ELECTROLUMINESCENT DEVICE WITH LIGHT EMITTING AROMATIC, HYDROCARBON MATERIAL
First Claim
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1. An electroluminescent device comprising:
- a. a thin body of light-generating, aromatic, electrically nonconducting, hydrocarbon material, b. a first solid phase electrode having an electrically conducting surface contacting a first surface of said light-generating material, c. a second solid phase electrode contacting a second surface of said light-generating material, said second electrode containing negative ions of an aromatic hydrocarbon material capable of injecting electrons into said second surface upon the application of a negative potential to said second electrode relative to a potential applied to said electrically conducting surface of the first electrode, and d. at least one of said electrodes being transparent for the transmission therethrough of light generated in said light-generating material by recombination of said injected electrons with holes.
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Abstract
A thin body of active material in the form of anthracene or naphthalene generates light when a current is passed through it by the injection of electrons from an electrode containing negative ions of a similar material e.g. anthracene, naphthalene or tetracene) to a base electrode to which an external positive potential relative to the electron-injecting electrode is applied. The base electrode may be solid and transparent for transmission of light generated in the active material or at its interface with the base electrode. This device also acts as a rectifier, since virtually no current will flow if the externally applied potential is reversed.
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Citations
6 Claims
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1. An electroluminescent device comprising:
- a. a thin body of light-generating, aromatic, electrically nonconducting, hydrocarbon material, b. a first solid phase electrode having an electrically conducting surface contacting a first surface of said light-generating material, c. a second solid phase electrode contacting a second surface of said light-generating material, said second electrode containing negative ions of an aromatic hydrocarbon material capable of injecting electrons into said second surface upon the application of a negative potential to said second electrode relative to a potential applied to said electrically conducting surface of the first electrode, and d. at least one of said electrodes being transparent for the transmission therethrough of light generated in said light-generating material by recombination of said injected electrons with holes.
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2. A device according to claim 1, wherein said light-generating material is anthracene and said second electrode includes negative anthracene ions.
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3. A device according to claim 1, wherein said light-generating material naphthalene and saId second electrode includes negative naphthalene ions.
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4. A device according to claim 1, wherein said light-generating material is anthracene and said second electrode includes negative naphthalene ions.
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5. A device according to claim 1, wherein said light-generating material is anthracene and said second electrode includes tetracene ions.
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6. A device according to claim 1, wherein said first electrode is formed of electrically conducting glass.
Specification
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Current AssigneeDigby F. Williams, Vanier City Martin Schadt
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Original AssigneeDigby F. Williams, Vanier City Martin Schadt
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InventorsDigby, F. Williams, Martin Schadt, Vanier City
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Primary Examiner(s)Roy Lake
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Assistant Examiner(s)Palmer C. Demeo
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Application NumberUS04/871,847Time in Patent Office749 DaysField of Search313/108R,108A,108D,358 317/235US Class Current313/504CPC Class CodesH05B 33/145 Arrangements of the electro...H05B 33/26 characterised by the compos...
