Photoelectrochemical properties of 'Q-state' CdS particles in arachidic acid Langmuir-Blodgett films

Abstract

The photoelectrochemical (PEC) characteristics of thin films of 'Q-state' CdS semiconductor particles in arachidic acid Langmuir-Blodgett (LB) layers have been examined. Initially, 'Q-state' size CdS particles of ca. 2 nm were formed in the film and then progressively grown to ca. 10 nm by a cyclic sequence, which involves exposing the film to H2S(g) following its immersion in a CdCl2(aq) solution. A PEC cell was constructed using a layered glass/ITO-CdS/LB plate as the photoanode and a standard calomel electrode (SCE) as the reference electrode. The photoelectrical response of electrodes coated with LB films containing CdS particles of various sizes was investigated using white light. The r..