| 摘要 |
PROBLEM TO BE SOLVED: To provide a light-emitting element having high luminescence efficiency, high luminance, and superior color purity. SOLUTION: The light-emitting element is constituted of an element, which a luminescence substance exists in between a positive pole and a negative pole, and emits light through electrical energy, and this luminescence substance contains the organic fluorescent substance expressed by general formula (1). Here R1 to R10, are respectively chosen from among hydrogen, alkyl group, cycloalkyl group, aralkyl group, alkenyl group, cycloalkenyl group, alkyinyl group, hydroxyl group, mercapto group, alkoxy group, alkyl-thio group, aryl- ether group, aryl-thio-ether group, aryl group, heterocyclic-ring group, halogen, haloalkane, haloalkene, haloalkine, cyano group, aldehyde group, carbonyl group, carboxyl group, ester group, carbamoyl group, amino group, nitro group, cyril group, and siroxyanyl group, and R3 to R10 may respectively form ring structures between adjoining substitution groups.
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