Interfacial charge separation and trapping in a photovoltaic polymer blend observed with ultrafast vibrational spectroscopy

Ryan D. Pensack; Kyle M. Banyas; Larry W. Barbour; John B. Asbury

doi:10.1117/12.796100

Interfacial charge separation and trapping in a photovoltaic polymer blend observed with ultrafast vibrational spectroscopy

Ryan D. Pensack, Kyle M. Banyas, Larry W. Barbour, John B. Asbury

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

Abstract

The dynamics of photoinduced charge separation, recombination and trapping are examined in a polymer blend photovoltaic material with ultrafast visible pump - infrared probe and time-resolved infrared spectroscopy. The carbonyl (C=O) stretch of methanofullerene [6,6]-phenyl C₆₁-butyric acid methyl ester (PCBM) is probed as a local vibrational reporter of the dynamics in a blend with a poly(p-phenylenevinylene) (PPV) -based conjugated polymer, CN-MEH-PPV. Following interfacial electron transfer, geminate electron - hole pair dissociation occurs on ultrafast timescales. Subsequent to this charge separation process, charge carriers become trapped on the microsecond timescale resulting in the formation of a distinct peak in the vibrational spectra corresponding to the anion of PCBM. The charge trapping dynamics correspond to the carrier lifetime of similar PPV-based polymer blends as reported in photocurrent transients from the literature.

Original language	English (US)
Title of host publication	Physical Chemistry of Interfaces and Nanomaterials VII
DOIs	https://doi.org/10.1117/12.796100
State	Published - 2008
Event	Physical Chemistry of Interfaces and Nanomaterials VII - San Diego, CA, United States Duration: Aug 11 2008 → Aug 12 2008

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	7034
ISSN (Print)	0277-786X

Other

Other	Physical Chemistry of Interfaces and Nanomaterials VII
Country/Territory	United States
City	San Diego, CA
Period	8/11/08 → 8/12/08

All Science Journal Classification (ASJC) codes

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1117/12.796100

Cite this

Pensack, R. D., Banyas, K. M., Barbour, L. W., & Asbury, J. B. (2008). Interfacial charge separation and trapping in a photovoltaic polymer blend observed with ultrafast vibrational spectroscopy. In Physical Chemistry of Interfaces and Nanomaterials VII Article 703404 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7034). https://doi.org/10.1117/12.796100

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title = "Interfacial charge separation and trapping in a photovoltaic polymer blend observed with ultrafast vibrational spectroscopy",

abstract = "The dynamics of photoinduced charge separation, recombination and trapping are examined in a polymer blend photovoltaic material with ultrafast visible pump - infrared probe and time-resolved infrared spectroscopy. The carbonyl (C=O) stretch of methanofullerene [6,6]-phenyl C61-butyric acid methyl ester (PCBM) is probed as a local vibrational reporter of the dynamics in a blend with a poly(p-phenylenevinylene) (PPV) -based conjugated polymer, CN-MEH-PPV. Following interfacial electron transfer, geminate electron - hole pair dissociation occurs on ultrafast timescales. Subsequent to this charge separation process, charge carriers become trapped on the microsecond timescale resulting in the formation of a distinct peak in the vibrational spectra corresponding to the anion of PCBM. The charge trapping dynamics correspond to the carrier lifetime of similar PPV-based polymer blends as reported in photocurrent transients from the literature.",

author = "Pensack, {Ryan D.} and Banyas, {Kyle M.} and Barbour, {Larry W.} and Asbury, {John B.}",

year = "2008",

doi = "10.1117/12.796100",

language = "English (US)",

isbn = "9780819472540",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

booktitle = "Physical Chemistry of Interfaces and Nanomaterials VII",

note = "Physical Chemistry of Interfaces and Nanomaterials VII ; Conference date: 11-08-2008 Through 12-08-2008",

}

Pensack, RD, Banyas, KM, Barbour, LW & Asbury, JB 2008, Interfacial charge separation and trapping in a photovoltaic polymer blend observed with ultrafast vibrational spectroscopy. in Physical Chemistry of Interfaces and Nanomaterials VII., 703404, Proceedings of SPIE - The International Society for Optical Engineering, vol. 7034, Physical Chemistry of Interfaces and Nanomaterials VII, San Diego, CA, United States, 8/11/08. https://doi.org/10.1117/12.796100

Interfacial charge separation and trapping in a photovoltaic polymer blend observed with ultrafast vibrational spectroscopy. / Pensack, Ryan D.; Banyas, Kyle M.; Barbour, Larry W. et al.
Physical Chemistry of Interfaces and Nanomaterials VII. 2008. 703404 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7034).

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

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T1 - Interfacial charge separation and trapping in a photovoltaic polymer blend observed with ultrafast vibrational spectroscopy

AU - Pensack, Ryan D.

AU - Banyas, Kyle M.

AU - Barbour, Larry W.

AU - Asbury, John B.

PY - 2008

Y1 - 2008

N2 - The dynamics of photoinduced charge separation, recombination and trapping are examined in a polymer blend photovoltaic material with ultrafast visible pump - infrared probe and time-resolved infrared spectroscopy. The carbonyl (C=O) stretch of methanofullerene [6,6]-phenyl C61-butyric acid methyl ester (PCBM) is probed as a local vibrational reporter of the dynamics in a blend with a poly(p-phenylenevinylene) (PPV) -based conjugated polymer, CN-MEH-PPV. Following interfacial electron transfer, geminate electron - hole pair dissociation occurs on ultrafast timescales. Subsequent to this charge separation process, charge carriers become trapped on the microsecond timescale resulting in the formation of a distinct peak in the vibrational spectra corresponding to the anion of PCBM. The charge trapping dynamics correspond to the carrier lifetime of similar PPV-based polymer blends as reported in photocurrent transients from the literature.

AB - The dynamics of photoinduced charge separation, recombination and trapping are examined in a polymer blend photovoltaic material with ultrafast visible pump - infrared probe and time-resolved infrared spectroscopy. The carbonyl (C=O) stretch of methanofullerene [6,6]-phenyl C61-butyric acid methyl ester (PCBM) is probed as a local vibrational reporter of the dynamics in a blend with a poly(p-phenylenevinylene) (PPV) -based conjugated polymer, CN-MEH-PPV. Following interfacial electron transfer, geminate electron - hole pair dissociation occurs on ultrafast timescales. Subsequent to this charge separation process, charge carriers become trapped on the microsecond timescale resulting in the formation of a distinct peak in the vibrational spectra corresponding to the anion of PCBM. The charge trapping dynamics correspond to the carrier lifetime of similar PPV-based polymer blends as reported in photocurrent transients from the literature.

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M3 - Conference contribution

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T2 - Physical Chemistry of Interfaces and Nanomaterials VII

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Interfacial charge separation and trapping in a photovoltaic polymer blend observed with ultrafast vibrational spectroscopy

Abstract

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