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Organic light emitting device and manufacturing method thereof

By using host materials and dyes with small triplet energy level differences in organic electroluminescent devices, the effective utilization of exciton energy is achieved, the problems of short device life and low efficiency are solved, the luminous efficiency is improved and the process is simplified process.

Active Publication Date: 2017-01-11
KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention lies in the short life of the device due to exciton quenching in the single-layer organic electroluminescent device of the existing structure, and then provides an organic electroluminescent device, which electroluminescent The triplet energy level T of the host material of the device 1 and the singlet energy level S 1 Poor T 1 -S 1 ≤0.3eV, the device structure adopted in the present invention can make full use of the triplet energy in the host material and the dye, improve the luminous efficiency and enhance the service life of the device

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The device 1 structure of the present embodiment is as follows:

[0067] glass / ITO / 1-24:CBP:Ir(piq) 2 (acac)(5%) / cathode

[0068] Device 1 is composed of a substrate, an anode layer, a light-emitting layer and a cathode layer, and does not require a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, etc., and the main material of the light-emitting layer is the formula (1-24) It is shown that the heat-activated sensitized fluorescent material and the hole-transporting material CBP are composed, and the mass ratio of the two is 1:1.

Embodiment 2

[0070] The device 2 structure of the present embodiment is as follows:

[0071] glass / ITO / 1-88:BAlq:Ir(piq) 2 (acac)(5%) / cathode

[0072] The main material of the light-emitting layer in device 2 is composed of an electron-transporting material and a heat-activated sensitized fluorescent material shown in formula (1-88), and the mass ratio of the two is 1:1; here, the heat-activated sensitized fluorescent material is a hole transmission material.

Embodiment 3

[0074] The device 3 structure of the present embodiment is as follows:

[0075] glass / ITO / 1-88:1-24:Ir(piq) 2 (acac)(5%) / cathode

[0076] The main material of the light-emitting layer in device 3 is an exciplex composed of an electron transport thermally activated sensitized fluorescent material and a hole transport thermally activated sensitized fluorescent material, and the mass ratio of the two is 1:1.

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PUM

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Abstract

The invention relates to an organic light emitting device, which comprises a substrate, and a light emitting device formed on the substrate, wherein the light emitting device is composed of a first electrode layer, a light emitting layer and a second electrode layer; the light emitting layer comprises a main body material and a dye; the main body material is formed by materials with a hole transport ability; the triplet energy level T1 of at least one material in the main body material is higher than a triplet energy level S1, and T1-S1 < / =0.3eV; or, the triplet energy level T1 of at least one material in the main body material is higher than the triplet energy level S1, and T1-S1 > / =1eV, and the difference between the doublet and triplet energy level and the singlet energy level is -0.1 to 0.1 eV. The device structure can make full use the triplet energy in the main body material and the dye, and while the light emitting efficiency is improved, the service life of the device is enhanced.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent devices, in particular to an organic electroluminescent device with a single organic layer. Background technique [0002] An organic electroluminescent device (OLED) generally includes a plurality of pixels, each pixel consisting of several sub-pixels. One of the currently widely used schemes in small and medium sizes consists of red, green, and blue pixels forming one pixel. Each pixel includes a hole transport layer, a light-emitting layer, and an electron transport layer. A hole / exciton blocking layer is arranged between the light-emitting layer and the electron transport layer. The light-emitting layer includes a blue light-emitting layer, a green light-emitting layer or a red light-emitting layer. Light emitting layer. In addition, a green light compensation layer and a red light compensation layer may also need to be arranged between the hole transport layer and the hole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/00H10K99/00
CPCH10K71/164H10K85/60H10K85/324H10K50/121C07D209/80C07D209/86C07D219/02C07D221/20C07D241/48C07D265/38C07D285/14C07D403/10C07D403/14C07D413/10C07D413/14C07D417/04C07D417/10C07D417/14C07D471/20C07D487/14C07D487/16H10K50/11H10K2101/10H10K2101/90H10K2101/20H10K85/615H10K85/654H10K50/14H10K71/00H10K85/633H10K85/30H10K85/381H10K85/631H10K85/636H10K85/655H10K85/656H10K85/657H10K85/6565H10K85/6572H10K50/12H10K50/15H10K50/16H10K71/16H10K85/624H10K2101/27H10K2102/351C07C2603/24C07C2603/97C07C211/61C07C255/58C07C317/36C07F1/02C07F3/02C07F3/06
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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