摘要
The carrier transport properties of the blends of the hole transport material poly(N-vinylcarbazole) (PVK) and the electron transport material tris (8-hydroxyquinolinolato) aluminumⅢ(Alq_3) are investigated at room temperature using steady-state and time-resolved transient photocurrent measurements as a function of doping concentration of Alq_3.Due to lower LUMO and higher HOMO energy level of Alq_3 than those of PVK,Alq_3 molecules may act as carrier trap states in PVK films at low concentration.However,at...
The carrier transport properties of the blends of the hole transport material poly(N-vinylcarbazole) (PVK) and the electron transport material tris (8-hydroxyquinolinolato) aluminumⅢ(Alq_3) are investigated at room temperature using steady-state and time-resolved transient photocurrent measurements as a function of doping concentration of Alq_3.Due to lower LUMO and higher HOMO energy level of Alq_3 than those of PVK,Alq_3 molecules may act as carrier trap states in PVK films at low concentration.However,at...
基金
Trans-Century Training Program Foundation for the Talents of Natural Science by the State Education Commission,Key Project of Chinese Ministry of Education (No.105041)
National Natural Science & Foundation Committee of China (NSFC) (Nos.90401006,10434030 and 90301004)
State key project of basic research (No.2003CB314707)
the Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology,South China University of Technology,Ministry of Education,China.One of the authors (Hui Jin) is also grateful to the Doctor Innovation Foundation of Beijing Jiaotong University for financial support.
