Method of making electroluminescent devices having varying electrical and/or optical properties
First Claim
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1. A method of forming an electroluminescent device, comprising the steps of:
- forming a first charge carrier injecting layer for injecting charge carriers of a first polarity;
forming an organic charge carrier transport layer over the first charge carrier injecting layer, the transport layer having an electronic property and/or an optical property which varies across the thickness of the transport layer;
forming an organic light emissive layer over the transport layer; and
forming a second charge carrier injecting layer over the light emissive layer for injecting charge carriers of a second polarity.
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Abstract
A method of forming an electroluminescent device, including the steps of forming a first charge carrier injecting layer for injecting charge carriers of a first polarity, forming an organic charge carrier transport layer over the first charge carrier injecting layer, the transport layer having an electronic and/or optical property which varies across the thickness of the transport layer, forming an organic light emissive layer over the transport layer, and forming a second charge carrier injecting layer over the light emissive layer for injecting charge carriers of a second polarity.
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Citations
50 Claims
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1. A method of forming an electroluminescent device, comprising the steps of:
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forming a first charge carrier injecting layer for injecting charge carriers of a first polarity;
forming an organic charge carrier transport layer over the first charge carrier injecting layer, the transport layer having an electronic property and/or an optical property which varies across the thickness of the transport layer;
forming an organic light emissive layer over the transport layer; and
forming a second charge carrier injecting layer over the light emissive layer for injecting charge carriers of a second polarity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of forming an electroluminescent device, comprising:
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forming a first charge carrier injecting layer for injecting positive charge carriers;
forming an organic light emissive layer over the first charge carrier injecting layer, an electronic property and/or an optical property of the light emissive layer varying across the thickness of the emissive layer; and
forming a second charge injecting layer over the light emissive layer for injecting negative charge carriers. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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- 33. A method of forming an electroluminescent device comprising a first charge carrier injecting layer for injecting charge carriers of a first polarity, a second charge carrier injecting layer for injecting charge carriers of a second polarity and at least one organic layer located between the charge carrier injecting layers, the method comprising the step of at least partially oxidizing or reducing the organic layer.
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45. An electroluminescent device comprising:
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a first charge carrier injecting layer for injecting positive charge carriers;
a second charge carrier injecting layer for injecting negative charge carriers;
an organic light emissive layer located between the charge carrier injecting layers; and
an organic charge carrier transport layer located between the light emissive layer and one of the charge carrier injecting layers, and comprising an organic material having an electronic property and/or an optical property which varies across the thickness of the transport layer. - View Dependent Claims (46, 47, 48, 49, 50)
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Specification