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US 7,785,718 B2Granted
Organic electroluminescent device and method for manufacturing the same
AssigneePanasonic Corporation
InventorsRyuichi Yatsunami, Kei Sakanoue
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Abstract
An organic EL device which drives over a wide range from low brightness to high brightness for light source applications, operates stably over a wide range of brightness and has excellent life property is provided. The device comprises at least one pair of electrodes 2 and 5, and a plurality of functional layers disposed between the electrodes 2 and 5, the functional layers comprising a layer 4 having the light emitting function, which is composed of at least one polymeric material and contains an organic solvent and a charge injection layer 3 composed of at least one inorganic material.
Claims36
An organic electroluminescent device comprising:
- at least one pair of electrodes;
- and
- a plurality of functional layers formed between the electrodes,
- wherein the functional layers include:
- a layer having a light emitting function, which comprises at least one polymeric material;
- a charge injection layer comprising at least one inorganic material, the charge injection layer being formed by a dry process and the at least one inorganic material comprising a molybdenum trioxide and a molybdenum oxide of valency 4 and a molybdenum oxide of valency 3;
- and
- at least one buffer layer positioned between the layer having a light emitting function and the charge injection layer, the at least one buffer layer comprising a polyfluorene-based compound.
5 more elements
An organic electroluminescent device comprising:
- at least one pair of electrodes;
- and
- a plurality of functional layers formed between the electrodes,
- wherein the functional layers include:
- a layer having a light emitting function, which comprises at least one polymeric material;
- a charge injection layer comprising at least one inorganic material, the charge injection layer being formed by a dry process and the at least one inorganic material comprising a molybdenum trioxide and a molybdenum oxide of valency 4 and a molybdenum oxide of valency 3;
- and
- at least one buffer layer positioned between the layer having a light emitting function and the charge injection layer, the at least one buffer layer having an electron-blocking function;
- and
- wherein an absolute value for an energy value representing an electron affinity of the at least one buffer layer is smaller than an absolute value for an energy value representing an electron affinity of the layer having a light emitting function.
7 more elements
An organic electroluminescent device comprising:
- at least one pair of electrodes;
- and
- a plurality of functional layers formed between the electrodes,
- wherein the functional layers include:
- a layer having a light emitting function, which comprises at least one polymeric material;
- a charge injection layer comprising at least one inorganic material, the charge injection layer being formed by a dry process and the at least one inorganic material comprising a molybdenum trioxide and a molybdenum oxide of valency 4 and a molybdenum oxide of valency 3;
- and
- at least one buffer layer positioned between the layer having a light emitting function and the charge injection layer, the at least one buffer layer having an electron-blocking function;
- and
- wherein the charge injection layer further comprises vanadium oxide.
7 more elements
An organic electroluminescent device comprising:
- at least one pair of electrodes;
- and
- a plurality of functional layers formed between the electrodes,
- wherein the functional layers include:
- a layer having a light emitting function, which comprises at least one polymeric material;
- a charge injection layer comprising at least one inorganic material, the charge injection layer being formed by a dry process and the at least one inorganic material comprising a molybdenum trioxide and a molybdenum oxide of valency 4 and a molybdenum oxide of valency 3;
- and
- at least one buffer layer positioned between the layer having a light emitting function and the charge injection layer, the at least one buffer layer having an electron-blocking function;
- and
- wherein the at least one buffer layer comprises a polymeric layer.
7 more elements
An organic electroluminescent device comprising:
- at least one pair of electrodes;
- and
- a plurality of functional layers formed between the electrodes,
- wherein the functional layers include:
- a layer having a light emitting function, which comprises at least one polymeric material and contains an organic solvent;
- and
- a charge injection layer comprising at least one inorganic material, the charge injection layer being formed by a dry process and the at least one inorganic material comprising a molybdenum trioxide and a molybdenum oxide of valency 4 and a molybdenum oxide of valency 3;
- and
- at least one buffer layer positioned between the layer having a light emitting function and the charge injection layer, the at least one buffer layer comprising a polyfluorene-based compound.
6 more elements
An organic electroluminescent device comprising:
- at least one pair of electrodes;
- and
- a plurality of functional layers formed between the electrodes,
- wherein the functional layers include:
- a layer having a light emitting function, which comprises at least one polymeric material and contains an organic solvent;
- and
- a charge injection layer comprising at least one inorganic material, the charge injection layer being formed by a dry process and the at least one inorganic material comprising a molybdenum trioxide and a molybdenum oxide of valency 4 and a molybdenum oxide of valency 3;
- and
- at least one buffer layer positioned between the layer having a light emitting function and the charge injection layer;
- and
- wherein the at least one buffer layer comprises a polymeric layer.
8 more elements
An organic electroluminescent device comprising:
- at least one pair of electrodes;
- and
- a plurality of functional layers, formed between the electrodes,
- wherein the functional layers include:
- a layer having a light emitting function, which comprises at least one polymeric material and contains an organic solvent;
- and
- a charge injection layer comprising at least one inorganic material, the charge injection layer being formed by a dry process and the at least one inorganic material comprising a molybdenum trioxide and a molybdenum oxide of valency 4 and a molybdenum oxide of valency 3;
- and
- at least one buffer layer positioned between the layer having a light emitting function and the charge injection layer;
- and
- wherein the at least one buffer layer comprises an organic solvent.
8 more elements
An organic electroluminescent device comprising:
- at least one pair of electrodes;
- and
- a plurality of functional layers, formed between the electrodes,
- wherein the functional layers include:
- a layer having a light emitting function, which comprises at least one polymeric material and contains an organic solvent;
- and
- a charge injection layer comprising at least one inorganic material, the charge injection layer being formed by a dry process and the at least one inorganic material comprising a molybdenum trioxide and a molybdenum oxide of valency 4 and a molybdenum oxide of valency 3;
- and
- at least one buffer layer positioned between the layer having a light emitting function and the charge injection layer;
- and
- wherein an absolute value for an energy value representing an electron affinity of the at least one buffer layer is smaller than an absolute value for an energy value representing an electron affinity of the layer having a light emitting function.
8 more elements
An organic electroluminescent device comprising:
- at least one pair of electrodes;
- and
- a plurality of functional layers formed between the electrodes,
- wherein the functional layers include:
- a layer having a light emitting function, which comprises at least one polymeric material and contains an organic solvent;
- and
- a charge injection layer comprising at least one inorganic material, the charge injection layer being formed by a dry process and the at least one inorganic material comprising a molybdenum trioxide and a molybdenum oxide of valency 4 and a molybdenum oxide of valency 3;
- and
- at least one buffer layer positioned between the layer having a light emitting function and the charge injection layer;
- and
- wherein the charge injection layer comprises vanadium oxide.
8 more elements
A method for manufacturing an organic electroluminescent device which comprises at least one pair of electrodes and a plurality of functional layers formed between the electrodes,
- wherein the functional layers include a layer having a light emitting function which comprises at least one polymeric material;
- and a charge injection layer comprising at least one inorganic material, the at least one inorganic material comprising a molybdenum trioxide and a molybdenum oxide of valency 4 and a molybdenum oxide of valency 3;
- and at least one buffer layer positioned between the layer having a light emitting function and the charge injection layer, the at least one buffer layer comprising a polyfluorene-based compound, and comprising the method of:
- forming the layer having a light emitting function by supplying a polymeric compound solution, forming the charge injection layer by a dry process, and forming the at least one buffer layer comprising a polyfluorene-based compound between the layer having a light emitting function and the charge injection layer.
1 more element
Dependencies are inferred from the claim text.