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Flexible micromolecule OLED

A small molecule, flexible technology, applied in the field of organic electroluminescent display devices, can solve the problems of poor solubility and complex processing technology, and achieve the effects of improving luminous efficiency and life, simplifying processing technology, and facilitating printing processing technology

Inactive Publication Date: 2014-08-27
JIANGSU SHENGMEI IND TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the disadvantages of poor solubility of small molecule phosphorescent materials in the prior art and complicated processing technology, the present invention provides a flexible small molecule OLED, and a high triplet phosphorescent small molecule light-emitting host with particularly good solubility is introduced into the light-emitting layer. The materials host1, host2 and the dye compound dopant matched with the host material can be used in an appropriate proportion to improve the solubility of small molecules in solvents, and can be produced by ink processing technology

Method used

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  • Flexible micromolecule OLED
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Experimental program
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Effect test

Embodiment 1

[0023] A flexible small molecule OLED, including a cathode, a light emitting layer and an anode, the high triplet phosphorescent small molecule host material host1 of the light emitting layer ink is SPPO21 and the structural formula is The main material host2 is 26DCzPPy and the structural formula is The dye compound dopant is FIrpic structural formula is The ratio of host material to dye concentration is: host1:host2:dopant7:7:4.

[0024] The hole injection layer contains PEDOT:PSS (poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid)) and surface active dopants. The mass proportion of PEDOT:PSS is 1:20; the proportion of PEDOT:PSS to the total mass of the hole injection layer coating is 99%, and the average size of PEDOT:PSS particles is 25-35nm; the type of surfactant is non-ionic Surfactants, such as nonionic fluorosurfactants, for example, DuPont's FS-300. Its proportion to the total mass of the hole injection layer coating is 0.4%-0.44%.

[0025] The hole...

Embodiment 2

[0027] A flexible small molecule OLED, including a cathode, a light-emitting layer and an anode, the light-emitting layer contains host materials host1, host2 are NP3PPO structural formula: and the structure of CzBDF is The dye compound dopant adopts the structural formula of Ir(ppy)2(acac) as The mass ratio of the high triplet phosphorescent compound to the dye compound in the total mass of the light-emitting layer coating is 3:3:1.

[0028] The hole injection layer contains PEDOT:PSS and surface active dopants. The mass proportion of PEDOT:PSS is 2:5; The ratio of PEDOT:PSS to the total mass of the hole injection layer coating is 99.5%; the type of surfactant is nonionic surfactant, such as nonionic fluorosurfactant , for example, DuPont's FS-300. The ratio of it to the total mass of the hole injection layer coating is 0.4%-0.44%, and the average size of PEDOT:PSS particles is 25-35nm.

[0029] The hole transport layer, the hole transport layer contains

Embodiment 3

[0031] A flexible small molecule OLED comprises a cathode, a light emitting layer, a hole transport layer, a hole injection layer and an anode. The anode is a 30×30mm2 PET plate coated with silver nanowires with a thickness of 100nm. The cathode material is LiF / Al, and the thicknesses are 1nm / 100nm respectively.

[0032] The light-emitting layer contains host1 as PPO21 with a structural formula of The structural formula of host2 is 35DCzPPy Described dopant is FCNIrPic structural formula is The mass ratio of the high triplet phosphorescent compound to the dye compound in the total mass of the light-emitting layer coating is 5:5:2. The thickness of the light emitting layer is 80nm.

[0033] The hole injection layer contains PEDOT:PSS and surface active dopants. The mass proportion of PEDOT:PSS is 1:15; The ratio of PEDOT:PSS to the total mass of the hole injection layer coating is 99%; the average size of PEDOT:PSS particles is 25-35nm; the solution surfactant is 3,4 -...

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Abstract

The invention disclose a flexible micromolecule OLED which is composed of a cathode, an organic function layer and an anode. The organic function layer at least comprises a light-emitting layer, and the light-emitting layer comprises at least one high triplet state phosphorescence compound and a dye compound matched with the high triplet state phosphorescence compound. Raw materials of the high triplet state phosphorescence compound at least comprises a compound which contains a spirobifluorene group and is recorded as a body material host 1. The dye compound ate least comprises a green ray or red ray iridium complex which contains a pyridine group and is recorded as dopant. The flexible micromolecule OLED can be prepared with an ink-jet printing technological device.

Description

technical field [0001] The invention relates to an organic electroluminescence display device (Organic Electroluminesence Display, OLED), in particular to a flexible small molecule OLED. Background technique [0002] As a new generation of display technology, organic electroluminescent display technology, compared with the current mainstream liquid crystal display technology, has ultra-thin, active light, high brightness, high contrast, wide viewing angle, fast response, high luminous efficiency, and good temperature adaptability , simple production process, low driving voltage, low energy consumption, bendable and foldable, etc., have attracted widespread attention from the industry, and are considered to be one of the most competitive new generation flat panel display technologies, and have become the focus of today's flat panel display technology research. popular. [0003] Organic electroluminescent display OLED can be divided into two types according to the light-emitt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K85/623H10K85/624H10K50/11
Inventor 任茂胜刘腾蛟范江峰
Owner JIANGSU SHENGMEI IND TECH GRP