Charge Carrier Dynamics in Metalated Polymers Investigated by Optical-Pump Terahertz-Probe Spectroscopy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)15427-15432
Journal / PublicationJournal of Physical Chemistry B
Volume113
Issue number47
Online published3 Nov 2009
Publication statusPublished - 26 Nov 2009
Externally publishedYes

Abstract

We report charge carrier dynamics in solid films of a series of metalated polymers based on Pt- and 4,7-di2'-thienyl-2,1,3,-benzothiadiazole or 4,7-di-2'-thienothienyl-2,1,3,-benzothiadiazole upon photoexcitation of the π-π* transition using optical-pump terahertz-probe spectroscopy. Subpicosecond generated charge carriers recombine within 100 ps, but bound excitons persist. Application of the Drude-Smith model allows for estimation of the intrinsic mobility and internal quantum yield of charge carrier generation in these films. Thermal annealing is found to have no effect on nanometer scale charge transport. © 2009 American Chemical Society.

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