Abstract
A new type of photodiode was proposed based on photochemical electron transfer occurring between bilayer membranes of polymer pendant Ru(bpy) 2+ 3 complex and pendant viologen. A bilayer system composed of a graphite electrode coated with polymer pendant Ru(bpy) 2+ 3 as inner layer in contact with the electrode and with polymer pendant viologen as outer layer induced photocurrent. The cathodic photocurrent was much higher than that induced by a monolayer system composed of mixture. The presence of O 2 scarcely affected the cathodic photocurrent induced by the bilayer system, but enhanced that of the monolayer system by 46 times.
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