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On the properties of cobalt impurities in zinc selenide crystals. I. Effect of in‐band position of states on photoelectric properties
Author(s) -
Radlinski A. P.
Publication year - 1977
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.2220840213
Subject(s) - zinc selenide , photoconductivity , excited state , photocurrent , ion , impurity , atomic physics , absorption spectroscopy , autoionization , band gap , materials science , cobalt , photoelectric effect , crystal (programming language) , zinc , chemistry , physics , inorganic chemistry , optoelectronics , ionization , photoionization , optics , organic chemistry , programming language , computer science , metallurgy
The absorption and photoconductivity spectra of ZnSe:Co in the spectral region of the 4 A 2 ( 4 F) → → 4 T 1 ( 4 F) and 4 A 2 ( 4 F) → 4 T 1 ( 4 P) crystal field transitions within the 3d 7 shell of the Co 2+ ion are presented. The structure of the photocurrent observed here is associated with the degeneracy of the 4 T 1( 4 P) and 4 T 1 ( 4 F) excited states of the Co 2+ ion with the conduction band of ZnSe. The autoionization times of Co 2+ ion via those states to the conduction band are estimated to lie within the range of 10 −9 to 10 −4 s.