Ultrafast Long-Range Charge Separation in Nonfullerene Organic Solar Cells

Yasunari Tamai; Yeli Fan; Vincent O. Kim; Kostiantyn Ziabrev; Akshay Rao; Stephen Barlow; Seth R. Marder; Richard H. Friend; S. Matthew Menke

doi:10.1021/acsnano.7b06575

Ultrafast Long-Range Charge Separation in Nonfullerene Organic Solar Cells

Yasunari Tamai, Yeli Fan, Vincent O. Kim, Kostiantyn Ziabrev, Akshay Rao, Stephen Barlow, Seth R. Marder, Richard H. Friend, S. Matthew Menke

Research output: Contribution to journal › Article › peer-review

88 Scopus citations

Abstract

Rapid, long-range charge separation in polymer-fullerene organic solar cells (OSCs) enables electrons and holes to move beyond their Coulomb capture radius and overcome geminate recombination. Understanding the nature of charge generation and recombination mechanisms in efficient, nonfullerene-acceptor-based OSCs are critical to further improve device performance. Here we report charge dynamics in an OSC using a perylene diimide (PDI) dimer acceptor. We use transient absorption spectroscopy to track the time evolution of electroabsorption caused by the dipolar electric field generated between electron-hole pairs as they separate after ionization at the donor-acceptor interface. We show that charges separate rapidly (

Original language	English (US)
Pages (from-to)	12473-12481
Number of pages	9
Journal	ACS Nano
Volume	11
Issue number	12
DOIs	https://doi.org/10.1021/acsnano.7b06575
State	Published - Nov 17 2017
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
General Materials Science
General Engineering

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10.1021/acsnano.7b06575

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title = "Ultrafast Long-Range Charge Separation in Nonfullerene Organic Solar Cells",

abstract = "Rapid, long-range charge separation in polymer-fullerene organic solar cells (OSCs) enables electrons and holes to move beyond their Coulomb capture radius and overcome geminate recombination. Understanding the nature of charge generation and recombination mechanisms in efficient, nonfullerene-acceptor-based OSCs are critical to further improve device performance. Here we report charge dynamics in an OSC using a perylene diimide (PDI) dimer acceptor. We use transient absorption spectroscopy to track the time evolution of electroabsorption caused by the dipolar electric field generated between electron-hole pairs as they separate after ionization at the donor-acceptor interface. We show that charges separate rapidly (",

author = "Yasunari Tamai and Yeli Fan and Kim, {Vincent O.} and Kostiantyn Ziabrev and Akshay Rao and Stephen Barlow and Marder, {Seth R.} and Friend, {Richard H.} and Menke, {S. Matthew}",

note = "KAUST Repository Item: Exported on 2021-04-13 Acknowledgements: The authors thank the Engineering and Physical Sciences Research Council (EPSRC) and the Winton Programme for the Physics of Sustainability. Y.T. was supported by JSPS Postdoctoral Fellowships for Research Abroad. Work at Georgia Tech was supported by the Department of the Navy, Office of Naval Research award no. N00014-14-1-0580 (CAOP MURI) and through a State-Sponsored Scholarship for Graduate Students to Y.F. from the China Scholarship Council. S.M.M. and R.H.F acknowledge support from the KAUST Competitive Research Grant Program. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

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doi = "10.1021/acsnano.7b06575",

language = "English (US)",

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T1 - Ultrafast Long-Range Charge Separation in Nonfullerene Organic Solar Cells

AU - Tamai, Yasunari

AU - Fan, Yeli

AU - Kim, Vincent O.

AU - Ziabrev, Kostiantyn

AU - Rao, Akshay

AU - Barlow, Stephen

AU - Marder, Seth R.

AU - Friend, Richard H.

AU - Menke, S. Matthew

N1 - KAUST Repository Item: Exported on 2021-04-13 Acknowledgements: The authors thank the Engineering and Physical Sciences Research Council (EPSRC) and the Winton Programme for the Physics of Sustainability. Y.T. was supported by JSPS Postdoctoral Fellowships for Research Abroad. Work at Georgia Tech was supported by the Department of the Navy, Office of Naval Research award no. N00014-14-1-0580 (CAOP MURI) and through a State-Sponsored Scholarship for Graduate Students to Y.F. from the China Scholarship Council. S.M.M. and R.H.F acknowledge support from the KAUST Competitive Research Grant Program. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2017/11/17

Y1 - 2017/11/17

N2 - Rapid, long-range charge separation in polymer-fullerene organic solar cells (OSCs) enables electrons and holes to move beyond their Coulomb capture radius and overcome geminate recombination. Understanding the nature of charge generation and recombination mechanisms in efficient, nonfullerene-acceptor-based OSCs are critical to further improve device performance. Here we report charge dynamics in an OSC using a perylene diimide (PDI) dimer acceptor. We use transient absorption spectroscopy to track the time evolution of electroabsorption caused by the dipolar electric field generated between electron-hole pairs as they separate after ionization at the donor-acceptor interface. We show that charges separate rapidly (

AB - Rapid, long-range charge separation in polymer-fullerene organic solar cells (OSCs) enables electrons and holes to move beyond their Coulomb capture radius and overcome geminate recombination. Understanding the nature of charge generation and recombination mechanisms in efficient, nonfullerene-acceptor-based OSCs are critical to further improve device performance. Here we report charge dynamics in an OSC using a perylene diimide (PDI) dimer acceptor. We use transient absorption spectroscopy to track the time evolution of electroabsorption caused by the dipolar electric field generated between electron-hole pairs as they separate after ionization at the donor-acceptor interface. We show that charges separate rapidly (

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JO - ACS Nano

JF - ACS Nano

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ER -

Ultrafast Long-Range Charge Separation in Nonfullerene Organic Solar Cells

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