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Organic light-emitting device and light extraction assembly thereof

An organic light-emitting device and light-extracting layer technology, which is applied in the manufacturing of electric solid-state devices, semiconductor devices, semiconductor/solid-state devices, etc., can solve the problems affecting the life of OLED devices and the limited improvement of OLED light-extraction efficiency, and achieve excellent luminous efficiency. , Good blocking water and oxygen, long service life

Active Publication Date: 2017-11-17
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can improve the light extraction efficiency of OLED to a certain extent, because the accumulation of spherical molecules cannot form a dense film, the improvement of the OLED light extraction efficiency is limited, and it affects the life of the OLED device.

Method used

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  • Organic light-emitting device and light extraction assembly thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment is an organic light-emitting device, and its structural schematic diagram is as follows figure 1 As shown, the light extraction components used include:

[0034] An ITO substrate provided with a reflective anode;

[0035] A hole injection layer (HIL) deposited on an ITO substrate;

[0036] a hole transport layer (HTL) deposited over the hole injection layer;

[0037] An emissive layer (EML) deposited on top of the hole transport layer;

[0038] An electron transport layer (ETL) deposited on top of the emissive layer;

[0039] a translucent cathode deposited on top of the electron transport layer;

[0040] A light extraction layer deposited on the translucent cathode, and an encapsulation cover plate on the light extraction layer.

[0041] The above-mentioned light extraction layer includes:

[0042] The first light extraction layer deposited on the translucent cathode is made of spherical molecular material C60;

[0043] The second light extractio...

Embodiment 2

[0058] This embodiment is an organic light-emitting device, its structure and preparation method are similar to Embodiment 1, the difference is that its light extraction layer includes:

[0059] The first light extraction layer deposited on the translucent cathode is made of spherical molecular material C70;

[0060] The second light extraction layer deposited on the first light extraction layer is made of planar organic molecule TPBI and inorganic metal oxide V 2 o 5 , where the inorganic metal oxide V 2 o 5 The doping ratio is 90%;

[0061] The third light extraction layer deposited on the second light extraction layer is made of inorganic metal oxide WO 3 .

Embodiment 3

[0063] This embodiment is an organic light-emitting device, its structure and preparation method are similar to Embodiment 1, the difference is that its light extraction layer includes:

[0064] The first light extraction layer deposited on the translucent cathode is made of spherical molecular materials, specifically C70 and C60 with a weight ratio of 1:1;

[0065] The second light extraction layer deposited on the first light extraction layer is made of planar organic molecule mCP and inorganic metal oxide WO 3 , where the inorganic metal oxide WO 3 The doping ratio is 10%;

[0066] The third light extraction layer deposited on the second light extraction layer is made of inorganic metal oxide WO 3 .

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Abstract

The invention relates to an organic light-emitting device and a light extraction assembly thereof. The organic light-emitting device is provided with a cathode and the light extraction assembly used thereby comprises: a first light extraction layer deposited on the cathode and made of a spherical molecular material; a second light extraction layer deposited on the first light extraction layer and made of a planar organic molecule and an inorganic metal oxide; a third light extraction layer deposited on the second light extraction layer and made of inorganic metal oxide. The light extraction assembly can simultaneously improve and optimize the OLED light output rate and device lifetime.

Description

technical field [0001] The invention relates to the technical field of displays, in particular to an organic light-emitting device and a light extraction component thereof. Background technique [0002] Organic light-emitting devices, namely organic light-emitting diodes (OLEDs), have broad application prospects in display, lighting and other fields due to their active light emission, wide viewing angle, fast response speed, light weight, adjustable color, and flexibility. extensive attention. The parameters to measure the luminous performance of organic light-emitting diodes mainly include: external quantum efficiency, current efficiency, driving voltage, device life, and color purity, wherein the current efficiency is directly proportional to the external quantum efficiency. How to improve the external quantum efficiency of the device is the key to improving the light-emitting performance of organic light-emitting diodes. [0003] The external quantum efficiency (ηext) o...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/54
CPCH10K85/00H10K50/85H10K50/858
Inventor 余磊宋晶尧付东
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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