申请人:EASTMAN KODAK COMPANY
公开号:EP0643549A1
公开(公告)日:1995-03-15
An internal junction organic electroluminescent device (100) comprises, in sequence, an anode (110), an organic electroluminescent medium (120), and a cathode (160), the organic electroluminescent medium further comprising a hole injecting and transporting zone (130) contiguous with the anode (110) and an electron injecting and transporting zone (140) contiguous with the cathode (160), the electron injecting and transporting zone (140) further comprising an electron injecting layer (142) in contact with the cathode (160), characterized in that the portion of the organic electroluminescent medium (120) that is interposed between the electron injecting layer (142) and the hole injecting and transporting zone (130) is capable of emitting white light in response to hole-electron recombination and comprises a fluorescent material and a mixed ligand aluminum chelate of the formula
(RS-Q)₂-A1-O-L
where Q in each occurrence represents a substituted 8-quinolinolato ligand, Rs represents an 8-quinolinolato ring substituent chosen to block sterically the attachment of more than two substituted 8-quinolinolato ligands to the aluminum atoms, O-L is a phenolato ligand, and L is a hydrocarbon group that includes a phenyl moiety.
一种内部结有机电致发光器件(100)依次包括阳极(110)、有机电致发光介质(120)和阴极(160),有机电致发光介质进一步包括与阳极(110)相邻的空穴注入和传输区(130)以及与阴极(160)相邻的电子注入和传输区(140)、电子注入和传输区(140)进一步包括与阴极(160)接触的电子注入层(142),其特征在于,位于电子注入层(142)和空穴注入和传输区(130)之间的有机电致发光介质(120)部分能够在空穴-电子重组时发出白光,并包括荧光材料和式中的混合配体铝螯合物
(RS-Q)₂-A1-O-L
其中每次出现的 Q 代表取代的 8-喹啉配体,Rs 代表 8-喹啉环取代基,选择该取代基是为了在立体上阻断两个以上取代的 8-喹啉配体与铝原子的连接,O-L 是苯酚配体,L 是包括苯基的烃基。