US 5,427,858 A · Organic electroluminescence device with a fluorine polymer layer

Abstract

Disclosed is a novel organic electroluminescent device which can be used as a pixel for graphic display, a pixel for a television image display device or a surface light source, and this novel organic electroluminescent device overcomes the conventional problem of an organic electroluminescent device having a laminated structure in which at least a light-emitting layer formed of a luminescent organic solid is placed between two mutually opposing electrodes, i.e., a short life, by having a film of an electrically insulating polymer compound as a protection layer provided on the outer surface of the above laminated structure. In producing the novel organic electroluminescent device disclosed herein, particularly preferably, the above laminated structure is prepared in a continuous vacuum environment as a series at least from the formation of the light-emitting layer to the formation of the electrode on the light-emitting layer directly or through the electron-injecting layer or the hole-injecting layer as a series, and then the above protection layer is formed in a vacuum environment continued from the above vacuum environment.

Claims15

Dependent claims

An organic electroluminescent device comprising

(a) a laminated structure including a light-emitting layer formed of a luminescent organic solid which is disposed between mutually opposing positive and negative electrodes, the luminescent organic solid being injectable with electrons from the negative electrode and holes from the positive electrode when direct current is charged between the positive electrode and the negative electrode and thereby having an excited state therein to recombine the electrons and the holes injected into the luminescent organic solid for light emission, and
(b) a film of an electrically insulating polymer compound as a protection layer which is deposited on an outer surface of the laminated structure, said film being formed of at least one layer of a fluorine-containing copolymer obtained by copolymerizing a monomer mixture containing tetrafluoroethylene and at least one cyclic ether compound having a carbon-carbon unsaturated bond of the formula ##STR9## wherein each of X and X' is selected from the group consisting of F, Cl and H,
X and X' are the same or different from each other, and R is --CF.dbd.CF-- or has the formula ##STR10## wherein each of R' and R" is selected from the group consisting of F, Cl, --COF a --COO C.sub.1 -C.sub.6 -alkyl group, a C.sub.1 -C.sub.6 -alkyl group, an unsubstituted perfluorinated C.sub.1 -C.sub.6 -alkyl group and a hydrogen-substituted perfluorinated C.sub.1 -C.sub.6 -alkyl group.

An organic electroluminescent device comprising

(a) a laminated structure comprising a light-emitting layer formed of a luminescent organic solid which is disposed between mutually opposing positive and negative electrodes, the luminescent organic solid being injectable with electrons from the negative electrode and holes from the positive electrode when direct current is charged between the positive electrode and the negative electrode and thereby having an excited state therein to recombine the electrons and the holes injected into the luminescent organic solid for light emission, and
(b) a film of an electrically insulating polymer compound as a protection layer deposited on an outer surface of the laminated structure, said protection layer with moisture resistance being provided with a shield layer on an outer surface of the protection layer, the film of the polymer having a layer structure formed of at least one layer of a fluorine-containing copolymer, wherein the fluorine-containing copolymer is a copolymer obtained by copolymerizing a monomer mixture containing tetrafluoroethylene and at least one cyclic ether compound having a carbon-carbon unsaturated bond of the formula ##STR11## wherein each of X and X' is selected from the group consisting of F, Cl and H,
X and X' are the same or different from each other, and R is --CF.dbd.CF-- or has the formula ##STR12## wherein each of R' and R" is selected from the group consisting of F, Cl, --COF a --COO C.sub.1 -C.sub.6 -alkyl group, a C.sub.1 -C.sub.6 -alkyl group, an unsubstituted perfluorinated C.sub.1 -C.sub.6 -alkyl group and a hydrogen-substituted perfluorinated C.sub.1 -C.sub.6 -alkyl group.

Dependencies are inferred from the claim text.

Organic electroluminescence device with a fluorine polymer layer

Life of this patent

Organic electroluminescence device with a fluorine polymer layer

Life of this patent

Abstract

Claims15