PURPOSE: To obtain the subject element of practical level, having intense luminous strength and high durability by providing one or more layers containing a compound obtained by forming condensed rings in a specific organic compound.
CONSTITUTION: The objective element is obtained by forming a layer containing a compound obtained by forming one or two condensed rings (e.g. a compound of formula IV) in an organic compound of formula I {the residue Z is formula II formula III or formula IV [R1 to R4 are H, halogen, (substituted)alkyl, etc., and R1 and R2, R2 and R3 and R3 and R4 may each together form (substituted) ring structures; Y is (substituted)heterocyclic ring], etc.} by a vapor deposition method, spin coat method, etc., to afford luminescent layer having 10-1000nm film thickness and constituting these layers in a form of a substrate of soda glass, acrylic resin, etc.,/anode/the above-mentioned luminescent layer/cathode, etc.
TAKEUCHI SHIGEKI
KINOSHITA AKIRA
SHIBATA TOYOKO
TAMAKI KIYOSHI
