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Frenkel Exciton Model of Low Temperature Photoluminescence in α‐PTCDA Single Crystals
Author(s) -
Scholz R.,
Vragović I.,
Kobitski A.Yu.,
Schreiber M.,
Wagner H.P.,
Zahn D.R.T.
Publication year - 2002
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200211)234:1<402::aid-pssb402>3.0.co;2-a
Subject(s) - exciton , photoluminescence , recombination , atmospheric temperature range , semiconductor , materials science , range (aeronautics) , dispersion (optics) , optoelectronics , molecular physics , condensed matter physics , physics , chemistry , optics , thermodynamics , biochemistry , composite material , gene
Recent studies of the recombination dynamics in α‐PTCDA (3, 4, 9, 10 perylene tetracarboxylic dianhydride) with time‐resolved photoluminescence (PL) techniques in the 100 ns range have revealed six distinct PL contributions. In the present work, we demonstrate that the PL channel dominating at low temperature ( T = 11 K) can be assigned to recombination from an indirect minimum of the dispersion of Frenkel excitons. The approach used is a straightforward extension of previous calculations applied to the linear optical properties of this prototypic molecular semiconductor.