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Role of coherence and delocalization in photo-induced electron transfer at organic interfaces

Overview of attention for article published in Scientific Reports, September 2016
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Title
Role of coherence and delocalization in photo-induced electron transfer at organic interfaces
Published in
Scientific Reports, September 2016
DOI 10.1038/srep32914
Pubmed ID
Authors

V. Abramavicius, V. Pranculis, A. Melianas, O. Inganäs, V. Gulbinas, D. Abramavicius

Abstract

Photo-induced charge transfer at molecular heterojunctions has gained particular interest due to the development of organic solar cells (OSC) based on blends of electron donating and accepting materials. While charge transfer between donor and acceptor molecules can be described by Marcus theory, additional carrier delocalization and coherent propagation might play the dominant role. Here, we describe ultrafast charge separation at the interface of a conjugated polymer and an aggregate of the fullerene derivative PCBM using the stochastic Schrödinger equation (SSE) and reveal the complex time evolution of electron transfer, mediated by electronic coherence and delocalization. By fitting the model to ultrafast charge separation experiments, we estimate the extent of electron delocalization and establish the transition from coherent electron propagation to incoherent hopping. Our results indicate that even a relatively weak coupling between PCBM molecules is sufficient to facilitate electron delocalization and efficient charge separation at organic interfaces.

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Mendeley readers

The data shown below were compiled from readership statistics for 47 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 47 100%

Demographic breakdown

Readers by professional status Count As %
Researcher 18 38%
Student > Ph. D. Student 10 21%
Student > Postgraduate 3 6%
Professor 2 4%
Other 2 4%
Other 7 15%
Unknown 5 11%
Readers by discipline Count As %
Physics and Astronomy 20 43%
Chemistry 10 21%
Materials Science 6 13%
Unspecified 1 2%
Chemical Engineering 1 2%
Other 1 2%
Unknown 8 17%