Electroluminescent device

Patent metadata

Field	Value
Publication number	US-12486236-B2
Application number	US-202117339222-A
Country	US
Kind code	B2
Filing date	Jun 4, 2021
Priority date	Jun 5, 2020
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

Provided is an electroluminescent device. The electroluminescent device includes an anode, a cathode and an organic layer disposed between the anode and the cathode, where the organic layer includes at least a first compound having a structure of H-L-E and a second compound having a general formula of M(L a ) m (L b ) n (L c ) q . The novel material combination consisting of the first compound and the second compound can enable the electroluminescent device to obtain a lower voltage, higher efficiency and an ultra-long lifetime and can provide better device performance. Further provided are a display assembly and a compound combination.

First claim

What is claimed is:

1 . An electroluminescent device, comprising:
an anode, a cathode, and an organic layer disposed between the anode and the cathode, wherein the organic layer comprises at least a first compound and a second compound; the first compound has a structure of H-L-E; H has a structure represented by Formula 1-a:

in Formula 1-a, A 1 , A 2 and A 3 are, at each occurrence identically or differently, selected from CR, and F 1 to F 10 are, at each occurrence identically or differently, selected from CR f ; and
E has a structure represented by Formula 2-d:

in Formula 2-d, Z 2 and Z 4 are each independently selected from CR z ;
L is selected from substituted or unsubstituted arylene having 6 to 30 carbon atoms, substituted or unsubstituted heteroarylene having 3 to 30 carbon atoms or a combination thereof;
R, R f and R z are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, a cyano group, a hydroxyl group, a sulfanyl group, and combinations thereof; and
adjacent substituents R, R f can be optionally joined to form a ring;
the second compound is a metal complex having a general formula of Ir(L a ) 2 (L b );
wherein,
L a and L b are a first ligand and a second ligand coordinated to the Ir, respectively; L a and L b can be optionally joined to form a multidentate ligand;
the multiple L a may be the same or different;
the L a has a structure represented by Formula 3-1 or Formula 3-3:

wherein,
the ring E is selected from a benzene ring;
R e represents, at each occurrence identically or differently, mono-substitution, multiple substitutions or non-substitution;
X 11 to X 14 are, at each occurrence identically or differently, selected from CR x1 ; X 31 to X 34 are, at each occurrence identically or differently, selected from CR x3 ;
Y 3 and Y 4 are, at each occurrence identically or differently, selected from CR d ;
R x1 , R x3 , R d and R e are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, and combinations thereof;
adjacent substituents R x1 , R d and R e can be optionally joined to form a ring;
when R x3 is selected from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, or substituted or unsubstituted amino having 0 to 20 carbon atoms, adjacent substituents R x3 can be optionally joined to form a ring;
L b is selected from the following structure:

R a , R b and R c represent, at each occurrence identically or differently, mono-substitution, multiple substitutions or non-substitution;
X c and X d are O;
R a , R b and R c , are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, a cyano group, and combinations thereof;
in structures of L b , adjacent substituents R a , R b , R c , can be optionally joined to form a ring; and, the following case is not comprised: the first compound is

 while the second compound is

2 . The electroluminescent device of claim 1 , wherein the H has a structure represented by Formula 1-a:

wherein A 1 to A 3 are, at each occurrence identically or differently, selected from CR, and F 1 to F 10 are, at each occurrence identically or differently, selected from CR f ; wherein
R and R f are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, a cyano group, a hydroxyl group, a sulfanyl group, and combinations thereof;
adjacent substituents R, R f can be optionally joined to form a ring.

3 . The electroluminescent device of claim 1 , wherein the H is selected from the group consisting of the following structures:

Assignees

• Beijing Summer Sprout Tech Co Ltd

Inventors

• Wang Le
• Wang Qiang
• Wang Junfei
• Zhang Han
• Zhang Qi
• Dai Zhihong
• Zhang Cuifang
• Lu Nannan
• Kwong Chi Yuen Raymond
• Xia Chuanjun

Classifications

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• H10K85/6572 Primary

  comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole · CPC title

• H10K85/654

  comprising only nitrogen as heteroatom (H10K85/652 takes precedence) · CPC title

• H10K85/342

  comprising iridium · CPC title

• C07F15/0086

  Platinum compounds · CPC title