Dynamics of exciton diffusion in poly(p-phenylene vinylene)/fullerene heterostructures -: art. no. 045216

被引：80

作者：

Markov, DE

Hummelen, JC

Blom, PWM

Sieval, AB

机构：

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

[2] Biomade Technol Fdn, NL-9747 AG Groningen, Netherlands

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.72.045216

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The exciton diffusion process in a poly(p-phenylene vinylene)- (PPV-)based derivative is investigated using time-resolved photoluminescence in conjugated polymer/fullerene heterostructures. The decay of the luminescence in the polymer/fullerene heterostructures is governed by exciton diffusion and subsequent dissociation at the polymer/fullerene interface. The decay curves of polymer layers with varying thickness are consistently modeled using an exciton diffusion constant of 3x10(-4) cm(2)/s. The resulting exciton migration radius amounts to 6 nm, which is a measure for the active part of the PPV/fullerene heterojunction for photovoltaic applications.

引用

页数：5

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