Development of photoelectrochemical reaction system constituted of polymer-based semiconductor heterojunction

研究了半导体聚合物薄膜在ITO电极上的光电化学性质。p型半导体聚合物包覆电极在苯甲酰甲酸甲酯存在下产生阴极光电流，而n型半导体聚合物包覆电极在2-巯基乙醇存在下产生稳定的阳极光电流。p型和n型半导体聚合物双层膜的形成在聚合物/水界面表现出相反的光电极特性，聚3-己基噻吩层的引入改善了酞菁修饰电极的光电响应。

The photoelectrochemical properties of semiconducting polymers thin films on ITO electrodes were investigated in aqueous media. Photoirradiation of the p-type semiconducting polymer-coated electrode resulted in cathodic photocurrents in the presence of methyl benzoylformate, whereas the n-type semiconducting polymer-coated electrode generated stable anodic photocurrents in the presence of2-mercaptoethanol. Formation of the bilayer film of the p-and n-type semiconducting polymers exhibited opposite photoelectrode characteristics at the polymer/water interface, and introduction of poly(3-hexylthiophene) layer improved photoelectrochemical response of phthalocyanine-modified electrode.