Ultrafast Excitation Transfer and Trapping in a Thin Polymer Film.

Mette Grage; Yuri Zausjitsyn; Arkady Yartsev; Mirianas Chachisvilis; Villy Sundström; Tönu Pullerits

doi:10.1103/PhysRevB.67.205207

Ultrafast Excitation Transfer and Trapping in a Thin Polymer Film.

Mette Grage, Yuri Zausjitsyn, Arkady Yartsev, Mirianas Chachisvilis, Villy Sundström, Tönu Pullerits

Kemisk fysik

Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

Sammanfattning

Transient absorption anisotropy of a polythiophene polymer in a thin film was studied on a femtosecond time scale. The anisotropy has a non-exponential decay on the sub-picosecond time scale, with a fastest component characterized by an ∼40 fs time constant. To simulate the anisotropy decay an incoherent energy migration model has been used. Comparison between the simulated and experimental kinetics enabled us to estimate the nearest-neighbor pair wise hopping time (τh=1±0.1 ps), the fraction of the interchain aggregates (∼10%) and the structural disorder of the polymer. The initial ∼30 fs anisotropy decay does not originate from incoherent hopping energy transfer but from some other relaxation among electronic excited states within a spectroscopic unit.

Originalspråk	engelska
Sidor (från-till)	205207-1-205207-5
Tidskrift	Physical Review B (Condensed Matter and Materials Physics)
Volym	67
Nummer	20
DOI	https://doi.org/10.1103/PhysRevB.67.205207
Status	Published - 2003

Bibliografisk information

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Chemical Physics (S) (011001060)

Ämnesklassifikation (UKÄ)

Atom- och molekylfysik och optik (Här ingår: Kemisk fysik, kvantoptik)

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10.1103/PhysRevB.67.205207

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title = "Ultrafast Excitation Transfer and Trapping in a Thin Polymer Film.",

abstract = "Transient absorption anisotropy of a polythiophene polymer in a thin film was studied on a femtosecond time scale. The anisotropy has a non-exponential decay on the sub-picosecond time scale, with a fastest component characterized by an ∼40 fs time constant. To simulate the anisotropy decay an incoherent energy migration model has been used. Comparison between the simulated and experimental kinetics enabled us to estimate the nearest-neighbor pair wise hopping time (τh=1±0.1 ps), the fraction of the interchain aggregates (∼10%) and the structural disorder of the polymer. The initial ∼30 fs anisotropy decay does not originate from incoherent hopping energy transfer but from some other relaxation among electronic excited states within a spectroscopic unit.",

author = "Mette Grage and Yuri Zausjitsyn and Arkady Yartsev and Mirianas Chachisvilis and Villy Sundstr{\"o}m and T{\"o}nu Pullerits",

note = "The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)",

year = "2003",

doi = "10.1103/PhysRevB.67.205207",

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AU - Zausjitsyn, Yuri

AU - Yartsev, Arkady

AU - Chachisvilis, Mirianas

AU - Sundström, Villy

AU - Pullerits, Tönu

N1 - The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)

PY - 2003

Y1 - 2003

N2 - Transient absorption anisotropy of a polythiophene polymer in a thin film was studied on a femtosecond time scale. The anisotropy has a non-exponential decay on the sub-picosecond time scale, with a fastest component characterized by an ∼40 fs time constant. To simulate the anisotropy decay an incoherent energy migration model has been used. Comparison between the simulated and experimental kinetics enabled us to estimate the nearest-neighbor pair wise hopping time (τh=1±0.1 ps), the fraction of the interchain aggregates (∼10%) and the structural disorder of the polymer. The initial ∼30 fs anisotropy decay does not originate from incoherent hopping energy transfer but from some other relaxation among electronic excited states within a spectroscopic unit.

AB - Transient absorption anisotropy of a polythiophene polymer in a thin film was studied on a femtosecond time scale. The anisotropy has a non-exponential decay on the sub-picosecond time scale, with a fastest component characterized by an ∼40 fs time constant. To simulate the anisotropy decay an incoherent energy migration model has been used. Comparison between the simulated and experimental kinetics enabled us to estimate the nearest-neighbor pair wise hopping time (τh=1±0.1 ps), the fraction of the interchain aggregates (∼10%) and the structural disorder of the polymer. The initial ∼30 fs anisotropy decay does not originate from incoherent hopping energy transfer but from some other relaxation among electronic excited states within a spectroscopic unit.

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DO - 10.1103/PhysRevB.67.205207

M3 - Article

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JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

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ER -

Ultrafast Excitation Transfer and Trapping in a Thin Polymer Film.

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