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> |
申请人 |
PIONEER ELECTRONIC CORP., TOKIO/TOKYO, JP |
发明人 |
IMAI, KUNIO, C/O CORPORATE RES. & DEV. LAB., TSURUGASHIMA-SHI, SAITAMA, 350-02, JP;SHINKAI, MASANAO CORPORATE RES. & DEV. LAB., TSURUGASHIMA-SHI, SAITAMA, 350-02, JP;WAKIMOTO, TAKEO CORPORATE RES. & DEV. LAB., TSURUGASHIMA-SHI, SAITAMA, 350-02, JP;SHIROTA, YASUHIKO, TOYONAKA-SHI, OSAKA, JP |