Time-Resolved Raman Spectroscopy of Polaron Formation in a Polymer Photocatalyst



Piercy, Verity L, Saeed, Khezar H, Prentice, Andrew W, Neri, Gaia, Li, Chao, Gardner, Adrian M, Bai, Yang, Sprick, Reiner Sebastian, Sazanovich, Igor V, Cooper, Andrew I
et al (show 3 more authors) (2021) Time-Resolved Raman Spectroscopy of Polaron Formation in a Polymer Photocatalyst. JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 12 (44). pp. 10899-10905.

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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 H<sub>2</sub>, 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 (TR<sup>3</sup>) spectroscopy to study the formation of polaron pairs and electron polarons in one of the most active linear polymer photocatalysts for H<sub>2</sub> production, poly(dibenzo[<i>b</i>,<i>d</i>]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.

Item Type: Article
Uncontrolled Keywords: 3403 Macromolecular and Materials Chemistry, 34 Chemical Sciences, 3406 Physical Chemistry
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 04 Nov 2021 11:45
Last Modified: 20 Jun 2024 16:59
DOI: 10.1021/acs.jpclett.1c03073
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3142751