Abstract: The supersensitization of the supersensitizing systems based on AgBr single-crystal has been studied by means of the Dember effect.It can be considered that the role of supersensitizers can be correlated directly with their measured Dember effects.The electronic energy levels and geometric position of supersensitizer relative to those of AgBr and sensitizing dyes and the diffusion direction of the free charge carriers have been discussed.The results of the experiments showed that supersensitization will be the most efficiant in the studied supersensitizing systems when the supersensitizer is in direct contact with silver bromide.

Key words: Supersensitization, Dember effect, geometric position of supersensitizers