Photoelectrochemical processes at electrolyte-multinary layered semiconductors interfaces

The electric and photoelectric properties of the electrolyte-semiconductor interface in the chains formed by metal auxiliary electrode-electrolyte-mul tinary layered semiconductors have been investigated. The dependencies of f latband potential phi (fb) and contact potential phi (c) at the electrolyte -semiconductor interface on the concentration of S2-/S-2(2-) ions and the v alue of pH of the electrolyte were studied. The values of the photopotentia l up to 0.6 V and the shea circuit current up to 1 mA/cm(2) have been obtai ned. It was shown that the photoelectrode corrosion is practically absent. An energetic diagram for the investigated system is proposed. (C) 2001 Else vier Science B.V. All rights reserved.