NPB/Alq_3界面激子拆分研究  

Study on the exciton dissociation at the NPB-Alq_3 interface

作　　者：王爱芬[1] 孙晓宇[2] 李文彬[2] 郑晓燕 游胤涛[2] 

机构地区：[1]杭州电子科技大学理学院,杭州310012 [2]复旦大学应用表面物理国家重点实验室,上海200433

出　　处：《物理学报》2010年第9期6527-6531,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10574025);上海市科委项目资助的课题~~

摘　　要：采用瞬态光电压技术研究了NPB和Alq3界面激子拆分过程和拆分机理.对NPB和Alq3组成双层结构的样品,在脉冲355nm激光照射下,测量样品的瞬态光电压信号,通过对不同结构的和有界面激子阻挡层的样品的瞬态光电压分析,并排除了ITO/有机外界面对激子拆分的影响,得出了NPB/Alq3界面激子拆分机理是向Alq3注入电子,向NPB注入空穴.Exciton dissociation process and its mechanism at the NPB-Alq3 interface are studied by means of transient photovoltage techniques. For bilayer structured samples made from NPB and Alq3,the transient photovoltage upon 355 nm pulsed laser irradiation was measured. By analysis of the transient photovoltage of samples with different structures or with interface exciton blocking layer that climinates the effect of exciton dissociation at the external interface,it is concluded that the mechanism of exciton dissociation at the NPB-Alq3 interface results in holes injected into NPB and electrons injected into Alq3.

关 键 词：激子拆分 界面 瞬态光电压 

分 类 号：O482.7[理学—固体物理]