Abstract: Light-induced heterogeneous charge transfer processes of CdSe thin film electrodes modified with FcOCOC₁₇H₃₅ L-B films were studied in Fe(CN)₆^4- solution.Heterogeneous charge transfer rate constant K_et were determined and the possible rate limiting situation existed in photoelectrochemical processes were analysed.The results indicated that interfacial charge transfer may be the rate limiting step.A fast interfacial charge transfer processes based on selecting electro-active molecules for modification,and redox couples of solution are expected for improving in- the photoelectrochemical behavior of CdSe thin film electrodes.

Key words: thin film electrode, interfacial charge transfer, reaction rate constant, modified electrode, L-B films