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Terbium compound electroluminous material and device

A technology of complexes and ligands, applied in the direction of luminescent materials, chemical instruments and methods, organic chemistry, etc., can solve the problems that are not comparable to others, and achieve the effect of good electron transport performance and excellent electroluminescence performance

Inactive Publication Date: 2004-10-06
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After introducing hole transport material TPD, hole injection material MTDATA and hole blocking material TAZ (the structural formulas of MTDATA and TAZ are shown in the figure below), the following devices were fabricated: ITO / MTDATA(7.5nm) / TPD(40nm) / [Tb(tb-PMP) 3 TPPO](34nm) / TAZ(60nm) / Mg:Al, its highest brightness is 2000 cantera per square meter (cd / m 2 ), the highest power efficiency is 2.4 lumens per watt when the voltage is 16 volts, but the brightness at this time is only 70 canteras per square meter [S.Capecchi, O.Renault, D-G.Moon et al., Advanced Materials, Vol.12 (21), 1591-1594, 2000], its performance is far inferior to other small molecules

Method used

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  • Terbium compound electroluminous material and device
  • Terbium compound electroluminous material and device
  • Terbium compound electroluminous material and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1: Synthesis of ligand 3-methyl-1-phenyl-4-(2-ethylbutyryl)pyrazolin-5-one (eb-PMP)

[0079] In a dry three-necked flask, add 7.5 g (0.05 mol) of 3-methyl-1-phenylpyrazolin-5-one and 100 ml of anhydrous 1,4-dioxane, heat and stir until dissolved, add 9 The powder of gram (0.18 mol) calcium hydroxide and 1 gram (0.03 mol) barium hydroxide was cooled to room temperature, 8 ml of 2-ethylbutyryl chloride (0.058 mol) was added dropwise, and the reaction was stirred and refluxed for 18 hours. The reaction mixture was poured into 350 ml of deionized water containing 15 ml of concentrated hydrochloric acid, and a red oil was precipitated, extracted with chloroform, washed with deionized water until nearly neutral, dried over anhydrous sodium sulfate for 24 hours, and the obtained liquid was rotary evaporated to dryness, Using petroleum ether:ethyl acetate (20:1) as the eluent, it was separated and purified by silica gel column to obtain 9.6 g of pink oily product with a y...

Embodiment 2

[0081] Example 2: Synthesis of ligand 3-methyl-1-phenyl-4-(2-ethylhexanoyl)pyrazolin-5-one (eh-PMP)

[0082] The synthesis method is the same as in Example 1, but 2-ethylhexanoyl chloride is used instead of 2-ethylbutyryl chloride.

[0083] 1 H-NMR (400 Hz, CDCl 3 )δ: 7.87(2H); 7.45(2H); 7.28(1H); 2.90(1H); 2.48(3H); 1.63(4H); 1.50(4H); 0.94(6H).

Embodiment 3

[0084] Example 3: Synthesis of ligand 3-methyl-1-phenyl-4-(2-tert-butylacetyl)pyrazolin-5-one (te-PMP)

[0085] Following the same procedure as Example 1, but substituting 3,3-dimethylbutyryl chloride for 2-ethylbutyryl chloride, to prepare 3-methyl-1-phenyl-4-(tert-butylacetyl)pyridine oxazolin-5-one (te-PMP). The crude product of this product can be purified by recrystallization from ethanol. Melting point 89-90 ℃.

[0086] 1 H-NMR (400 Hz, CDCl 3 )δ: 7.87(2H); 7.45(2H); 7.28(1H); 2.62(2H); 2.48(3H); 1.86(4H); 1.12(9H).

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Abstract

An electroluminescent material Tb(L1)3(L2)n is disclosed, where Tb is three-valence positive ion of Tb, Li is the organic chelating negative ion of pyrazolinone and L2 is neutral ligand. The device prepared from it is also disclosed. Their advantages are high brightness and high efficiency.

Description

technical field [0001] The invention relates to organic electroluminescence in the field of light-emitting materials, in particular to a series of pyrazolone ligands, complexes of the ligands and rare earth element terbium, application of the complexes as electroluminescent materials, and use of the complexes A device made as a luminescent material. Compared with the existing rare earth complex electroluminescent materials and devices, the electroluminescent materials and devices of the present invention have the excellent characteristics of high brightness and good efficiency. technical background [0002] At present, most of the color displays used by people are kinescope displays or liquid crystal displays. The former is large in size, slow in response and low in efficiency. Compared with the former, the latter is smaller in size and can realize flat-panel display. Small, slow response, complex process, still can not meet people's needs. In 1987, Deng Qingyun (C.W.Tang)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D231/22C09K11/77
Inventor 黄春辉辛颢李富友卞祖强
Owner PEKING UNIV
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