19 October 2000 Water effect on primary photocarrier generation process in Y-form titanyl phthalocyanine
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We have studied the effect of adsorbed water on the primary photocarrier-generation process in Y-form titanyl phthalocyanine (Y-TiOPc) by using ground-state absorption and time-resolved fluorescence spectroscopy. The water adsorption is the unique feature of Y-TiOPc , that is not observed in the other polymorphs of TiOPc. We report for the first time the water-induced change of the absorption spectrum, that is, the hydrochromism of Y-TiOPc. The fluorescence lifetimes and amplitudes of Y-TiOPc are greatly influenced by adsorbed water. We have found that the mechanism of the fluorescence quenching of Y-TiOPc caused by water adsorption is the same as that by an electric field. Adsorbed water enhances the photocarried generation of Y- TiOPc in the same way as an electric field does in the picosecond time regime.
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Shoichi Yamaguchi, Shoichi Yamaguchi, Yutaka Sasaki, Yutaka Sasaki, } "Water effect on primary photocarrier generation process in Y-form titanyl phthalocyanine", Proc. SPIE 4110, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VI, (19 October 2000); doi: 10.1117/12.404800; https://doi.org/10.1117/12.404800

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