Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2005-12-13
2005-12-13
Yamnitzky, Marie (Department: 1774)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S504000, C546S004000, C544S225000, C548S103000, C257S088000
Reexamination Certificate
active
06974639
ABSTRACT:
An electroluminescence device having a layer containing a specific metal coordination compound is provided. The metal coordination compound is represented by formula (1) below:in-line-formulae description="In-line Formulae" end="lead"?MLmL′n (1),in-line-formulae description="In-line Formulae" end="tail"?wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L′ are mutually different bidentate ligands; m is 1, 2 or 3 and n is 0, 1 or 2 with the proviso that m+n is 2 or 3; a partial structure MLm is represented by formula (2) shown below and a partial structure ML′nis represented by formula (3) or (4) shown below:The metal coordination compound of the formula (1) is characterized by having at least one aromatic substituent for at least one of CyN1, CyN2, CyC1 and CyC2. The metal coordination compound having the aromatic substituent is effective in providing high-efficiency luminescence, long-term high luminance, and less deterioration by current passing.
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Furugori Manabu
Kamatani Jun
Miura Seishi
Moriyama Takashi
Okada Shinjiro
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Yamnitzky Marie
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