Dispersive relaxation of photoexcited defects in bipyridine-PPV derivatives measured by photoinduced absorption

被引:3
作者
Epshtein, O [1 ]
Nakhmanovich, G
Eichen, Y
Ehrenfreund, E
机构
[1] Technion Israel Inst Technol, Inst Solid State, IL-32000 Haifa, Israel
[2] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel
[3] Technion Israel Inst Technol, Dept Chem, IL-32000 Haifa, Israel
关键词
photomodulation spectroscopy; dispersive relaxation; lifetime distribution; bipyridine-PPV derivatives;
D O I
10.1016/S0379-6779(00)00631-7
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have measured the dynamics of the electronic absorptions of the photoinduced defects in bipyridine-PPV derivatives. Their dependence on the laser pump intensity and modulation frequency reveal evolution in time which can be described by "dispersive relaxation" behavior. This behavior can be quantified as a mono-molecular recombination process combined with an asymmetric lifetime distribution.
引用
收藏
页码:585 / 586
页数:2
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