ULTRAFAST EXCITATION RELAXATION IN COLLOIDAL PARTICLES OF CHLOROALUMINUM PHTHALOCYANINE - ONE-DIMENSIONAL EXCITON-EXCITON ANNIHILATION

被引：21

作者：

GULBINAS, V

CHACHISVILIS, M

PERSSON, A

SVANBERG, S

SUNDSTROM, V

机构：

[1] UMEA UNIV,DEPT PHYS CHEM,S-90187 UMEA,SWEDEN

[2] INST PHYS,VILNIUS,LITHUANIA

[3] LUND INST TECHNOL,DEPT ATOM PHYS,S-22100 LUND,SWEDEN

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1994年 / 98卷 / 33期

关键词：

D O I：

10.1021/j100084a032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The excited-state dynamics of crystalline ClAl phthalocyanine colloidal particles have been studied by means of picosecond and femtosecond absorption spectroscopy. In the measured relaxation dynamics, the initial excited-state evolution, taking place during the first picosecond after excitation, was distinguished from the overall exciton decay. Excitation transfer between different molecular species is suggested to be the most probable reason to the initial (less than or equal to 1 ps) excited-state dynamics. Exciton decay was found to be dominated by exciton-exciton annihilation with a t(-1/2) time dependence of the excited-state population, suggesting a one-dimensional exciton diffusion. A 0.2-1 ps intermolecular exciton hopping time was determined from the annihilation dynamics.

引用

页码：8118 / 8123

页数：6

共 23 条

[1] ULTRAFAST ELECTRONIC DEACTIVATION AND VIBRATIONAL DYNAMICS OF PHOTOEXCITED URANIUM(IV) PORPHYRIN SANDWICH COMPLEXES [J].