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Spirofluorene cyclic compound, application thereof and organic electroluminescence device adopting same

A technology of cyclic compounds and compound structures, which is applied in the field of thermally activated delayed fluorescent materials and organic electroluminescent devices, can solve the problems of large efficiency roll-off, achieve the effects of avoiding efficiency roll-off, avoiding accumulation, and improving luminous efficiency

Active Publication Date: 2018-06-05
BEIJING ETERNAL MATERIAL TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Up to now, the device performance based on TADF materials still has a large gap compared with traditional phosphorescent materials, especially for blue light devices, there is a large efficiency roll-off problem

Method used

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  • Spirofluorene cyclic compound, application thereof and organic electroluminescence device adopting same
  • Spirofluorene cyclic compound, application thereof and organic electroluminescence device adopting same
  • Spirofluorene cyclic compound, application thereof and organic electroluminescence device adopting same

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0020] The invention discloses a spirofluorene ring compound, the structure of which is shown in formula (I):

[0021]

[0022] Among them, D 1 ~D 6 are independently hydrogen or electron-donating groups, and cannot be hydrogen at the same time; the electron-donating groups are independently selected from substituted or unsubstituted C 2 ~C 30 the first heteroaryl;

[0023] A 1 ~A 6 are independently hydrogen or electron-withdrawing groups, and cannot be hydrogen at the same time; the electron-withdrawing groups are independently selected from fluorine atoms, cyano groups, substituted or unsubstituted C 2 ~C 30 The second heteroaryl.

[0024] As preferred, substituted or unsubstituted C 2 ~C 30 In the first h...

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Abstract

The invention relates to a spirofluorene cyclic compound, application thereof and an organic electroluminescence device adopting the spirofluorene cyclic compound. The spirofluorene cyclic compound has a structure shown in the following formula (I), wherein D1-D6 are hydrogen or an electro-donating group independently and can not be hydrogen at the same time; and the electron-donating group is independently selected from a substituted or unsubstituted C2-C30 first heteroaryl; A1-A6 are hydrogen or an electron withdrawing group independently and can not be hydrogen at the same time; and the electron withdrawing group is independently selected from a fluorine atom, a cyano group and a substituted or unsubstituted C2-C30 second hetero arcyl. The spirofluorene cyclic compound provided by the invention has smaller deltaE(S1-T1), and thermally activated delayed fluorescence can be easily realized. (The formula (I) is described in the specification.).

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, and more specifically, relates to a spirofluorene ring compound, its use in preparing organic electroluminescent devices, thermally activated delayed fluorescent materials and organic electroluminescent devices using the same. Background technique [0002] The earliest dyes used in OLEDs are pure organic small molecule light-emitting materials. Devices based on such materials have long life and low efficiency roll-off. However, the material can only use 25% of S1 to emit light, and 75% of T1 can only be lost through non-radiative transitions due to spin prohibition. In 1998, Forrest et al. from Princeton University reported for the first time PHOLEDs based on T1 emission. Utilizing the spin-orbit coupling effect caused by the heavy metal Pt atoms, T1 can emit light effectively at room temperature, so that the internal quantum efficiency of 100% can be theoretically achieved....

Claims

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Application Information

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IPC IPC(8): C07C255/58C07D279/22C07D209/86C07D401/10C07D401/14C07D413/10C07D413/14C07D417/10C07D417/14C07F9/6568C07F9/6533C07D471/04C07D213/16C07D487/04C07D265/38C07D409/10C07D209/56C07F5/02C07D239/26C07D405/14C07D409/14C07D403/14C07D403/10C07C211/56C09K11/06H01L51/54
CPCC09K11/06C07C211/56C07C255/58C07D209/56C07D209/86C07D213/16C07D239/26C07D265/38C07D279/22C07D401/10C07D401/14C07D403/10C07D403/14C07D405/14C07D409/10C07D409/14C07D413/10C07D413/14C07D417/10C07D417/14C07D471/04C07D487/04C07F5/027C07F9/65335C07F9/65685C09K2211/1074C09K2211/1096C09K2211/1088C09K2211/1092C09K2211/1014C09K2211/1007C09K2211/1011C09K2211/1029C09K2211/1044C09K2211/1033C09K2211/1037H10K85/624H10K85/649H10K85/656H10K85/615H10K85/654H10K85/633H10K85/6576H10K85/6574H10K85/6572
Inventor 高文正范洪涛邵爽任雪艳
Owner BEIJING ETERNAL MATERIAL TECH
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