Transient spectroscopy of Frenkel excitons in α-hexathiophene single crystals

S. V. Frolov; Ch Kloc; S. Berg; G. A. Thomas; B. Batlogg

doi:10.1016/S0009-2614(00)00823-X

Transient spectroscopy of Frenkel excitons in α-hexathiophene single crystals

S. V. Frolov, Ch Kloc, S. Berg, G. A. Thomas, B. Batlogg

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Photoexcitation dynamics in pure single molecular crystals of α-hexathiophene are studied using ultrafast photomodulation spectroscopy in the spectral range from 0.15 to 2.3 eV. Frenkel excitons are uniquely described by transient photoinduced absorption and stimulated emission bands at 1.3 and ~2 eV, respectively. The transient spectra are interpreted using exciton states identified by one- and two-photon absorption. Exciton dynamics in pure crystals dramatically differs from that in polycrystalline films, which is attributed to a much lower defect density in single crystals. Intramolecular internal conversion rate is found to be ~150 fs for excitation energies up to 3.6 eV.

Original language	English (US)
Pages (from-to)	558-566
Number of pages	9
Journal	Chemical Physics Letters
Volume	326
Issue number	5-6
DOIs	https://doi.org/10.1016/S0009-2614(00)00823-X
State	Published - Aug 25 2000
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/S0009-2614(00)00823-X

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title = "Transient spectroscopy of Frenkel excitons in α-hexathiophene single crystals",

abstract = "Photoexcitation dynamics in pure single molecular crystals of α-hexathiophene are studied using ultrafast photomodulation spectroscopy in the spectral range from 0.15 to 2.3 eV. Frenkel excitons are uniquely described by transient photoinduced absorption and stimulated emission bands at 1.3 and ~2 eV, respectively. The transient spectra are interpreted using exciton states identified by one- and two-photon absorption. Exciton dynamics in pure crystals dramatically differs from that in polycrystalline films, which is attributed to a much lower defect density in single crystals. Intramolecular internal conversion rate is found to be ~150 fs for excitation energies up to 3.6 eV.",

author = "Frolov, {S. V.} and Ch Kloc and S. Berg and Thomas, {G. A.} and B. Batlogg",

year = "2000",

month = aug,

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doi = "10.1016/S0009-2614(00)00823-X",

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journal = "Chemical Physics Letters",

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TY - JOUR

T1 - Transient spectroscopy of Frenkel excitons in α-hexathiophene single crystals

AU - Frolov, S. V.

AU - Kloc, Ch

AU - Berg, S.

AU - Thomas, G. A.

AU - Batlogg, B.

PY - 2000/8/25

Y1 - 2000/8/25

N2 - Photoexcitation dynamics in pure single molecular crystals of α-hexathiophene are studied using ultrafast photomodulation spectroscopy in the spectral range from 0.15 to 2.3 eV. Frenkel excitons are uniquely described by transient photoinduced absorption and stimulated emission bands at 1.3 and ~2 eV, respectively. The transient spectra are interpreted using exciton states identified by one- and two-photon absorption. Exciton dynamics in pure crystals dramatically differs from that in polycrystalline films, which is attributed to a much lower defect density in single crystals. Intramolecular internal conversion rate is found to be ~150 fs for excitation energies up to 3.6 eV.

AB - Photoexcitation dynamics in pure single molecular crystals of α-hexathiophene are studied using ultrafast photomodulation spectroscopy in the spectral range from 0.15 to 2.3 eV. Frenkel excitons are uniquely described by transient photoinduced absorption and stimulated emission bands at 1.3 and ~2 eV, respectively. The transient spectra are interpreted using exciton states identified by one- and two-photon absorption. Exciton dynamics in pure crystals dramatically differs from that in polycrystalline films, which is attributed to a much lower defect density in single crystals. Intramolecular internal conversion rate is found to be ~150 fs for excitation energies up to 3.6 eV.

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U2 - 10.1016/S0009-2614(00)00823-X

DO - 10.1016/S0009-2614(00)00823-X

M3 - Article

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SN - 0009-2614

VL - 326

SP - 558

EP - 566

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 5-6

ER -

Transient spectroscopy of Frenkel excitons in α-hexathiophene single crystals

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