Organic compound and organic light emitting diode using the same

• US 9,590,191 B2
• Filed: 02/08/2016
• Issued: 03/07/2017
• Est. Priority Date: 12/05/2013
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Song, In-Bum, Chae, Gee-Sung, Yang, Joong-Hwan, Bae, Suk-Young, Kim, Chun-Ki
• Primary Examiner(s): Bohaty, Andrew K
• Application Number:
  US15/018,536
• Publication Number:
  US 20160155956A1
• Time in Patent Office: 393 Days
• Field of Search: 428/690, 428/691, 428/917, 428/411.4, 428/336, 313500-512, 257/40, 257 88-104, 257E51001-E51052, 25230116-30135
• US Class Current: 1/1
• CPC Class Codes: C09B 57/00 Other synthetic dyes of known constitution
• CPC Class Codes: C09B 57/008 Triarylamine dyes containing no other chromophores
• CPC Class Codes: C09B 69/008 Dyes containing a substituent, which contains a silicium atom
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/1077 with oxygen
• CPC Class Codes: C09K 2211/1081 with sulfur
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H10K 2101/30 Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values
• CPC Class Codes: H10K 2101/40 Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/15 Hole transporting layers
• CPC Class Codes: H10K 50/17 Carrier injection layers
• CPC Class Codes: H10K 85/40 Organosilicon compounds, e.g. TIPS pentacene
• CPC Class Codes: H10K 85/60 Organic compounds having low molecular weight H10K85/10 - H10K85/50 take precedence
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• CPC Class Codes: H10K 85/633 comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/636 comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
• CPC Class Codes: H10K 85/6574 : comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
• CPC Class Codes: H10K 85/6576 : comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Abstract

Discussed is an organic electroluminescent device including a first charge carrying layer being disposed adjacent to a first electrode; and a second charge carrying layer disposed adjacent to a second electrode, wherein the first charge carrying layer includes an emitting part, a hole injection part and a hole transporting part between the hole injection part and the emitting part, wherein at least one of the hole injection part, the hole transporting part and the emitting part includes a host material having an organic compound of Formula:

wherein R is substituted or non-substituted C1 to C12 alkyl, and A and B are symmetrically or asymmetrically positioned in 2-position or 7-position of the fluorene core, and wherein each of A and B is independently selected from substituted or non-substituted aromatic group or substituted or non-substituted heterocyclic group.

Claims

1. An organic electroluminescent device, comprising:

a first electrode;

a second electrode facing the first electrode;

a first charge carrying layer disposed between the first electrode and the second electrode, the first charge carrying layer being disposed adjacent to the first electrode; and

a second charge carrying layer disposed between the first electrode and the second electrode, the second charge carrying layer disposed adjacent to the second electrode,

wherein the first charge carrying layer includes an emitting sub-layer, a hole injection sub-layer and a hole transporting sub-layer between the hole injection sub-layer and the emitting sub-layer,

wherein the hole injection sub-layer includes an organic compound of Formula;

2. The organic electroluminescent device according to claim 1, wherein the Y is selected from phenyl, naphthyl, terphenyl, xylene, triphenylamine, diphenylamine and phenanthrenylamine.

3. The organic electroluminescent device according to claim 1, wherein the organic compound of the Formula is selected from the followings:

4. The organic electroluminescent device according to claim 1, wherein the hole transporting sub-layer includes the organic compound of the Formula.

5. The organic electroluminescent device according to claim 1, wherein the emitting sub-layer includes the organic compound as a host material and a dopant material doped to the host material.

6. The organic electroluminescent device according to claim 5, wherein the organic material of the Formula has 0.1 to 20 weight % with respect to a total weight of the hole injection sub-layer.

7. The organic electroluminescent device according to claim 1, wherein the organic compound has a band gap energy being larger than about 2.9 eV.