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Excitons Bound to Defect Complexes in Heavily Doped CdS
Author(s) -
Georgobiani A. N.,
Gruzintsev A. N.,
Zayats A. V.
Publication year - 1991
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.2221640121
Subject(s) - exciton , doping , luminescence , alkali metal , acceptor , lithium (medication) , biexciton , recombination , materials science , range (aeronautics) , chemistry , atomic physics , molecular physics , crystallography , condensed matter physics , optoelectronics , physics , medicine , organic chemistry , endocrinology , composite material , biochemistry , gene
The fine structure of the luminescence due to bound excitons is found in CdS crystals doped with alkali metals (AM): lithium or sodium 10 18 to 10 20 cm −3 . In the spectral range of the acceptor–exciton complex emission the optical transitions are explained as recombination of excitons bound to the complexes of nearby‐located defects [AM cd Cd i ] or [AM cd AM i ] with different distances between components: 0.2 to 0.6 nm. The Haynes rule yields E ex / E compl = 0.14 for such excitons.