Direct observation of ultrafast field-induced charge generation in ladder-type poly(para-phenylene)

被引：138

作者：

Graupner, W

Cerullo, G

Lanzani, G

Nisoli, M

List, EJW

Leising, G

De Silvestri, S

机构：

[1] Graz Tech Univ, Inst Festkorperphys, A-8010 Graz, Austria

[2] Politecn Milan, Dipartimento Fis, Ist Nazl Fis Mat, CNR,CEQSE, I-20133 Milan, Italy

[3] Univ Sassari, Ist Nazl Fis Mat, Ist Matemat & Fis, I-07100 Sassari, Italy

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.81.3259

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Electric field-induced charge photogeneration in ladder-type poly(para-phenylene) is investigated by field-assisted femtosecond pump-probe experiments carried out on light emitting diodes. The characteristic photoinduced absorption band at 1.9 eV allows one to directly monitor the polaron population. We find that polarons are formed by exciton fission without intermediate states on a time scale of 10 ps. The buildup kinetics of the polaron population suggests a dissociation driven by exciton diffusion during interchain thermalization. [S0031-9001(98)07365-7].

引用

页码：3259 / 3262

页数：4

共 21 条

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