Time-resolved emission spectra of the BIC J-aggregate at low temperature

A red-shift and broadening of the emission of the BIC J-aggregate in glass were observed at low temperatures (4.5 K). To explain the observation a transformation of the excess excitation energy in the bath with disordering of the structure of molecular aggregate is proposed. The characteristic time...

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Bibliographic Details
Published in:Chemical physics letters 1993-10, Vol.213 (5), p.559-563
Main Authors: Kamalov, Valey F., Struganova, Irina A., Yoshihara, Keitaro
Format: Article
Language:English
Subjects:
Atomic and molecular clusters
Atomic and molecular physics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Exact sciences and technology
Excitons and related phenomena
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Physics
Studies of special atoms, molecules and their ions
clusters
Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter
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Summary:A red-shift and broadening of the emission of the BIC J-aggregate in glass were observed at low temperatures (4.5 K). To explain the observation a transformation of the excess excitation energy in the bath with disordering of the structure of molecular aggregate is proposed. The characteristic time of this energy transformation is 315 ps at 4.5 K for an excess energy of 400 cm −1. Another possible mechanism of exciton self-trapping by exciton-phonon interaction is discussed.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(93)89160-J