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

Noel Christopher Giebink; Barry P. Rand; David Cheyns; Jan Genoe

doi:10.1117/12.924154

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

Noel Christopher Giebink, Barry P. Rand, David Cheyns, Jan Genoe

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English (US)
Title of host publication	Organic Photonics V
Volume	8435
DOIs	https://doi.org/10.1117/12.924154
State	Published - 2012
Event	Organic Photonics V - Brussels, Belgium Duration: Apr 16 2012 → Apr 18 2012

Other

Other	Organic Photonics V
Country	Belgium
City	Brussels
Period	4/16/12 → 4/18/12

All Science Journal Classification (ASJC) codes

Applied Mathematics
Computer Science Applications
Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1117/12.924154

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Giebink, N. C., Rand, B. P., Cheyns, D., & Genoe, J. (2012). Exploring the exciton dissociation process at a donor-acceptor heterojunction in both time and space via an induced Stark shift. In Organic Photonics V (Vol. 8435). [84350L] https://doi.org/10.1117/12.924154

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AU - Cheyns, David

AU - Genoe, Jan

PY - 2012

Y1 - 2012

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AB - 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.

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BT - Organic Photonics V

T2 - Organic Photonics V

Y2 - 16 April 2012 through 18 April 2012

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