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Method for preparing OLED light-emitting device with metal-enhanced fluorescence outer conversion layer

A technology for metal-enhanced fluorescence and light-emitting devices, which can be used in organic semiconductor devices, semiconductor/solid-state device manufacturing, and electrical solid-state devices, etc., and can solve problems such as limitations

Inactive Publication Date: 2014-12-24
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This leads to great limitations in the production of out-conversion OLEDs

Method used

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  • Method for preparing OLED light-emitting device with metal-enhanced fluorescence outer conversion layer
  • Method for preparing OLED light-emitting device with metal-enhanced fluorescence outer conversion layer
  • Method for preparing OLED light-emitting device with metal-enhanced fluorescence outer conversion layer

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preparation example Construction

[0025] A method for preparing an OLED light-emitting device with a metal-enhanced fluorescent outer conversion layer, comprising the following steps:

[0026] Such as figure 1 As shown, 1) Preparation of nano-metal particle layer: select glass and metal materials according to the preset structure of glass and fluorescent light-emitting layer; vacuum-deposit a metal layer on clean glass, and then place the glass and metal layer on Carry out heat treatment in a vacuum environment, the heat treatment temperature is 150-450°C, and the heat treatment time is 10-180min; so that the metal layer forms a metal nanoparticle structure;

[0027] 2) Preparation of fluorescent light-emitting layer: according to the preset structure of glass and fluorescent light-emitting layer, select fluorescent light-emitting materials and high molecular polymers; dissolve high molecular polymers in at least one of organic solvents or inorganic solvents, mass percentage 5%-35%; uniformly disperse the flu...

Embodiment 1

[0037] In this embodiment, the glass used is the glass that has been coated with ITO film. The fluorescent luminescent material adopts the green luminescent material Rhodamine B. First, a metal silver film with a thickness of 10nm is formed on the back of the ITO glass by vacuum evaporation, placed in a vacuum environment, heat-treated at a temperature of 150°C for 16 minutes, and then cooled to room temperature, and the silver film on the back of the ITO glass is obtained. A nano-metal Ag particle layer, the nano-Ag layer has a nano-metal structure. Mix polyvinyl alcohol PVA evenly with distilled water to obtain a 12% PVA aqueous solution, and then add rhodamine B (RB) to the above solution to obtain 6.23×10 -4 mol / l RB solution. Then, a RB-PVA fluorescent layer with a thickness of 3 μm was coated on the glass with the nanometer metal particle layer by spin coating.

[0038] Such as image 3 As shown, followed by vacuum evaporation method, on the ITO glass vacuum evaporat...

Embodiment 2

[0040]In this embodiment, the glass used is the glass that has been coated with ITO film. The fluorescent luminescent material adopts the red fluorescent luminescent material DCJTB (provided by China Reagent Network). First, according to the method of the nano-metal particle layer in Example 1, a nano-metal particle layer on the ITO glass is obtained, and the metal layer has a nano-metal structure. Mix polymethyl methacrylate PMMA evenly with chlorobenzene to obtain a 20% PMMA-chlorobenzene solution. DCJTB was added to the above solution to obtain a mass percentage of DCJTB dye of 0.5 wt%. Then, a fluorescent light-emitting layer of DCJTB-PMMA with a thickness of 2 μm was coated on the glass with the nano-metal particle layer by a spin coating method.

[0041] Such as Figure 4 As shown, followed by vacuum evaporation method, vacuum evaporation hole transport layer NPB 35nm, blue light emitting layer TBADN: 3%DSA-ph 15nm, electron transport layer TPBi 40nm and cathode elect...

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Abstract

Provided is a method for preparing an OLED light-emitting device with a metal-enhanced fluorescence outer conversion layer. The invention provides a preparing method for a metal-enhanced fluorescence layer and an OLED device based on the method. The preparing method for the metal-enhanced fluorescence light-emitting layer includes the following steps of firstly, preparing a nanometer metal particle layer, wherein the nanometer metal particle layer is obtained by forming a metal film through vacuum evaporation and then conducting thermal treatment; secondly, preparing an organic fluorescence material solution, and evenly mixing the fluorescence material in high-molecular polymers; thirdly, preparing the metal-enhanced fluorescence outer conversion layer. The structure is prepared on the outer side of glass of an OLED, surface plasmas are formed on light waves emitted by the OLED device and metal nanometer particles on the outer side of the glass through the structure, and therefore the luminous intensity of fluorescent molecules is enhanced through the strong partial enhancing characteristic of the surface plasmas, the photoluminescence of the metal-enhanced fluorescence outer conversion layer of the OLED device is greatly enhanced. The OLED device with the metal-enhanced fluorescence outer conversion layer is simple in preparation process, low in device requirement and short in preparation cycle.

Description

technical field [0001] The invention relates to the technical field of OLED illumination and display, in particular to a method for preparing an OLED light-emitting device with a metal-enhanced fluorescent outer conversion layer. Background technique [0002] Metal-enhanced fluorescence is generally prepared by chemical methods. In chemical methods, the preparation process is complicated, and quenching of metal nanoparticles and fluorescent molecular groups is prone to occur, thereby reducing the effect of metal-enhanced fluorescence. Therefore, improved methods are needed to solve the problem of easy quenching of metal nanoparticles and fluorescent molecular groups. At the same time, the metal-enhanced fluorescence effect has been widely used in LED devices, OLED devices, sensors and so on. Especially in OLED devices, the metal-enhanced fluorescence effect has been applied inside OLED devices, which can improve the electroluminescence intensity and luminous efficiency in O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/56
CPCH10K50/12H10K2102/00H10K71/00
Inventor 朱文清汤梅孙亮亮钱冰洁肖腾俞静婷
Owner SHANGHAI UNIV
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