To provide practical, high luminescence and sufficient durability and thereby realize a practical display by doping a substance formed from a b- dithienylpyrrole derivative into a luminescent layer formed between a pair of electrodes.
The luminescent layer of an electroluminescent element formed from an organic compound is formed between a pair of electrodes at least one of which is transparent. A substance formed from a b-dithienylpyrrole derivative expressed by the formula is doped into the luminescent layer within the range of around 0.5-5 mol.%. In the formula, a group represented by R1-R4 is selected from a hydrogen atom, a halogen atom, an alkyl group, a halogenated alkyl group, an alkoxy group, an aryl group, a cyano group, a nitro group, and a formyl group. Each layer constituting the organic electroluminescent element is formed by being deposited under a vacuum condition of around 1×10-6 Torr. Thereby, continuous light emission that is stabilized for more than approximately 1000 hours can be provided.
FUKUDA TATSUO
YANAI HIROYUKI
