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

Time-Resolved Raman Spectroscopy of Polaron Formation in a Polymer Photocatalyst.
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DOI:
10.1021/acs.jpclett.1c03073
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发表时间:
2021-11-11
期刊:
The journal of physical chemistry letters
影响因子:
--
通讯作者:
Cowan AJ
Cowan AJ
中科院分区:
其他
文献类型:
--
作者:
Piercy VL;Saeed KH;Prentice AW;Neri G;Li C;Gardner AM;Bai Y;Sprick RS;Sazanovich IV;Cooper AI;Rosseinsky MJ;Zwijnenburg MA;Cowan AJ

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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.
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