(JP10340742-A)      A photoresponsive electrode for use in a wet solar cell comprises; a metal film with fixed on it a vapour deposited photoresponsive molecule and a light irradiating portion having a different dielectric constant to the metal (prism or optical fibres). The metal film is capable of being irradiated with light via the light irradiating portion at a substantial resonance incident angle capable of inducing a surface plasmon resonance in the interface between the metal and the light irradiating portion. In a preferred cell the metal film (11) is in contact with a solution of photoresponsive molecules (2) preferably a porphyrin derivative in a cell (3). The light irradiating portion in contact with the metal is a series of prisms (12).    USE -   Wet solar cells.    ADVANTAGE -   By using surface plasmon resonance the photoresponsive molecule fixed to the metal surface can be very efficiently excited. By red light having a long wavelength the intensifying effect of the electric field in the local electric field formed by the surface plasmon resonance is increased. The molecule can be excited even by a red light of a low energy.    (US6127624-A)      A photoresponsive electrode for use in a wet solar cell comprises; a metal film with fixed on it a vapour deposited photoresponsive molecule and a light irradiating portion having a different dielectric constant to the metal (prism or optical fibres). The metal film is capable of being irradiated with light via the light irradiating portion at a substantial resonance incident angle capable of inducing a surface plasmon resonance in the interface between the metal and the light irradiating portion. In a preferred cell the metal film (11) is in contact with a solution of photoresponsive molecules (2) preferably a porphyrin derivative in a cell (3). The light irradiating portion in contact with the metal is a series of prisms (12).    USE -   Wet solar cells.    ADVANTAGE -   By using surface plasmon resonance the photoresponsive molecule fixed to the metal surface can be very efficiently excited. By red light having a long wavelength the intensifying effect of the electric field in the local electric field formed by the surface plasmon resonance is increased. The molecule can be excited even by a red light of a low energy.