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Organic optoelectronic device and method for manufacturing the same

A technology of optoelectronic devices and organic electronic materials, which is applied in the field of manufacturing organic optoelectronic devices, and can solve problems such as deterioration of quality and productivity characteristics

Active Publication Date: 2011-01-12
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, it is challenging to obtain this multilayer structure in wet-coated polymer-based OLEDs, where the application of the individual layers is performed by solution-based methods, such as spin-coating, ink-jet printing, etc., because for subsequent layers ( Solvents such as the electron transport layer) may attack the pre-deposited lower layer (such as the emissive layer) and degrade the properties of the fabricated OLED in terms of quality and productivity

Method used

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  • Organic optoelectronic device and method for manufacturing the same
  • Organic optoelectronic device and method for manufacturing the same
  • Organic optoelectronic device and method for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1: Electron-only devices comprising a mixture of polystyrene and TPYMB

[0064] Use pre-cleaned glass as the substrate. First, a 100 nm Al layer was deposited on top of a glass substrate by thermal evaporation as the bottom electrode. Then, about 75 nm thick polystyrene (PS):TPYMB layers (with different TPYMB weight loadings) were deposited on the Al layer by spin-coating technique, followed by baking at 80 °C for 20 min in an argon-filled glove box. Then, a bilayer of NaF / Al top electrode was deposited on the PS:TPYMB electron transport layer by thermal evaporation at 2x10-6 Torr base vacuum. The fabricated device has a stacked layer of glass / PS:TPYMB / NaF / Al. The electrical properties of the devices were measured under forward bias conditions, where the bottom Al electrode was positively biased and the top NaF / Al electrode was negatively biased. These devices behave as unipolar, single-electron devices due to the fact that in each device the hole flow inject...

Embodiment 2

[0069] Example 2: OLEDs Comprising Solution-Processed Based ETM Compositions

[0070] Glass pre-coated with indium tin oxide (ITO) pretreated with UV-ozone was used as the substrate. Deposit about 60 nm thick PEDOT:PSS (poly(3,4-ethylenedioxythiophene) doped with polystyrene sulfonic acid, purchased from H.C. Starck) layer on the ITO layer by spin-coating technique as hole injection layer, followed by baking in air at 180 °C for 1 hour. Then, a 30 nm phosphorescent polymer layer was deposited by spin coating with LEPP chlorobenzene solution. Details of LEPP can be found in US Patent Application Nos. 11 / 736023 and 11 / 736214, which are incorporated herein by reference. The structural formula of LEPP is as follows.

[0071]

[0072] A mixture solution of the electron transport layer composition of polystyrene (PS):TPYMB (40:60% by weight) was prepared by co-dissolving the two substances in toluene, and the mixture solution was deposited on the LEPP layer by spin coating tec...

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Abstract

Provided are an organic optoelectronic device and a method for manufacturing the same. The organic optoelectronic device comprises an anode, an organic electron material layer formed on the anode, an electron transporting layer formed on the organic electron material layer, and a cathode formed on the electron transporting layer. The electron transporting layer comprises a blend of a low molecular weight electron transporting material having a LUMO between about 1.8eV to about 3.OeV and a film- forming polymer having a LUMO greater than that of the low molecular weight electron transporting material.

Description

Background of the invention [0001] The present invention relates to organic optoelectronic devices and methods of manufacturing the same. [0002] Optoelectronic devices, which can be classified as organic optoelectronic devices or inorganic optoelectronic devices, are becoming more and more desirable due to their improved properties. Examples of organic optoelectronic devices include organic light emitting devices (OLEDs), organic photovoltaic devices, organic photodetectors, organic transistors, and the like. [0003] OLEDs have great potential in the display and lighting industries due to their increased brightness, faster response time, lighter weight, and lower power consumption than current state-of-the-art technologies such as incandescent or compact fluorescent devices. To achieve high efficiency, OLEDs are typically formed on a substrate (eg, a glass substrate or a transparent plastic substrate) with a multilayer structure that provides desirable carrier and / or excit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/00H10K99/00
CPCH01L51/0067H01L51/002H01L51/008H01L51/004Y02E10/549H01L51/5048H01L2251/552Y02P70/50H10K71/30H10K85/141H10K85/654H10K50/14H10K2101/30H10K85/658H10K50/16H10K85/322
Inventor 刘杰叶青梁延刚刘升霞
Owner BOE TECH GRP CO LTD