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Organic light-emitting device

An electroluminescent device and a luminescent technology, applied in the direction of electric solid-state devices, organic chemistry, luminescent materials, etc., can solve the problem of low service life, achieve the effects of increasing service life, avoiding the breakage of molecular bonds of compounds, and inhibiting energy transfer

Pending Publication Date: 2018-07-10
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

[0007] The embodiment of the present application provides an organic electroluminescent device, which can be used to solve the problem that the service life of the existing organic electroluminescent device is not high

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0123] In Embodiment 1, the OLED device can be designed as an organic electroluminescent device with the following structure. The structure of the organic electroluminescent device includes a substrate, an anode, a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, insulating buffer layer and cathode.

[0124] The organic light-emitting layer of the organic electroluminescent device is as follows:

[0125] ITO / HATCN[5nm] / NPB[30nm] / D: 5 wt% BCzVBi[30nm] / Bphen[40nm] / LiF[0.5nm] / Al[150nm].

[0126] Among them, compound D is the fluorescent host material provided in the embodiment of the present application, and its structural formula is as follows:

[0127]

[0128] In the molecule of compound D, there are two large steric hindrance groups R' (tert-butyl group here).

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PUM

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Abstract

The invention discloses an organic light-emitting device. The organic light-emitting device comprises an organic light-emitting layer, wherein the organic light-emitting layer comprises a fluorescentmain material and a fluorescent doping material, and the fluorescent main material contains large-steric-hindrance groups. The organic light-emitting device has the advantages that the distance between the fluorescent main material and fluorescent doping material molecules through the large-steric-hindrance groups, so that the fluorescent main material transmits energy to the fluorescent doping material mainly through a Forster energy transmission mechanism, Dexter energy transmission is inhibited, compound molecular bond rupture caused by the Dexter energy transmission is avoided, and the service life of the organic light-emitting device can be prolonged.

Description

technical field [0001] The present application relates to the technical field of light-emitting display, in particular to an organic electroluminescent device. Background technique [0002] Compared with Liquid Crystal Display (LCD), organic electroluminescent devices (OrganicLightEmittingDisplay, OLED) are self-illuminating, and do not need an additional backlight like LCD, which makes OLED more flexible in structure and can usually be designed Large-sized and thin and light display devices, so organic electroluminescent devices have received more and more attention. Among the many OLED devices are organic electroluminescent devices, which fluoresce through electronic transitions. [0003] Under electro-excitation conditions, organic electroluminescent devices will produce 25% singlet states and 75% triplet states. Traditional fluorescent doped materials can only utilize 25% of singlet excitons due to spin-forbidden reasons, so the external quantum efficiency is only limi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/86C07D265/38C07D241/46C07D417/14C07F7/10C07D401/14C07D221/20C07D417/10C07F5/02C07D219/02C07D403/14C07D241/48C07D519/00C07D471/20C09K11/06H01L51/50H01L51/54
CPCC09K11/06C07D209/86C07D219/02C07D221/20C07D241/46C07D241/48C07D265/38C07D401/14C07D403/14C07D417/10C07D417/14C07D471/20C07D519/00C07F5/027C07F7/0814C09K2211/1096C09K2211/1044C09K2211/1037C09K2211/1059C09K2211/1029C09K2211/1033H10K85/657H10K85/40H10K85/6572H10K50/125H10K50/00
Inventor 段炼张东东邱勇赵菲刘嵩
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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