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Proceedings Article

Exploring the exciton dissociation process at a donor-acceptor heterojunction in both time and space via an induced Stark shift

[+] Author Affiliations
Noel C. Giebink

The Pennsylvania State Univ. (United States) and Argonne National Lab. (United States)

Barry P. Rand, David Cheyns, Jan Genoe

IMEC (Belgium)

Proc. SPIE 8435, Organic Photonics V, 84350L (June 1, 2012); doi:10.1117/12.924154
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From Conference Volume 8435

  • Organic Photonics V
  • Barry P. Rand; Chihaya Adachi; Volker van Elsbergen
  • Brussels, Belgium | April 16, 2012

abstract

The dissociation of excitons at a donor-acceptor interface in organic photovoltaic devices is an important but poorly understood process that takes place over multiple length and time scales. Here, we introduce a method to resolve photoinduced charge movement at an organic heterojunction in both time and space through observation of the Stark shift induced in a nearby J-aggregate probe layer. Using ultrafast transient absorption measurements, we show that this technique provides an opportunity to quantify the recombination and separation dynamics of geminate charge pairs over the entire sub-picosecond to millisecond range of relevant time scales.

© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

Topics

Absorption ; Excitons
Citation

Noel C. Giebink ; Barry P. Rand ; David Cheyns and Jan Genoe
"Exploring the exciton dissociation process at a donor-acceptor heterojunction in both time and space via an induced Stark shift", Proc. SPIE 8435, Organic Photonics V, 84350L (June 1, 2012); doi:10.1117/12.924154; http://dx.doi.org/10.1117/12.924154


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