Extrinsic Carrier Photogeneration in Poly(N-vinylcarbazole) Films Doped with Dimethyl Terephthalate
Extrinsic Carrier Photogeneration in Poly(N-vinylcarbazole) Films Doped with Dimethyl Terephthalate
复制标题
掺杂对苯二甲酸二甲酯的聚（N-乙烯基咔唑）薄膜中的外在载流子光生作用
DOI：
10.1246/bcsj.49.1538
复制
发表时间：
1976
影响因子：
4
通讯作者：
H. Mikawa
中科院分区：
文献类型：
--
作者：
M. Yokoyama;Y. Endo;H. Mikawa
基于先前报道的聚（N-乙烯基咔唑）薄膜掺杂对苯二甲酸二甲酯的激基复合物荧光被电场部分猝灭的实验结果，提出了外生载流子光生机理的模型。迁移的单重态激子和电子受体之间的相互作用（“相遇复合物”）通过组分之间的电荷转移过程和过量能量的热化过程产生具有相当大的分离的电子-空穴离子对。该离子对解离成自由载流子，具有Onsager的逃逸成对复合的概率，这给出了“松弛的荧光激基复合物状态”。还讨论了离子对初始分离的场依赖性。
Based upon the previously reported experimental results that the exciplex fluorescence of poly (N-vinylcarbazole) films doped with dimethyl terephthalate is partly quenched by an electric field, a model is proposed for the extrinsic carrier photogeneration mechanism. Interaction between a migrating singlet exciton and an electron acceptor (“encounter complex”) produces an electron-hole ion pair having a rather large separation through a charge-transfer process between the components and a thermalization process of the excess energy. This ion pair dissociates into free carriers with Onsager’s probability of escaping the geminate recombination which gives a “relaxed fluorescent exciplex state”. The field dependence of the initial separation of the ion pair is also discussed.