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Triplet Molecular Excitations in Potassium Halide Cyanide Crystals. II. The K(CN) x Cl 1– x Mixed System
Author(s) -
Camargo S. S.,
von der Weid J. P.
Publication year - 1989
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/pssb.2221530236
Subject(s) - excited state , halide , luminescence , chemistry , ion , cyanide , excitation , phosphorescence , atomic physics , crystallography , inorganic chemistry , materials science , physics , fluorescence , organic chemistry , optoelectronics , quantum mechanics
The decay kinetics and luminescence intensity of the UV emission associated with the a 3 II → X 1 Σ + electronic transitions of the CN – molecular ions in K(CN) x Cl 1– x mixed crystals are investigated between 10 and 450 K. At the lowest temperatures the emission lifetimes as functions of the CN – concentration x show a transition between localized and collective behaviours around the percolation threshold for the CN – sublattice. A low temperature non‐radiative decay process is observed and is attributed to the coupling of the relaxed excited states of CN – clusters to translational–rotational cyanide‐like phonon modes.
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