Details
| Original language | English |
|---|---|
| Pages (from-to) | 9-15 |
| Number of pages | 7 |
| Journal | Chemical Physics Letters |
| Volume | 314 |
| Issue number | 1-2 |
| Publication status | Published - 26 Nov 1999 |
| Externally published | Yes |
Abstract
We compare picosecond time-resolved photoluminescence spectra of thin polycrystalline films of quaterthiophene (4T) vapour deposited on two different substrates: highly oriented pyrolytic graphite (HOPG) and glass. At zero time delay, both films show the same highly resolved vibrational fine structure as isolated 4T molecules. The fine structure remains over time on HOPG, but vanishes within the first 100 ps on glass and is replaced by emission from two luminescent traps. The results explain the line broadening in time-integrated (cw) spectra and yield information on the luminescence quenching in polycrystalline organic films.
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In: Chemical Physics Letters, Vol. 314, No. 1-2, 26.11.1999, p. 9-15.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Relaxation dynamics of excitons in thin quaterthiophene films on different substrates
AU - Hopmeier, M.
AU - Gebauer, W.
AU - Oestreich, Michael
AU - Sokolowski, M.
AU - Umbach, E.
AU - Mahrt, R. F.
N1 - Funding information: We thank Dr. Naarmann, BASF AG, for providing the 4T material. We are grateful to Prof. H. Bässler, Prof. W.W. Rühle, and Dr. H. Egelhaaf for stimulating discussions. This work was supported by the Deutsche Forschungsgemeinschaft through SFB383 and through project Um 6/4-1. Financial support by the Fond der Chemischen Industrie is gratefully acknowledged.
PY - 1999/11/26
Y1 - 1999/11/26
N2 - We compare picosecond time-resolved photoluminescence spectra of thin polycrystalline films of quaterthiophene (4T) vapour deposited on two different substrates: highly oriented pyrolytic graphite (HOPG) and glass. At zero time delay, both films show the same highly resolved vibrational fine structure as isolated 4T molecules. The fine structure remains over time on HOPG, but vanishes within the first 100 ps on glass and is replaced by emission from two luminescent traps. The results explain the line broadening in time-integrated (cw) spectra and yield information on the luminescence quenching in polycrystalline organic films.
AB - We compare picosecond time-resolved photoluminescence spectra of thin polycrystalline films of quaterthiophene (4T) vapour deposited on two different substrates: highly oriented pyrolytic graphite (HOPG) and glass. At zero time delay, both films show the same highly resolved vibrational fine structure as isolated 4T molecules. The fine structure remains over time on HOPG, but vanishes within the first 100 ps on glass and is replaced by emission from two luminescent traps. The results explain the line broadening in time-integrated (cw) spectra and yield information on the luminescence quenching in polycrystalline organic films.
UR - http://www.scopus.com/inward/record.url?scp=0001922304&partnerID=8YFLogxK
U2 - 10.1016/S0009-2614(99)01116-1
DO - 10.1016/S0009-2614(99)01116-1
M3 - Article
AN - SCOPUS:0001922304
VL - 314
SP - 9
EP - 15
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 1-2
ER -