Time-resolved study of free exciton luminescence in KI and RbI

Temporal behaviours of free exciton luminescence in KI and RbI have been studied with picosecond light pulses under excitation in the n = 1 exciton absorption region. The decay curves are explained by one-dimensional diffusion and self-trapping of free excitons, which are represented by t −1 2 and a...

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Bibliographic Details
Published in:Solid state communications 1998-03, Vol.105 (11), p.681-684
Main Authors: Tsujibayashi, Toru, Toyoda, Koichi, Hayashi, Tetsusuke
Format: Article
Language:English
Subjects:
A. insulators
Condensed matter: electronic structure, electrical, magnetic, and optical properties
E. luminescence
E. time-resolved optical spectroscopies
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
Other solid inorganic materials
Photoluminescence
Physics
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Summary:Temporal behaviours of free exciton luminescence in KI and RbI have been studied with picosecond light pulses under excitation in the n = 1 exciton absorption region. The decay curves are explained by one-dimensional diffusion and self-trapping of free excitons, which are represented by t −1 2 and an exponential function, respectively. The exponential decay constant is 0.35 ns for KI and 1.7 ns for RbI at around 10 K.
ISSN:0038-1098
1879-2766
DOI:10.1016/S0038-1098(97)10218-6