THE EFFECT OF LONG-CHAIN COUMARIN FILMS O N THE ELECTRON-TRANSFER AT THE LIQUID-JUNCTION ON N-SI NI/

The modification of stearic acid-coumarin LB films on the performance of n-Si/Ni electrode has been studied in this paper The deposition of the LB film was Z-type. There was a blue shift of absorption peak (fro m 343 nm to 325 nm) after the film had been prepared on a glass plate. Under the illumination of 60 m W degrees cm-2 bromine-tungstem lamp l ight, the energy conversion efficiency of n-Si/Ni/3LB/Fe(CN)63-/4-/Pt cell has been increased by 100% and the stability has been apparently enhanced. The AC impedance measurement has shown that the charge trans fer resistance of n-Si/Ni/3LB electrode decreased greatly under the ir radiation. The research results indicates that the modification of ste aric acid-coumarin LB films on the photoelectron transfer process on n -Si/Ni electrode is good.