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Infrared organic electroluminescent device

An electroluminescent device and luminescence technology, which is applied in the fields of electric solid-state devices, electrical components, organic chemistry, etc., can solve the problems of OLED chromaticity, lack of stability, composite light-emitting area deviation, etc., and achieve good chromaticity and long life , high efficiency effect

Active Publication Date: 2011-06-01
KUNSHAN VISIONOX DISPLAY TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electron transport ability of anthracene derivatives is stronger than the hole transport ability. When the ETL with high electron mobility is matched with the light-emitting host, it is easy to cause the composite light-emitting area to be biased towards the HTL interface, resulting in the lack of chromaticity and stability of OLEDs.

Method used

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  • Infrared organic electroluminescent device

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Device structure: ITO / NPB(20nm) / ADN:RD-1(40nm, 1%) / C8(20nm) / LiF(0.5nm) / Al(150nm)

[0058] With the ITO conductive glass substrate etched with specific patterns as the substrate, the substrate is ultrasonically cleaned in deionized water containing cleaning solution. The temperature of the cleaning solution is about 60°C, and then the cleaned substrate is cleaned Dry it, put it into the evaporation chamber to evaporate the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the electron injection layer, and the cathode structure in sequence, and the chamber pressure during the evaporation process is lower than 5.0×10 -3 Pa.

[0059] In this embodiment, 20 nm of NPB is deposited on the surface of the ITO anode as a hole transport layer. The thickness of the light-emitting layer is 40nm, 9,10-bis(2-naphthyl)anthracene (ADN) is the main body, the doping dye is RD-1, and the doping ratio is 1%. Deposit 20 nm of compound C...

Embodiment 2

[0061] Device structure: ITO / NPB(20nm) / ADN:RD-6(30nm, 0.5%) / C10(15nm) / LiF(0.5nm) / Al(150nm)

[0062] The device with the above structure was prepared according to the method of Example 1, except that the thickness of the luminescent layer was 30nm, RD-5 was used as the luminescent dye, the doping ratio was 0.5%, and C10 was the electron transport material with a thickness of 15nm.

Embodiment 3

[0064] Device structure: ITO / NPB(20nm) / NNPA:RD-8(40nm, 2%) / C51(10nm) / LiF(0.5nm) / Al(150nm)

[0065] The device with the above structure was prepared according to the method of Example 1, except that 9-(2-naphthyl)-10-[3-(2-naphthyl)phenyl]anthracene (NNPA) was used as the main body of the light-emitting layer, and RD-8 It is a luminescent dye, the doping ratio is 2%, the electron transport material is C51, and the thickness is 10nm.

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Abstract

The invention discloses an infrared organic electroluminescent device. The device comprises a pair of electrodes and an organic luminescent dielectric layer arranged between the electrodes, wherein the organic luminescent dielectric layer at least comprises a luminescent layer and an electron transmission layer; the luminescent layer comprises a main body material and a guest body material; the hole mobility of the guest body material is between 10<-3> and 10<-6>cm<2>V<-1>s<-1>, and is more than 1 to 3 orders of magnitude more than the electron mobility; the hole mobility of the electron transmission material is more than or equal to 10<-4>cm<2>V<-1>s<-1>; and the energy gap (Eg) of the guest body material is between 2.18 and 1.59eV. The organic electroluminescent device has the advantages of high efficiency, excellent chromaticity and long service life.

Description

technical field [0001] The present invention relates to an organic electroluminescence (EL) element, more specifically, relates to a high-efficiency organic EL element. technical background [0002] Organic electroluminescent display (hereinafter referred to as OLED) has a series of advantages such as self-luminescence, low-voltage DC drive, full curing, wide viewing angle, light weight, simple composition and process, etc. Compared with liquid crystal display, organic electroluminescent display is not It requires a backlight source, has a large viewing angle and low power, and its response speed can reach 1000 times that of a liquid crystal display, but its manufacturing cost is lower than that of a liquid crystal display with the same resolution. Therefore, organic electroluminescent displays have broad application prospects. [0003] The general structure of an organic electroluminescent device includes in turn: a substrate, an anode, an organic layer, and a cathode, and ...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54C07D213/06C07D401/14C07D409/14C07D417/14C07D235/06C07C211/61C07C211/54
Inventor 邱勇谢静董艳波
Owner KUNSHAN VISIONOX DISPLAY TECH
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