论文部分内容阅读
制备了基于三(8-羟基喹啉)铝(tris-(8-hydroxyquinoline)aluminum(Ⅲ),Alq3)的有机发光二极管,并在不同偏压下测量了器件的室温磁电导效应.在小偏压下,发光器件展示出明显的负磁电导效应.偏压增加后,磁电导由负值变为正值,出现了正负转变的现象.N,N′-二苯基-N,N′-(1-萘基)-1,1′-联苯-4,4′-二胺(N,N′-Di(naphthalen-1-yl)-N,N′diphenyl-benzidine,NPB)与铜酞菁(Copper phthalocyanine,CuPc)单极器件磁电导的测量结果表明,发光器件在小偏压下的负磁电导效应来源于器件中的CuPc层.双极电流的磁电导效应可用电子-空穴对模型进行解释,而单极电流的磁电导效应可归因于器件中的极化子-双极化子转变.在注入电流的变化过程中,发光器件的正负磁电导转变是两种机理共同作用的结果.
The organic light-emitting diodes based on tris- (8-hydroxyquinoline) aluminum (Ⅲ) and Alq3 were prepared and the room-temperature magneto-conductance effect of the device was measured under different bias voltages. When the bias voltage is increased, the magnetic conductivity changes from negative to positive, which shows the phenomenon of positive and negative transition.N, N’-diphenyl-N, N ’ (N, N’-Di (naphthalen-1-yl) -N, N’diphenyl-benzidine (NPB) The measurement of the magneto-conductance of CuPc monopole device shows that the negative magneto-conductance effect of the light-emitting device under small bias is derived from the CuPc layer in the device. The magneto-conductance effect of bipolar current can be expressed by electron-hole The model is explained, and the monopole current magneto-conductance effect can be attributed to the device in the polaron - bipolar sub-transformation.In the process of the injection current changes, the positive and negative magneto-electrical conductivity of the light-emitting device is the two mechanisms Result of joint action.