US 2020/0006669 A1 · FUSED CYCLIC COMPOUND, AND PREPARATION METHOD AND USE THEREOF

Abstract

The invention relates to a fused cyclic compound having a structure of Formula compound by controlling conjugation of aromatic and heterocyclic rings. The electron transport performance balances while hole performance of the fused cyclic compound improves. The compound has high triplet energy level and glass transition temperature. The material molecule isn't prone to crystallization. The compound ensures transfer of energy to a guest material. Adjusting substituents improves electron and hole transport performances, reducing the difference between energy levels, broadening the recombination region of carriers, and preventing triplet-triplet exciton annihilation. The invention also relates to an organic light-emitting device having at least one functional layer containing the fused cyclic compound used as a host material in a light emitting layer. The energy level of the light emitting layer becomes matched with that of the carrier transport layers, reducing the driving voltage of the device while increasing luminescence efficiency of the device.

Claims15

Dependent claims

A fused cyclic compound, having a structure of Formula (I) or (II):

wherein X1 is selected from N or C—R1a, X2 is selected from N or C—R2a, X3 is selected from N or C—R3a, X4 is selected from N or C—R4a, X5 is selected from N or C—R5a, X6 is selected from N or C—R6a, and X7 is selected from N or C—R7a, in which
R1a-R7a are each independently selected from hydrogen, halo, cyano, alkyl, alkenyl, alkynyl, cycloalkyl, alkoxy, silyl, aryl or heteroaryl;
R1, and R2 are each independently selected from hydrogen, halo, cyano, alkyl, alkenyl, alkynyl, cycloalkyl, alkoxy, silyl, aryl or heteroaryl;
L is a single bond, a C1-C10 substituted or unsubstituted aliphatic hydrocarbon group, a C6-C60 substituted or unsubstituted aryl group, or a C3-C30 substituted or unsubstituted heteroaryl group;
and
Art is selected from hydrogen, halo, cyano, alkyl, alkenyl, alkynyl, cycloalkyl, alkoxy, silyl, aryl or heteroaryl, in which
the heteroaryl has at least one heteroatom independently selected from nitrogen, sulfur, oxygen, phosphorous, boron or silicon.

4 more elements

Dependencies are inferred from the claim text.

Fused cyclic compound, and preparation method and use thereof

Life of this patent

Fused cyclic compound, and preparation method and use thereof

Life of this patent

Abstract

Claims15