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Excitation mechanisms and excited states of the I 1 bound exciton in CdS
Author(s) -
Baumert R.,
Gutowski J.
Publication year - 1981
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.2221070233
Subject(s) - exciton , excited state , excitation , atomic physics , biexciton , physics , bound state , molecular physics , condensed matter physics , quantum mechanics
Abstract For the neutral‐acceptor‐bound exciton emission (I 1 ) of CdS three new excitation lines with light E ⟂ c are found at 1.2, 2.5, and 3.7 meV on the high energy side of the I 1 line. The nearest one is interpreted as due to the simultaneous excitation of the bound exciton and a transverse‐acoustic phonon. The other two are understood as the direct creation of the I 1 bound exciton in excited states with one of the equal holes belonging to a higher configuration. With light E ‖ c the excitation mechanisms via the free exciton states A L and A F and the bound exciton states I 1B and I 1B are discussed. An excitation intensity dependent energy shift of the long wavelength tail of the band edge is reported for the first time.