Abstract: Disclosed are organic EL elements having high environmental stability as well as high luminous efficiency and luminance. In an organic EL element comprising a transparent anode, a hole-carrying layer, a light-emitting layer and an alloy cathode consisting of a first metal Li and a stabilizing second metal Al, all laminated on a substrate, the concentration of the first metal Li contained in the alloy region with a predetermined thickness from the interface between the alloy cathode and the organic layer is controlled to a minute amount ranging from 0.005 wt. % to 0.3 wt. %.

Abstract: An organic EL element comprises a cathode, an EL layer of organic compound, a first hole transport layer of organic compound, a second hole transport layer of organic compound and an anode which are laminated in sequence, wherein the second hole transport layer is made of a substance represented by the following chemical formula 1: ##STR1## where R each independently represents a hydrogen atom, an alkyl group of from 1 to 6 carbon atoms, a halogen group, a cyano group, a nitro group, a primary, secondary or tertiary amino group, or an aryl group of from 6 to 15 carbon atoms. This organic EL element prevents a leakage current and emits light stably for a long time.

Abstract: An electroluminescent device comprising a fluophor luminescent layer and a hole transport layer respectively composed of organic compounds and laminated to each other disposed between a cathode and an anode, said fluophor luminescent layer comprising a pair of fluophor thin films laminated in each other, the material of the cathode-side film having a larger electron transport capacity than the material of the anode-side film.

Abstract: The electroluminescent element of the present invention comprises a fluorescent substance layer containing a courmarinic or azacoumarinic derivative and a hole transport layer, both made of organic compounds and laminated on top of the other. The both layers are interposed between cathode and anode electrodes. It emits light efficiently at a high luminance upon application of a low voltage between the electrodes.

Abstract: Disclosed herein is an electroluminescent element which is constructed such that a fluorescent substance layer and a hole transport layer, both made of organic compounds and laminated on top of the other, are interposed between a cathode and an anode. The fluorescent substance layer is a thin film containing a bisstyryl derivative. It emits blue light efficiently at a high luminance upon application of a low voltage.