Thin film electroluminescence device
AssigneeIdemitsu Kosan Co., Ltd.
InventorsChishio Hosokawa, Hisahiro Higashi, Tadashi Kusumoto
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Abstract
A thin film electroluminescence device and a process for production thereof. This device is characterized in that as a light emitting layer material or charge injection layer material, a polymer film having at least one of a light emitting layer function, a charge transport function and a charge injection function, and having a film thickness of not: more than 0.5 .mu.m is prepared by the vacuum evaporation method and used.
Claims13
A thin film electroluminescence device comprising an anode, a cathode and a charge injection layer disposed between said anode and said cathode, said charge injection layer being smooth, uniform and pinholeless and consisting essentially of a heat resistant polymer thin film having groups with a charge injection layer function as repeating units, said polymer thin film having a thickness of not more than 0.5 .mu.m, and said polymer thin film being prepared by a vacuum evaporation polymerization method.
A thin film electroluminescence device comprising an anode, a cathode and a charge transport layer disposed between said anode and said cathode, said charge transport layer being smooth, uniform and pinholeless and consisting essentially of a heat resistant polymer thin film having groups with a charge transport layer function as repeating units, said polymer thin film having a thickness of not more than 0.5 .mu.m and said polymer thin film being prepared by a vacuum evaporation polymerization method.
A process for producing an organic thin film electroluminescence device which comprises:
- (a) forming a first electrode an a substrate,
- (b) forming a charge injection layer on said substrate,
- (c) forming a light emitting layer on said substrate, said light emitting layer having a light emitting function necessary for electroluminescence and
- (d) forming a second electrode on said substrate, said second electrode being opposite to said first electrode,
- said charge injection layer and said light emitting layer being disposed between said first electrode and said second electrode,
- wherein the forming of said charge injection layer is carried out by vacuum depositing a heat resistant polymer forming monomer and then polymerizing the monomer.
A process for producing an organic thin film electroluminescence device which comprises:
- (a) forming a first electrode on a substrate,
- (b) forming a charge transport layer on said substrate,
- (c) forming a light emitting layer on said substrate, said light emitting layer having a light emitting function necessary for electroluminescence and
- (d) forming a second electrode on said substrate, said second electrode which is being opposite to said first electrode,
- said charge transport layer and said light emitting layer being disposed between said first electrode and said second electrode,
- wherein the forming of said charge transport layer is carried out by vacuum depositing a heat resistant polymer forming monomer and then polymerizing the monomer.
Dependencies are inferred from the claim text.