Anisotropy of exciton migration in poly(p-phenylene vinylene)

被引：42

作者：

Markov, D. E. ^{[1
]}

Blom, P. W. M. ^{[1
]}

机构：

[1] Univ Groningen, Mat Sci Ctr Plus, NL-9747 AG Groningen, Netherlands

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 08期

关键词：

DONOR-ACCEPTOR HETEROJUNCTIONS; PHOTOINDUCED ELECTRON-TRANSFER; CONJUGATED POLYMERS; ENERGY-TRANSFER; FILM MORPHOLOGY; CHAIN; LUMINESCENCE; TIME; FEMTOSECOND; COMPOSITES;

D O I：

10.1103/PhysRevB.74.085206

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dynamics of the exciton transport in poly(p-phenylene vinylene) (PPV) blended with a low concentration of fullerene molecules is monitored by time-resolved photoluminescence measurements. The diffusion driven motion of excitons toward these scavengers is modeled using a theory based on a random walk of a particle on lattice sites with traps. From this analysis an exciton diffusion constant of (4 +/- 0.5)x10(-4) cm(2)/s and a diffusion length of 7 nm are obtained. These exciton transport parameters are equivalent to results obtained in bilayer polymer/fullerene heterostructures, demonstrating that the exciton dynamics in PPV are dominated by a one-dimensional migration perpendicular to the film.

引用

页数：5

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