Time-resolved Raman spectroscopy of polaron formation in a polymer photocatalyst

Verity L Piercy; Khezar H Saeed; Andrew W Prentice; Gaia Neri; Chao Li; Adrian M Gardner; Yang Bai; Reiner Sebastian Sprick; Igor V Sazanovich; Andrew I Cooper; Matthew J Rosseinsky; Martijn A Zwijnenburg; Alexander J Cowan

doi:10.1021/acs.jpclett.1c03073

Time-resolved Raman spectroscopy of polaron formation in a polymer photocatalyst

Verity L Piercy, Khezar H Saeed, Andrew W Prentice, Gaia Neri, Chao Li, Adrian M Gardner, Yang Bai, Reiner Sebastian Sprick, Igor V Sazanovich, Andrew I Cooper, Matthew J Rosseinsky, Martijn A Zwijnenburg, Alexander J Cowan

Pure And Applied Chemistry

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Abstract

Polymer photocatalysts are a synthetically diverse class of materials that can be used for the production of solar fuels such as H2, but the underlying mechanisms by which they operate are poorly understood. Time-resolved vibrational spectroscopy provides a powerful structure-specific probe of photogenerated species. Here we report the use of time-resolved resonance Raman (TR3) spectroscopy to study the formation of polaron pairs and electron polarons in one of the most active linear polymer photocatalysts for H2 production, poly(dibenzo[b,d]thiophene sulfone), P10. We identify that polaron-pair formation prior to thermalization of the initially generated excited states is an important pathway for the generation of long-lived photoelectrons.

Original language	English
Pages (from-to)	10899-10905
Number of pages	7
Journal	Journal of Physical Chemistry Letters
Volume	12
Issue number	44
Early online date	3 Nov 2021
DOIs	https://doi.org/10.1021/acs.jpclett.1c03073
Publication status	Published - 11 Nov 2021

Keywords

polymer photocatalysts
solar fuels
Raman (TR3) spectroscopy

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10.1021/acs.jpclett.1c03073Licence: CC BY 4.0

Piercy-etal-JPCL-2021-Time-resolved-Raman-spectroscopy-of-polaron-formation-in-a-polymer-photocatalystFinal published version, 1.9 MBLicence: CC BY 4.0

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Piercy, V. L., Saeed, K. H., Prentice, A. W., Neri, G., Li, C., Gardner, A. M., Bai, Y., Sprick, R. S., Sazanovich, I. V., Cooper, A. I., Rosseinsky, M. J., Zwijnenburg, M. A., & Cowan, A. J. (2021). Time-resolved Raman spectroscopy of polaron formation in a polymer photocatalyst. Journal of Physical Chemistry Letters, 12(44), 10899-10905. https://doi.org/10.1021/acs.jpclett.1c03073

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title = "Time-resolved Raman spectroscopy of polaron formation in a polymer photocatalyst",

abstract = "Polymer photocatalysts are a synthetically diverse class of materials that can be used for the production of solar fuels such as H2, but the underlying mechanisms by which they operate are poorly understood. Time-resolved vibrational spectroscopy provides a powerful structure-specific probe of photogenerated species. Here we report the use of time-resolved resonance Raman (TR3) spectroscopy to study the formation of polaron pairs and electron polarons in one of the most active linear polymer photocatalysts for H2 production, poly(dibenzo[b,d]thiophene sulfone), P10. We identify that polaron-pair formation prior to thermalization of the initially generated excited states is an important pathway for the generation of long-lived photoelectrons.",

keywords = "polymer photocatalysts, solar fuels, Raman (TR3) spectroscopy",

author = "Piercy, {Verity L} and Saeed, {Khezar H} and Prentice, {Andrew W} and Gaia Neri and Chao Li and Gardner, {Adrian M} and Yang Bai and Sprick, {Reiner Sebastian} and Sazanovich, {Igor V} and Cooper, {Andrew I} and Rosseinsky, {Matthew J} and Zwijnenburg, {Martijn A} and Cowan, {Alexander J}",

year = "2021",

month = nov,

day = "11",

doi = "10.1021/acs.jpclett.1c03073",

language = "English",

volume = "12",

pages = "10899--10905",

journal = "Journal of Physical Chemistry Letters",

issn = "1948-7185",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Time-resolved Raman spectroscopy of polaron formation in a polymer photocatalyst

AU - Piercy, Verity L

AU - Saeed, Khezar H

AU - Prentice, Andrew W

AU - Neri, Gaia

AU - Li, Chao

AU - Gardner, Adrian M

AU - Bai, Yang

AU - Sprick, Reiner Sebastian

AU - Sazanovich, Igor V

AU - Cooper, Andrew I

AU - Rosseinsky, Matthew J

AU - Zwijnenburg, Martijn A

AU - Cowan, Alexander J

PY - 2021/11/11

Y1 - 2021/11/11

N2 - Polymer photocatalysts are a synthetically diverse class of materials that can be used for the production of solar fuels such as H2, but the underlying mechanisms by which they operate are poorly understood. Time-resolved vibrational spectroscopy provides a powerful structure-specific probe of photogenerated species. Here we report the use of time-resolved resonance Raman (TR3) spectroscopy to study the formation of polaron pairs and electron polarons in one of the most active linear polymer photocatalysts for H2 production, poly(dibenzo[b,d]thiophene sulfone), P10. We identify that polaron-pair formation prior to thermalization of the initially generated excited states is an important pathway for the generation of long-lived photoelectrons.

AB - Polymer photocatalysts are a synthetically diverse class of materials that can be used for the production of solar fuels such as H2, but the underlying mechanisms by which they operate are poorly understood. Time-resolved vibrational spectroscopy provides a powerful structure-specific probe of photogenerated species. Here we report the use of time-resolved resonance Raman (TR3) spectroscopy to study the formation of polaron pairs and electron polarons in one of the most active linear polymer photocatalysts for H2 production, poly(dibenzo[b,d]thiophene sulfone), P10. We identify that polaron-pair formation prior to thermalization of the initially generated excited states is an important pathway for the generation of long-lived photoelectrons.

KW - polymer photocatalysts

KW - solar fuels

KW - Raman (TR3) spectroscopy

U2 - 10.1021/acs.jpclett.1c03073

DO - 10.1021/acs.jpclett.1c03073

M3 - Article

C2 - 34730969

SN - 1948-7185

VL - 12

SP - 10899

EP - 10905

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 44

ER -

Time-resolved Raman spectroscopy of polaron formation in a polymer photocatalyst

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