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Title:
DIBENZOHETEROCYCLIC COMPOUND, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/155419
Kind Code:
A1
Abstract:
Disclosed is a dibenzoheterocyclic compound, wherein same has a structure as represented by formula (I). The dibenzoheterocyclic compound has a wide band gap between HOMO and LUMO energy levels, such that a light emission in a deep blue-light region can be achieved, and has a low LUMO level that is well matched with that of an electron transport layer so as to facilitate the injection and transport of electrons. The dibenzoheterocyclic compound has a good hole transport performance, and as a light-emitting layer material, same can balance the proportion of electrons to holes in the light-emitting layer to increase the recombination probability, so as to improve the light emission efficiency of a device. The spatial configuration of the dibenzoheterocyclic compound is capale of avoiding the stacking of material molecules, reducing exciton annihilation, and inhibiting efficiency roll-off. In addition, the dibenzo heterocyclic compound has a good thermal stability, and can achieve a highly efficient and stable blue-light emission. Also disclosed is an organic electroluminescent device, at least one functional layer of which contains the dibenzoheterocyclic compound, and a deep blue-light device having a high light emission efficiency and a low working voltage can be obtained.

Inventors:
WEI TING-WEI (CN)
DING HUANDA (CN)
ZHANG XIAOXIAO (CN)
CHEN ZHI-KUAN (CN)
Application Number:
CN2019/083656
Publication Date:
August 06, 2020
Filing Date:
April 22, 2019
Export Citation:
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Assignee:
NINGBO LUMILAN ADVANCED MAT CO LTD (CN)
International Classes:
C07F7/08; C09K11/06; H01L51/50; H01L51/54
Foreign References:
US20190071458A12019-03-07
CN109096125A2018-12-28
US20180175306A12018-06-21
US20180114929A12018-04-26
TW201125953A2011-08-01
Other References:
JOYCE Y.COREY ,MICHAEL DUEBER ,BLAKE BICHLMEIR: "Synthesis of dibenzo[b, f]silepins", JOURNAL OF ORGANOMETALLIC CHEMISTRY, vol. 26, no. 2, 16 January 1971 (1971-01-16), pages 167 - 173, XP055723940, DOI: 10.1016/S0022-328X(00)84767-1
Attorney, Agent or Firm:
SUNSHINE INTELLECTUAL PROPERTY INTERNATIONAL CO., LTD. (CN)
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