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Photoconductivity of Lead(II)‐ and Cadmium (II)‐Doped Silver Bromide
Author(s) -
Deri R. J.,
Haynam Ch.,
Spoonhower J. P.
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.2221090223
Subject(s) - doping , dopant , analytical chemistry (journal) , impurity , arrhenius equation , x ray photoelectron spectroscopy , materials science , kinetics , ion , photoconductivity , conductivity , silver bromide , activation energy , inorganic chemistry , chemistry , nanotechnology , chemical engineering , optoelectronics , physics , organic chemistry , chromatography , quantum mechanics , layer (electronics) , engineering , silver halide
The photoresponse of AgBr binderless powder precipitates doped with Pb 2+ and Cd 2+ ions is studied near liquid‐nitrogen temperature by using microwave cavity techniques. Pb 2+ ‐ and Cd 2+ ‐doped samples have much longer photoelectron lifetimes and higher peak photoelectron signals than undoped samples. The decay kinetics of the doped samples appears to consist of the superposition of two first‐order processes. The temperature dependence of the kinetics is established to follow the Arrhenius model, and activation energies are deduced. The data are interpreted in terms of “impurity conductivity” caused by photoelectrons trapped by the Pb 2+ /Cd 2+ dopants and the migration of silver‐ion interstitials.