论文部分内容阅读
有机电致磷光器件典型双极性主体材料4,4′-N,N′-二咔唑联苯(CBP,4,4′-N,N′-dicarbazolylbiphenyl)中空穴和电子迁移率大小相近,但究竟空穴传输快还是电子传输快是一个有争议的问题。为了比较CBP中空穴和电子传输的相对快慢,本文以CBP为激子产生层,制备了多层结构的发光器件。在CBP层中插入一层超薄磷光发光材料苯基吡啶铱(Ir(ppy)3,fac-tris(2-phenylpyridine)iridium)并改变插入位置得到了不同颜色的发光器件,通过对不同器件发光性能的比较,研究了CBP的双极传输特性。结果表明,在CBP中电子和空穴主要在靠近阳极一侧复合产生激子,从而表明CBP中电子的迁移率大于空穴的迁移率。
The hole and electron mobility of 4,4’-N, N’-dicarbazolylbiphenyl (CBP) in the typical bipolar host material of organic electro-phosphorescent devices are similar, However, whether hole-transporting or electron-transporting is fast is a controversial question. In order to compare the relative speed of hole and electron transport in CBP, CBP was used as the exciton-generating layer to fabricate a multi-layered light-emitting device. In the CBP layer, an ultrathin phosphorescence luminescent material, Ir (ppy) 3, fac-tris (2-phenylpyridine) iridium, was inserted into the CBP layer to obtain different color light emitting devices. The performance of CBP bipolar transmission characteristics. The results show that in CBP, electrons and holes recombine mainly in the vicinity of the anode to generate excitons, indicating that the electron mobility in CBP is larger than the hole mobility.