US 7,740,956 B2Granted

Organic electroluminescent device

AssigneeFUJIFILM Corporation

InventorsTatsuya Igarashi, Saisuke Watanabe, Toshihiro Ise, Hisashi Okada, Kazumi Nii

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Abstract

An organic electroluminescent device comprising: a pair of electrodes; and at least one organic layer between the pair of electrodes, the at least one organic layer between the pair of electrodes, the at least one organic layer including a luminescent layer, wherein the luminescent layer contains at least one electron injection/transport compound, at least one hole injection/transport compound, and at least one green or blue phosphorescent compound; and the electron injection/transport compound and the hole injection/transport compound each has a minimum triplet exciton energy value which is equal to or more than that of the green or blue phosphorescent compound.

Claims26

Dependent claims

An organic electroluminescent device comprising:

a pair of electrodes;
and
at least one organic layer between the pair of electrodes, the at least one organic layer including a luminescent layer,
wherein the luminescent layer contains at least one electron injection/transport compound, at least one hole injection/transport compound, and at least one green or blue phosphorescent compound;
and the electron injection/transport compound and the hole injection/transport compound each has a minimum triplet exciton energy value which is equal to or more than that of the green or blue phosphorescent compound;
wherein the hole injection/transport compound has an ionization potential of from 5.6 eV to 6.1 eV and the electron injection/transport compound has an electron affinity of from 2.0 eV to 3.5 eV;
and
wherein the electron injection/transport compound, the hole injection/transport compound and the green or blue phosphorescent compound each has a T1 value of 62 kcal/mole or more.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/530,289Filed 26 Dec 2003
Priority: JP 2002-38101427 Dec 2002
Published: US 2006/0083944 A120 Apr 2006
Granted: 22 Jun 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification35 codes

H05B 33/14
Light sources with substantially two-dimensional [2D] radiating surfaces: characterised by the chemical or physical composition or the arrangement…
C09K 11/06
Luminescent materials, e.g. electroluminescent or chemiluminescent: containing organic luminescent materials
H10K 50/11
OLEDs or polymer light-emitting diodes [PLED]: characterised by the electroluminescent [EL] layers
H10K 85/40
Organic materials used in the body or electrodes of devices covered by this subclass: organosilicon compounds, e.g. TIPS pentacene