Probing ultrafast charge separation at organic donor/acceptor interfaces by a femtosecond electric field meter

被引：25

作者：

Kaake, L. G. ^{[1
]}

Jailaubekov, A. ^{[1
]}

Williams, K. J. ^{[1
]}

Zhu, X. -Y. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Chem & Biochem, Austin, TX 78712 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 08期

关键词：

2ND-HARMONIC GENERATION; DYNAMICS; CELLS;

D O I：

10.1063/1.3632062

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Charge separation at organic donor/acceptor interfaces is a key step in the functioning of an organic photovoltaic cell, but experimental techniques that uniquely probe the interface on ultrafast time scales are absent. Here, we apply a technique sensitive to interfacial charge separation based on four-wave mixing to follow the transient electric field at the donor/acceptor interface. Examining the model system of copper phthalocyannine (CuPc) and fullerene (C-60) bilayers, we observe ultrafast electron transfer from photoexcited CuPc to C-60 on a 80 +/- 20 fs time scale. (C) 2011 American Institute of Physics. [doi:10.1063/1.3632062]

引用

页数：3

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