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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0050348 (1993-05-05) |
| 우선권정보 | GB-0009011 (1989-04-20) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 595 인용 특허 : 0 |
An electroluminescent device includes a semiconductor layer (4) in the form of a thin dense polymer film comprising at least one conjugated polymer, a first contact layer (5) in contact with a first surface of the semiconductor layer, and a second contact layer (3) in contact with a second surface o
An electroluminescent device includes a semiconductor layer (4) in the form of a thin dense polymer film comprising at least one conjugated polymer, a first contact layer (5) in contact with a first surface of the semiconductor layer, and a second contact layer (3) in contact with a second surface of the semiconductor layer. The polymer film (4) of the semiconductor layer has a sufficiently low concentration of extrinsic charge carriers that on applying an electric field between the first and second contact layers across the semiconductor layer so as to render the second contact layer positive relative to the first contact layer charge carriers are injected into the semiconductor layer and radiation is emitted from the semiconductor layer. The polymer film can be poly (p-phenyenevinylene) [PPV]of formula (I) wherein the phenylene ring may optionally carry one or more substituents each independently selected from alkyl (preferably methyl), alkoxy (preferably methoxy or ethoxy), halogen (preferably chlorine or bromine) or nitro. A method of manufacture of an electroluminescent device includes steps of depositing a thin layer of a precursor polymer onto a substrate and then heating the precursor polymer to a high temperature to form the conjugated polymer.
A method of manufacture of an electroluminescent device wherein a semiconductor layer in the form of a thin layer of a dense polymer film comprising at least one conjugated polymer is deposited onto a substrate by the steps of depositing a thin layer of a precursor polymer as a thin polymer film ont
A method of manufacture of an electroluminescent device wherein a semiconductor layer in the form of a thin layer of a dense polymer film comprising at least one conjugated polymer is deposited onto a substrate by the steps of depositing a thin layer of a precursor polymer as a thin polymer film onto the substrate and then heating the deposited precursor polymer to a high temperature sufficient to convert the precursor polymer to the conjugated polymer, a thin layer of a first contact layer being placed in contact with a first surface of the semiconductor layer and a thin layer of a second contact layer being placed in contact with a second surface of the semiconductor layer, wherein the polymer film has a sufficiently low concentration of extrinsic charge carriers that on applying an electric field between the first and second contact layers once in contact with the semiconductor layer so as to render the second contact layer positive relative to the first contact layer charge carriers are injected into the semiconductor layer and radiation emitted from the semiconductor layer.
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