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    • 46. 发明专利
    • ELECTROLUMINESCENT ELEMENT
    • JPH10259372A
    • 1998-09-29
    • JP6677797
    • 1997-03-19
    • TOYOTA CENTRAL RES & DEV
    • TANAKA HIROMITSUOKADA AKANETOKITOU SEIJITAGA YASUNORI
    • C09K11/06H01L51/50H05B33/14H05B33/22
    • PROBLEM TO BE SOLVED: To obtain an org. electroluminescent element which can emit blue light and is excellent in stability by incorporating a metal complex of an oxadiazol compd. or/and a thiadiazole compd. as a luminescent material or an electron transport material into an org. layer of the element. SOLUTION: This element is formed by laminating the first transparent electrode, an org. layer mainly comprising an org. compd. which emits light under voltage applied, and the second electrode successively on a transparent substrate. The org. layer contains a metal complex of an oxadiazole compd. and/or a thiadiazole compd. as a luminescent material or an electron transport material. In the complex, the ligand of an oxadiazole compd. and/or a thiadiazole compd. having a backbone represented by formula I (X is O or S), pref. by formula II (X is O or S), is a hydroxyl or thiol group, and a metal ion is coordinated to the ligand. Converting an oxdiazole compd. and/or a thiadiazole compd. into a metal complex decreases the crystallinity and improves the electron transport function, luminescent function, and stability of the element.