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Compound with heteroanthrone-dibenzo five-membered heterocycle as core and organic electroluminescent device prepared from same

A five-membered heterocycle and compound technology, applied in the field of organic electroluminescence devices, can solve the problems of device efficiency roll-off, shortened lifespan, unbalanced holes and electrons in the light-emitting layer, etc. Significant effect of lifespan improvement

Pending Publication Date: 2021-12-31
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For phosphorescent OLEDs, the use of a single host in the light-emitting layer usually leads to an imbalance of holes and electrons, severe device efficiency roll-off and shortened lifetime at high current densities

Method used

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  • Compound with heteroanthrone-dibenzo five-membered heterocycle as core and organic electroluminescent device prepared from same
  • Compound with heteroanthrone-dibenzo five-membered heterocycle as core and organic electroluminescent device prepared from same
  • Compound with heteroanthrone-dibenzo five-membered heterocycle as core and organic electroluminescent device prepared from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The synthesis of embodiment 1 compound 1:

[0066]

[0067] Add 0.01mol of intermediate D-1 and 0.012mol of raw material E-1 to 120mL of toluene:ethanol=2:1 mixed solvent, add 0.02mol of potassium carbonate, add 0.0002mol of Pd(PPh 3 ) 4 , reacted at 110°C for 48 hours under a nitrogen atmosphere, took a sample and spotted the plate, after the reactants were completely reacted, cooled and filtered, the filtrate was rotary evaporated to remove the solvent, and the crude product was passed through a silica gel column to obtain compound 1;

[0068] Repeat the preparation process of Example 1 to synthesize the following target compounds; the reaction conditions are the same, except that intermediate D and raw material E listed in the following table 1 are used;

[0069] Table 1

[0070]

[0071]

[0072]

[0073]

[0074]

[0075] Wherein the synthetic route of intermediate D-1 is as follows:

[0076]

[0077] Intermediate D-1:

[0078] (1) Add 0.01...

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Abstract

The invention discloses a compound taking heteroanthrone-dibenzo five-membered heterocycle as a core and application of the compound, and belongs to the technical field of semiconductors. The structure of the compound is shown as a general formula (1). The compound provided by the invention has appropriate HOMO and LUMO energy levels, relatively high electron mobility and triplet state energy level (T1). The compound provided by the invention also has relatively high glass transition temperature and molecular thermal stability. Relatively high carrier mobility is ensured by relatively large planar rigid groups in molecules, and meanwhile, excessive aggregation of excitons can be effectively prevented and the local exciton concentration can be reduced by relatively large steric hindrance. The relatively large planar rigid groups and the relatively large steric hindrance act together to promote the recombination of carriers in a wide range and effectively inhibit EPA (exciton-polaron annihilation) and TTA (triplet state exciton-triplet state exciton annihilation). After the compound is applied to an OLED device, the voltage of the device can be effectively reduced, the luminous efficiency of the device can be improved, and the service life of the device can be prolonged.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a compound with a xanthone-connected dibenzo five-membered heterocyclic ring as the core and an organic electroluminescence device prepared therefrom. Background technique [0002] An organic electroluminescent device includes an anode, a cathode, and an organic functional layer including a light-emitting layer arranged between the anode and the cathode, wherein the organic functional layer is a general term for all layers between the cathode and the anode. Furthermore, there may be a hole transport region between the anode and the light emitting layer, and an electron transport region between the light emitting layer and the cathode. Holes from the anode can migrate to the light emitting layer through the hole transport region, and electrons from the cathode can migrate to the light emitting layer through the electron transport region. Carriers (for example, holes and el...

Claims

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Application Information

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IPC IPC(8): C07D407/04C07D405/14C07D471/04C07D491/048C07D491/147C07D487/06C07D519/00C07D409/04C07D471/22C09K11/06H01L51/50H01L51/54
CPCC07D407/04C07D405/14C07D471/04C07D491/048C07D491/147C07D487/06C07D519/00C07D409/04C07D471/22C09K11/06C09K2211/1033C09K2211/1088C09K2211/1092C09K2211/1048C09K2211/1029H10K85/622H10K85/6576H10K85/6574H10K85/6572H10K85/657H10K50/18H10K50/16H10K50/11
Inventor 殷梦轩陆颖曹旭东李崇
Owner JIANGSU SUNERA TECH CO LTD
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