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Green-emission iridium phosphors complex and preparation method thereof

A technology of phosphorescent complexes and synthesis methods, applied in the field of synthesis of electrophosphorescent materials for organic light-emitting diodes

Inactive Publication Date: 2015-05-20
KUNMING INST OF PRECIOUS METALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The maximum emission wavelength and luminous efficiency of the iridium phosphorescent complex can be adjusted by changing the structure of the cyclometal ligand and the auxiliary ligand. The current research is mainly focused on the structural modification of the cyclometal ligand, and there is no evidence based on 2,2,6 ,Report of this kind of iridium phosphorescent complexes with 6-tetramethylgenandione as ancillary ligand

Method used

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  • Green-emission iridium phosphors complex and preparation method thereof
  • Green-emission iridium phosphors complex and preparation method thereof
  • Green-emission iridium phosphors complex and preparation method thereof

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Experimental program
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Embodiment Construction

[0014] (1) Dimer (dppy) 2 Ir 2 Cl 2 (dppy) 2 Synthesis

[0015] Add 16.33g (70.7mmol) dppy to a 500mL round bottom flask, dissolve it in 120mL ethylene glycol monoethyl ether, then add 9.96g (28.3mmol) iridium trichloride and 80mL deionized water, repeatedly charge and discharge N 2 After three times, N 2 Under atmosphere, it was heated to reflux at 120°C for 24h, and the mixture was cooled to room temperature. After filtration, the filter cake was washed with 30 mL of acetone, 40×2 mL of water, and 30×2 mL of acetone, and dried in vacuum to obtain 17.3 grams of crude product, which was directly used in the next reaction.

[0016] (2) Complex Ir(dppy) 2 Synthesis of (tmd)

[0017] 8.38g (6.09mmol) iridium chloride bridge dimer (dppy) 2 Ir 2 Cl 2 (dppy) 2 Add to a 250mL three-necked bottle, add 3.23g (30.5mmol) of anhydrous Na 2 CO 3 and 210mL ethylene glycol monoethyl ether, and add 5.6g (30.4mmol) 2,2,6,6-tetramethyl-3,5-heptanedione, repeatedly charge and discha...

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Abstract

The invention discloses a green-emission iridium phosphors complex and a preparation method thereof. The iridium phosphors complex is that 2-(xenyl) pyridine is used as a cyclometalated ligand, and 2, 2, 6, 6-tetramethyl-3, 5-heptadione (tmd) is used as an auxiliary ligand; the maximum emission wavelength of (Ir(bppy)2(tmd)) is 533nm, which is the typical green-light emission wavelength; iridium chloride hydrate is used as a raw material to synthesize iridium-chloride bridged dimer (dppy)2Ir2Cl2(dppy)2 which reacts with tmd under an alkaline condition to obtain (Ir(bppy)2(tmd)); and the yield is up to 85%, and the purity is up to 99.5%.

Description

technical field [0001] The invention relates to the technical field of synthesis of electrophosphorescent materials for organic light-emitting diodes (OLEDs), in particular to a green light-emitting iridium phosphorescent complex and a preparation method thereof. Background technique [0002] OLED has the characteristics of high contrast, ultra-thin, wide viewing angle, low energy consumption, fast response, colorful, flexible, etc. It is regarded as the latest generation of "green energy-saving" display technology and the most competitive new generation of solid-state light source. [0003] Luminescent material is one of the core key materials of OLED, and its luminescent performance directly determines the performance of OLED devices. In the development of OLEDs, phosphorescent complexes are introduced into the light-emitting layer of OLEDs as light-emitting materials, so that the maximum internal quantum efficiency of the device is increased from 25% of the original fluor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00H01L51/54
CPCC09K11/06C07F15/0033C09K2211/185H10K85/342
Inventor 常桥稳李杰刘伟平姜婧晏彩先叶青松余娟陈家林
Owner KUNMING INST OF PRECIOUS METALS
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