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Infrared Absorption by Ag, Cu, and Au Acceptors in ZnTe
Author(s) -
Samindayar K.,
Magnea N.,
Pautrat J. L.,
Pajot B.
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.2221060124
Subject(s) - impurity , luminescence , acceptor , infrared , absorption (acoustics) , analytical chemistry (journal) , phonon , materials science , doping , atomic physics , chemistry , condensed matter physics , physics , optics , optoelectronics , organic chemistry , chromatography , composite material
Infrared measurements are made on ZnTe doped with Ag, Cu, and Au acceptor impurities. Observed transitions are discussed in the framework of the theory of Baldereschi. The binding energies E a are (123.8 ± 0.5), (150.3 ± 0.5), and (271.6 ± 0.5) meV for Ag, Cu, and Au impurity, respectively, These results are in good agreement with that deduced from luminescence experiments. The average number of emitted phonons N̄ is deduced for all known acceptors in ZnTe (Li, P, As, Ag, Cu, and Au) using luminescence and IR measurements. An empirical relation N̄ equals; 62 E 2 a is found. The cross‐section for Au in ZnTe is found to be (3.5 ± 0.7) × 10 −16 cm 2 with an effective field ratio which ranges between 2.3 and 4.