Effect of RuCl3 subphase on second harmonic generation and photocurrent generation from a benzothiazolium styryl dye LB ®lm

Langmuir±Blodgett ®lm of an amphiphilic heteroaromatic styryl dye, 2-(4-dihexadecylaminostyryl) benzothiazole methiodide (I), was fabricated from RuCl3 subphases, and was characterized by using UV±VIS spectra and XPS measurements. Experimental data indicated that addition of RuCl3 into subphase is favorable to the second harmonic generation of the ®lms, but unfavorable to photocurrent generation from the ®lm. Effects of some factors such as bias voltage, methyl viologen (MV2‡), O2 and hydroquinone (H2Q) on the photocurrent generation have also been investigated. Based on the experimental data, a possible scheme concerned effect of RuCl3 on the SHG and photocurrent generation of the ®lms was proposed. # 2001 Elsevier Science B.V. All rights reserved