| 摘要 |
<p>An organic EL element comprises a cathode (1), an EL layer (3) of organic compound, a first hole transport layer (4) of organic compound, a second hole transport layer (4a) of organic compound and an anode (2) which are laminated in sequence, wherein the second hole transport layer (4a) is made of a substance represented by the following chemical formula 1: <CHEM> 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. <IMAGE></p> |
