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

Autor:	Paul D. Cunningham, Alex K.-Y. Jen, Hin-Lap Yip, L. Michael Hayden
Rok vydání:	2009
Předmět:	Materials science business.industry Terahertz radiation Exciton Quantum yield Charge (physics) Surfaces Coatings and Films Photoexcitation Optical pumping Chemical physics Materials Chemistry Optoelectronics Charge carrier Physical and Theoretical Chemistry business Spectroscopy
Zdroj:	The Journal of Physical Chemistry B. 113:15427-15432
ISSN:	1520-5207 1520-6106
Popis:	We report charge carrier dynamics in solid films of a series of metalated polymers based on Pt- and 4,7-di-2'-thienyl-2,1,3,-benzothiadiazole or 4,7-di-2'-thienothienyl-2,1,3,-benzothiadiazole upon photoexcitation of the pi-pi* 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbdef7d52576d826523f2ecc45a6f201 https://doi.org/10.1021/jp906454g Zobrazit plný text záznamu