Patent ID: 6921589

Claim:
An electroluminescent element comprising a substance which brings about luminescence is disposed between an anode and a cathode, the electroluminescent element emits light at a peak wavelength of at least 580 nm by means of electrical energy, the substance which brings about luminescence comprises a fluorescent compound having a fluorescence maximum at 540 nm or above and a compound with a pyrromethene structure represented by the following general formula (1) or a metal complex thereof, wherein at least one of R 1 , R 3 , R 4 , or R 6 is selected from the group consisting of an alkenyl group, or an aryl group, or a heterocycle group, or forms a fused ring with an adjacent substituent, R 7 is selected from the group consisting of hydrogen, alkyl groups, alkoxy groups, at least one halogen atom, aralkyl groups, alkenyl groups, arylether groups, heterocycle groups, cyano groups, aldehyde groups, carbonyl groups, ester groups, carbamoyl groups, amino groups, and fused rings and aliphatic rings formed with an adjacent substituent, and the remaining substituents are selected from the group consisting of hydrogen, alkyl groups, alkoxy groups, at least one halogen atom, aryl groups, aralkyl groups, alkenyl groups, arylether groups, heterocycle groups, cyano groups, aldehyde groups, carbonyl groups, ester groups, carbamoyl groups, amino groups, and fused rings and aliphatic rings formed with an adjacent substituent, X is carbon or nitrogen, but when X is nitrogen, no R 7 is present, and when X is carbon, R 7 may not be a cyano group.