Effects of elemental composition variations of Keggin polyoxometalates on photocurrent generation of their layer-by-layer self-assembled films with a hemicyanine dye
作者： Li-Hua Gao , Jin-Feng Zhang , Hui-Li Wang , Xiao-Yan Lin , Jian-Min Qi
DOI: 10.1016/J.ELECTACTA.2015.03.062
关键词:
摘要: A series of layer-by-layer electrostatically self-assembled films consisting one three Keggin-type polyoxometalates (POMs) [BW12O40]5−, [PW12O40]3− and [PMo12O40]3−, a hemicyanine (E)-1,1′-methylenebis(4-(4-(dimethylamino)styryl)pyridinium)bromide (H1Br2) are prepared. The UV–vis absorption spectroscopy showed that the were uniformly deposited with visible bands for being bathochromically shifted respect to H1Br2 aqueous solution different extents depending on POMs. (POMs/H1)n exhibited stable photocurrents differed by over 7 folds POMs as irradiated white light. effects applied bias voltages, electron acceptor added in electrolyte, layer numbers films, light intensities, compositions photocurrent generation discussed.
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