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Dual-functional monophosphine oxide substituted fluorenyl photoelectric functional material and preparation method as well as application thereof

A photoelectric functional material and oxygen substitution technology, which is applied in the direction of luminescent materials, chemical instruments and methods, circuits, etc., can solve the problems of transmission balance and high triplet energy level blue light emission that cannot be satisfied at the same time, and achieve the improvement of material carrier Transmission performance, good polarization effects

Inactive Publication Date: 2013-02-06
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the carrier injection and transport balance of the blue light material, the high triplet energy level and the blue light emission cannot be satisfied at the same time, and to provide a bifunctional monophosphine oxide substituted fluorenyl photoelectric functional material and its preparation method and application

Method used

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  • Dual-functional monophosphine oxide substituted fluorenyl photoelectric functional material and preparation method as well as application thereof
  • Dual-functional monophosphine oxide substituted fluorenyl photoelectric functional material and preparation method as well as application thereof
  • Dual-functional monophosphine oxide substituted fluorenyl photoelectric functional material and preparation method as well as application thereof

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specific Embodiment approach 1

[0028] Specific Embodiment 1: The structure of the bifunctional monophosphine oxide substituted fluorenyl photoelectric functional material in this embodiment is as follows:

[0029]

[0030] Among them, R is

[0031] In this embodiment, the aromatic monophosphineoxyphenyl fluorene is used as the core, and the 2 and 7 positions of the hole transport group are modified to form a class of fluorenyl aromatic phosphineoxy photoelectric materials with bipolar properties.

[0032] The aromatic phosphine group in this embodiment has a unique effect of breaking conjugation, which can effectively maintain a higher triplet state energy level and deep blue light emission of the material; has a good polarization effect, and can effectively improve the carrier transport performance of the material .

[0033] Specifically, Embodiment 2: The preparation steps of the preparation method of the bifunctional monophosphine oxide substituted fluorenyl photoelectric functional material in t...

specific Embodiment approach 3

[0042] Embodiment 3: This embodiment differs from Embodiment 2 in that the eluent described in Step 1 and Step 2 is formed by mixing petroleum ether and ethyl acetate in a volume ratio of 1:2. Others are the same as in the second embodiment.

specific Embodiment approach 4

[0043] Embodiment 4: The difference between this embodiment and Embodiment 2 or 3 is: 2,7-dibromo-9-phenyl-9-diphenylphosphineoxyphenylfluorene and carbonic acid described in step 2 The molar ratio of potassium is 1:2. Others are the same as the second or third specific embodiment.

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Abstract

The invention discloses a dual-functional monophosphine oxide substituted fluorenyl photoelectric functional material and a preparation method as well as application thereof, relating to an organic photoelectric functional material and a preparation method as well as application thereof, and aiming at solving the problem that carrier injection and transport balance, high-triplet-state energy level and blue light emission of a blue-light emitting material cannot be met simultaneously. The dual-functional monophosphine oxide substituted fluorenyl photoelectric functional material has a structure shown in the specification. The preparation method comprises the following steps of: modifying sites 2 and 7 of fluorene by groups with hole transport performance by taking aromatic monophosphine oxide phenyl monomer as a core; and synthesizing a series of ternary fluorenyl aromatic monophosphine oxide photoelectric materials with bipolar characteristic. The dual-functional monophosphine oxide substituted fluorenyl photoelectric functional material is applied to an organic electroluminescent blue light-emitting device. According to the invention, the sites 2 and 7 are modified by different hole transport groups, and the excitation state energy level of the core is regulated and controlled, so that the ternary high-efficiency organic blue light-emitting functional material with bipolar carrier transport performance is constructed.

Description

technical field [0001] The invention relates to an organic photoelectric functional material and its preparation method and application, in particular to a class of ternary organic phosphineoxyfluorene derivatives with bipolar properties and its preparation method and application. Background technique [0002] Organic light-emitting diodes (OLEDs), which have attracted extensive attention due to their great advantages in energy saving and environmental protection, are considered to be one of the effective ways to realize high-efficiency flat-panel display backlights and next-generation large-area solid-state lighting. [0003] At present, the red and green primary color materials of organic light-emitting diodes (OLEDs) have basically met the requirements of industrialization in terms of luminous efficiency and stability. However, the development of high-efficiency blue-light materials and devices is slow, mainly due to the lack of blue-light phosphor materials and blue-ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/53C07F9/572C09K11/06H01L51/54H01L51/56
Inventor 许辉于东慧
Owner HEILONGJIANG UNIV
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