Abstract
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.
| Original language | English |
|---|---|
| Article number | 193201 |
| Pages (from-to) | 1932011-1932014 |
| Number of pages | 4 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 64 |
| Issue number | 19 |
| Publication status | Published - Nov 15 2001 |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Femtosecond transient absorption study of oriented poly(9,9-dioctylfluorene) film : Hot carriers, excitons, and charged polarons. / Xu, S.; Klimov, Victor I; Kraabel, B.; Wang, H.; McBranch, D. W.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 64, No. 19, 193201, 15.11.2001, p. 1932011-1932014.Research output: Contribution to journal › Article
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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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UR - http://www.scopus.com/inward/citedby.url?scp=0035891026&partnerID=8YFLogxK
M3 - Article
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 -