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PPV衍生物的激发态动力学特性研究
引用本文:马国宏,郭立俊,杨毅,钱士雄,何谷峰,李永舫.PPV衍生物的激发态动力学特性研究[J].光学学报,2002,22(8):16-920.
作者姓名:马国宏  郭立俊  杨毅  钱士雄  何谷峰  李永舫
作者单位:1. 复旦大学物理系,上海,200433;复旦大学应用表面物理国家重点实验室,上海,200433
2. 复旦大学物理系,上海,200433
3. 中国科学院化学研究所,北京,100080
基金项目:国家自然科学基金 (6 99770 0 8、2 9890 2 16 )资助课题
摘    要:利用共振飞秒光学克尔效应研究了C10-PPV溶液的非线性光学响应。实验结果表明,在共振激发条件下,C10-PPV挑学克尔效应信号表现为快速上升和随后的驰豫过程,其驰豫过程由两部分组成,一个200fs的快过程和一个400ps的慢过程。通过比较C10-PPV和掺杂C60后的C10-PPV荧光光谱,400ps的慢过程可归属为聚合物链内单重态激子在不同共轭段间的迁移过程。

关 键 词:PPV衍生物  动力学特性  共轭聚合物  激子  激发态  激子迁移  驰豫特性  光学克尔效应  非线性光学响应
收稿时间:2001/5/21

Investigations of Excited State Dynamics of a PPV Derivative Using Ultrafast Kerr Spectroscopy
Ma Guohong , Guo Lijun , Yang Yi , Qian Shixiong He Gufeng Li Yongfang ,Physics.Investigations of Excited State Dynamics of a PPV Derivative Using Ultrafast Kerr Spectroscopy[J].Acta Optica Sinica,2002,22(8):16-920.
Authors:Ma Guohong  Guo Lijun  Yang Yi  Qian Shixiong He Gufeng Li Yongfang  Physics
Institution:Ma Guohong 1),2) Guo Lijun 1),2) Yang Yi 1),2) Qian Shixiong 1) He Gufeng 3) Li Yongfang 3) 1),Physics Department,Fudan University,Shanghai 200433 2),National Lab. of Applied Surface Physics,Fudan University,Shan
Abstract:Nonlinear optical response of C 10 PPV solution was investigated by using the resonant femtosecond optical Kerr effect (OKE) method. The experimental results revealed that the OKE signal showed an ultrafast rising followed by a fast and a slow relaxation process with time constant of 200 fs and 400 ps, respectively. By analysing the photoluminescence spectra of C 10 PPV and C 10 PPV doped with C 60 , it is suggested that the 400 ps slow component can be assigned to the singlet exciton migration among different conjugated segments inside polymer.
Keywords:conjugated polymer  exciton  excited state  exciton migration
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