Spectral Sensitization of Silver Halides: The Last Twenty Years

The progress in spectral sensitization of silver halides in the last twenty years is altogether reflected ill the work published by Paul Gilmal/. Photo-induced electron and IlDle injection betweetJ the silver halide and the spectral sensitizing dye, as well as betweel/ sensitizer and supersensitizer, are the essential events ill spectral sellsitization. These phenomena are dependent on the relatiollships between the valence and conduction band ellergy of the silver halide all the one Iland and between the HOMO and LUMO energies of the spectral sensitizer on the oilIer hand, where the relative position of the dye’s energy levels can be evalrlated from its electrochemical reduction and oxidation half-wave potential. In the future, expanding activities are to be expected in the investigation of the kinetics of the competing primary processes whicll ultimately determine spectral sellsitization.