Abstract
Experiments described in this paper show that there is the photoconductive effect of liquid, i.e. when light shines into a sort of alkali, acid or salt solution, the conductivity of the solution will increase. The mechanism of the effect is explained as follows. When hydrated ions in the solution absorb photons with their high enough energies, they will decompose to naked ions and water-molecules. The naked ions can reach an anode or a cathode more easily and faster than the hydrated ions; It is possible that when a molecule in the solution absorbs a photon with its high enough energy, it will decompose to negative and positive ions. Based on the effect, a device producing hydrogen by the solar-energy had been devised.
Highlights
The conventional photoconductive effect is that the conductance of a semiconductor will change when light shines onto the semiconductor
In contrast with the Becquerel effect, when light shines into a solution, there is no potential difference appearing in spite of the conductance of the solution increases
As mentioned above, expending electric energy when light shines into the solution is less than that when there is no light to shine the solution when the same quantity of hydrogen is produced
Summary
The conventional photoconductive effect is that the conductance of a semiconductor will change when light shines onto the semiconductor. It is one of the photoelectric effects. In contrast with the Becquerel effect, when light shines into a solution, there is no potential difference appearing in spite of the conductance of the solution increases.
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