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Polymer material for electroluminescent device and its preparing method

A technology of electroluminescent devices and polymer materials, applied in the directions of luminescent materials, chemical instruments and methods, etc., can solve the problems of poor film-forming properties, unbalanced electron and hole injection and transport properties, and poor stability, etc.

Inactive Publication Date: 2004-12-15
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, these polymer electroconductive materials still generally have problems such as unbalanced electron and hole injection and transport performance, poor stability, and poor film-forming properties.

Method used

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  • Polymer material for electroluminescent device and its preparing method
  • Polymer material for electroluminescent device and its preparing method
  • Polymer material for electroluminescent device and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add hydrazine hydrate to the fluorene-benzene alternating copolymer I in methanol, reflux for 16 hours under the protection of nitrogen, pour water after the reaction is completed, then extract with ethyl acetate, and rotary evaporate to obtain a white solid;

[0039] Dissolve the above white crystals and benzoyl chloride in pyridine. The reaction was refluxed under the protection of nitrogen, returned to room temperature at the end, the reaction product was poured into ethanol, and frozen to obtain a flaky white solid;

[0040] Add SOCl to the above flaky white solid 2 , and then refluxed for 5h under the protection of nitrogen. the excess SOCl 2After evaporation, the residue was poured into water to obtain a crude product, which was purified to obtain a fluorene-benzene alternating copolymer (P-1) with 1,3,4-oxadiazole-benzene flanking it.

[0041] The original polymer 1 is an electroluminescent material with good luminescence performance, but its electron injectio...

Embodiment 2

[0044] Others are the same as in Example 1, add hydrazine hydrate to the polymer I in methanol, reflux for 16h under nitrogen protection, pour water into after the reaction is finished, then extract with ethyl acetate, and spin evaporate to obtain a white solid;

[0045] Take the above-mentioned white crystal and a fluorene polymer (f=3) with an acid chloride at one end, wherein the substituent at position 9 is -C 8 h 17 ) added to pyridine. Reflux the reaction under the protection of nitrogen, and return to room temperature at the end, pour the reaction product into ethanol, and freeze to obtain a white solid; add SOCl to the white solid 2 , and then refluxed for 5h under the protection of nitrogen. the excess SOCl 2 Evaporated off, the residue was poured into water to obtain a crude product, which was purified to give the product as a fluorene-benzene alternating copolymer (P-2) with 1,3,4-oxadiazole and oxadiazole-benzene as side linkages.

[0046] Compared with polymer...

Embodiment 3

[0049] Others are the same as in Example 2, the degree of polymerization of the fluorene polymer with acid chloride at one end is f=6.

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Abstract

The present invention relates to a kind of polymer material for electroluminescent device and its preparation process. Conjugate or non-conjugate polymer is further modified, i.e., original radical in the polymer is utilized or new radical is introduced to the polymer for reaction with other matter, to obtain new polymer material with excellent electroluminescent performance or carrier transferring performance. Thus prepared polymer material has high molecular weight, excellent heat stability and excellent machining and filming performance, and ma ybe used widely in organic FET, organic electroluminescent LED, organic voltaic cell, organic laser, organic light conducting fiber, chemical and biological sensor and other fields.

Description

technical field [0001] The present invention relates to a method for preparing a polymer material for an electroluminescent device and the method for preparing a polymer material for an electroluminescent device. Background technique [0002] Organic electroluminescent materials are mainly organic small molecules or polymers with certain conjugated structures. Since Pope et al first discovered the phenomenon of electroluminescence of organic material single crystal anthracene in 1963 (J.Chem.Phys., 38, 2042 (1963)), Helfinch and Schneider also successfully observed in solution in 1965 To quite strong electroluminescence phenomenon (Phys.Rev.Lett., 1965,14,229); in U.S.Pat.Nos. 2902; J.Chem.Phys., 1973,58,1542; and Chem.Phys.Lett., 1975,36,345) reported many hosts containing conjugated structures and activators containing conjugated structures composed of Electroluminescence of organic materials. The main body includes naphthalene, anthracene, phenanthrene, naphthacene, py...

Claims

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Application Information

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IPC IPC(8): C09K11/06
Inventor 黄维冯嘉春
Owner FUDAN UNIV
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