TY - JOUR
T1 - Femtosecond transient absorption study of oriented poly(9,9-dioctylfluorene) film
T2 - Hot carriers, excitons, and charged polarons
AU - Xu, S.
AU - Klimov, Victor I
AU - Kraabel, B.
AU - Wang, H.
AU - McBranch, D. W.
PY - 2001/11/15
Y1 - 2001/11/15
N2 - We present a transient absorption spectroscopy study of oriented poly(9,9-dioctylfluorene) film. By comparing the spectral features and dynamics at different wavelengths using different probe polarizations, we conclude that three species are generated after the photoexcitation: hot carriers, excitons, and charged polarons. The charged polaron spectrum is measured with the probe beam polarized perpendicular to the polymer chains, and two bands are recognized. In addition, a new band in mid-IR regime is observed that decays faster than excitons, and whose peak shifts in time. This feature is assigned to hot carriers.
AB - We present a transient absorption spectroscopy study of oriented poly(9,9-dioctylfluorene) film. By comparing the spectral features and dynamics at different wavelengths using different probe polarizations, we conclude that three species are generated after the photoexcitation: hot carriers, excitons, and charged polarons. The charged polaron spectrum is measured with the probe beam polarized perpendicular to the polymer chains, and two bands are recognized. In addition, a new band in mid-IR regime is observed that decays faster than excitons, and whose peak shifts in time. This feature is assigned to hot carriers.
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M3 - Article
AN - SCOPUS:0035891026
VL - 64
SP - 1932011
EP - 1932014
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 19
M1 - 193201
ER -