] Device 22: the luminescent host material is an orange bipolar thermally activated delayed fluorescent material with a high triplet state, and the phosphorescent dye is a blue phosphorescent material.

[0083] Device 22 structure: ITO / HAT-CN(7nm) / NPB(50nm) / TCTA(10nm) / Formula 3-3: 5wt% FIrtaz(30nm) / Bphen(30nm) / LiF(0.7nm) / Al(150nm)

[0084] Device 23: the luminescent host material is a yellow bipolar thermally activated delayed fluorescent material with a high triplet state, and the phosphorescent dye is a blue phosphorescent material.

[0085] The structure of the device 23 is as follows: ITO / HAT-CN (7nm) / NPB (50nm) / TCTA (10nm) / Formula 2-3: 5wt% FIrpic (30nm) / Bphen (30nm) / LiF (0.7nm) / Al (150nm ). Among them, the blue phosphorescent dyes are FIrpic and FI...

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Abstract

The invention discloses a white light organic electroluminescent device, which comprises a substrate, and a first electrode layer, a light-emitting layer and a second electrode layer sequentially formed on the substrate, the light-emitting layer includes a light-emitting host material and a phosphorescent dye, The luminescent host material is a bipolar thermally activated delayed fluorescent material with triplet energy level T1H>2.7eV, and the light emitted by the bipolar thermally activated delayed fluorescent material and the phosphorescent dye forms white light. The present invention uses high triplet blue bipolar thermally activated delayed fluorescence (TADF) material as the main body, orange / yellow / red+green phosphorescent material as the object or high triplet orange bipolar thermally activated delayed fluorescence (TADF) material As the host and the blue phosphorescent dye as the object to prepare OLED devices, long-life and high-efficiency devices with low driving voltage can be obtained.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent devices, in particular to an organic electroluminescent device that emits white light by using thermally activated delayed fluorescent material and phosphorescent dye in combination. Background technique [0002] After nearly 30 years of development, organic electroluminescent devices (English full name Organic Light Emitting Device, referred to as OLED) as the next generation of lighting and display technology, has a wide color gamut, fast response, wide viewing angle, no pollution, high contrast, Advantages such as planarization have been applied to a certain extent in lighting and display. Constrained by the luminescent spectrum of the electroluminescent material itself, a single electroluminescent material often cannot achieve a specific target spectrum including white light. If one wants to achieve white light through monochromatic electroluminescent materials, one of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50
CPCH10K50/11H10K2101/10H10K50/125H10K2102/302H10K2101/27
Inventor 赵菲
Owner KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT