The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 2022
Filed:
Jan. 30, 2019
Ningbo Lumilan Advanced Materials., Ltd., Ningbo, CN;
NINGBO LUMILAN ADVANCED MATERIALS CO., LTD., Ningbo, CN;
Abstract
The invention relates to a 9,10-dihydro-acridine derivative having a structure of Formula (I). The HOMO and LUMO levels of the 9,10-dihydro-acridine derivative are distributed on different electron donating and electron withdrawing groups, such that the HOMO and LUMO levels are separated, achieving a small ΔE. The 9,10-dihydro-acridine derivative can be used as a TADF material in an organic light-emitting device. The dihydro-acridinyl group in the electron donating group is linked to a dibenzoheterocyclic ring. Introducing modifying groups allows adjustment of triplet and singlet energy levels of the compound, enabling the TADF material to have a high luminescence efficiency in blue and deep blue regions. The invention also relates to an organic light-emitting device having at least one functional layer containing the 9,10-dihydro-acridine derivative. When the compound is used as a guest luminescent material in a light emitting layer, an OLED device of high blue light emitting efficiency is obtained.