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Optical Absorption of Self‐Trapped Holes in AgCl and AgBr
Author(s) -
Ulrici W.
Publication year - 1970
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.19700400214
Subject(s) - chalcogen , infrared , valence (chemistry) , doping , silver halide , absorption (acoustics) , halide , irradiation , lattice (music) , absorption band , materials science , absorption spectroscopy , chemistry , analytical chemistry (journal) , inorganic chemistry , crystallography , optics , optoelectronics , nanotechnology , physics , organic chemistry , layer (electronics) , chromatography , nuclear physics , acoustics , composite material
In AgCl crystals doped with V 3+ , Cr 3+ , Fe 3+ , Ni 2+ , Cu 2+ , and chalcogen an infrared absorption at 9200 cm −1 is measured after irradiation at 20 °K. By comparison with ESR measurements on these crystals the infrared absorption can be assigned to holes trapped at lattice cations (Ag 2+ ). The localization of the holes at lattice cations is explained by the valence band structure of silver halides and a Jahn‐Teller effect of the 4d 9 configuration. AgBr crystals doped with V 3+ or Cr 3+ show after irradiation at 20 °K an infrared absorption at 7100 cm −1 with analogous properties as in AgCl.
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