NOVELTY - Photovoltaic device having cell comprises cathode and anode coupled to electrical circuit; molecular photoelectric center dispersed and mobile in medium; first and second redox species dispersed and mobile in medium to form oxidized cathode and anode charge transfer mediator; where photoelectric center absorbs electromagnetic irradiation to form activated photoelectric center having electric dipole having rate of decay by charge recombination within photoelectric center.    USE - As bio-photovoltaic device useful in the field of electrochemistry for photoelectric conversion and in-situ charge storage.    ADVANTAGE - The photovoltaic device is adapted to permit photoelectric center in the medium to receive light energy, and configured to include light-harvesting unit, through which photoelectric center receives electromagnetic radiation. The device has both photoelectric conversion and storage functions integrated in single cell structure. The high concentration of photoelectric centers can be provided in fluid medium to enhance light absorption and current generation. The photoelectric center provides charge generation, and redox species to transfer charges between photoelectric center and conductive contacts to be utilized in an external circuit.    DETAILED DESCRIPTION - Photovoltaic device having cell comprises cathode and anode coupled to electrical circuit; molecular photoelectric center dispersed and mobile in medium; first redox species dispersed and mobile in medium to accept electrons from cathode, to form reduced cathode charge transfer mediator and donate electrons to photoelectric center to form oxidized cathode charge transfer mediator; and second redox species dispersed and mobile in medium, which accepts electrons from photoelectric center, to form reduced anode charge transfer mediator, and donate electrons to anode, to form oxidized anode charge transfer mediator; where photoelectric center absorbs electromagnetic irradiation to form activated photoelectric center having electric dipole, with rate of decay by charge recombination within photoelectric center.    DESCRIPTION OF DRAWING(S) - The figure shows schematic diagram of mediators and electrodes, with selected relative spacing of energy levels that facilitates electron transfer and charge generation by the device.