制备了一种高纯度的8-羟基喹啉铝的衍生物--三(5-氯-8-羟基喹啉)铝(AlClq3).用核磁共振谱仪、元素分析仪、红外光谱仪确定了AlClq3的结构.通过差示扫描量热法、紫外可见吸收光谱、荧光发射光谱和光致发光光谱表征了AlClq3的热稳定性以及能带结构.实验结果表明:AlClq3晶型转变温度为187 ℃,在紫外光的激发下,在乙醇溶液中的荧光发射峰的波长为535 nm,为黄绿色荧光,禁带宽度3.16 eV.用真空蒸镀法制备了黄绿光有机电致发光器件,其发射峰的波长为540 nm.器件的电学特性由三(5-氯-8-羟基喹啉)铝控制,在低压时由注入电流限制,高压时由陷阱电荷传导机制控制.
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