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Shallow Acceptors in Cadmium Telluride
Author(s) -
Molva F.,
Chamonal J. P.,
Pautrat J. L.
Publication year - 1982
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.2221090222
Subject(s) - cadmium telluride photovoltaics , acceptor , ionization , impurity , ionization energy , photoluminescence , doping , conduction band , spectroscopy , materials science , atomic physics , condensed matter physics , chemistry , ion , physics , optoelectronics , electron , organic chemistry , quantum mechanics
The photoluminescence spectroscopy of undoped CdTe crystals provides information on two acceptors which are the main contaminants of as‐grown crystals. These acceptors called y and z have their respective ionization energies at 147 and 108 meV. A complete series of two hole replicas is observed for y and only one for z. These acceptors are believed to be due to Cu and Ag impurities. Backdoping experiments with Li and Na give rise to new transitions. From the conduction band–acceptor level transitions, the ionization energies are respectively obtained to 57.8 and 58.8 meV. In the case of Li, some extra‐lines are tentatively identified as phonon interacting two‐hole transitions.