申请人:EASTMAN KODAK COMPANY
公开号:EP0525739A1
公开(公告)日:1993-02-03
An internal junction organic electroluminescent device (200) is disclosed comprised of, in sequence, an anode (202), an organic hole injecting and transporting zone (210), an organic electron injecting and transporting zone (212), and a cathode (216). The organic electron injecting and transporting zone (212) is comprised of an electron injecting layer (222) in contact with the cathode (216) and, interposed between the electron injecting layer (222) and the organic hole injecting and transporting zone (210), a blue emitting luminescent layer (224) comprised of a bis(Rs-8-quinolino-lato)aluminum(III)-µ-oxo-bis(Rs-8 -quinolinolato)-aluminum(III), where RS substituents are chosen to block the attachment of more than two substituted 8-quinolinolato ring nuclei to any one aluminum atom. Increased operating stability and device emission at even shorter blue wavelengths can be realized by the incorporation of a pentacarbocyclic aromatic fluorescent dye.
公开了一种内部结有机电致发光器件(200),该器件依次由阳极(202)、有机空穴注入和传输区(210)、有机电子注入和传输区(212)以及阴极(216)组成。有机电子注入和传输区(212)由与阴极(216)接触的电子注入层(222)和位于电子注入层(222)与有机空穴注入和传输区(210)之间的电子注入层(222)组成、由双(Rs-8-喹啉-lato)铝(III)-µ-氧代-双(Rs-8-喹啉-lato)铝(III)组成的蓝色发光层(224),其中 RS 取代基的选择是为了阻止两个以上取代的 8-喹啉环核附着到任何一个铝原子上。通过加入五碳环芳香族荧光染料,可以提高工作稳定性和器件在更短蓝色波长下的发射率。