Electron transport material and light emitting diode that contains the electron transport material
申请人:Agere Systems Guardian Corp.
公开号:US06428912B1
公开(公告)日:2002-08-06
An improved multilayer light emitting device includes novel compounds for use as the electron transporting layer. In particular, the novel compounds are novel aluminum cheltates (e.g. tris(9-oxidophenalenone) aluminum [Al(9-opo)3] and tris(6-oxidobenzanthrone) aluminum [Al(6-obao)3]. These compounds are electron acceptors having improved thermal stability while in most cases and in most applications maintaining comparable efficiencies. When negatively biased, electrons are infected into the electron transporting layer. The concurrent positive bias on the anode in relation to the cathode causes holes to be injected from the cathode into the hole transporting layer. Electroluminescence is produced and confined generally near the interface between these electron and hole transporting layers an a result of the recombination of the electron and hole pairs.
一种改进的多层发光装置包括用作电子传输层的新化合物。特别是,这些新化合物是新的铝螯合物(例如,三(9-氧化苯并酮)铝[Al(9-opo)3]和三(6-氧化苯并蒽)铝[Al(6-obao)3])。这些化合物是具有改进的热稳定性的电子受体,在大多数情况和大多数应用中保持相当的效率。在负偏置时,电子被注入电子传输层。在阳极与阴极之间的同时正偏置会导致空穴从阴极注入到空穴传输层中。由于电子和空穴对的复合,在这些电子和空穴传输层之间的界面附近产生电致发光。