1,3,6,8-tetraaryl-9-alkyl substituted carbazole derivative and application thereof in luminescent diode

A technology of carbazole derivatives and tetraaryl groups, which is applied in a class of 1,3,6,8-tetraaryl-9-alkyl substituted carbazole derivatives and its application in light-emitting diodes, can solve the problem of The external quantum efficiency is reduced to only one problem, and the effect of good solubility is achieved

Inactive Publication Date: 2008-02-20
SHENZHEN UNIV
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  • Abstract
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Problems solved by technology

However, the triplet excited state energy of CBP is only 2.56eV. If it is doped with a blue phosphorescent material with a high triplet excited state energy (>2.65eV), the phenomenon of returning energy to the main luminescent material will occur, making the external quantum of the device Efficiency drops to only (5.7±0.3)% [Appl.Phys.Lett., 79, 2082(2001)]

Method used

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  • 1,3,6,8-tetraaryl-9-alkyl substituted carbazole derivative and application thereof in luminescent diode
  • 1,3,6,8-tetraaryl-9-alkyl substituted carbazole derivative and application thereof in luminescent diode
  • 1,3,6,8-tetraaryl-9-alkyl substituted carbazole derivative and application thereof in luminescent diode

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Embodiment Construction

[0031] The synthetic route is shown in Figure 1.

[0032] (1) 9-Methylcarbazole

[0033] Add (10mmol) carbazole in the 50mL there-necked flask, fill with nitrogen for 30min, inject dimethyl sulfate (12mmol), 10ml DMSO, 85% potassium hydroxide (30mmol), 30mg triethylbenium ammonium chloride (TEBA), in After stirring for 6 hours under a nitrogen atmosphere, the reaction solution was poured into 100 mL of distilled water, filtered to obtain a white powder, and recrystallized with 95% ethanol to obtain white scaly crystals (1.72 g, yields: 95%)

[0034] (2) 9-Butylcarbazole

[0035] Add (10mmol) carbazole in the 50mL there-necked flask, fill with nitrogen for 30min, 10mLDMSO, 85% potassium hydroxide (30mmol), 30mg triethylammonium chloride (TEBA), n-butyl bromide (15mmol), potassium iodide (30mmol ), after stirring for 8 hours under a nitrogen atmosphere, the reaction solution was poured into 100mL distilled water, filtered to obtain a white powder, and recrystallized with ethan...

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Abstract

The invention discloses an electroluminescent material from near-ultraviolet to deep blue containing 9-alkly-1, 3, 6, 8-aryl used as substitute for carbazole derivative and a preparation method thereof. The structure of the invention can be expressed by element analysis, nuclear magnetic resonance spectrum and mass spectrum; the optical physic properties of the invention are studied by ultraviolet absorption spectrum and fluorescence spectrum; the application of the invention in organic light-emitting diodes is also studied. The experiment indicates that the compound has good dissolve performance and good heat stability; the light of near-ultraviolet or deep blue given out by solid powder and film has good color purity; the maximum wavelength of light is 390-440nm.

Description

Technical field: [0001] The present invention relates to a class of 9-alkyl-substituted-1,3,6,8-tetraaryl carbazole derivatives, their preparation method and their application as electroluminescent materials in organic flat display devices and their white light lighting devices . Background technique: [0002] In 1987, Eastern Kodak Company C.W.Tang et al. invented a sandwich structure device in the literature (C.W.Tang, S.A.Vanslyke Appl.Phys.Lett.1987, 51, 913) and the patent US4356429, which has high fluorescence efficiency, electron transport characteristics and The vacuum-coated 8-hydroxyquinoline aluminum (Alq3) and aromatic diamine (diamine) with hole transport properties can be used to make a uniform and dense high-quality film, and made into an organic EL device to make organic electroluminescence The research work on materials and devices has entered a practical era. In 1990, Friend et al. from the Cavendish Laboratory of the University of Cambridge reported the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06H05B33/14H01L51/54
Inventor 曾鹏举唐伟群牛芳芳刘亚伟向海峰牛憨笨
Owner SHENZHEN UNIV
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