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

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 f...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2011-08, Vol.99 (8), p.083307-083307-3
Main Authors: Kaake, L. G., Jailaubekov, A., Williams, K. J., Zhu, X.-Y.
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
solar (photovoltaic), phonons, energy storage (including batteries and capacitors), defects, charge transport, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly)
SOLAR ENERGY
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3632062